熔断器的主要参数
（1）额定电压 熔断器长期工作时和分断后能够耐受的电压，其量值一般等于或大于电气设备的额定电压。
（2）额定电流 熔断器能长期通过的电流，它决定于熔断器各部分长期工作时的容许温升。
（3）极限分断能力 熔断器在故障条件下能可靠的分断最大短路电流，它是熔断器的主要技术指标之一。
（4）弧前电流—时间特性。
（5）I2t特性 当分断电流甚大时，以弧前电流—时间特性表征熔断器的性能已足够了，因为此时燃弧时间在整个熔断时间并不能忽略。又由于这时电流在20ms甚至更短的时间内就分断，若以正弦波有效值来表示它，则在分析其热效应方面也不够恰当，因此，要通过积分（∫t0 idt）来表示热效应，这就是I2t特性。通常，熔断器的保护性能在熔断时间小于0.1s时是以I2t特性表征的;在熔断时间大于0.1s时,则用弧前电流—时间特性表征的。
（6）断开过电压 熔断器分断电路时因线路有电感所出现的、超过线路额定电压数倍的自感电势，它既会影响熄弧过程，也可能损坏线路和电气设备的绝缘。对于具有限流作用的熔断器，断开过电压相当高，对此尤应注意。
25SHA55 25SHA55S
25SHA60 25SHA60S 60
25SHA75 25SHA75S 75
25SHA85 25SHA85S 85
25SHA100 25SHA100S 100
25SHA125 25SHA125S 125
25SHA150 25SHA150S 150
25SH40 25SH40S 40
25SH50 25SH50S 50
25SH60 25SH60S 60
25SH75 25SH75S 75
25SH85 25SH85S 85
25SH100 25SH100S 100
25SH110 25SH110S 110
25SH125 25SH125S 125
25SH140 25SH140S 140
25SH150 25SH150S 150
25SH160 25SH160S 160
25SH180 25SH180S 180
25SH200 25SH200S 200
25SH215 25SH215S 215
25SH230 25SH230S 230
25SH260 25SH260S 260
25SH300 25SH300S 300
25SH325 25SH325S 325
25SH350 25SH350S 350
25SH375 25SH375S 375
25SH400 25SH400S 400
25SH450 25SH450S 450
25SH500 25SH500S 500
25SH550 25SH550S 550
25SH600 25SH600S
50SHA20 50SHA20S
50SHA25 50SHA25S
50SHA30 50SHA30S
50SHA35 50SHA35S
50SHA40 50SHA40S
50SHA45 50SHA45S
50SHA50 50SHA50S
50SHA55 50SHA55S
50SHA60 50SHA60S
50SHA70 50SHA70S
50SHA75 50SHA75S
50SHA80 50SHA80S
50SHB60 50SHB60S
50SHB70 50SHB70S
50SHB75 50SHB75S
50SHB80 50SHB80S
50SHB100 50SHB100S
50SHB120 50SHB120S
50SHB150 50SHB150S
50SHB175 50SHB175S
50SHB200 50SHB200S
50SHB235 50SHB235S
50SHB250 50SHB250S
50SHB275 50SHB275S
50SHB300 50SHB300S
50SHB350 50SHB350S
50SHL175 50SHL175S
50SHL200 50SHL200S
50SHL235 50SHL235S
50SHL250 50SHL250S
50SHL300 50SHL300S
50SHL350 50SHL350S
50SHL400 50SHL400S
50SHL450 50SHL450S
50SHL500 50SHL500S
50SHL550 50SHL550S
50SHL600 50SHL600S
50SHA20 50SHA20S 20
50SHA25 50SHA25S 25
50SHA30 50SHA30S 30
50SHA35 50SHA35S 35
50SHA40 50SHA40S 40
50SHA45 50SHA45S 45
50SHA50 50SHA50S 50
50SHA55 50SHA55S 55
50SHA60 50SHA60S 60
50SHA70 50SHA70S 70
50SHA75 50SHA75S 75
50SHA80 50SHA80S
50SHB60 50SHB60S 60
50SHB70 50SHB70S 70
50SHB75 50SHB75S 75
50SHB80 50SHB80S 80
50SHB100 50SHB100S 100
50SHB120 50SHB120S 120
50SHB150 50SHB150S 150
50SHB175 50SHB175S 175
50SHB200 50SHB200S 200
50SHB235 50SHB235S 235
50SHB250 50SHB250S 250
50SHB275 50SHB275S 275
50SHB300 50SHB300S 300
50SHB350 50SHB350S
50SHL175 50SHL175S 175
50SHL200 50SHL200S 200
50SHL235 50SHL235S 235
50SHL250 50SHL250S 250
50SHL300 50SHL300S 300
50SHL350 50SHL350S 350
50SHL400 50SHL400S 400
50SHL450 50SHL450S 450
50SHL500 50SHL500S 500
50SHL550 50SHL550S 550
50SHL600 50SHL600S
70SHA20 70SHA20S
70SHA25 70SHA25S
70SHA30 70SHA30S
70SHA35 70SHA35S
70SHA40 70SHA40S
70SHA45 70SHA45S
70SHA50 70SHA50S
70SHA55 70SHA55S
70SHA60 70SHA60S
70SHA70 70SHA70S
70SHA75 70SHA75S
70SHB60 70SHB60S
70SHB70 70SHB70S
70SHB75 70SHB75S
70SHB100 70SHB100S
70SHB120 70SHB120S
70SHB150 70SHB150S
70SHB175 70SHB175S
70SHB200 70SHB200S
70SHB235 70SHB235S
70SHB250 70SHB250S
70SHB300 70SHB300S
70SHA20 70SHA20S 20
70SHA25 70SHA25S 25
70SHA30 70SHA30S 30
70SHA35 70SHA35S 35
70SHA40 70SHA40S 40
70SHA45 70SHA45S 45
70SHA50 70SHA50S 50
70SHA55 70SHA55S 55
70SHA60 70SHA60S 60
70SHA70 70SHA70S 70
70SHA75 70SHA75S
70SHB60 70SHB60S 60
70SHB70 70SHB70S 70
70SHB75 70SHB75S 75
70SHB100 70SHB100S 100
70SHB120 70SHB120S 120
70SHB150 70SHB150S 150
70SHB175 70SHB175S 175
70SHB200 70SHB200S 200
70SHB235 70SHB235S 235
70SHB250 70SHB250S 250
70SHB300 70SHB300S
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