What is a DC Surge Protective Device？
DC Surge Protective Devices (SPD) are essential for safeguarding electronic systems from voltage spikes, ensuring both reliability and efficiency. Their ability to absorb and redirect excess voltage helps ...
• Labyrinth arc extinguisher Prevent the spread of arcs in current surges.
• Built-in double row moving contacts Increase the arc voltage.
• Easy to install accessories Realize multiple protections (excitation, auxiliary, alarm etc.)
• Base is made of DMC material VO flame retardant.
• International CertificationTUV、CE、CB.
| Product model | SM8-125 | SM8-250 | SM8-400 | SM8-630 | ||
| Model frame rating Maximum rated current(A) | 125 | 250 | 400 | 630 | ||
| Rated current(InA) | 16/20/25/32/40/ 50/63/80/100/125 |
100/125/160/180/ 200/225/250 |
225/250/315/ 350/400 |
400/500/630 | ||
| Number of Poles | 2/3、4 | 2/3、4 | 3/4 | 3/4 | ||
| Rated insulation voltage(UiV) | AC1000 | AC1000 | AC1000 | AC1000 | ||
| Rated operating voltage(UeV) | AC400V/AC415V/690V | AC415V/690V | ||||
| Rated impulse withstand voltage(UimpV) | 8KV | |||||
| Ultimate short circuit breaking capacity Icu(KA) | 400 | L | 36 | 36 | 85 | 100 |
| M | 55 | 55 | ||||
| H | 85 | 85 | ||||
| 690 | H | - | - | 20 | 30 | |
| Running short circuit breaking capacity Icu(KA) | 400 | L | 27 | 27 | 65 | 75 |
| M | 42 | 42 | ||||
| H | 63 | 63 | ||||
| 690 | H | - | - | 15 | 20 | |
| Operational performance/time | On Power | 3000 | 2000 | |||
| No Power | 15000 | 10000 | ||||
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