3RV2021-1KA15

The Siemens SIRIUS 3RV2021-1KA15 is an S0-size three-pole motor starter protector, belonging to the 1K series. It features Class 10 tripping characteristics and IP20 protection rating. Its compact size allows it to be directly clipped onto a 35mm DIN rail, making it suitable for overload and short-circuit protection in three-phase motor circuits.

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Siemens 3RV2021-1KA15 SIRIUS Motor Starter Protector Product Image

Product Positioning

The Siemens SIRIUS 3RV2021-1KA15 is an S0 size three-pole motor starter protector, belonging to the 3RV2021 series 1K specification model, and is suitable for overload and short circuit protection applications of three-phase motors.

Core Product Advantages and Features

S0 standard casing design

It adopts the S0 standard housing size, is compact and easy to install in control boxes or distribution panels with limited space.

Class 10 Breakthrough Level

It complies with the Class 10 trip characteristics of IEC/EN 60947-4-1 standard, providing a stable and reliable protection response under overload conditions.

IP20 protection rating

The main body has an IP20 protection rating and is suitable for installation in general industrial distribution boxes.

35mm DIN rail mounting

It can be directly snapped onto a 35mm standard DIN rail, and can be fixed and installed without additional accessories.

project	Specification
brand	Siemens
series	SIRIUS 3RV2021
Product Category	Motor starting protector (motor protection circuit breaker)
Casing size	S0
Extreme number	3P
Rated operating voltage	Up to 690V AC
Break away from level	Class 10
Protection level	IP20
Installation method	35mm DIN rail
Operating ambient temperature	-20°C ~ +60°C

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