Consultation：Cherry Lee Add：Shangchegang Industrial,Hengli Twon, Dongguan City,Guangdong Province, China
H21 metal case thermal protector
BW series thermostat / KSD9700 thermal protector / BW9700 temperature protector
1. H20,H21 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.
2. H20,H21series thermal protector’s Specification
2.1. Switch type: normally closed, normally opened.
2.2. Operating Voltage / Current: AC250V / 5A; AC125V / 8A
2.3. Operating Temperature: 40~150℃ (one step for every 5°C)
2.4. Standard Tolerance: ±3°C / ±5°C / ±7°C
2.5. Reset temperature: operating temperature decrease by 15-45°C
2.6. Contact Closure resistance: ≤50mΩ
2.7. Insulation resistance: ≥100mΩ
2.8. Electric strength: AC1500V/1min free from phenomena of break down and flashover.
2.9. Service life: 10000 times
3. H20,H21series thermal protector’s Dimension
| Model | Case | Length | width | High | Lead wire |
| H20 | Plastic | 18.5 | 8 | 4 | #22 3266 white, or according client’ reques |
| H21 | Metal | 18.5 | 7.3 | 3.8 | #20 3135 red, or according client’ request |
4. H20,H21series temperature protector’s Application
H20,H21series is applicable to chargeable battery, ballast, massager, micro motor, transformer, electric tools, heat electric appliance and instrument etc.
|
code |
open temp. |
reset temp. |
code |
open temp. |
reset temp. |
|
50 |
50+-5℃ |
≥30℃ |
110 |
110+-5℃ |
75+-12℃ |
|
55 |
55+-5℃ |
≥30℃ |
115 |
115+-5℃ |
80+-12℃ |
|
60 |
60+-5℃ |
40±10℃ |
120 |
120+-5℃ |
85+-12℃ |
|
65 |
65+-5℃ |
45±10℃ |
125 |
125+-5℃ |
90+-12℃ |
|
70 |
70+-5℃ |
50±10℃ |
130 |
130+-5℃ |
95+-12℃ |
|
75 |
75+-5℃ |
55±10℃ |
135 |
135+-5℃ |
100+-12℃ |
|
80 |
80+-5℃ |
60±10℃ |
140 |
140+-5℃ |
105+-12℃ |
|
85 |
85+-5℃ |
65±10℃ |
145 |
145+-5℃ |
110+-12℃ |
|
90 |
90+-5℃ |
70±10℃ |
150 |
150+-5℃ |
115+-12℃ |
|
95 |
95+-5℃ |
75±10℃ |
155 |
155+-5℃ |
120+-12℃ |
|
100 |
100+-5℃ |
80±10℃ |
160 |
160+-5℃ |
125+-12℃ |
|
105 |
105+-5℃ |
70+-12℃ |
or according to client's request. |
||
The product UL,CQC,TUV and RoHS certification approval.
UL:E487478
TUV:B160592241002 Rev.01
CQC16002142880 plastic case
CQC:16002142881 metal case
