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This Siemens 3VA5 series molded-case circuit breaker, part number 3VA5280-5EF31-0AA0, is designed for system protection applications. It features a 3-pole configuration and a rated operational current of 80A, with variations based on ambient temperature.
The breaker operates at a maximum rated operational voltage of 690V AC and 750V DC, with an insulation voltage of 800V. It provides robust protection with a breaking capacity of 35kA at 480V according to UL 489 standards, and up to 85kA at 240V according to IEC 60947.
Key electrical protection functions include overload protection (Ir=63A...80A) and short-circuit protection (Ii=5...10 x In). The overcurrent release is of type TM240 with LI protection function. The mechanical service life is typically 20,000 switching cycles, with electrical endurance varying by voltage and load conditions.
Mechanically, the unit has dimensions of 185mm height, 105mm width, and 83mm depth. It is designed for DIN rail mounting and features a lever actuator type. The breaker is also designated as HACR Type for HVAC applications.
| Qty | Low | High |
|---|---|---|
| 1+ | $0.99 | $0.99 |
Estimated market price range - modelled values for guidance only, not live distributor offers.
The permanent assigned current rating (Iu) is 80A.
The maximum rated operational voltage with AC 50/60Hz is 690V, and with DC it is 750V.
The breaking capacity according to UL 489 at 480V is 35kA.
This circuit breaker has 3 poles.
The mounting type is DIN Rail.
The typical mechanical service life is 20,000 switching cycles.