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The Siemens 3VA5120-5EC31-0AA0 is a 3-pole molded-case circuit breaker designed for system protection. It features a permanent rated current of 20A and a maximum rated operational voltage of 690V AC or 500V DC. The breaker is built on the UL frame size 125 and offers a breaking capacity of 35kA at 480V according to UL 489 standards, and 55kA at 415V according to IEC 60947 standards.
This circuit breaker utilizes the TM230 overcurrent release with LI protection function. It has a mechanical service life of typically 15,000 switching cycles and electrical endurance ratings of 8,000 cycles at 380/415V and 4,000 cycles at 690V. The unit is designed for DIN rail mounting and has dimensions of 140mm height, 76.2mm width, and 76.5mm depth.
Key electrical specifications include adjustable response current settings for short-circuit protection from 7.5 to 15 times the rated current. It also meets HACR Type requirements as per UL 489. The breaker has a maximum power loss of 12W.
| 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 50/60Hz and 500 V DC.
The permanent rated current (Iu) is 20 A, with an operational current of 20 A at 40°C and 45°C.
The breaking capacity according to UL 489 is 35 kA at 480 V.
This circuit breaker is designed for DIN rail mounting.
The RoHS status is RoHS3 Compliant.