Siemens 3RT2936-1JK00 Varistor Surge Suppressor, 48-127V AC/24-70V DC Original Brand New

Overview

The Siemens 3RT2936-1JK00 is a high-performance, clip-on surge suppressor designed specifically for the SIRIUS 3RT2 series power contactors (sizes S2 and S3, specifically 3RT2.3 and 3RT2.4). This essential accessory uses varistor technology to reliably dampen voltage peaks (switching surges) that can occur when the contactor’s coil is de-energized, protecting the control system and improving the lifespan of the contactor.

Its wide operating voltage range makes it highly versatile: 48-127 V AC (50/60 Hz) or 24-70 V DC. The integrated LED indicator provides a clear, immediate visual status of the control voltage, simplifying diagnostics and maintenance. Its compact, slot-in design ensures easy, tool-free installation without affecting the contactor’s external dimensions.

Key Benefit and Features

• Optimal Protection: Effectively limits overvoltage peaks, protecting sensitive electronics and adjacent components from damage caused by coil switching.
• Wide Voltage Applicability: Single suppressor covers a broad range of both AC (48-127V) and DC (24-70V) control voltages, reducing inventory complexity.
• Easy Diagnostics: The integrated LED provides instant visual confirmation of coil operation, speeding up troubleshooting.
• Space-Saving Installation: Features a clip-on design that inserts directly into the contactor’s existing compartment, maintaining the compact footprint of the SIRIUS modular system.
• Enhanced System Reliability: By mitigating electrical stress on the control circuit, the suppressor contributes to a longer service life for the contactor and overall system stability.
• Genuine Siemens Quality: Ensures compatibility, performance, and durability as part of the trusted SIRIUS family of industrial controls.

Function and Installation

Function: When the contactor coil is de-energized, the collapsing magnetic field induces a high-voltage surge (inductive kickback). The internal varistor acts as a voltage-dependent resistor, shunting this transient voltage peak away from the control circuit, effectively clipping it to a safe level. The LED simultaneously confirms the presence of control voltage.

Installation: The 3RT2936-1JK00 is a simple plug-and-play accessory. It is designed to be easily inserted and clipped directly into the dedicated compartment on the front or side of the compatible SIRIUS 3RT2.3 and 3RT2.4 contactors without the need for tools or complex wiring.

For more industrial control products, including the full range of SIRIUS contactors and accessories, visit turll today and secure your systems with genuine Siemens quality!