KSD9700 Thermal Cut Off Switch with 50-150℃ Range Normally Closed or Open Auto or Manual Reset Thermal Protector
BW & BH series thermal protectors offer reliable protection against over-current and over-temperature conditions. These sealed devices feature small internal resistance, operate silently, and reset automatically. The bimetal components respond to temperature and current changes, cutting off or switching on circuits as needed for safety.
| 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. Reset temperature can also be provided according to customers' requirement. |
| Life Times | 10000 times |
| Size | L15mm W7.1mm H3.8mm |
| Lead Wire | #22 3266, end half tripping, length is 70mm, or according to customer's requirement |
| UL File No | E487478 |
| CQC Certificate No | CQC16002142880 |
| TUV Certificate 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 is 70mm, or according to customer's requirement |
| 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 is 70mm, or according to customer's requirement |
| 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 normally, length is 70 mm or according to customer's requirement |
BH series thermal protectors serve as effective and reliable security protector and alarm devices, widely used in various applications including:
- 1.5 horsepower motors
- Lighting devices
- Inverter welding machines
- Switch power supplies
- Rechargeable battery packs
- Fluorescent lamp ballasts
- Portable power tools
- Electric appliances and other electrical equipment
These protectors prevent damage from over-current and over-heating caused by abnormal work conditions. Enforced types that can withstand pressure of 3.5MPa are suitable for build-in installation of plastic coated motors.
| Code | Temperature | Code | Temperature |
|---|---|---|---|
| 30 | 30℃ | 100 | 100℃ |
| 35 | 35℃ | 105 | 105℃ |
| 40 | 40℃ | 110 | 110℃ |
| 45 | 45℃ | 115 | 115℃ |
| 50 | 50℃ | 120 | 120℃ |
| 55 | 55℃ | 125 | 125℃ |
| 60 | 60℃ | 130 | 130℃ |
| 70 | 70℃ | 135 | 135℃ |
| 75 | 75℃ | 140 | 140℃ |
| 80 | 80℃ | 145 | 145℃ |
| 85 | 85℃ | 150 | 150℃ |
| 90 | 90℃ |
H20 and H21 series universal and enhanced protectors feature large metal casings and are composed of thermal conductive metal casing, bimetallic parts welded with silver alloy contact points, conductive brackets, insulation fixation stands, fixed contact strips, and heat resistance cables. During abnormal operation, when environmental temperature reaches the set value, the bimetallic components perform quick action to open contacts and disconnect the circuit. When the device cools to safe operating temperature, contacts automatically close to restore normal operation.
| 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. Reset temperature can also be provided according to customers' requirement. |
| Life Times | 10000 times |
| Contact Closure Resistance | ≤50mΩ |
| Insulation Resistance | ≥100mΩ |
| Electric Strength | AC1500V/1min free from phenomena of break down and flashover |
| UL File No | E487478 |
| CQC Certificate No | CQC16002142880 |
| TUV Certificate No | B160592241002 |
H20 and H21 series thermal protectors are suitable for various applications including:
- Chargeable batteries
- Ballasts
- Massagers
- Micro motors
- Transformers
- Electric tools
- Heat electric appliances and instruments
This product holds UL, CQC, TUV and RoHS certification approvals, ensuring compliance with international safety and quality standards.
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