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黄卡里没有这个厚度你认为是UL通过了认证满足UL 796要求吗？$ l1 A% b, g8 J# r
) U' N/ m9 u4 I! N5 a# \. f按照UL8750：7 q. ~- H- G2 \$ _* p
7.7.1 Printed wiring boards shall meet the following criteria:
* C; r2 L- K4 U9 r) ga) Conductive traces shall be bonded to the substrate for the minimum conductor width and' d0 _6 H" f' `. w2 e
maximum unpierced area as required by the Standard for Printed-Wiring Boards, UL 796,4 G& r/ G+ l" C6 T5 W9 X" I
Exception: Printed-wiring boards that are completely encased in potting compound are permitted: M: L# Z" @2 q! L1 S0 c1 U( v
to exceed their specified minimum conductor width or maximum unpierced area.
- o% y/ M+ r' a+ @( P8 _b) Temperatures measured in the temperature test of 8.3 shall not exceed the temperature. k. X, b9 x" L; x9 b9 S, O
rating (RTI) of the substrate as determined by the Standard for Polymeric Materials – Long2 A* h8 \ I9 D8 |
Term Property Evaluations, UL 746B, and( P$ ?# ?! g a" h( \5 ]7 i
c) Printed wiring board substrate flammability shall be no less than V-1 in accordance with the
$ k- T5 ~' ]! ?, }% |: GStandard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL, G2 u, K+ S( {2 w- G# A& A; n
94.; S! r7 p. `( o6 u2 r0 N- B
Exception: A circuit supplied by a Class 2 or LVLE source need not comply.
+ q2 I0 a( \* V3 D# Z# `
+ T5 E3 ?% g0 m6 R. R% f4 q5 j: l( \4 {- g5 k# q8 ]- T/ w9 D4 c
可以看是否满足Exeption 要求。 |
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发表于 2010-6-9 16:47
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