Siemens SENTRON 3VA2 series, Molded case circuit breaker, 3VA2450-5KQ42-0AA0, 4-pole, 500 A, ETU860 electronic trip, 187 kA at 240 V.
| Parameter | Value |
|---|---|
| Product designation | Molded case circuit breaker |
| Brand / range | SENTRON |
| Product version | Line protection |
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Current at 40 °C | 500 A |
| Current at 45 °C | 500 A |
| Current at 50 °C | 500 A |
| Current at 55 °C | 477 A |
| Current at 60 °C | 455 A |
| Current at 65 °C | 432 A |
| Current at 70 °C | 410 A |
| Switching capacity class | M |
| Breaking capacity at 240 V | 187 kA |
| Breaking capacity at 415 V | 121 kA |
| Breaking capacity at 440 V | 121 kA |
| Breaking capacity at 500 V | 75.6 kA |
| Breaking capacity at 690 V | 9 kA |
| Power loss, max. | 99 W |
| Parameter | Value |
|---|---|
| Overcurrent release (trip unit) type | ETU860 |
| Overcurrent protection function | LSIG |
| Ground-fault monitoring | Summation current formation L + N conductor |
| Parameter | Value |
|---|---|
| Main circuit connection type | on both sides nut keeper kit |
| Main circuit connector arrangement | Front terminal |
| Protection class (IP), front | IP40 |
| Parameter | Value |
|---|---|
| Undervoltage release | No |
| Voltage trigger | No |
| Trip indicator | No |
| Communication function | Yes |
| Measurement function | Yes |
| 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 3VA2450-5KQ42-0AA0: Interrupting rating drops with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 9 kA at 690 V. The 6 kA limited-to-1-second rating is a thermal withstand for coordination studies, not a switching rating.
Above that, derate: 477 A at 55 °C, 455 A at 60 °C, 432 A at 65 °C, 410 A at 70 °C.
The ETU860 electronic trip unit, which provides adjustable long-time, short-time, instantaneous, and ground-fault protection curves, plus communication capability.
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