ST-22 SEKI 250V 16A Bimetallic Thermostat with 50-150℃ Range 100000 Cycles and Bakelite Case
The ST-22 SEKI series are universal and enhanced protectors with large metal casing, composed of thermal conductive metal casing, bimetallic parts welded with silver alloy contact point, conductive bracket, insulation fixation stand, fixed contact strip and heat resistance cable.
In case of abnormal operation, when the environment temperature increases to the set value, the bimetallic parts perform quick action to open the contact point and disconnect the circuit. When cooled to safe operating temperature, the contact point automatically closes to resume normal operation.
- Snap-action mechanism for reliable operation
- Automatic reset function
- Durable construction with silver alloy contacts
- Thermal conductive metal casing
- Certified to UL, CQC, TUV and RoHS standards
| 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 (customizable) |
| Life times | 10000 cycles |
| Contact Closure resistance | ≤50mΩ |
| Insulation resistance | ≥100mΩ |
| Electric strength | AC1500V/1min free from phenomena of break down and flashover |
| Certifications | UL File no: E487478 CQC certificate no: CQC16002142880 TUV certificate no: B160592241002 |
| Model | Case | Dimensions (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 (customizable) |
| H21 | Metal | 18.5 × 7.3 × 3.8 | 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, length 70mm (customizable) |
| BH-B2D | Plastic | 15 × 7.1 × 3.8 | ||
| BH-TB02B-B8D | Plastic | 15 × 5.2 × 2.4 | DC-12V max 4A; DC-24V max 3A; AC-125V max 3A; AC-250V max 2A | 3266-AWG24#, 3135-AWG24# or nickel strip, length 70mm (customizable) |
The H20/H21 series is suitable for:
- Chargeable batteries
- Ballasts
- Massagers
- Micro motors
- Transformers
- Electric tools
- Heat electric appliances
- Instruments
Manual Reset Type: When temperature reaches the action range, the bimetallic strip quickly disconnects. The contact point cannot reset automatically - requires manual reset by pushing the reset button after temperature declines by 20°C (4-6N force recommended).
Auto Reset Type: Automatically resets when temperature declines to a fixed point after disconnection.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.