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Siemens 3TX7402-3S RC Element Surge Suppressor

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ManufacturerSiemens

Part number3TX7402-3S

Type RC element surge suppressor

Voltage AC 48-127 V (50/60 Hz)

Voltage DC 70-150 V

For Use With Contactors size S0-S2 (3TF40-45, 3TF3, 3TH3, 3TH4, 3TC44)

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RC element surge suppression Integrated cable spacer Mounts to contactor coil terminal Protects contactor coils Wide AC/DC voltage range

Product description

The Siemens 3TX7402-3S is a surge suppressor featuring an RC element with a cable spacer. It's designed for mounting to the coil terminal of contactors size S0-S2, including models like 3TF40 to 3TF45, 3TF3, 3TH3, 3TH4, and 3TC44. It operates within a voltage range of 48-127 V AC (50/60 Hz) and 70-150 V DC, effectively protecting contactor coils from voltage spikes.

This surge suppressor is vital for maintaining the operational integrity of contactor coils in industrial machinery and automation systems. By absorbing transient overvoltages, it prevents premature failure and ensures reliable performance.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3TX7402-3S surge suppressor. We provide quality components at competitive prices, coupled with fast shipping and expert support for your industrial automation needs.

Technical specifications

Type	RC element surge suppressor
Voltage AC	48-127 V (50/60 Hz)
Voltage DC	70-150 V
For Use With	Contactors size S0-S2 (3TF40-45, 3TF3, 3TH3, 3TH4, 3TC44)
Features	Cable spacer, Mounts to coil terminal
Operating Temperature	-25 to +55 °C

Common applications

Motor control

Industrial machinery

Automation systems

Contactor protection

Power distribution

Compatible systems

Siemens contactors size S0-S2 (3TF40-45, 3TF3, 3TH3, 3TH4, 3TC44)

Also known as

Siemens 3TX7402-3S SIRIUS Surge Suppressor

Replaces / compatible with

Compatible with Siemens contactors size S0-S2, including 3TF40...45, 3TF3, 3TH3, 3TH4, and 3TC44.

Technical note

Expert tip

The RC element effectively dampens transient voltages, prolonging the life of the contactor coil and ensuring reliable switching operations.

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Frequently asked questions

Which Siemens contactor sizes is the 3TX7402-3S surge suppressor compatible with?

The Siemens 3TX7402-3S surge suppressor is designed for use with contactors of size S0-S2. This includes specific models like the 3TF40 through 3TF45, as well as the 3TF3, 3TH3, 3TH4, and 3TC44 series.