Siemens SENTRON 5SY8301-8, miniature circuit breaker, D tripping characteristic, 1 A rated current, 3-pole, 70 kA breaking capacity at 400 V AC.
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 3 |
| Pole configuration | 3P |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | D |
| Breaking capacity per IEC 60947-2 | 70 kA |
| Overvoltage category | III |
| IP protection class | IP20, with connected conductors |
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| Rated current (AC) | 1 A |
| Rated voltage (AC, multi-phase) | 440 V |
| Parameter | Value |
|---|---|
| Modular width units | 3 |
| Mounting position | any |
| Width | 54 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Terminal tightening torque, max. | 75 °C |
| Terminal tightening torque, min. | -40 °C |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Fastening method | Quick assembly system |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| Halogen-free | Yes |
| Silicone-free | Yes |
| Influence of surrounding temperature | max. 95% to 55°C, max. 55% to 70°C, max. 35% to 75°C |
At DC, it still handles 15 kA per IEC 60947-2, and under UL 1077 / CSA C22.2 No. 235 it's rated 5 kA — so it's recognized for North American supplementary protection as well.
Mounting position is any, which helps when you're cramming gear into a tight enclosure.
At 45 °C ambient the 1 A rating holds. At 50 °C it derates to 0.98 A, at 55 °C to 0.95 A. The maximum ambient is 75 °C, minimum -40 °C.
70 kA at 400 V AC per IEC 60947-2, 15 kA at DC per IEC 60947-2, and 5 kA per UL 1077 and CSA C22.2 No. 235.
The breaker carries IEC 60947-2, UL 1077, and CSA C22.2 No. 235 approvals. It is halogen-free and silicon-free. Standard Siemens declarations for RoHS, REACH, and CE are available with the product documentation.
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.
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