The SDC 420 Series Push Button Switches provide a durable, highly visible solution for manual door release and access-controlled egress applications. Featuring a large 2-inch illuminated push button, these switches are designed for easy activation and quick identification in commercial buildings, offices, and other facilities requiring reliable door-release controls.
Built with high-impact-resistant materials, the SDC 420 Series is engineered to withstand frequent use in demanding commercial environments. Large EXIT or PUSH TO EXIT signage helps occupants quickly locate the release switch when needed. The series offers multiple operating configurations, including momentary, timed, pneumatic, and alternate-action switches, providing flexibility for a variety of access control system requirements.
The 422A model is designed for ADA-related access and egress applications. For access-controlled egress systems requiring both manual release and motion sensing, the 423MN exit switch, when used with the compatible MD-31D motion sensor, supports the applicable code requirements for manual releasing devices and sensor devices.
Key Features
2-inch illuminated push button for easy activation and high visibility.
High-impact-resistant construction for durability in commercial applications.
Large EXIT or PUSH TO EXIT signage for clear identification.
Multiple switching configurations to accommodate different door-release requirements.
Timed and pneumatic options for flexible system operation.
ADA-related application support with the 422A model.
Compatible sensor integration for applicable access-controlled egress installations.
Available Models
422 – Momentary (MO), SPDT
423 – Electronic timer, adjustable
423M – Electronic timer, fixed
423P – Pneumatic timer, adjustable
424 – Momentary (MO), DPDT
425 – Alternate action (AA), On/Off
Code Compliance
The 423MN exit switch used with the MD-31D motion sensor is identified for access-controlled egress applications addressing manual releasing device and sensor requirements under the following referenced codes:
IBC International Building Code – Section 1008.1.3.4
IFC International Fire Code – Section 1008.1.3.4
NFPA 101 Life Safety Code – Section 7.2.1.6.2
NFPA 1 – Section 15.5.3.2
BOCA National Building Code – Section 1017.4.5
SBCCI Standard Building Code – Section 1012.7
Verify the applicable code edition, local requirements, and complete system configuration with the authority having jurisdiction (AHJ) before installation.
Applications
The SDC 420 Series is suitable for commercial door-release and access control installations, including:
