The 3VA2040-7KP42-0AA0: The 40 A continuous rating holds flat across the whole ambient range from 40 °C up to 70 °C — no derating needed if the panel runs hot. The 330 kA at 240 V (242 kA at 415 V, 187 kA at 500 V, and 3 kA at 690 V) tells you this breaker can interrupt a massive fault without blowing apart, which is what you need for a main or feeder position in a high-capacity distribution board. The 800 V rated insulation voltage means it's comfortable on 480 V or 600 V systems. The 86 mm depth and 140 mm width fit a standard 4-pole MCCB footprint on a DIN rail or panel-mount base.
Siemens SENTRON 3VA2040-7KP42-0AA0 MCCB, 40 A, 4-Pole, 240 V
MPN3VA2040-7KP42-0AA0
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Siemens SENTRON 3VA2040-7KP42-0AA0, 4-pole molded case circuit breaker, 40 A continuous rating, ETU850 electronic trip unit, line protection, 86 mm depth, 140 mm width, 181 mm height.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| 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 | 40 A |
| Current at 45 °C | 40 A |
| Current at 50 °C | 40 A |
| Current at 55 °C | 40 A |
| Current at 60 °C | 40 A |
| Current at 65 °C | 40 A |
| Current at 70 °C | 40 A |
| Switching capacity class | C |
| Breaking capacity at 240 V | 330 kA |
| Breaking capacity at 415 V | 242 kA |
| Breaking capacity at 440 V | 242 kA |
| Breaking capacity at 500 V | 187 kA |
| Breaking capacity at 690 V | 3 kA |
| Power loss, max. | 1.2 W |
| Parameter | Value |
|---|---|
| Overcurrent release (trip unit) type | ETU850 |
| Overcurrent protection function | LSI |
| Ground-fault monitoring | Without |
| Grounding protection function | No |
| 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. | 25 000 |
| Height | 181 mm |
| Width | 140 mm |
| Depth | 86 mm |
| Height (in) | 7.13 in |
| Width (in) | 5.51 in |
| Depth (in) | 3.39 in |
Product details
Frequently asked questions
Where can I buy 3VA2040-7KP42-0AA0 and how do I get a price?
This part is available to order against an RFQ through independent distribution; availability and current pricing are confirmed at quote time.
Will 3VA2040-7KP42-0AA0 drop into a panel specified around 3VA2040-8HN42-0AA0 without rewiring?
Both share the same SENTRON 3VA frame and footprint, so the physical fit and wiring connections are identical — the difference is the trip unit variant, so verify the trip curve matches your coordination study before substituting.
MPN
3VA2040-7KP42-0AA0