PEPPERL+FUCHS Z787.F 28V 300ohm Pepperl & Fuchs Z787.F Zener Barrier

Zener barrier with 2-channel, DC version, positive polarity, 50 mA fuse rating, replaceable back-up fuse and with diode return. Replaceable back-up fuse. The zener barrier prevents the transfer of unacceptably high energy from the safe area into the hazardous area. The zener diodes in the zener barrier are connected in the reverse direction. The breakdown voltage of the diodes is not exceeded in normal operation. If this voltage is exceeded, due to a fault in the safe area, the diodes start to conduct, causing the fuse to blow. The zener barrier has a positive polarity, the anodes of the zener diodes are grounded.