Siemens 3RT1916-2EC21 Ac Timer Module

Product Description

The SIEMENS 3RT1916-2EC21 is an AC timer module designed to mount directly onto compatible Siemens contactor assemblies. It provides timed-control functionality within motor starter and contactor circuits, allowing precise on-delay or off-delay sequencing in industrial and commercial electrical systems. The module integrates into the contactor block without additional wiring adapters, keeping panel layouts compact and reducing installation time. Licensed electricians and industrial controls technicians are the primary installers for this type of accessory module.

This timer module is suited for use in commercial and light industrial control panels where contactor-based motor starters require timed switching logic. Typical applications include HVAC equipment staging, pump control sequences, compressor start-delay circuits, and other motor-load timing scenarios where a standalone relay timer is not preferred. The snap-on design allows the module to be added to an existing contactor assembly during new installation or field retrofit.

Key Features

• AC-rated timer module for direct contactor mounting
• Compact form factor suits space-constrained control panel installations
• Snap-on accessory design supports field retrofit without rewiring the contactor base
• Provides timed-control sequencing for motor starter and contactor circuits
• Lightweight construction at 0.15 pounds

Compatibility

Designed as an OEM-style accessory timer module for use with compatible Siemens contactor assemblies in commercial and industrial motor control applications.

Installation Notes

Installation of this timer module should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and lock out the control panel before attaching or removing the module from the contactor. Verify that the contactor base is compatible with this accessory before snapping the module into place. Do not force the module onto an incompatible contactor frame, as this can damage the mounting clips and the contactor auxiliary port.

Technical Specifications

• Weight: 0.15 pounds
• Length: 4.14 inches
• Width: 1.78 inches
• Height: 1.97 inches
• UPC: 75455441292

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RT1916-2EC21