SIEMENS 3TX7402-3T RC-elementti ylijännitesuoja, 127-240V AC / 150-250V DC, SIRIUS-kontaktoreille

In industrial control panels, contactor coils generate voltage spikes when switched off. The SIEMENS 3TX7402-3T RC element absorbs these spikes, protecting sensitive electronics and extending contact life. It plugs directly into SIRIUS contactors from the 3RT2, 3RT1, 3RH2, and 3RH1 series.

Key specifications

• Suppressor type: RC element (snubber)
• Rated operating voltage: 127-240 V AC, 150-250 V DC
• Function: surge damping / voltage peak suppression
• Compatibility: Siemens SIRIUS contactors (3RT2, 3RT1, 3RH2, 3RH1)
• Mounting: plug-in
• Circuit configuration: resistor-capacitor (RC)
• Application: protection of inductive loads (e.g., contactor coils)
• Ambient operating temperature: -25 to +60 °C
• Storage temperature: -40 to +80 °C
• Degree of protection: IP20 when mounted
• Standards: IEC 60947
• Product series: Siemens SIRIUS

Why choose it

This suppressor reduces electromagnetic interference and prevents voltage peaks that can damage control equipment. Its compact plug-in design allows quick installation without additional wiring.

Ideal use cases

• Protecting contactor coils in motor control circuits
• Reducing EMI in automation panels
• Extending the life of switching devices

Good to know

The RC element is designed for use with Siemens SIRIUS contactors and meets IEC 60947 standards. It operates reliably in a wide temperature range, making it suitable for various industrial environments.