Siemens 3VA5140-1MH31-0AA0 Circuit Breaker
Key Specifications
| Parameter | Value |
|---|---|
| Current Rating | 40 A |
| Number of Poles | 3 |
| Interrupting Capacity | 65 kA |
| Actuator Type | Lever |
| Mounting | DIN Rail |
| Illumination | None |
| Encapsulation | Box |
| Approvals | CCC, CE, CSA, EAC, UL489, VDE |
| RoHS Status | Non-compliant |
| Product Status | Active |
Trade-offs from Stated Specifications
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The 65 kA interrupting rating supports high fault-current bus structures but exceeds what most 40 A motor branch circuits in standard industrial panels actually require—specifying down to 35 kA or 25 kA typically yields cost and size reductions without sacrificing protection adequacy.
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Motor circuit protector (MCP) classification provides motor starting current coordination but does not serve as a thermal-magnetic branch breaker for general distribution; downstream coordination studies must confirm selective coordination with upstream devices.
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Three-pole configuration is required for three-phase motor loads but consumes more DIN rail space than a two-pole variant and provides no benefit for single-phase feeders where only hot and neutral are present.
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Absence of illumination means no visual load indication at the device—status feedback relies entirely on upstream monitoring or external auxiliary contact modules if required by the control scheme.
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RoHS non-compliant status restricts deployment in equipment destined for EU markets or customers with environmental compliance mandates—confirm end-market requirements before specifying.