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SM126G0 Fiches technique(PDF) 3 Page - NEC |
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SM126G0 Fiches technique(HTML) 3 Page - NEC |
3 / 8 page 3 SM/G SERIES Definition of Terms q Rated Functioning Temperature Rated functioning temperature is the operating temperature of the thermal cutoff, measured using the method specified in the safety standard. In Electrical Appliance and Material Control Law of Japan, case operation should be within the specified operating temperature range of ± 7 ˚C. In standards that comply with the IEC standard (such as UL, CSA, VDE, BEAB), it is called the rated functioning temperature, and should operate within the prescribed temperature range of +0/–10 ˚C. It is represented by the symbol TF in the UL standard, and by the symbol Tf in the CSA, VDE and BEAB standards. In SEFUSE, a temperature that complies with both standards is set as the rated functioning temperature, and is indicated on the body of the thermal cutoff. q Operating Temperature Operating temperature is the operating temperature range when the thermal cutoff is made to operate inside a constant temperature oven whose temperature is raised at the rate of 1 ˚C/min. while a detection current of 100 mA or lower is applied. The operating temperature is a standard set by NEC and is not specified by a safety standard. q TH, Th. Tc (Holding Temperature) Holding temperature is the maximum temperature at which, when applying a rated current to the thermal cutoff, the state of conductivity is not changed during 168 hours. It is represented by the symbol TH in the UL standard, Th in the CSA standard, and Tc in the VDE and BEAB standards. q TM, Tm (Maximum Temperature Limit) Maximum temperature limit is the maximum temperature for which conductivity does not occur again after thermal cutoffs operation. It is represented by the symbol TM in the UL standard and by Tm in the CSA, VDE and BEAB standards. q Rated Current Maximum alternating current that can pass through the thermal cutoff and that the thermal cutoffs can cut off the circuit in safety and reliability. q Rated Voltage Maximum circuit voltage that the thermal cutoffs can cut off the circuit in safety and reliability. |
Numéro de pièce similaire - SM126G0 |
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Description similaire - SM126G0 |
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