3RV2021-4CA20

The SIRIUS 3RV2021-4CA20 is an S0-cased three-pole motor protection circuit breaker with an adjustable overload current range of 16-22A, a rated insulation voltage of 690V, a spring-loaded terminal block design, and an IP20 protection rating. It can be combined with a contactor to form a direct starter and is suitable for overload and short-circuit protection applications of three-phase motors in factory automation production lines.

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Siemens SIRIUS 3RV2021-4CA20 Motor Protection Circuit Breaker 16-22A

Product Positioning

The SIRIUS 3RV2021-4CA20 is a Siemens S0 case motor protection circuit breaker with an adjustable overload current range of 16-22A, providing stable and reliable overload and short-circuit protection for three-phase motors.

Core Product Advantages and Features

Adjustable current range: 16-22A

The rotary scale allows for fine-tuning of the trip value according to the actual rated current of the motor, improving protection accuracy.

Spring-loaded terminal blocks

Tools are no longer needed to quickly crimp wires, reducing wiring and maintenance time.

S0 compact housing design

It is compact in size, saves control panel wiring space, and is easy to combine with contactors to form a starter.

IP20 protection rating

Provides basic electric shock protection and is suitable for installation in general control panel environments.

project	Specification
model	3RV2021-4CA20
Casing size	S0
Extreme number	3 poles
Overload current adjustable range	16-22 A
Rated current	22 A
Instantaneous trip current (N-release)	Approximately 286 A
Rated insulation voltage	690 V AC
Terminal block type	Spring-type terminals
Break away from level	Class 10
Protection level	IP20
Rated ultimate short-circuit breaking capacity Icu (400V)	55 kA
Rated short-circuit breaking capacity Ics (400V)	25 kA

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