Inline Thermal Fuse uses a low-melting alloy temperature sensor as the main component. When the ambient temperature rises and reaches the melting point of the above-mentioned temperature-sensing body, the temperature-sensing body melts and shrinks into a bead at the end of the lead with the help of the built-in flux, thereby cutting off the current path.

Specification Table

TYPE TF ℃ TH ℃ TM ℃ ELECTRICAL RATINGS (A.C.) / SAFETY APPROVAL U L C-UL TUV CCC KETI PSE(JET) VDE BEAB M10 102 + 0 -10 75 165 1A/250V 2.5A/125V 1A/250V 2.5A/125V 2A/250V 2A/250V 2A/250V ——— ——— ——— M20 115 + 0 -10 85 165 1A/250V 2.5A/125V 1A/250V 2.5A/125V 2A/250V 2A/250V 2A/250V ——— ——— ——— M30 125 + 0 -10 90 165 1A/250V 2.5A/125V 1A/250V 2.5A/125V 2A/250V 2A/250V 2A/250V ——— ——— ——— M33 130 + 0 -10 100 165 1A/250V 2.5A/125V 1A/250V 2.5A/125V 2A/250V 2A/250V 2A/250V ——— ——— ——— L10 RoHS compliant 102 + 0 -10 75 165 1A/250V 2.5A/125V 1A/250V 2.5A/125V 2A/250V 2A/250V 2A/250V 2A/250V 2A/250V ——— L20 RoHS compliant 115 + 0 -10 85 ( for ref. ) 165 1A/250V 2.5A/125V 1A/250V 2.5A/125V 2A/250V 2A/250V 2A/250V 2A/250V 2A/250V 1A/250V L30 RoHS compliant 125 + 0 -10 90 ( for ref. ) 165 ——— ——— 2A/250V 2A/250V 2A/250V 2A/250V 2A/250V 1A/250V L33 RoHS compliant 130 + 0 -10 100 ( for ref. ) 165 2.5A/125V 2.5A/125V 2A/250V 2A/250V 2A/250V 2A/250V 2A/250V 1A/250V

Safety regulations: UL, CUL, CSA, BEAB, TUV, VDE, MITI ① TF—nominal operating temperature ② TOFF-actual cut-off temperature range: the temperature range that changes the conductive state of the hot melt measured under specified conditions. ③ TH-Holding temperature: The maximum temperature of the thermal fuse that will not change its conductive state under the specified conditions and within the specified time. ④ TM-Limit temperature: At this temperature, the electrical conductivity of the thermal fuse has changed, but its mechanical and electrical properties will not change within the specified time.