CAN bus protection

1) Canbus Protectie

This design protects the CAN BUS against short circuiting and high voltages.
This design is ment to use in experiments.
When the tension reaches values out of the canbus specifications, a relais interrupts the CAN BUS.
De supply voltage is +12V.

2) NUP2105L

This dual bi-directional is designed for applications requiring voltage protection capability. It is intended for use in overvoltage and ESD sensistive equipment. This device features a dual junction common cathode configuration designed to protect two independent lines. (bi-directional).

3) AND8169/D

The AND8169/D is an application note for CAN BUS transceiver it describes the protection against ESD (= ElectroStatc Discharge) and EMI (= Electro Magnetic Interferences)

4) Can chokes

The B82792C2 is desiged to block assymetric interferences (up to MHz).

5) (PTC) Resettable fuses => bus protection

These components protect agains over-current and over-voltage.

Datasheet	Datasheet

6) Can bus varistor

The CAN BUS varistor is a zinc oxide (ZnO) based ceramic semiconductor device with nonlinear voltage-current characteristics (bi-directional) similar to back-to-back Zener diodes and an EMC capacitor in parallel (see equivalent circuit model). They have the added advantage of greater current and energy handling capabilities as well as EMI/RFI attenuation. Devices are fabricated by a ceramic sintering process that yields a structure of conductive ZnO grains surrounded by electrically insulating barriers, creating varistor like behavior.