SOLVED - DIN style 6 pin connector identification - SmartDrive wheelchair motor

[thm_w]

This is from SmartDrive MX1+ wheelchair motor. Pins welded themselves inside the connector, want to check if its possible to replace the connector at all.

Anyone recognize the connector or logo? Looking through digikey at the moment.



Plug description:
- 6 pin DIN style connector, with latching portion above
- 13.5mm OD on the plug side
- "G" symbol on the connector

Receptacle:
- pin diameter ~1.5mm
- o-ring seal

Seems reasonably well designed with sealing, silicone. Board is not coated though.

edit: the dimension seems to match a M16 connector.

[fzabkar]

The logo appears to belong to "binder":

https://www.binder-connector.com/en/

It's not the right connector, but it might set you in the right direction:

https://au.rs-online.com/web/p/industrial-circular-connectors/1152641

[thm_w]

The logo appears to belong to "binder":

https://www.binder-connector.com/en/

It's not the right connector, but it might set you in the right direction:

https://au.rs-online.com/web/p/industrial-circular-connectors/1152641

oh that helps a lot, yeah not "G" but "b". Binder 440 series.
Definitely not cheap, but apparently the whole system was ~$8k.

https://www.farnell.com/datasheets/19167.pdf
Plug side: 99-4818-00-06
Receptacle side: 09-4819-15-06 or 09-4819-25-06

[thm_w]

The reason the connector was welded due to a dead short on that main PCB from BAT to GND. I tried plugging it in again and it completely vaporized the molex contact. BMS?
There is a small protection diode "F9 CK" beside the connector. Looked burned but removing it did not resolve short.

Q5 and Q6 FETs are shorted D to S, I missed that initially (probes not sharp enough). Probably happened when the filter capacitor fell off? it was the only thing on the board that wasn't glued... FET part number  FDD13AN06A

Ordered the Binder connectors ($$), soldered them with the existing wiring, and it seems to be working.
It won't run the motor until you push it a bit first, very similar to an electric push scooter.

thanks

[fzabkar]

Could "CK" be a 30V bidirectional TVS diode, SMBJ30C?

https://www.diodes.com/assets/Datasheets/ds19002.pdf
https://m.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_tvs_diode_smbj_datasheet.pdf.pdf

[thm_w]

Could "CK" be a 30V bidirectional TVS diode, SMBJ30C?

https://www.diodes.com/assets/Datasheets/ds19002.pdf
https://m.littelfuse.com/~/media/electronics/datasheets/tvs_diodes/littelfuse_tvs_diode_smbj_datasheet.pdf.pdf

Its not SMB, a bit smaller.
But, I think you are almost certainly right that its a 30V TVS or similar. The battery pack is 24V (~28V charged), so a 30V TVS would make sense.

edit:
Pinout was (female side of connector going CCW):
1 - Brown - Gnd
2 - Blue - Control
3 - Red - Batt +
4 - Orange - Gnd
5 - Yellow - Control
6 - Black - Batt +