SAE J3105

SAE J3105

ABB SAE J3105-1 station for Spokane Transit City Line
Type	Automotive power connector
Production history
Manufacturer	ABB, Heliox, SCHUNK, Siemens, Stäubli and others
Produced	2016+
General specifications
Pins	4
Electrical
Signal	DC
Pinout
+	DC	DC Power (positive)
–	DC	DC Power (negative)
PE	Protective earth	full-current protective earthing system
CP	Control pilot	post-insertion signalling
WiFi (IEEE 802.11n) used for pre-insertion signalling

SAE J3105 is a recommended practice for automated connection devices (ACD) that mate chargers with battery electric buses and heavy-duty vehicles. The practice is maintained by the SAE International with the formal title "Electric Vehicle Power Transfer System Using Conductive Automated Connection Devices Recommended Practice", and was first issued in January 2020. It covers the general physical, electrical, functional, testing, and performance requirements for automated conductive DC power transfer systems intended for heavy duty vehicles, focusing primarily on transit buses.

J3105 defines a common automated conductive charging system architecture so that any vehicle selecting one of the supplemental specific ACD implementations can use any charger that complies with that specific implementation, regardless of manufacturer, similar to how the earlier IEC 62196, SAE J1772, and SAE J3068 standards define the characteristics for a manually-plugged electric vehicle supply equipment interface.