Siemens 3RV1901-1AB1 Auxiliary Contact Block

Product Description

The SIEMENS 3RV1901-1AB1 is a side-mounted auxiliary contact block designed for use with Siemens 3RV1 series motor starter protectors and circuit breakers. It expands the signaling and control capabilities of the base device by adding auxiliary switching contacts without occupying space in the main current path. Electricians and industrial controls technicians install this accessory to enable status indication, remote monitoring, or interlocking functions in motor control circuits. The unit ships one per pack and measures 1.181 inches long by 1.181 inches wide by 0.984 inches tall, making it a compact addition to existing assemblies.

This auxiliary contact block is suited for industrial and commercial electrical panel builds, motor control centers, and machine control applications where supplemental contact points are needed alongside a motor protective circuit breaker. It mounts directly to the side of compatible 3RV1 series devices, allowing integration without additional DIN rail space. Typical installations include conveyor systems, pump panels, HVAC equipment control panels, and general-purpose motor starters where auxiliary signaling contacts are required by the control logic.

Key Features

• Side-mount design attaches directly to compatible 3RV1 series devices without additional hardware
• Compact footprint at 1.181 x 1.181 x 0.984 inches fits tight panel layouts
• Lightweight construction at 0.099 pounds minimizes added load on the host device
• Adds auxiliary switching contacts for status indication or interlocking functions
• Ships as a single unit ready for installation

Compatibility

Designed as an OEM-style side-mounted auxiliary contact accessory for use with Siemens 3RV1 series motor starter protectors and motor protective circuit breakers.

Installation Notes

Installation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and any applicable local codes. De-energize and lock out the host device before attaching or removing the auxiliary contact block. Snap the block firmly onto the side attachment point of the host device before making any control wiring connections. Verify contact ratings are appropriate for the control circuit voltage and current before placing the assembly back in service.

Technical Specifications

• Mount Type: Side-mounted
• Dimensions (L x W x H): 1.181 inches x 1.181 inches x 0.984 inches
• Weight: 0.099 pounds
• Quantity per Pack: 1
• UPC: 75455495239

Standard Information

• Brand: SIEMENS
• Manufacturer Part Number: 3RV1901-1AB1