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RS PRO PCB Mount Switching Regulator, 9V dc Output Voltage, 12 → 36V dc Input Voltage, 500mA Output Current

38 In stock for delivery within 4 working days
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RS Stock No.:
COO (Country of Origin):
unitsPer unit
1 - 4SGD3.79
5 - 9SGD3.73
10 - 24SGD3.64
25 - 49SGD3.55
50 +SGD3.44

RS PRO DC-to-DC Switching Regulators, K78 series

Introducing the RS PRO K78 range Switching Regulators, a series of wide input voltage non-isolated and regulated singe output converters. These high-quality switching regulators are direct replacements for the LM78 series three-terminal linear regulators, with the added benefit of being able to perform load conversions for greater flexibility. These RS PRO regulated converters have a low ripple and standby power consumption, making them highly efficient to work at full load without the need for a heat sink, and additionally making them ideal for use in instrumentation, IoT and a wide variety of battery-powered applications.

Features and Benefits:

  • The RS PRO regulators offer high efficiency of up to 95%

  • No-load input current as low as 0.2mA

  • Operating ambient temperature range -40°C to +85 °C

  • Output short-circuit protection

  • Pin compatible with RS PRO LM78xx series as a direct replacement voltage regulator

  • 3 Year Warranty


Switching regulators are circuits that are easily able to take energy from an input voltage source and push them into the output by using an electrical switch and controller. This switch and controller have the ability to ’regulate’ the rate at which the energy is moved to the output. The main benefit of switching regulators is that they work at a greater efficiency than their linear counterparts, making them more economical and better to drive higher input voltages in a wide variety of power management applications. Switching regulators are commonly used in:

  • Mobile phones

  • Games consoles

  • Computers and laptops

  • Digital cameras

  • Power supplies

Approvals and Certifications:

  • IEC60950, UL60950, EN60950 Approved

  • CE Certified

What other switching regulators are available in this range?

The range of RS PRO K78 series switching regulators are listed below:
193-3974 24 VDC (Input Voltage), 3.3 VDC (Output Voltage), 0.5A
193-3976 24 VDC (Input Voltage), 5 VDC (Output Voltage), 0.5A
193-3978 24 VDC (Input Voltage), 9 VDC (Output Voltage), 0.5A
193-3980 24 VDC (Input Voltage), 12 VDC (Output Voltage), 0.5A
193-3982 24 VDC (Input Voltage), 15 VDC (Output Voltage), 0.5A


RS PRO is our own brand range and brings you a wide range of high-quality, great value products offering you more choice. Trusted by engineers all over the world, every part of every RS PRO product has been rigorously tested against demanding industry standards
they’re only given the RS PRO seal of approval if we’re confident of their exceptional quality, which means you can be confident too.

Input Voltage12 → 36V dc
Output Voltage9V dc
Number of Outputs1
Output Current500mA
Mounting TypePCB Mount
Minimum Temperature-40°C
Maximum Temperature+85°C
MTBF2000 (Minimum)kh
Load Regulation±0.3 (Typ.)%
Line Regulation±0.4%
Ripple And Noise75mV Pk-Pk
Weight1.8 (Typ.)g
Switching Frequency Range550 → 850kHz
Allowed Circuit ConfigurationsParallel
Power Signal Conversion TypeDC-DC
Maximum Input Current1.5mA