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A156.35 - 2020 Power Supplies for Electronic Access Control

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American National Standard for Power Supplies for Electronic Access Control

Standard ANSI/BHMA A156.35-2020 establishes performance requirements for power supplies specifically designed for use with electronic access control hardware and related electrical components to distribute power. Products are required to meet minimum performance criteria and given an energy efficiency rating.

BHMA has created this series of Hardware Highlights to provide useful, accessible information about builders hardware for anyone with an interest in devices that hang, control, secure, and trim the doors. BHMA is the trade association which represents almost all of the North American manufacturers of builders hardware. One of its main activities since 1983 has been the development and maintenance of ANSI-approved standards for over 40 separate product categories.

Product Performance: Purchasers of this Standard ( can be assured products will perform to their expectations.

Below are an explanation and some examples of the evaluations conducted for certification:


Power Supplies shall meet the requirements of one or more of the following, UL294 Standard for Access Control System Units, UL603 Standard for Power Supplies for Use with BurglarAlarm Systems, or UL2610 Standard for Commercial Premises Security Alarm Units and Systems


The efficiency is evaluated and declared by measuring the Input and Output Power when the power supply is loaded at 20%, 50%, and 100% of the manufactures stated output capability


The response time of the power supply to compensate for instantaneous load changes to the output is another evaluation performed at each output voltage setting (all user available outputs at all possible voltage settings, example: 12V and 24V)

Building Codes

Builders hardware provides several attributes that are essential to building safety and performance, including egress and fire protection. BHMA locksets are designed to comply with all applicable requirements. For example, hardware for fire doors is evaluated and listed to UL 10C by an accredited third-party testing laboratory.


Type Numbers are shown in the following format:

This document is not a substitute for the full standard. Refer to the entire standard for full information.

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Participate in the BHMA® Certification Program by voluntarily submitting a hardware product to independent laboratory testing to confirm that it fully meets the criteria of the appropriate ANSI/BHMA® standard.  This industry-wide certification program does not call for a manufacturer to be a BHMA® member in order to certify its products.

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