Siemens 3SB3902-1EK Accessory Switch 3SB39

Product Description

The SIEMENS 3SB3902-1EK is an accessory switch designed for use with 3SB39 series pushbutton and selector switch assemblies. This contact block-style accessory mounts to compatible operator bodies to add or expand switching capacity within control panel assemblies. It is installed by licensed electricians and control panel builders working on industrial machine control, motor control centers, and automation panels. The 3SB3902-1EK is a compact, lightweight component weighing approximately 0.01 pounds, making it suitable for dense panel layouts where space is at a premium.

This accessory switch is intended for industrial control applications where 3SB39 series pushbutton stations, selector switches, or similar operator devices require additional contact elements. Typical installations include machine tool panels, conveyor control stations, and industrial automation enclosures. It integrates directly with the 3SB39 operator platform without additional hardware, streamlining assembly during panel build or field retrofits.

Key Features

• Designed for direct integration with 3SB39 series operator assemblies
• Compact and lightweight construction at approximately 0.01 pounds
• Expands or adds switching contacts to existing pushbutton or selector switch stations
• Suited for industrial control panel and machine control applications

Compatibility

Designed as an OEM-style accessory for use with SIEMENS 3SB39 series pushbutton and selector switch operator assemblies in industrial control applications.

Installation Notes

Installation should be performed by a qualified electrician in accordance with applicable NEC requirements and the panel or machine manufacturer guidelines. De-energize and lock out the control panel before installing or replacing any contact block or accessory switch. Confirm proper seating and engagement with the operator body before restoring power. Do not force the accessory into position, as improper mounting can prevent reliable contact operation.

Technical Specifications

• Weight: 0.01 pounds
• UPC: 75455462197

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3SB3902-1EK