Siemens SIRIUS 3RV2 Circuit Breaker for Transformer Protection 4.5-6.3A, 3-Pole, Screw Terminals, 690V AC 3RV24111GA10

This Siemens circuit breaker is specifically tailored for transformer protection, offering a thermal overload release adjustable from 4.5 A to 6.3 A. Its fixed instantaneous short-circuit release at 82 A ensures rapid response to fault currents, protecting sensitive transformer windings. The compact S0 size and 3-pole design make it suitable for industrial control panels where space is at a premium.

Highlights

• Adjustable thermal overload release: 4.5 – 6.3 A
• Fixed instantaneous short-circuit release: 82 A
• 3-pole switching for three-phase systems
• Screw terminals for secure wiring
• High short-circuit breaking capacity: 100 kA at 400 V AC

In daily use

Mount the breaker on a standard 35 mm DIN rail or screw it directly to a panel. Set the thermal release to match the transformer's rated current, and the breaker will provide reliable protection against overloads and short circuits. The IP20 degree of protection is intended for installation in an enclosure.

Full specifications

• Series: SIRIUS 3RV2
• Size: S0
• Rated operational voltage: up to 690 V AC
• Rated insulation voltage: 690 V
• Rated impulse withstand voltage: 6 kV
• Short-circuit breaking capacity at 400 V AC: 100 kA
• Short-circuit breaking capacity at 690 V AC: 2 kA
• Trip class: CLASS 10
• Connection type: screw terminals
• Mounting: 35 mm DIN rail or screw mounting
• Degree of protection: IP20
• Operating temperature: -20 to +60 °C
• Standards: IEC 60947-2, IEC 60947-4-1
• Electrical service life: 100,000 switching cycles
• Mechanical service life: 10,000,000 switching cycles

Final note

Engineered for reliable transformer protection, this breaker combines adjustable thermal settings with high breaking capacity in a compact footprint.