Siemens, SENTRON, 3VA1 Molded Case Circuit Breaker 3-Pole 63A, Breaking Capacity 25 kA

This moulded case circuit breaker is designed for three-pole line protection in electrical installations. It provides thermal-magnetic overload and fixed short‑circuit protection, and is suitable for AC systems up to 690V and DC systems up to 500V. The device is intended for front‑terminal connection with nut keeper fittings and meets multiple international approvals for integration into standard distribution and control panels.

• 25kA breaking capacity delivers robust short-circuit interruption at 415V
• Type N tripping characteristic ensures selective fault discrimination
• 63A operational current supports steady load duty up to 40°C
• Fixed Ii=10 x In offers permanent short-circuit limitation for protection
• 9000 electrical cycles at 380/415V provides long operational endurance

• Suitable for motor feeder protection in industrial panels
• Ideal for distribution board main incomer switching
• Used for line protection in three-phase control cabinets
• Can be used for AC/DC installations requiring front termination

It uses front terminals with a nut keeper kit on both ends for secure conductor fixing.

Rated operational current is 63A at up to 50°C and de‑rates progressively above 55°C to maintain protection.

Typical mechanical life is 20,000 operating cycles and electrical endurance is 9,000 cycles at 380/415V AC-1.

The overcurrent release provides thermal-magnetic overload protection with adjustable Ir and a fixed I‑trip setting at 10 x In.