SDC 636 Series 6 Amp Regulated...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$964.00
$634.19
SDC SDC 636 Series - 6 Amp Regulated & Filtered Low Voltage Power Supply SDC-636

SDC 636 Series 6 Amp Regulated & Filtered Low Voltage Power Supply with Dual Voltage Selection

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Model: 636RF
$964.00
$634.19

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

$964.00
$634.19
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SDC 636 Series 6 Amp Regulated & Filtered Low Voltage Power Supply with Dual Voltage Selection

Professional Access Control Power Solution

The SDC 636 Series power supply delivers regulated and filtered 12/24 VDC power specifically engineered for electric locks and access control systems. This 6 amp unit features field selectable dual voltage capability with Class 2 output rating, combining switching power supply efficiency with linear power supply inductive load handling. The hybrid design includes isolated battery charging circuit and comprehensive surge protection to ensure reliable operation of connected access control devices.

Professional Features & Benefits

  • 6 Amp Current Capacity: Provides sufficient power for multi-door applications and high-current electric locking devices with reliable performance.
  • Field Selectable Dual Voltage: 12/24 VDC output selection allows adaptation to various system requirements without separate power supply models.
  • Regulated and Filtered Linear DC Power: Clean, stable power output protects sensitive access control components from voltage fluctuations and electrical noise.
  • Class 2 Output Rating: UL-compliant low voltage output ensures safe installation and operation in commercial access control applications.
  • Isolated Battery Charging Circuit: Dedicated charging system with low battery disconnect maintains backup power integrity for emergency operation.
  • Comprehensive Surge Protection: Input and output surge suppression protects connected devices from transients and voltage spikes that cause system failures.
  • Fire/Emergency Release Input: Integrated emergency override capability ensures code-compliant operation during fire alarm or emergency conditions.
  • Visual Status Indicator: LED status display provides immediate system status feedback for troubleshooting and maintenance.

Technical Specifications

  • Commercial/Residential: Commercial
  • Current: 6A
  • Department: Door Hardware
  • Electronic: Yes
  • PDF:SDC Full Catalog: https://zensupply.com/content/pdf/lcn/CondensedHardwareBrochure
  • Product Category: Electronic Access Controls
  • Product Group: Electronic Access Controls
  • Product Model: 636RF
  • Product Subgroup: Controllers, Power Supplies and Transformers
  • Product Type: Power Supplies
  • Product Voltage: 120V
  • Series: 636 Series
  • Subcategory: Power Supply

Professional Applications

  • Commercial Building Security Systems
  • Multi-Door Access Control Installations
  • Healthcare Facility Access Control
  • Educational Institution Safety Systems
  • Industrial Facility Monitoring
  • Government and Municipal Buildings
  • Fire & Life Safety Equipment Integration

Why Choose SDC Quality?

SDC power supplies feature hybrid design technology that combines switching power supply efficiency with linear power supply inductive load handling capability, specifically developed to address the unique power requirements of access control systems. With UL 294 Access Control System Units and UL 603 Power Supplies certifications, this unit delivers professional-grade reliability with comprehensive surge protection and regulated output. Engineered to reduce the 75-85% of access control operating problems attributed to power issues, ensuring dependable performance in demanding commercial applications.

Manufacturer Resources

SDC Full Catalog

Product Specs

Subcategory:
Power Supply
Series:
636 Series
Product Group:
Electronic Access Controls
Product Subgroup:
Controllers, Power Supplies and Transformers
Commercial/Residential:
Commercial
Product Type:
Power Supplies
Electronic:
Yes
Current:
6A
Product Model:
636RF
Product Voltage:
120V
Product Category:
Electronic Access Controls
Department:
Door Hardware

SDC 636RF – Frequently Asked Questions

1) How many electric strikes or maglocks can I run off a 6 amp SDC 636 power supply?
The 636 Series is rated 6 A of continuous regulated output, so the honest way to size it is to add the holding or inrush current of every lock on the circuit and stay under 6 A at your selected voltage. Maglocks draw continuously, so they consume that budget all day; strikes and electrified exit device latch retraction pull hard only when they fire, so simultaneous release is the case to size for. Distributing it to individual doors needs a relay module: the XFB4 multiple fused output relay, the XCR4 four station control relay, or an XUR controller in two, four, or eight relay versions.
2) What do I need to add to an SDC 636 to control individual doors, and is a control module required on the order?
A door control module choice is part of ordering the 636 Series, and None (Standard) is a valid pick if you just want raw power. Beyond that: XUR-1, XUR2-4 and XUR4-8 are microprocessor controllers with two, four and eight relays; XFB4 gives multiple fused outputs; XCR4 is a four station control relay; XACM-1 is a six station input control relay; and XEMC is an exit device sequencer for openings where an exit device has to release before an automatic operator or another device fires. Pick by how many doors and how much sequencing logic the opening needs.
3) Does the SDC 636 work on 230 VAC, or is it 120 volt only?
Standard input on the 636 Series is 120 V, and a 230 VAC 50/60 Hz version is a build option. Specify the 230 VAC option for export or overseas installations; leave it off for standard North American 120 V service. It is chosen at order time, not switched in the field, so get it right on the purchase order.
4) Can a power supply for access control be tied into the fire alarm so locks release?
Yes, the SDC 636 Series has a fire/emergency release input built in, which drops power to the connected locking devices when the alarm panel signals. You can also order it with a manual reset switch, so the supply stays down until someone deliberately restores it rather than re-locking the moment the alarm clears. That reset behavior is what a lot of AHJs want on delayed egress and stairwell openings, and it is an ordering option, not a field add.
5) I need a 6 amp 12/24 volt power supply for delayed egress devices. What are my options besides the SDC 636?
The closest match on capacity is the BEST PS161-6, which is a 120 V input, 12/24 V output, 6 A supply intended for delayed egress exit devices. Below that tier, the Von Duprin PS902 base power supply is 2 A at 12/24 VDC field selectable, and the RCI DKPS-2A gives 12/24 VDC at 2 A with eight outputs already broken out. If you need more current at a single voltage, the Altronix AL1024ULACMCB is 24 VDC at 10 A with eight PTC outputs and access power control built in, and the Securitron AQS1210 is 12 VDC at 10 A. The 636 differentiates on the field selectable dual voltage plus fire release input in one 6 A box.
6) Is the SDC 636 UL listed for access control, and is the output Class 2?
The 636 Series carries UL 294 Access Control System Units and UL 603 Power Supplies certifications, and the output is Class 2 rated. That combination is what most specs and inspectors are looking for on a commercial access control power supply, and Class 2 output is what allows the low voltage wiring methods on the lock side.
7) What is the closest equivalent to the SDC 636 power supply from another brand?
The BEST PS161-6 is the nearest match in the group. Like the SDC 636, it takes a 120V input and puts out 12/24V at 6A capacity, so it covers the same current budget for a multi-door access control run. The BEST unit is described for delayed egress exit devices, while the SDC 636 is a regulated and filtered 12/24 VDC supply with a field selectable dual voltage output, an isolated battery charging circuit with low battery disconnect, and a fire/emergency release input.
8) I only need to power one or two electric strikes - is there a smaller power supply than the 6 amp SDC 636?
Yes. For a single opening or a small pair, the Von Duprin PS902 base power supply gives 2A at 12/24 VDC field selectable, and the RCI DKPS-2A gives 12/24VDC at 2A with 8 outputs for distributing to several devices. The Adams Rite PS-1 is a 1 amp 12/24 volt DC regulated supply with battery backup. All three hold the same dual 12/24 VDC selection as the SDC 636, at a fraction of its 6A capacity.
9) What should I use instead of the SDC 636 if my locks need more than 6 amps at 24 volts?
Step up to the Altronix AL1024ULACMCB, a power supply and access power controller with 24VDC at 10A from a 115VAC 60Hz input at 4.2A, with 8 PTC outputs and a grey enclosure. If the load is 12 volt rather than 24, the Securitron AQS1210 is a switching power supply rated 12 VDC at 10 Amp. The SDC 636 tops out at 6A, though it holds field selectable 12/24 VDC on one unit where the AQS1210 is 12 VDC only.
10) Does the SDC 636 support battery backup for access control doors during a power outage?
An isolated battery charging circuit with low battery disconnect is part of the 636 Series design, so batteries can be added for standby operation and the disconnect prevents them being drained flat. The charging circuit is isolated from the main output, which keeps charging current off the lock circuit.
11) Should I use a switching power supply or a linear one for electric locks?
Electric locks and strikes are inductive loads, and that is what decides it. Switching supplies are efficient and compact but can behave badly with inductive kickback; linear supplies handle it better but run hotter and bigger. The SDC 636 Series uses a hybrid design that pairs switching efficiency with linear inductive load handling, so you are not choosing between them. If you want a straight switching unit for a small job, the Securitron AQD1 is 12/24 VDC at 1 A and the AQL4 is 12/24 VDC at 4/3 A; for a straight linear unit, Command Access PS1 is 24 VDC at 1 A and the PS204/204B is 2 A at 24 VDC with battery backup.
12) Can I lock the power supply cabinet so tenants or staff cannot kill power to the doors?
A key lock cover is an available build option on the 636 Series, which is the usual requirement in multi-family, school and hospital corridors where the enclosure sits somewhere public. You can also specify where the power on/off switch lives: inside the cabinet enclosure, on the cabinet cover, or omitted entirely. Switch on the cover is convenient for service; inside the cabinet, behind a key lock cover, is the tamper-resistant combination.
13) What is the difference between the SDC 636 and a small plug-in power supply for one door?
Scale and integration. The 636 is a 6 A enclosed commercial unit with a fire release input, battery charging and optional relay modules, sized for multi-door systems. For a single strike on a small job, a plug-in unit like the ROFU 9126T at 12 VDC 1.5 A with time delay does the job with no enclosure to mount, and the Adams Rite PS-1 is a 1 A 12/24 VDC supply with battery backup. Going the other direction, if one door needs sequencing logic rather than more current, the Detex 10-800 universal logic controller pairs 120 VAC/24 VDC power with battery backup and control logic.
14) Is the SDC 636 the right power supply for motorized latch retraction exit devices?
Latch retraction pulls a heavy inrush every time the device fires, and the 636 Series is built for inductive loads at 6 A with an XEMC exit device sequencer available when the release order matters. That said, motor retraction supplies are often specified as a matched pair with the device: the BEST RPSMLR2 is built specifically for motorized latch retraction exit devices, and the BEST ELR150 is a control module for electric latch retraction. If the exit device manufacturer names a required supply on the submittal, follow the submittal.
15) Is a switching power supply like the Securitron AQL4 the same thing as the SDC 636?
They are built differently. The Securitron AQL4 is a switching power supply rated 12/24VDC at 4/3Amp, and the AQD1 is a switching supply at 12/24 VDC 1 Amp. The SDC 636 uses a hybrid design that combines switching power supply efficiency with linear power supply inductive load handling, and delivers regulated and filtered linear DC power at 6A. On inductive loads such as magnetic locks and solenoid strikes, that construction difference is the thing to check before treating one as a drop-in for the other.
16) What looks like a substitute for the SDC 636 but will not actually power my access control doors?
Two items in the same family are not full door power supplies. The ROFU 10305-LA/10306-LA is a power transfer hinge rated 1.5A at 42V with a tamper resistant plastic white finish - it carries power through the door edge rather than generating it. The Command Access CAT Field Tester is a 12-24VDC portable power supply that runs off DeWalt, Makita and Milwaukee batteries, built for bench and field testing rather than permanent installation. The SDC 636 is the 120V input, 6A regulated and filtered supply that feeds the system itself.
17) I need multiple switched outputs and door logic - does the SDC 636 do that, or should I look at a controller?
Both routes exist. The Detex 10-800 Series is a universal logic controller with a 120VAC/24VDC power supply and battery backup, and the Altronix AL1024ULACMCB combines a power supply with an access power controller and 8 PTC outputs. The SDC 636 reaches the same territory through add-on modules: the XUR-1 two relay, XUR2-4 four relay and XUR4-8 eight relay microprocessor controllers, plus the XFB4 multiple fused output relay and the XCR4 four station control relay, all fitted inside the same 6A supply.
18) Is a plug-in transformer enough for an electric strike, or do I need an enclosed supply like the SDC 636?
The ROFU 9126T is a plug in mini power supply, 12 VDC at 1.5A with time delay, and the Command Access PS1 is a 24VDC linear power supply with 1 amp output - both suit a single low draw device. The SDC 636 is a cabinet enclosure unit at 6A with an isolated battery charging circuit, input and output surge suppression and a fire/emergency release input, and it can be ordered with a key lock cover and a power on/off switch either inside the cabinet or on the cover, which is what specifications for healthcare, education and government facilities usually call for.
19) I want battery backup on my access control power - which supplies include it?
The Command Access PS204/204B is a linear power supply with 2A at 24VDC and battery backup, the Adams Rite PS-1 is a 1 amp 12/24 volt DC regulated supply with battery backup, and the Detex 10-800 Series controller carries a 120VAC/24VDC supply with battery backup. The SDC 636 handles backup through an isolated battery charging circuit with low battery disconnect at its 6A rating, so the standby batteries stay maintained without dragging the output down.
20) My run has no AC service at the door - what do I use instead of a 120V power supply?
The Securitron BPSS is a boxed solar power supply, which is the option when there is no building AC at the location. The SDC 636 needs a 120V input, or the 230 VAC 50/60 Hz version, so it belongs on an opening with utility power available.
21) Will an SDC 636 power supply protect my access control boards from surges and voltage spikes?
Surge suppression is on both the input and the output of the 636 Series, and the DC output is regulated and filtered, so connected readers, controllers and locks see clean voltage rather than the noise an unfiltered supply passes through. Regulation matters most on long lock runs where voltage sags under inrush.
22) What is the difference between a power supply control module and a full power supply for access control?
The BEST ELR150 Series is a power supply control module for electronic access control - a module that manages power rather than a standalone supply, and the Locknetics LP Series 150 and 250 is a power supply with enclosure. The SDC 636 is the complete unit: a 120V input, 6A regulated and filtered 12/24 VDC supply in a cabinet enclosure, with control modules such as the XUR-1 or XACM-1 six station input control relay added inside it as ordered.
How fast can I get the SDC 636RF 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 636RF come with a warranty?
Absolutely. The SDC 636RF 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 636RF?
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
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