Auto Reset Thermal Protector Fuse - Metal Case Thermal Protection Switch
BH-A1D Series Thermostat Principle and Structure
The BH-A1D series provides protection against over-current and over-temperature conditions. These devices are firmly sealed, feature small internal resistance, operate silently, and reset automatically. When current flows through the temperature and current-sensitive bimetal, its status changes in response to over-temperature or over-current conditions, either cutting off or switching on the circuit. BH series protectors are safer than standard protectors, as they eliminate temperature effect lag under sudden high-current conditions.
BH-A1D Series Thermostat Specifications
| 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 |
#20 3135, end half tripping, length is 70mm, or according to customer's require |
| UL File No |
E487478 |
| CQC Certificate No |
CQC16002142881 |
| TUV Certificate No |
B160592241002 |
BH-A1D Series Thermal Protector Applications and Instructions
BH series thermal protectors are effective, 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 built-in installation of plastic coated motors.
BH-A1D Thermal Protector Temperature Codes
| 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℃ |
|
|
BH-A1D Thermal Protector Item Number Coding
BH-A1D XXX K
| BH |
Design No. |
| A |
Material of case: metal-A; Plastic-B |
| 1 |
1,15×6.6×3.2 2,15×7.1×3.8 |
| D |
Resistance value of bimetallic G-high Z-moderate D-low |
| XXX |
Open temperature |
| K |
Type of Contact: K is Open, No signal is closed |
BH-A1D Thermal Protector Technical Drawing