Siemens SENTRON 3VA molded case circuit breaker, 3VA1450-6FF42-0AA0, 250 A, 4-pole, TM240 thermal-magnetic release, line protection design, IP40 front.
| Parameter | Value |
|---|---|
| Product designation | Molded case circuit breaker |
| Brand / range | SENTRON |
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Rated operational voltage Ue (AC) | 690 V |
| Rated insulation voltage Ui | 800 V |
| Current at 40 °C | 500 A |
| Current at 45 °C | 500 A |
| Current at 50 °C | 500 A |
| Current at 55 °C | 488 A |
| Current at 60 °C | 476 A |
| Current at 65 °C | 464 A |
| Current at 70 °C | 452 A |
| Switching capacity class | H |
| Breaking capacity at 240 V | 220 kA |
| Breaking capacity at 415 V | 154 kA |
| Breaking capacity at 440 V | 154 kA |
| Breaking capacity at 500 V | 121 kA |
| Breaking capacity at 690 V | 17 kA |
| Power loss, max. | 122.7 W |
| Parameter | Value |
|---|---|
| Overcurrent release (trip unit) type | TM240 |
| Overcurrent protection function | LI |
| Ground-fault monitoring | Without |
| Grounding protection function | No |
| Parameter | Value |
|---|---|
| Main circuit connection type | nut keeper kit on both ends |
| Main circuit connector arrangement | Front terminal |
| Protection class (IP), front | IP40 |
| Parameter | Value |
|---|---|
| Undervoltage release | No |
| Voltage trigger | No |
| Trip indicator | No |
| Communication function | No |
| Measurement function | No |
| Motor drive option | Yes |
| Auxiliary CO contacts | 0 |
| Parameter | Value |
|---|---|
| Operating temperature, max. | 70 °C |
| Operating temperature, min. | -25 °C |
| Storage temperature, max. | 80 °C |
| Storage temperature, min. | -40 °C |
| Parameter | Value |
|---|---|
| Mechanical service life (operating cycles), typ. | 20 000 |
| Height | 248 mm |
| Width | 184 mm |
| Depth | 110 mm |
| Height (in) | 9.76 in |
| Width (in) | 7.24 in |
| Depth (in) | 4.33 in |
The interrupting ratings span the voltage range: 220 kA at 240 V, 154 kA at 415 V and 440 V, 121 kA at 500 V, and 17 kA at 690 V — so it handles high-fault-capacity service entrances on the low end and still clears moderate faults on 690 V circuits.
That's the figure to use for NEC conductor sizing. Stack several of these in a sealed cabinet and the internal temperature rise will eat into your headroom.
Height is 248 mm, width is 184 mm, depth is 110 mm.
No, it uses a TM240 thermal-magnetic release — fixed thermal pickup at 240 A, factory-set magnetic instantaneous trip. No field-adjustable electronic trip unit.
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