High quality 15A 250V Mini Thermal Cutoff Fuse Link with Tape and
Scope of application:
RYD thermal fuse is one shot thermal protect component ,it widely
use for all kinds of small home appliances and Automobile
industry,operation temperature can be from 73C to 250C based on
Tape&reel pack can fulfil full automatically production
Our normal package
3000pcs per reel,2reels per carton,
N.W/G.W per carton:9/10kgs
Shipping port :Ningbo or Shanghai
We can design the package according to customer's requirementcan
TF (Rated Functioning Temperature)
The temperature of the thermal cutoff which causes it to change its
state of conductivity with a detecion current up to 10 mA as the
only load. Under the UL/IEC standards the tolerance is +0℃, -10℃.
TH (Holding Temperature)
The maximum temperature of the thermal cutoff at which it will not
change its state of conductivity for 168 hours while conducting its
rated voltage. It is called Th for short by UL and called Tc by
TM (Maximum Temperature Limit)
The temperature of the thermal cutoff, up to which the mechanical
and electrical properties of the thermal cutoff, having changed its
state of conductivity, will not be impaired for 10 minutes.
Operating principle of RYD thermal fuse
RYD thermal fuse is made up of star contact,spring and thermal
In the picture, we can see that current is started from the left
down-lead on the right.When the external temperature reaches
operating temperature,the thermal pellet would be melted,which
would cause the spring loose,and then separate the connection
between star contact and the left down-lead. Thus, the current
would be totally cut.
The products have the ability to cut circuit immediately for high
current,with non-resettable. The thermal fuse has low internal
resistance itself,small size that easy to install. The products are
sensitive to external temperature and the operating temperature has
high accuracy and stability.
|Test Project||Monitor Test||Storage test||Random number||Allow defctive products|
1 No load operating temperature test(TF):
Fuse placed in the 0-300 degree temperature test box(oil
temperature testing), Then warming to rated operating temp of
sample in the speed of 0.5k/min to 1k/min the test result should
within +0/-10C of rated TF.
2 No load Holding temperature test(TH):
Fuse placed in the test box, applide current/ voltage does not
exceed the amount of Set range, the Testing TH temperature does not
exceed the scope of Th temperature of the test in 7days.
3 Contact resistance:
A measurement of contact resistance betwween E and the case should
be no more than 5mohm.
4 Electrical strength:
Between lead and metal casing is conductive, so do not do this
5 Wet test:
Standard experimental conditions
For TF<=100C thermal fuse
For TF>100C thermal fuse