SDC 631 Series - 1.5 Amp Regul...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$328.00
$236.14
SDC SDC 631 Series - 1.5 Amp Regulated & Filtered Low Voltage Power Supply SDC-631

SDC 631 Series - 1.5 Amp Regulated & Filtered Low Voltage Power Supply

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Model: 631RFL
$328.00
$236.14

In Stock (leaves warehouse same day if ordered before 3pm ET)

$328.00
$236.14
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SDC 631RF Series Power Controllers – Filtered DC Power for Access Control Systems

The SDC 631RF series of DC power controllers is specifically engineered to meet the unique and demanding power requirements of electronic access control systems. With a hybrid linear/switching power supply design, the 631RF provides highly regulated and filtered low-voltage DC output—ideal for supporting electric locks, maglocks, door hardware, and life safety equipment.

Unlike traditional power supplies, the SDC 631RF addresses common issues such as voltage spikes and current instability—responsible for up to 85% of technical support calls and access control failures. This model delivers steady, clean power to protect sensitive circuitry in access control panels and locking devices.

Models Available

  • SDC 631RF – 1.5 Amp DC Power Controller with Cabinet

  • SDC 631RFA – 1.5 Amp DC Power Controller with Large Cabinet

  • SDC 631RFL – 1.5 Amp DC Power Controller Less Cabinet (for panel integration)

Standard Features

  • Regulated and filtered linear DC power output

  • Dual voltage field selectable (12VDC or 24VDC)

  • Class 2 power output – suitable for low-voltage system installations

  • Surge protection on both input and output lines

  • Fire/emergency release input for override during fire alarm activation

  • Visual LED status indicator

  • Isolated battery charging circuit with low battery disconnect

  • Enclosures include pre-configured control module mounting holes (RF and RFA models only)

Ideal Applications

  • Multi-door access control systems

  • Maglocks, electric strikes, and electric latch retraction devices

  • Fail-safe / fail-secure electric locking hardware

  • Integration with fire alarm and life safety systems

Access Control Power Insight

Access control systems differ from video or security alarm systems in that they draw significantly more current during locking and access cycles. The SDC 631RF provides reliable, regulated current to prevent issues caused by "dirty power," transients, or load surges—ensuring optimal system performance and hardware longevity.

CERTIFICATIONS

UL 294 Access Control System Units
UL 603 Power Supplies for Use with Burglar-Alarm Systems
ULC-S318 Power Supplies for Buglar Alarm Systems

RESOURCES

631RF-Datasheet.pdf (sdcsecurity.com)

SDC WEBSITE

 

Manufacturer Resources

Product Specs

Subcategory:
Power Supply
Series:
631 Series
Product Group:
Electronic Access Controls
Product Subgroup:
Controllers, Power Supplies and Transformers
Commercial/Residential:
Commercial
Product Type:
Power Supplies
Electronic:
Yes
Current:
1.5A
Tags:
sdc 631rf
Product Model:
631RF, 631RFA, 631RFL
Product Voltage:
120V
Product Category:
Electronic Access Controls

SDC 631RFL – Frequently Asked Questions

1) What is the SDC 631 series power supply used for?
The SDC 631 series provides 1.5 amp regulated and filtered low voltage DC power for access control systems, card readers, electric strikes, and door hardware. It converts standard AC line voltage to clean 12VDC or 24VDC output.
2) What voltage outputs are available with this power supply?
The 631 series typically offers selectable 12VDC or 24VDC output options. Check the specific model number to confirm voltage rating. Maximum current output is 1.5 amps continuous.
3) Can this power supply handle electric strike loads?
Yes, the regulated filtered output handles electric strike inrush currents effectively. The 1.5 amp rating supports most standard strikes. Verify your strike's current draw specifications before installation.
4) How do you mount the SDC 631 series power supply?
The unit typically mounts inside electrical enclosures or junction boxes using provided mounting tabs. Ensure adequate ventilation space around the transformer. Mount in dry locations only.
5) What wire gauge should be used with this power supply?
Use 18 AWG minimum for DC output connections up to 50 feet. Longer runs may require 16 AWG or larger to prevent voltage drop. AC input connections follow local electrical codes for low voltage transformers.
6) Does this power supply include surge protection?
The filtered design provides basic line conditioning. For enhanced protection in surge-prone areas, consider adding dedicated surge suppressors. Check manufacturer specifications for built-in protection features.
7) Can multiple devices be powered from one 631 series unit?
Yes, you can power multiple devices provided total current draw stays under 1.5 amps. Use proper distribution blocks or terminal strips. Calculate each device's current requirement before connecting.
8) What are the typical dimensions of this power supply?
Dimensions vary by specific model within the 631 series. Most are compact designs suitable for standard electrical boxes. Verify exact measurements from manufacturer specifications before ordering enclosures.
9) How do you test the SDC 631 series power supply output?
Use a digital multimeter to measure DC voltage at output terminals. Voltage should be within 5% of rated output under load. Check both no-load and full-load conditions during testing.
10) Are there higher amperage versions in the SDC series?
SDC offers various amperage ratings across their power supply line. Browse our SDC products section for 2.5 amp, 5 amp, and higher capacity models for larger installations.
11) What maintenance does this power supply require?
Keep unit dust-free and ensure ventilation openings remain clear. Check mounting hardware periodically. No internal maintenance required. Replace unit if output voltage becomes unstable or drops significantly under load.
How fast can I get the SDC 631RFL delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the SDC 631RFL come with a warranty?
Absolutely. The SDC 631RFL is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the SDC 631RFL?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the SDC 631RFL from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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