3RV2021-1KA20

The Siemens SIRIUS 3RV2021-1KA20 is an S0-size three-pole motor starter protector with a current adjustment range of 9~12.5A. It belongs to a different current frequency range than the 4A series. It is equipped with a 163A instantaneous short-circuit trip and spring-loaded terminals, making it suitable for three-phase motor circuits with lower current.

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Real photos of the Siemens 3RV2021-1KA20 SIRIUS motor starter protector.

Product Positioning

The Siemens SIRIUS 3RV2021-1KA20 is an S0-size three-pole motor starter protector with a current adjustment range of 9~12.5A. It belongs to a different current frequency range than the 4A series and is suitable for motor circuits with smaller currents.

Core Product Advantages and Features

9~12.5A overload adjustable range

The overload current can be adjusted in the range of 9~12.5A, which is more precise than the motor circuit corresponding to the smaller current of the 4A specification in the same series.

163A instantaneous short circuit trip

It has a built-in instantaneous electromagnetic tripping element with a set value of 163A, which can quickly disconnect the circuit when a short circuit fault occurs.

Spring-loaded terminal blocks

Featuring a spring-loaded terminal design, wiring is quick and secure, allowing for tool-free wire securing.

S0 housing, 35mm guide rail mounting

Compact size, conforming to S0 housing size standards, can be directly snapped onto 35mm DIN rails, saving installation space.

project	Specification
brand	Siemens
series	SIRIUS 3RV2021
Product Category	Motor starting protector (motor protection circuit breaker)
Casing size	S0
Extreme number	3P
Current adjustment range	9~12.5A
Instantaneous short circuit trip current	163A
Break away from level	Class 10
Rated operating voltage	Up to 690V AC
Terminal blocks	Spring-type terminals
Protection level	IP20
Installation method	35mm DIN rail
External dimensions (height x width x depth)	Approximately 119 x 45 x 96 mm
Operating ambient temperature	-20°C ~ +60°C

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