Models and Applications of Thermal Cut-Out link Fuse

What is a thermal fuse?
A thermal fuse is also known as a tmperature fuse, thermal link, thermal cut-out (TCO), or one shot. It is a temperature sensing circuit cut-off device (China custom metal, ceramic, square shell thermal fuse). A limitor thermal fuse can sense the overheating generated by abnormal operation of electrical and electronic products, thereby cutting off the circuit to avoid fire.

10A 250V Circuit Cut Off Temperature Thermal Fuse Assortment Kit – 100℃ to 280℃

3392519 Dryer Thermal Fuse Part – Kenmore Dryer Thermal Fuse Fit

Whirlpool Kenmore – Replaces AP6008325 3388651 694511 80005 WP3392519VP

A limitor thermal cut-out fuse functions as a safety device that automatically interrupts an electrical circuit when the temperature reaches a predetermined threshold, essentially acting as a “heat-activated circuit breaker” to prevent overheating and potential fire hazards in appliances or equipment by cutting off power when excessive heat is detected; it’s primarily used in devices like hairdryers, Dryer, coffee makers, and electric motors where overheating could occur due to malfunctioning components.

Key points about thermal fuses:
How it works:
When the temperature around the thermal fuse exceeds its rated temperature, a special fusible material inside melts or breaks, causing the circuit to open and stopping the flow of electricity.

Non-resettable:
Unlike regular fuses, a thermal fuse cannot be reset once it has tripped and needs to be replaced if overheating occurs.

Its structure and working principle:
It consists of a sliding contact , a spring, and a electrically nonconductive thermalpellet. Before the thermal fuse is activated, the current flows from the left lead to the movable contact (sliding contact), and flows to the right lead through the metal shell. When the external temperature reaches the predetermined temperature, the fusible element melts and the compression spring becomes loose. That is, the spring expands, and the sliding contact separates from the left lead. The circuit is opened, and the current between the sliding contact and the left lead is cut off.

Temperature-sensitive only:
Unlike a standard circuit breaker, a thermal fuse only responds to temperature changes, not current surges.
Applications:
Household appliances: Hairdryers, toasters, electric blankets, Transformers, Electric motors, Electric fans, Hair dryers, Electric irons, Rice cookers, Copiers, Electric stoves, Chargers, power taps, Water dispensers, Coffee makers etc.
Motor applications: Electric motors in appliances and machinery
Industrial equipment: Transformers, heating elements, power tools.

Models and Applications of Thermal Cut-Out link Fuse

216℃ 10A 15A Circuit Cut Off Temperature Ceramic Thermal Cutoffs Fuse

New RH Aupo Thermal Fuse Cutoff Double Lead Temperature Control Thermal Fuse 250V A 2A 3A 5A 250V Black

Product Description

Item	thermal fuse, thermal cutoff, thermal link
Body Tyle	Metal
Lead Dia	1mm
Lead Length	see table 3
Current Rating	15A 10A 20A @250VAC
Mounting Type	axial leaded
Body Dia	4mm
Body Length	14.7mm
Certifications	UL VDE

Thermal fuse models and cut-off temperature table:

Tf ºC	G4A		G5A
Tf ºC	Th ºC	Tm ºC	Th ºC	Tm ºC
72	57	100	57	410
73	58	100	58	410
77	62	300	62	410
84	69	220	69	220
91	76	300	76	430
93	78	300	78	410
98	83	300	83	410
104	89	200	89	225
110	95	240	95	225
117	102	240	102	410
121	106	300	106	410
125	110	185	110	235
128	113	205	113	235
134	119	205	119	410
141	126	205	126	350
144	129	300	129	410
152	137	205	137	410
158	143	240	143	410
167	152	210	152	410
172	157	310	157	410
184	169	240	169	410
190	175	350	175	410
192	177	210	177	350
205	190	310	190	410
216	200	450	200	410
229	200	450	200	410
240	200	450	200	410
257	220	470	–	–