Siemens SIRIUS 3RT2936-1BD00 Varistor Surge Suppressor for 3RT2 Contactors, 127-240 V AC / 150-250 V DC, Plug-in Front Mounting

Protect your Siemens SIRIUS 3RT2 contactor coils from damaging inductive voltage peaks with the 3RT2936-1BD00 varistor surge suppressor. Rated for 127–240 V AC and 150–250 V DC, it limits overvoltage spikes and extends coil life.

Overview

This plug-in suppressor mounts directly onto the front of SIRIUS 3RT2 contactors in sizes S0, S2, and S3. Its integrated plug ensures a secure electrical connection without additional wiring. The varistor element absorbs high-energy transients, preventing insulation breakdown and contact welding.

What stands out

• Wide operating voltage range: 127–240 V AC / 150–250 V DC
• Direct front mounting on SIRIUS 3RT2 contactors (S0, S2, S3)
• Plug-in design – no tools or extra wiring needed
• Compact varistor suppressor for coil protection
• Operates in ambient temperatures from -25 °C to +60 °C

Technical details

• Suppressor type: Varistor
• Rated operating voltage: 127–240 V AC, 150–250 V DC
• Compatible contactor series: Siemens SIRIUS 3RT2
• Compatible contactor sizes: S0, S2, S3
• Mounting type: Plug-in, front mounting
• Electrical connection: Integrated plug
• Function: Overvoltage limitation / surge suppression
• Application: Protection of contactor coils
• Protection against: Inductive voltage peaks
• Ambient operating temperature: -25 °C to +60 °C
• Storage temperature: -40 °C to +80 °C
• Product family: Industrial Control Components
• Product line: SIRIUS
• Standards compliance: IEC 60947-1, EN 60947-1

Our verdict

A reliable, easy-to-install surge suppressor that integrates seamlessly with Siemens SIRIUS 3RT2 contactors, ensuring long-term coil protection in industrial control systems.