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A thermal fuse is also known as a tmperature fuse, termisk länk, termisk avstängning (TCO), or one shot. It is a temperature sensing circuit cut-off device (China custom metal, keramisk, square shell thermal fuse). A limitor thermal fuse can sense the overheating generated by abnormal operation of electrical and electronic products, därigenom bryta kretsen för att undvika brand.
What is a thermal fuse?
A thermal fuse is also known as a tmperature fuse, termisk länk, termisk avstängning (TCO), or one shot. It is a temperature sensing circuit cut-off device (China custom metal, keramisk, square shell thermal fuse). A limitor thermal fuse can sense the overheating generated by abnormal operation of electrical and electronic products, därigenom bryta kretsen för att undvika brand.
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, Torktumlare, kaffebryggare, and electric motors where overheating could occur due to malfunctioning components.
Key points about thermal fuses:
Hur det fungerar:
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 , en fjäder, and a electrically nonconductive thermalpellet. Before the thermal fuse is activated, De nuvarande flödena från vänster leder till den rörliga kontakten (glidkontakt), och flyter till höger ledning genom metallskalet. När den yttre temperaturen når den förutbestämda temperaturen, the fusible element melts and the compression spring becomes loose. Som är, Våren expanderar, and the sliding contact separates from the left lead. Kretsen öppnas, 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.
Ansökningar:
Household appliances: Hairdryers, rostrostar, electric blankets, Transformatorer, Elmotorer, Elfans, Hårtorkare, Elektriska strykjärn, Rispisar, Kopiatorer, Elektriska spisar, Laddare, kraftkranar, Vattendispensatorer, Kaffebryggare etc..
Motor applications: Electric motors in appliances and machinery
Industrial equipment: Transformatorer, heating elements, elverktyg.
Produktbeskrivning
Punkt | Termisk säkring, termisk avstängning, termisk länk |
Bodysuits Så mycket | Metall |
Led honom | 1mm |
Ledningslängd | se tabell 3 |
Aktuellt betyg | 15En 10A 20A @250VAC |
Monteringstyp | axiellt blyförsedd |
Hennes kropp | 4mm |
Kroppslängd | 14.7mm |
Certifieringar | UL VDE |
Thermal fuse models and cut-off temperature table:
Tf ºC | G4A | G5A | ||
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 | – | – |
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