Siemens SENTRON 3VA2225-5HN32-0AJ0, molded case circuit breaker, 3-pole, 250 A, ETU350 electronic trip unit, line protection, 187 kA at 240 V.
| Parameter | Value |
|---|---|
| Product designation | Molded case circuit breaker |
| Brand / range | SENTRON |
| Product version | Line protection |
| Basic switch (supplied) ref. | 3VA2225-5HN32-0AA0 |
| Integrated auxiliary / alarm switch ref. | 3VA9988-0AB11 |
| Parameter | Value |
|---|---|
| Number of poles | 3 |
| Current at 40 °C | 250 A |
| Current at 45 °C | 250 A |
| Current at 50 °C | 250 A |
| Current at 55 °C | 241 A |
| Current at 60 °C | 232 A |
| Current at 65 °C | 222 A |
| Current at 70 °C | 213 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 | 79 kA |
| Breaking capacity at 690 V | 5.1 kA |
| Power loss, max. | 48 W |
| Parameter | Value |
|---|---|
| Overcurrent release (trip unit) type | ETU350 |
| Parameter | Value |
|---|---|
| Main circuit connection type | Lug terminal |
| Main circuit connector arrangement | Front terminal |
| Protection class (IP), front | IP40 |
| Parameter | Value |
|---|---|
| Undervoltage release | No |
| Voltage trigger | No |
| Trip indicator | Yes |
| Communication function | No |
| Measurement function | No |
| Motor drive option | Yes |
| Auxiliary CO contacts | 3 |
| Parameter | Value |
|---|---|
| Operating temperature, max. | 70 °C |
| Operating temperature, min. | -25 °C |
| Storage temperature, max. | 80 °C |
| Storage temperature, min. | -40 °C |
| Parameter | Value |
|---|---|
| Height | 181 mm |
| Width | 105 mm |
| Depth | 86 mm |
The ETU350 is a fixed electronic trip; no voltage trigger, no communication module, no phase-failure detection — it's a straightforward thermal-magnetic replacement for standard line protection.
The interrupting curve drops as voltage rises: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 5.1 kA at 690 V.
Rated 250 A from 40 °C through 50 °C ambient; above that it derates linearly to 213 A at 70 °C.
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