PWM Switching Regulators

A pulse width modulation switching regulator, or PWM switching regulator, is used to control the output voltages within devices. Managing voltage is usually done via one of two methods – PWM or PFM (pulse frequency modulation), with PWM the most commonly used. So if you’re looking for a PWM controller, why not browse our selection today and pick out the one that’s right for you.

How does a PWM switching regulator work?

PWM switching regulators are able to control analog circuits with digital outputs. An analog device – for example a 9V battery – has a signal of constantly changing value, so a PWM controller is used to digitally encode that signal. Additionally, a PWM buck controller – also known as a step-down converter – can be used if the desired effect is to lower the voltage from the battery, and this component has proven more efficient than low-dropout regulators (LDOs).

With a PWM switching regulator, the current is supplied to the analog load via a series of recurring on and off pulses, therefore converting the input voltage to the desired output voltage. The ratio between these on and off pulses is known as the duty cycle.

For example, a PWM controller operating at a duty cycle of 10% - that is, on for 10% of the time and off for 90% - will mean a 0.9V analog signal from a 9V battery, while a 50% duty cycle will produce a 4.5V signal.

What are the advantages of PWM vs PFM?

PFM controllers operate with a fixed rate of on or off pulses and perform their regulation by altering the on or off-time. With PWM switching regulators, meanwhile, the frequency is fixed and it is the duty cycle that is used to control the voltage.

When using a PWM controller, switching noise can be predicted which therefore makes the filtering process easier. Additionally, the signal remains digital from the processor to the control system, so there’s no need for any conversion from digital to analog.

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Part Details Brand Stock PWM Controller Type Number of PWM Outputs Minimum Input Voltage Maximum Input Voltage Output Voltage Output Current Number of Outputs Line Regulation Load Regulation Mounting Type Package Type Pin Count Maximum Switching Frequency Efficiency Output Type Maximum Operating Temperature Dimensions Length Width Height Minimum Operating Temperature Typical Operating Supply Voltage Supply Voltage
ROHM BA17806CP-E2 PWM Switching Regulator, 1 A, 6 V, 3-Pin, TO-220CP
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ROHM BA17807CP-E2 PWM Switching Regulator, 1 A, 7 V, 3-Pin, TO-220CP
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ROHM BA17808CP-E2 PWM Switching Regulator, 1 A, 8 V, 3-Pin, TO-220CP
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ROHM BA17809CP-E2 PWM Switching Regulator, 1 A, 9 V, 3-Pin, TO-220CP
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ROHM BA17810FP-E2 PWM Switching Regulator, 1 A, 10 V, 3 + Tab-Pin, TO-252
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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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6.5 x 5.5 x 2.3mm Please note that the Stock level on this page is periodically updated during the day.

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6.5mm Please note that the Stock level on this page is periodically updated during the day.

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5.5mm Please note that the Stock level on this page is periodically updated during the day.

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2.3mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 12.5 → 25V Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 184-8161
  • Brand ROHM
  • Mfr. Part No. BA17810FP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 12.5 V Please note that the Stock level on this page is periodically updated during the day.

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25 V Please note that the Stock level on this page is periodically updated during the day.

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10 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Surface Mount Please note that the Stock level on this page is periodically updated during the day.

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TO-252 Please note that the Stock level on this page is periodically updated during the day.

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3 + Tab Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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6.5 x 5.5 x 2.3mm Please note that the Stock level on this page is periodically updated during the day.

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6.5mm Please note that the Stock level on this page is periodically updated during the day.

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5.5mm Please note that the Stock level on this page is periodically updated during the day.

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2.3mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 12.5 → 25V Please note that the Stock level on this page is periodically updated during the day.

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ROHM BA17812CP-E2 PWM Switching Regulator, 1 A, 12 V, 3-Pin, TO-220CP
  • $ 0.905
  • Each (On a Reel of 500)
  • Compare
  • RS Stock No. 184-8035
  • Brand ROHM
  • Mfr. Part No. BA17812CP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 14.5 V Please note that the Stock level on this page is periodically updated during the day.

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27 V Please note that the Stock level on this page is periodically updated during the day.

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12 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Through Hole Please note that the Stock level on this page is periodically updated during the day.

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TO-220CP Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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10 x 4.5 x 15.2mm Please note that the Stock level on this page is periodically updated during the day.

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10mm Please note that the Stock level on this page is periodically updated during the day.

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4.5mm Please note that the Stock level on this page is periodically updated during the day.

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15.2mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 14.5 → 27V Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 184-8174
  • Brand ROHM
  • Mfr. Part No. BA17812CP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 14.5 V Please note that the Stock level on this page is periodically updated during the day.

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27 V Please note that the Stock level on this page is periodically updated during the day.

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12 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Through Hole Please note that the Stock level on this page is periodically updated during the day.

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TO-220CP Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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10 x 4.5 x 15.2mm Please note that the Stock level on this page is periodically updated during the day.

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10mm Please note that the Stock level on this page is periodically updated during the day.

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4.5mm Please note that the Stock level on this page is periodically updated during the day.

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15.2mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 14.5 → 27V Please note that the Stock level on this page is periodically updated during the day.

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ROHM BA17815CP-E2 PWM Switching Regulator, 1 A, 15 V, 3-Pin, TO-220CP
  • $ 0.905
  • Each (On a Reel of 500)
  • Compare
  • RS Stock No. 184-8036
  • Brand ROHM
  • Mfr. Part No. BA17815CP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 17.5 V Please note that the Stock level on this page is periodically updated during the day.

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30 V Please note that the Stock level on this page is periodically updated during the day.

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15 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Through Hole Please note that the Stock level on this page is periodically updated during the day.

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TO-220CP Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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10 x 4.5 x 15.2mm Please note that the Stock level on this page is periodically updated during the day.

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10mm Please note that the Stock level on this page is periodically updated during the day.

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4.5mm Please note that the Stock level on this page is periodically updated during the day.

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15.2mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 17.5 → 30V Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 184-8194
  • Brand ROHM
  • Mfr. Part No. BA17815CP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 17.5 V Please note that the Stock level on this page is periodically updated during the day.

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30 V Please note that the Stock level on this page is periodically updated during the day.

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15 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Through Hole Please note that the Stock level on this page is periodically updated during the day.

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TO-220CP Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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10 x 4.5 x 15.2mm Please note that the Stock level on this page is periodically updated during the day.

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10mm Please note that the Stock level on this page is periodically updated during the day.

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4.5mm Please note that the Stock level on this page is periodically updated during the day.

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15.2mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 17.5 → 30V Please note that the Stock level on this page is periodically updated during the day.

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ROHM BA17818CP-E2 PWM Switching Regulator, 1 A, 18 V, 3-Pin, TO-220CP
  • $ 0.905
  • Each (On a Reel of 500)
  • Compare
  • RS Stock No. 184-8037
  • Brand ROHM
  • Mfr. Part No. BA17818CP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 21 V Please note that the Stock level on this page is periodically updated during the day.

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33 V Please note that the Stock level on this page is periodically updated during the day.

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18 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Through Hole Please note that the Stock level on this page is periodically updated during the day.

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TO-220CP Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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10 x 4.5 x 15.2mm Please note that the Stock level on this page is periodically updated during the day.

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10mm Please note that the Stock level on this page is periodically updated during the day.

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4.5mm Please note that the Stock level on this page is periodically updated during the day.

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15.2mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 21 → 33V Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 184-8214
  • Brand ROHM
  • Mfr. Part No. BA17818CP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 21 V Please note that the Stock level on this page is periodically updated during the day.

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33 V Please note that the Stock level on this page is periodically updated during the day.

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18 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Through Hole Please note that the Stock level on this page is periodically updated during the day.

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TO-220CP Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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10 x 4.5 x 15.2mm Please note that the Stock level on this page is periodically updated during the day.

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10mm Please note that the Stock level on this page is periodically updated during the day.

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4.5mm Please note that the Stock level on this page is periodically updated during the day.

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15.2mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 21 → 33V Please note that the Stock level on this page is periodically updated during the day.

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  • RS Stock No. 184-8226
  • Brand ROHM
  • Mfr. Part No. BA17824CP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 27 V Please note that the Stock level on this page is periodically updated during the day.

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33 V Please note that the Stock level on this page is periodically updated during the day.

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24 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Through Hole Please note that the Stock level on this page is periodically updated during the day.

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TO-220CP Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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10 x 4.5 x 15.2mm Please note that the Stock level on this page is periodically updated during the day.

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10mm Please note that the Stock level on this page is periodically updated during the day.

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4.5mm Please note that the Stock level on this page is periodically updated during the day.

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15.2mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 27 → 33V Please note that the Stock level on this page is periodically updated during the day.

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ROHM BA17824CP-E2 PWM Switching Regulator, 1 A, 24 V, 3-Pin, TO-220CP
  • $ 0.905
  • Each (On a Reel of 500)
  • Compare
  • RS Stock No. 184-8038
  • Brand ROHM
  • Mfr. Part No. BA17824CP-E2
ROHM Please note that the Stock level on this page is periodically updated during the day.

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Check Stock Levels - - 27 V Please note that the Stock level on this page is periodically updated during the day.

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33 V Please note that the Stock level on this page is periodically updated during the day.

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24 V Please note that the Stock level on this page is periodically updated during the day.

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1 A Please note that the Stock level on this page is periodically updated during the day.

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- - - Through Hole Please note that the Stock level on this page is periodically updated during the day.

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TO-220CP Please note that the Stock level on this page is periodically updated during the day.

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3 Please note that the Stock level on this page is periodically updated during the day.

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- - - +85 °C Please note that the Stock level on this page is periodically updated during the day.

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10 x 4.5 x 15.2mm Please note that the Stock level on this page is periodically updated during the day.

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10mm Please note that the Stock level on this page is periodically updated during the day.

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4.5mm Please note that the Stock level on this page is periodically updated during the day.

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15.2mm Please note that the Stock level on this page is periodically updated during the day.

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-40 °C Please note that the Stock level on this page is periodically updated during the day.

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- 27 → 33V Please note that the Stock level on this page is periodically updated during the day.

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