3RT1936-1CD00

The Siemens SIRIUS S2 and S3 size contactor uses an RC surge absorber, which is compatible with AC 127 to 240V or DC 150 to 240V coil circuits. It is installed on the contactor coil terminals and can reduce the interference and impact of surges on surrounding control components during power failure.

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Siemens 3RT1936-1CD00 SIRIUS contactor RC surge absorber 127-240V

Product Positioning

The 3RT1936-1CD00 is an RC surge absorber suitable for Siemens SIRIUS large series S2 and S3 size contactors, supporting AC 127 to 240V or DC 150 to 240V coil voltage range. This component is directly locked to the contactor coil terminals, using a combination of resistor and capacitor to absorb the surge voltage generated when the coil is de-energized, reducing the risk of interference and damage to PLC output modules or nearby relays. It is a common protective accessory for stable operation of control panels.

Core Product Advantages and Features

RC absorbs surge

The resistor-capacitor combination absorbs the induced voltage at the moment the coil is de-energized.

Corresponding high voltage circuit

Applicable to AC127~240V and DC150~240V coils

Directly locked to the coil terminals

Installation takes up no extra space and construction is quick.

Protect surrounding components

Reduce the impact of surge waves on PLC output points and relay contacts.

Applicable to S2 and S3 sizes

Covering two common SIRIUS large contactor frames

project	Specification
Product Type	RC surge absorber (resistive-capacitive element)
Applicable voltage	AC 127~240V / DC 150~240V
Applicable contactor size	S2, S3 (3RT103, 3RT104 series)
Installation method	Directly mounted on the contactor coil terminals
net weight	Approximately 30.7 g

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3RT1936-1TR00

The Siemens SIRIUS S2 and S3 size contactor diode surge suppression assembly is designed for DC 24V coil circuits. It does not include an LED indicator and is installed at the bottom of the contactor. It can absorb back EMF surges when the coil is de-energized, protecting nearby relays and electronic components for safe operation.

3RT1936-1CC00

RC surge absorbers for Siemens SIRIUS S2 and S3 size contactors are compatible with AC 48 to 127V or DC 70 to 150V coil circuits. They are installed on the coil terminals to absorb surge voltage during power outages. They are suitable for switchboard designs using medium voltage control circuits and PLC output modules.

3RT1936-1CB00

The Siemens SIRIUS S2 and S3 size contactor RC surge absorber is designed for AC 24 to 48V or DC 24 to 70V low voltage coil circuits. It weighs approximately 0.027kg and is installed on the coil terminals to suppress power outage surges. The original manufacturer has discontinued production of this product, and the recommended replacement model is 3RT2936-1CB00.