BW-B2D 250V 10A BW-ABS 9700K Thermostat Temperature Controller
H21 H20.pdf
BW-B2D series thermostat’s Principle and structure
H20,H21serial universal and enhanced protectors with large metal casing are composed of the 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, along with the increase of the environment temperature to the set value, the bimetallic parts perform quick action, open the contact point, and disconnect the circuit. When the device is cooled to the temperature for safe operation, the contact point will automatically closes and recover normal operation.
BW-B2D series thermal protector’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 |
| 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 |
BW-B2D series thermal protector’s Dimension
| Model |
Case |
Length(mm) |
width(mm) |
High(mm) |
Vol.&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 require
|
| 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 require
|
| 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 require |
BW-B2D series temperature protector’s Application
H20,H21series is applicable to chargeable battery, ballast, massager, micro motor, transformer, electric tools, heat electric appliance and instrument etc.
3.1. Manual reset type: Temperature sensing components consist of bimetallic strip. When the temperature reached the action temperature range, it will jump quickly and the movable disc disconnects. When the temperature declines to a fixed temperature point, the contact point cannot reset until reconnecting the circuit by pushing the reset button. And then the contact points recover, reaching a purpose of connecting or disconnecting the circuit and restarting the circuit by manual reset. (Kindly reminder: 1.This type of manual reset thermostat can reset when the temperature declines 20 °C after snap action by pressing the reset button. And 4~6 N will be advisable; please don’t use too much strength. 2. To ensure the normal function, the distance between the reset button and the close cover should not be less than 20.4mm. )
3.2. Manual reset type: Temperature sensing components consist of bimetallic strip. When the temperature reached the action temperature range, it will jump quickly and the movable disc disconnects. When the temperature declines to a fixed temperature point, the contact point can auto reset and start working.
The product UL,CQC,TUV and RoHS certification approval.
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