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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?
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按照UL8750: I" Q9 Z& e' T
7.7.1 Printed wiring boards shall meet the following criteria:
" t1 C% K' h: ]1 na) Conductive traces shall be bonded to the substrate for the minimum conductor width and
) p# d2 P2 M8 u" hmaximum unpierced area as required by the Standard for Printed-Wiring Boards, UL 796,' Z2 I P- g; P9 m- D
Exception: Printed-wiring boards that are completely encased in potting compound are permitted
: w+ ]2 F9 o, K; P8 m/ ato exceed their specified minimum conductor width or maximum unpierced area.
, ]: A7 K) g; b" x0 f! }; I3 Gb) Temperatures measured in the temperature test of 8.3 shall not exceed the temperature* c- F5 M3 X0 A! Z
rating (RTI) of the substrate as determined by the Standard for Polymeric Materials – Long" m& N. g- L$ Z5 v5 l4 s5 t6 A
Term Property Evaluations, UL 746B, and
! q2 G+ W# _; N- W1 G+ ?c) Printed wiring board substrate flammability shall be no less than V-1 in accordance with the7 z5 q* L( k- ^1 l3 X
Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL
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, B) i% D( `! @Exception: A circuit supplied by a Class 2 or LVLE source need not comply.
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可以看是否满足Exeption 要求。 |
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