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January 15, 2024

Robust 24VAC to 24VDC Power Supply, 50 Watts

24VAC to 24VDC AC/DC converter  

24 volt AC/DC converters with 19 to 28 VAC input. Made in USA, NAFTA qualified. 50Hz, 60Hz, 400Hz

24VAC inverters, DC converters, battery backups
More 24VAC low voltage power options
PST-ADC2424-2A add_to_cart.gif
Quantity Price
1-9 $53
10-99 $48
100-499 $43
500+ $39
Optional DIN mounting hardware
reverse view of DIN rail mountingadd_to_cart.gif
Quantity Price
1-49 $3.00
50-99 $2.50
Includes screws and hardware
for both 35mm and 15mm DIN rails
(does not include the rail)

These are regulated switching power converters (switchmode), designed to allow the use of 24 volt DC equipment in 24VAC security, CCTV camera systems and energy management applications. These 50 Watt converters have been designed to be very rugged electrically and have precise voltage regulation.

These are also known as 24 volt rectifiers, and voltage regulators. They can be used whenever 24VAC power is available and 24VDC power is needed, up to 60 watts.

Custom output voltages are available by special order, let us know what you need.

24VAC to 24VDC rectifier for security camera installations


Input Voltage

20.5VAC to 28VAC, 50Hz or 60Hz, reduced capacity at 400Hz

Output Voltage

24.0 VDC ± 0.2 VDC

Output Current

2A or less, 3A if the input voltage is above 24VAC

Line regulation

± 8%

Load regulation

± 8.0%

Maximum output ripple

5% p-p

Maximum switching noise level

90mV p-p

Maximum operating temperature range

-40°C to 75°C (-40°F to 167°F)

Maximum storage temperature range

-40°C to 90°C (- 40°F to 194°F)

Minimum efficiency

78% 24 VAC input, 0.15A load

Physical Specifications


3.8 oz, 108 grams

Dimensions including flange




126mm, 5 inches
56 mm, 2.2 inches
43 mm, 1.7 inches
Mounting holes Slots are 6mm wide, 10mm long and 114 mm center-to-center  
Drawing for mounting ADC2424.PDF  
3D files IGESSTEP  


Input connector

Output connector

Terminal blocks

2 position screw terminal block

2 position screw terminal block

2EDCK; 28AWG-12AWG wires accepted

Maximum output current depends on input voltage*

Minimum input voltage 50/60Hz Maximum output current at 24VDC Watts
22 VAC 500 mA 12W
23.1 VAC 1A 24W
24.4 VAC 2A 48W
25.1 VAC 3A 72W

400Hz input? Maximum output current depends on input voltage*

Minimum input voltage Maximum output current at 24VDC Watts
21VAC 400Hz 0.04A 1 W
22 VAC 400Hz 130 mA 3W
23 VAC 400Hz 300 mA 7.2W
24 VAC 400Hz 600 mA 14.4W
25 VAC 400Hz 900 mA 21.6W
26 VAC 400Hz 1A 24W
27VAC 400Hz 1.5A 36W
28VAC 400Hz 2.3A 62W
*This calculation assumes that the AC input source has enough power available to supply the watts output.

The PST-ADC2424 works with our DIN rail mounting system, but is not centered as shown below:
din rail mount

din rail mount from the bottom

Q: I don't have 60 watts available on my 24VAC line, is it OK to operate the PST-AC2424-2A at lower powers?
A: Yes, you can use this converter at lower powers. The power supply module will only draw the power it needs to supply your load. Of course there must be enough power (watts) available on the 24VAC line to power your load.

Q: How can you regulate the voltage so accurately with such a wide range of input voltages?
A: The PST-AC2424-2.5A is not just a rectifier, it is a fully configured switchmode power supply with a wide range input centered on 24VAC. With the current and voltage feedback loops in the switchmode circuit, the output voltage can be locked solid. This makes the output voltage independent of input voltage or output current.

Q: Does the rectifier add noise to the AC line?
A: No, the sine wave of the AC line is not distorted by the PST-AC2424-2A. Thus you don't have to worry about noise being transmitted to other devices connected to the 24VAC line. However, most other rectifiers do distort the AC power considerably, especially half-wave rectifiers.


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