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最主要是接點壽命，影響操作次數。, @; [7 g4 K" F8 G" r) e# k4 d6 L
: T$ g$ H6 J# m4 w2 V另一點是，接點還是有接觸電阻值（Contact Resistance）的，功耗過大會熔化黏住，最好有電弧保護（Arc Suppressor 或稱 Snubber）電路。你要多測幾次，有時候一開始正常，但最後就黏住不會動了。& q' }5 B7 ]( e0 n8 p
4 e) i0 ^) L, tMaximum Switching Voltage
2 d8 e; D0 E. F/ N' vThe maximum open circuit voltage which can safely be switched by the contacts. AC and DC voltage maximums will differ in most cases.
4 O( b- b$ x5 V! MMaximum Switching Current, T% p$ F# ~1 A2 J3 @6 a
The maximum current which can safely be switched by the contacts. AC and DC current maximums may differ.: Q1 S: }- U6 w! i& B! S2 U
Maximum Switching Power
; U l% n+ p8 v9 ?4 i: `+ AThe upper limit of power which can be switched by the contacts. Care should be taken not to exceed this value.1 m0 y2 x& n8 O- C6 R" M
Maximum Carrying Current
\; o3 s2 q2 O! l7 hThe maximum current which after closing or prior to opening, the contacts can safely pass without being subject to temperature rise in excess of their design limit, or the design limit of other temperature sensitive components in the relay (coil, springs, insulation, etc.). This value is usually in excess of the maximum switching current.- h" X9 R% V3 j" f' k+ o) L0 Z
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发表于 2018-1-15 21:58
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支持！
反对！
发表于 2018-1-16 08:07
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