Siemens 3RT1916-1EH00 Suppression Diode Accessory

Product Description

The SIEMENS 3RT1916-1EH00 is a suppression diode accessory designed to protect contactor and relay coils from voltage spikes generated during switching events. When a coil de-energizes, it produces a flyback voltage pulse that can damage control circuitry. This diode clamps that transient, extending the service life of the coil and connected components. Weighing 0.015 pounds and compact in size, it mounts directly to compatible Siemens 3RT and 3RH series contactors and relays. Electrical contractors and industrial controls technicians install this accessory as part of motor control center builds, panel upgrades, and new contactor installations.

This suppression diode is used in industrial and commercial control panel applications where DC-coil contactors and relays require transient voltage suppression. It is suited for motor starters, control relays, and automation panels in manufacturing, HVAC mechanical rooms, and utility distribution environments. The accessory snaps onto the coil terminals of compatible Siemens contactors, making it a straightforward addition during initial panel assembly or field service.

Key Features

• Suppresses flyback voltage transients on DC contactor and relay coils
• Direct snap-on mounting to compatible Siemens 3RT and 3RH series devices
• Compact footprint: 2.362 inches x 1.181 inches x 0.394 inches
• Lightweight at 0.015 pounds for easy handling and installation
• Extends coil and control circuit service life by clamping inductive kickback

Compatibility

Designed as an OEM-style suppression accessory for Siemens 3RT and 3RH series contactors and control relays with compatible DC coil terminal interfaces. Verify coil voltage and frame size against Siemens product documentation before installation.

Installation Notes

Installation should be performed by a qualified electrician or industrial controls technician in accordance with NEC requirements and the panel manufacturer guidelines. De-energize and lock out the control panel before handling any contactor accessories. The diode is polarity-sensitive on DC coil circuits; confirm correct orientation per the Siemens wiring diagram for the specific contactor model before energizing. Do not install on AC coil contactors unless the Siemens documentation for that device explicitly permits it.

Technical Specifications

• Length: 2.362 inches
• Width: 1.181 inches
• Height: 0.394 inches
• Weight: 0.015 pounds
• UPC: 75455441272

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RT1916-1EH00