3RV2021-1CA16

The 3RV2021-1CA16 is an S0 frame SIRIUS 3RV2021 motor protection circuit breaker. The overload operating current can be set in the range of 1.8–2.5A. Combined with electromagnetic short-circuit instantaneous trip protection, it can be equipped with 3RV2901 series auxiliary contact modules to expand signal feedback as needed. It is widely used for motor control circuit opening and closing and isolation.

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Siemens SIRIUS 3RV2021-1CA16 Motor Protection Circuit Breaker Product Image

Product Positioning

The 3RV2021-1CA16 is a Siemens SIRIUS 3RV2021 series S0 frame motor protection circuit breaker with a current adjustment range of 1.8–2.5A. The rated motor current is set by rotating the dial. It combines thermal overload protection and electromagnetic instantaneous trip short circuit protection, making it suitable for the opening, closing and isolation of motor control circuits.

Core Product Advantages and Features

Thermal-electromagnetic dual protection mechanism

Built-in heating element provides overload protection, and combined with electromagnetic trip element to activate instantly in the event of a short circuit, providing double protection for the motor circuit safety.

Precise setting of the rotating dial

The rotating current dial on the panel allows direct setting of the motor's rated current (FLA), enabling intuitive on-site adjustments and rapid calibration.

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.

Applicable collective motor device design

It can be used as an opening, closing, and isolation element for collective motor installations, making it easy to integrate into the design of distribution panels and motor control boxes.

project	Specification
brand	Siemens
Product Series	SIRIUS 3RV2021
model	3RV2021-1CA16
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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