|
|
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?
! V; N, F; o1 t& M1 G/ w1 E, |0 B+ I$ f+ t+ X9 c! d
按照UL8750:
: T, ~5 b8 {- f4 M4 v5 N7 D4 P3 V7.7.1 Printed wiring boards shall meet the following criteria:
9 ?; ]% O2 k5 K2 t: D9 Ia) Conductive traces shall be bonded to the substrate for the minimum conductor width and
1 c; T; Y/ C/ Qmaximum unpierced area as required by the Standard for Printed-Wiring Boards, UL 796,# b; W( N+ x9 B5 H% v( ]1 M9 ?
Exception: Printed-wiring boards that are completely encased in potting compound are permitted. p9 D, q' c0 G9 j7 P' O/ h* O( u
to exceed their specified minimum conductor width or maximum unpierced area.
; l; A8 d; t4 K' bb) Temperatures measured in the temperature test of 8.3 shall not exceed the temperature! C7 Y( \4 n! C' u h
rating (RTI) of the substrate as determined by the Standard for Polymeric Materials – Long" R5 E: ~" ^( {4 e) X1 v
Term Property Evaluations, UL 746B, and; K2 O! y" x- X8 ]& [
c) Printed wiring board substrate flammability shall be no less than V-1 in accordance with the
u, B7 P% Q4 B6 YStandard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL
: n: r- z& D/ s s( D) K( ~94.
: F; ?' }/ O: E1 t. E( [Exception: A circuit supplied by a Class 2 or LVLE source need not comply.
* ?# \; k$ O& o' V& J+ }3 b8 c) f N1 O5 |% w
2 N! e) w5 W' m4 @& k" i0 {! g8 [
可以看是否满足Exeption 要求。 |
|