详情
~Specifications
*7AMI+PTC series thermal protector
1)With a PTC device
2)High security
3)Approval:UL,CUL,ROHS
4)Widely used
Instructions and Application
*7AMI+PTC series thermal protector, which being sensitive to
temperature & current, is a derivative product of
*7AMI series. With a PTC device, the unit won’t reset unless power
off. Having some characteristic such as
compact structure, miniature size, sensitive in action, large
contact capacity, long life, etc., the unit act as
protector for overheat and overflow in a wide application: vacuum
cleaner, lawn mower, electric tools,
disintegrator, blender, etc.
Working Principle
Building in a PTC heating element,*7AMI series thermal
protector turn into *7AMI+PTC series. Forming parallel circuit
between PTC heating element and thermal
protector contacts, the PTC heating element will carry current and
heated while the contacts cut off. It makes
the internal temperature of the thermal protector won\'t fall and
make contacts keep disconnect state. When
the power off, there is no longer a current through PTC heating
element, the internal temperature of the
thermal protector will fall, and *7AMI+PTC series will reset,
circuit closed in *0 to *0 seconds. Therefore, *7AMI
+ PTC series thermal protector has a delay of protection, more with
reliable safety.
