3RV2021-1CA20

The Siemens SIRIUS 3RV2021 series 3RV2021-1CA20, S0 frame motor protection circuit breaker has a current setting range of 1.8–2.5A and features dual thermal and electromagnetic trip protection for the motor circuit. It can be equipped with the 3RV2901 series auxiliary contact module to expand signal feedback as needed, making it suitable for use with control panels and production line distribution boxes.

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Siemens SIRIUS 3RV2021-1CA20 Motor Protection Circuit Breaker Product Image

Product Positioning

As a member of the SIRIUS 3RV2021 series, the 3RV2021-1CA20 is an S0 frame motor protection circuit breaker with a current setting range of 1.8–2.5A. The overload action point can be quickly set by rotating the dial, and it is combined with an electromagnetic short-circuit tripping mechanism, making it suitable for motor control panel opening and closing circuits.

Core Product Advantages and Features

Dual protection against overload and short circuit

It uses a thermal heating element to detect overload current and also has an electromagnetic tripping mechanism to deal with instantaneous short circuits. The two protection mechanisms work in tandem.

quick dial calibration on site

The overload action point can be set by rotating the dial and comparing it with the motor nameplate current, allowing for on-site calibration without tools.

Modular signal extension flexibility

It can be equipped with 3RV2901 series auxiliary contact modules to expand the signal feedback function according to the needs of the control panel, offering high configuration flexibility.

Support for collective motor installation applications

Suitable as an on/off/isolation element in a collective motor mounting architecture, it is easy to integrate into existing switchboard configurations.

project	Specification
brand	Siemens
Product Series	SIRIUS 3RV2021
model	3RV2021-1CA20
Frame size	S0
Current adjustment range	1.8–2.5A
Overload trip rating	Class 10
Protection type	Thermal overload protection + electromagnetic short-circuit tripping
Current setting method	Rotating dial (FLA setting)
Auxiliary contacts	Compatible with 3RV2901 series auxiliary contact modules (optional)
Install application	It can be used as an on/off/isolation element for collective motor devices.
Product Type	Manual Motor Starter Protector
Adjustment tools	Pozidriv No. 2 screwdriver

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