SEKI ST-22 Thermostat with 100000 Cycles Plastic Case Temperature Switch for Over-Current Protection
BW & BH series protectors offer reliable protection against over-current and over-temperature conditions. These sealed units feature small internal resistance, silent operation, and automatic reset functionality. The temperature and current-sensitive bimetallic components change state when exposed to excessive conditions, either cutting off or restoring the circuit as needed. BH series provides enhanced safety with immediate response to sudden current surges.
| Electrical Rating | DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V max 16A |
|---|---|
| Open temperature | (30~150)±5°C; 5°C a step |
| Reset temperature | 2/3 of the action temperature with tolerance of ±15°C. Custom reset temperatures available. |
| Life times | 10000 cycles |
| Size | L15mm W7.1mm H3.8mm |
| Lead wire | #22 3266, end half tripping, length is 70mm (custom options available) |
| Certifications | UL File no: E487478 CQC no: CQC16002142880 TUV no: B160592241002 |
| Model | Case | Length(mm) | Width(mm) | Height(mm) | Voltage & Current | Lead Wire |
|---|---|---|---|---|---|---|
| H20 | Plastic | 18.5 | 8 | 4 | DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V max 10A | #20 3135, end 5mm half tripping, length 70mm (custom options available) |
| H21 | Metal | 18.5 | 7.3 | 3.8 | ||
| H21 | Metal | 20 | 8 | 4 | AC250V 20A | #16 3135 |
| BH-A1D | Metal | 15 | 6.6 | 3.2 | DC-12V max 12A; DC-24V max 10A; AC-125V max 8A; AC-250V | #20 3135, #22 3266, #22 3135, end 5mm half tripping, length 70mm (custom options available) |
| Code | Temperature | Code | Temperature |
|---|---|---|---|
| 30 | 30℃ | 100 | 100℃ |
| 35 | 35℃ | 105 | 105℃ |
| 40 | 40℃ | 110 | 110℃ |
| 45 | 45℃ | 115 | 115℃ |
The ST-22 thermal protector serves as an effective security device for various applications including 1.5 horsepower motors, inverter welding machines, switch power supplies, fluorescent lamp ballasts, and other electrical equipment. The reinforced version withstands pressures up to 3.5MPa, making it suitable for plastic-coated motor installations.
This product holds UL, CQC, TUV and RoHS certification approvals.
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