Siemens 3VA5120-5ED21-0AA0

The 3VA51 circuit breaker is designed for low voltage applications, featuring a medium breaking capacity (Class M) suitable for various operational environments. With a rated current of 20A and capable of withstanding a short-circuit breaking capacity of 35kA at 480V, this device ensures reliable line protection. The thermal-magnetic trip unit, designated as TM210, offers fixed overload protection at 20A (Ir) and short-circuit protection set at 15 times the nominal current (Ii).

Constructed without lugs, this molded case circuit breaker is compliant with UL standards and supports a rated voltage of 415V. Its compact dimensions of 2 x 5.5 x 3.7 inches (50.8 x 140 x 76.5 mm) make it suitable for various installation scenarios. The device also has a degree of protection rated at IP40, ensuring operational integrity in typical industrial conditions.

In addition, the circuit breaker features a mechanical service life of approximately 20,000 operating cycles and an electrical endurance of up to 8,000 cycles at 415V. Operating temperature ranges from -25°C to 70°C, while storage conditions tolerate temperatures from -40°C to 80°C, making it versatile for diverse applications. The device is designed for DIN rail mounting, enhancing installation flexibility.