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P1300SB Datasheet(PDF) 4 Page - Shanghai Leiditech Electronic Technology Co., Ltd |
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P1300SB Datasheet(HTML) 4 Page - Shanghai Leiditech Electronic Technology Co., Ltd |
4 / 9 page Thyristor Surge Suppressors P0060~P3500SA_B_C Series Figure 1.E xamples of protection stages for line cards In such a stage, parallel function is assumed by one or several Trisil, and is used to protect against short duration surge (lightning). During this kind of surges the Trisil limits the voltage across the device to be protected at its break over value and then fires. The fuse assumes the series function, and is used to protect the module against long duration or very high current mains disturbances (50/60Hz). It acts by safe circuit opening. Lightning surge and mains disturbance surges are defined by standards like GR1089, FCC part 68, ITU-T K20. Figure 2. Typical circuits Line Ring relay Line l a n i m r e t r o d r a c e n il L S D x . x E d r a c e n il g o l a n A . x E Fuse TCP 1.25A T1 T2 Typical circuit for subscriber side Fuse TCP 1.25A Tip S Gnd Ring S Fuse TCP 1.25A Tip L Gnd Ring L Typical circuit for central office side 4 |
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