thermal protector switch metal case BH-A1D use for motor electric
heater with UL TUV CQC ROHS
BH-B2D series thermostat’s Principle and structure
BH-A1D series that can protect against over-current and
over-temperature are sealed firmly, small internal resistance, no
noise and reset automatically. When current through bimetal that
are sensitive to temperature and current, the status of the bimetal
will be changed by over-temperature or over-current to cut off
circuit or switch on circuit. BH series are safer than normal
protectors, as there is no temperature effect lag under condition
of sudden big current.
BH-A1D series thermostat’s Specification
| 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's Application and Instruction
BH series thermal protectors ,effective reliable security protector
and alarm devices, are widely used in various types 1.5 horsepower
motors, lighting device, inverter welding machine, switch power,
rechargeable battery pack, fluorescent lamp ballasts, portable
power tools, electric appliances and other electric equipment to
prevent from over-current & over-heating caused by abnormal work
status. Enforced types that can withstand pressure of 3.5MPa are
fit for build-in-installation of plastic coated motor.
BH-A1D thermal protector temperature code
| 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 Code of Item No.
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-highZ-moderateD-low |
| XXX | Open temperature |
| K | Type of Contact: K is Open, No signal is closed |
BH-A1D thremal protector's drawing
