ZY7 Wholesale Ceramic Limiting Motor Transformer Protection Thermal
Protectors PSE Temperature Fuse Thermal Cutoff Fuses
General introduction of thermal cutoffs:
RH series ceramic thermal cutoff has a certain range of temperature
setting and bearing capacity to select. When the device is not
working properly and will reach to the set max temperature, then
the ceramic thermal cutoff will cut off circuit to prevent security
incidents arise.Thermal cutoff mainly used in home appliances and
electrical components (e.g. transformers, solenoids, AC adopters)
overheating protector.
The dimensional drawing of thermal cutoffs:
| No | Qty | Specification |
| A | 2 | High temperature silicon fabric wire, Length and gauge are optional |
| B | 2 | If connectors attached, sleeving might be provided |
| C | 2 | Connectors are optional |
Model Number and main parameters of thermal cutoffs :
| Model No | Tf (Function tem) | Th (Holding temp) | Tm (Max Temp) | Rated voltage | Rated current | CB | TUV |
| RH 150 | 150C | 110C | 200C | 250V | 10A | Y | Y |
| RH 185 | 180C | 145C | 250C | 250V | 10A | Y | Y |
| RH 200 | 200C | 150C | 250C | 250V | 10A | Y | Y |
| RH 230 | 230C | 190C | 280C | 250V | 10A | Y | Y |
| RH 250 | 250C | 227C | 300C | 250V | 10A | Y | Y |
| RH 320 | 320C | 250C | 350C | 250V | 10A | Y | Y |
Test method of thermal cutoffs :
An indicator under current less than 10mA will be used for checking
circuit continuity.
1 Rated function temperature(Tf):
Put the samples into the professional oil oven, and remain 5 ~ 10
minutes under temperature Tf-20C. After that, increasing the
temperature at the speed of 0.5~1K/min until the fuse cuts. The off
temperature should be inside of tolerance.
2 Holding temperature (Th)
Put the samples inside of an incubator and the applied voltage
should be less than rated voltage, current applied at 10A. Then,
maintain the samples for 168 hours under Th-6C. After that, the
thermal fuse should not function or damaged.
3 Humidity test
Put the samples inside a sealed room under temperature 40±2C,and relevant humidity 90%~95% for 48 hours. After that, repeat test
3.1
4 Heat impact test
Put samples inside of a fridge at -18C for 15 minutes, then take it
out under room temperature for 5 minutes. After that, put the
samples to an incubator at temperature Tf-20C for15 minutes. Then,
take it out under room temperature 5 minutes again. Repeating the
above tests for 3 weeks, then test the contact resistance of
thermal fuse, the contact resistance between two leads should be less than 50mΩ.
More choices of thermal cutoff:
Production Capability, Precise Equipment
Q1:Why do you have a price advantage compared with other suppliers
of thermal fuse offered?
A:We have our own factory and have bought the first automatic assembly line with USA technology since
2010. Now most of our production lines are automatic. The automatic inspection equipment is under normal operation also.
Q2:What qaulity assurance system do you use in your factory to
ensure the thermal fuse quality?
A:Under IS0 9001 quality assurance system, we are producing over
200 million pcs organic type (RY type) thermal links every year.
Our products got the certification of TUV, CE, PSE, KC, CB and UL. In 2013, we cooperated with UL and established a laboratory under
Witness Testing Data Program. Then, we became the only one thermal fuse manufacturer in China
who has a laboratory under Witness Testing Data Program (WTDP).
ZY7 Wholesale Ceramic Limiting Motor Transformer Protection Thermal
Protectors PSE Temperature Fuse Thermal Cutoff Fuses
ZY7 Wholesale Ceramic Limiting Motor Transformer Protection Thermal
Protectors PSE Temperature Fuse Thermal Cutoff Fuses
ZY7 Wholesale Ceramic Limiting Motor Transformer Protection Thermal
Protectors PSE Temperature Fuse Thermal Cutoff Fuses
