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The Siemens 3VA5145-5EC31-0AA0 is a molded-case circuit breaker designed for system protection. It features a 3-pole configuration and a rated operational current of 45A at 40°C, with a maximum frame size current of 125A.
This circuit breaker operates at a maximum rated operational voltage of 690V AC and 500V DC, with an insulation voltage of 800V. It provides a breaking capacity of 35kA at 480V according to UL 489 standards, and 55kA at 415V according to IEC 60947 standards. The overcurrent release is of type TM230 with LI protection function.
With a mechanical service life of typically 15,000 switching cycles, the 3VA5145-5EC31-0AA0 is built for durability. Its dimensions are 5.5 inches in height and 3 inches in width and depth. The mounting type is DIN Rail, and it features a lever actuator.
Key technical data includes a maximum power loss of 10.2W. The electrical endurance at AC-1 is 8,000 cycles at 380/415V and 4,000 cycles at 690V. Adjustable response current ranges from 32-45A for overload protection (Ir) and 225-450A for short-circuit protection (Ii).
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The maximum rated operational voltage for this circuit breaker is 690 V AC at 50/60 Hz and 500 V DC.
The breaking capacity according to UL 489 at 480 V is 35 kA.
The permanent rated current (Iu) is 45 A, and the operational current at 40°C is also 45 A.
This circuit breaker is designed for DIN Rail mounting.