额定动作温度( Tf) Rated functioning Temperature
温度保险丝按安全标准规定方法测试，改变其导电状态的温度。按基于 IEC60691 的
安规标准规定, 温度保险丝必须在上述温度+0/-10℃范围内动作简称 Tf。
The temperature at which a Thermal Cutoff changes its state of conductivity to open circuit
detection current. The tolerance according to IEC60691 is form +0 to -10 ℃ .
实际动作温度 Fusing-off temperature
温度保险丝在硅油池内以每分钟 0.5 - 1.0℃速率升温，检测电流小于 10mA 条件下
所测得的熔断温度。它是温度保险丝的实际动作温度。
The thermal fuse heats up at a rate of 0.5 - 1.0℃per minute in the silica oil bath and detects
the fusing temperature measured at a current of less than 10mA. It is the actual operating
temperature of the thermal fuse.
保持温度( Th ) Holding temperature
温度保险丝在通过额定电流时，能保持 168 小时而不会改变其导电状态的最高温度用
Th 表示。
The maximum temperature at which a thermal fuse can be maintained for 168 hours without
changing its conductive state when passing through the rated current is indicated by Th.
极限温度( Tm ) Maximum temperature limit
温度保险丝能承受 10 分钟而不会发生重新接通现象的最高温度简称为 Tm.
The maximum temperature at which a Thermal Cutoff can be maintained for 10 minutes
without reclosing. This rating is required by safety standards based on IEC60691.
额定电流( Ir ) Rated current
温度保险丝所能承载的最大电流。
The allowable maximum current which a Thermal Cutoff is able it carry.
额定电压( Ur ) Rated voltage
温度保险丝最高工作电压。
The allowable maximum voltage which a Thermal Cutoff is able it carry