SIEMENS SIRIUS 3RV2 Motor Starter Protector 3RV2021-1KA15, 1.1-1.6 A, 690V, 3-pole, Screw Terminals

The SIEMENS 3RV2021-1KA15 is a motor starter protector / circuit breaker from the SIRIUS 3RV2 series, size S00. Its strongest capability is providing reliable thermal-magnetic protection for motors up to 1.6 A, with a short-circuit breaking capacity of 100 kA at 400 V.

Advantages

This device combines overload and short-circuit protection in a compact 3-pole design, suitable for DIN rail or screw mounting. The adjustable thermal release (1.1–1.6 A) and fixed magnetic release (21 A) ensure precise protection for small motors. With screw terminals and IP20 protection, it is easy to install in industrial control panels.

Suitable for

• Protection of three-phase motors up to 1.6 A rated current
• Use as a main or emergency stop switch in control circuits
• Applications requiring high short-circuit breaking capacity (100 kA at 400 V)

Key specifications

• Series: SIRIUS 3RV2, Size S00
• Rated current adjustment range: 1.1–1.6 A
• Short-circuit release current: 21 A (fixed)
• Rated operational voltage: up to 690 V AC
• Number of poles: 3
• Mounting: DIN rail (35 mm) or screw mounting
• Connection: screw terminals
• Degree of protection: IP20
• Operating temperature: -20 to +60 °C
• Rated ultimate short-circuit breaking capacity (Icu) at 400 V: 100 kA

Recommendations

For reliable motor protection in compact installations, the SIEMENS 3RV2021-1KA15 offers proven performance and easy integration. Verify the motor's rated current falls within the adjustable range before commissioning.