Siemens SENTRON RC unit electronic, 5SM9 design, 2-pole, type A, short-time delayed, In: 40 A, 30 mA, Un AC: 400 V, 50 Hz.
| Parameter | Value |
|---|---|
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Product designation | RC unit electronic |
| Product design / construction | Short-time delayed |
| Parameter | Value |
|---|---|
| At 40 Cel | 37.2 A |
| At 45 Cel | 37.2 A |
| At 50 Cel | 36 A |
| At 55 Cel | 34.8 A |
| At 60 Cel | 34 A |
| At 65 Cel | 33.2 A |
| At 70 Cel | 32 A |
| Rated value | 50 Hz |
| Type of fault current | A |
| Circuit-breaker (Design) | 5SM9 |
| Current (at AC) | 40 A |
| Supply voltage (at AC) | 400 V |
| Tripping residual current | 30 mA |
The short-time delay allows it to ride through brief inrush or transient leakage without nuisance tripping — useful on circuits feeding electronics or motor starters that see a short surge on energization.
The unit holds a full 37.2 A up to 45 °C, then derates linearly: 36 A at 50 °C, 34.8 A at 55 °C, 34 A at 60 °C, 33.2 A at 65 °C, and 32 A at 70 °C.
It is rated at 37.2 A at 40 °C.
It is rated at 37.2 A at 45 °C as well.
This part is 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.
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