Siemens SENTRON 3VA1050-4ED42-0JC0, molded case circuit breaker, 4-pole, 50 A rated current, 121 kA breaking capacity at 240 VAC, line protection design, with shunt trip and 2 auxiliary switches.
| Parameter | Value |
|---|---|
| Product designation | Molded case circuit breaker |
| Brand / range | SENTRON |
| Basic switch (supplied) ref. | 3VA10504ED420AA0 |
| Integrated auxiliary / alarm switch ref. | 3VA9988-0AA12 |
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Rated operational voltage Ue (AC) | 690 V |
| Rated insulation voltage Ui | 800 V |
| Current at 40 °C | 50 A |
| Current at 45 °C | 50 A |
| Current at 50 °C | 50 A |
| Current at 55 °C | 49 A |
| Current at 60 °C | 48 A |
| Current at 65 °C | 46 A |
| Current at 70 °C | 45 A |
| Switching capacity class | S |
| Breaking capacity at 240 V | 121 kA |
| Breaking capacity at 415 V | 75.6 kA |
| Breaking capacity at 440 V | 52.5 kA |
| Breaking capacity at 500 V | 11.9 kA |
| Breaking capacity at 690 V | 11.9 kA |
| Power loss, max. | 14.6 W |
| Parameter | Value |
|---|---|
| Overcurrent release (trip unit) type | TM210 |
| 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 | Yes |
| Trip indicator | No |
| Communication function | No |
| Measurement function | No |
| Motor drive option | No |
| Auxiliary CO contacts | 2 |
| 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 | 130 mm |
| Width | 101.6 mm |
| Depth | 70 mm |
| Height (in) | 5.12 in |
| Width (in) | 4 in |
| Depth (in) | 2.76 in |
Breaking capacity reaches 121 kA at 240 VAC, 75.6 kA at 415 VAC, and holds at 11.9 kA at both 500 V and 690 VAC — that's the SCCR headroom for a 50 A frame in a distribution panel or motor control center.
The 50 A rating is continuous at 40–50 °C; above that the thermal derating curve drops it to 45 A at 70 °C. Power loss is 14.6 W maximum, which matters for enclosure heat rise calculations.
No communication function or undervoltage release on this variant.
At 240 VAC it interrupts 121 kA, at 415 VAC 75.6 kA, at 440 VAC 52.5 kA, and at 500 V or 690 VAC it holds at 11.9 kA.
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
Alternative models and sibling configurations in the same Siemens series. For obsolete or discontinued parts, these models can serve as compatible replacements or functional alternatives for plant maintenance.
No related articles