NACS vs. Type 1 (J1772)
Comparing 2 standards across 12 specifications. 12 key differences identified.
SAE J3400 (originally designed by Tesla as the proprietary Tesla Connector and published in 2023 by SAE International as the North American Charging Standard / NACS) is an ultra-compact unified connector utilizing two primary conductors for both single-phase AC charging (up to 48A / 11.5 kW) and high-power DC fast charging (up to 1000V / 500A+ / 350+ kW). Adopted by virtually all major automakers across North America.
The SAE J1772 Connector (standardized as IEC 62196 Type 1, commonly called the J-Plug) is the standard single-phase AC charging interface for electric vehicles across North America and Japan. Featuring a 5-pin circular plug layout with an integrated mechanical top latch, it delivers Level 1 (120V / 16A / 1.9 kW) and Level 2 (208–240V / up to 80A / 19.2 kW) power.
Specification Comparison Table
12 Parameters| Parameter / Spec | ||
|---|---|---|
|
Standardization
|
SAE J3400 / North American Charging Standard (NACS) | SAE J1772 / IEC 62196-2 (Type 1) |
|
Pin Count & Configuration
|
5 pins: 2 dual-purpose power conductors (L1/DC+ and L2/DC-), 1 Ground (GND), 1 Control Pilot (CP), 1 Digital Communication pin | 5 pins: Line 1 (L1), Neutral/Line 2 (N/L2), Protective Earth (PE), Control Pilot (CP), Proximity Pilot (PP) |
|
Form Factor Size
|
Approx. 50% the physical volume and weight of bulky CCS Combo 1 handles | — |
|
Maximum DC Charging Rate
|
1000 V DC, 500 A+ continuous (liquid-cooled V4 Superchargers capable of 350 kW to 600 kW+) | — |
|
Maximum AC Charging Rate
|
240 V / 48 A single-phase AC (11.5 kW home wall connector) or 277 V commercial AC (13.3 kW) | — |
|
Solid-State Multiplexing
|
Vehicle internal high-voltage contactors dynamically switch the dual pins between the onboard AC charger and the direct DC battery pack | — |
|
Industry Adoption
|
Ford, GM, Rivian, Hyundai, Kia, BMW, Mercedes-Benz, Toyota, Honda, Volvo/Polestar, VW Group (native ports 2025+) | — |
|
AC Phase Support
|
— | Single-phase AC only (120V Level 1 or 208-240V Level 2) |
|
Maximum Current & Power
|
— | Up to 80 A continuous at 240 V AC (19.2 kW theoretical max; typical home EVSE is 32A to 48A / 7.7 to 11.5 kW) |
|
Signaling / Communication Protocol
|
— | 1 kHz Pulse Width Modulation (PWM) square wave on Control Pilot pin (+12V open, +9V EV detected, +6V charging) |
|
Mechanical Latch
|
— | Spring-loaded thumb release lever with microswitch on Proximity Pilot (terminates current before mechanical disconnect) |
|
Regional Deployment
|
— | Standard AC inlet on non-Tesla EVs in North America (pre-2025) and Japan (Nissan Leaf, Toyota Prius Prime, Chevy Bolt) |