Common mode choke parameters CAN circuitry - split termination concept
The termination value is independent of the used data rate. The bus needs to be terminated somewhere, but where it is terminated usually defines the integrator.
The capacitor has to be a 4.7 nF 50 V X7R type (independent of the data rate).
Central bus termination in one control unit: 2 x 60 Ω ±1% + 1x 4.7 nF to GND between the Resitors. (e.g. TJA1057 Datasheet Fig 8 on Page 14).
+High bus termination or not populated termination in all other control units: 2 x 4.7 kΩ ±1% + 4.7 nF
The common mode choke is to improve EMI. Usually automotive companies define a list of allowed types.
Approved for 500 kbit/s:
TDK ACT45C-101-2P-TL000, ACT1210-101-2P-TL00
Approved for up to 5 Mbit/s:
TDK ACT1210R-101-2P, ACT45B-101-2P-TL003, ACT45B-101-2P-TL002
Epcos B82789-C0104-N002, B82789-C0104-N001, B82789-C0104-H052, B82789-C0104-H002, B82789-C0104-H001
Murata DLW43SH101XK2#
Connecting the split pin to the capacitor is not allowed in automotive applications any more. That's why the 0R is recommended.
CH &amp; CL are not allowed in automotive environments and even the ESD diode isn't allowed to be populated by default to avoid too much capacitive load due to the quite long cable length (also for 500 kbit/s).