Type 1
SAE J1772
The round AC charging plug of the US, Canada, Japan and South Korea. New US models are moving to NACS, but 95% of US public Level 2 ports have J1772.
DominantNew US cars moving to NACS
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Your car has a J1772 or CCS1 port
Most non-Tesla EVs sold in North America, since NACS ports only began arriving with the 2025 model year, plus the AC port on the 2026 Nissan Leaf. Any J1772 post or home unit fits.
Your new car has a NACS port
J1772 is still on 95% of US public Level 2 ports, so keep a J1772-to-NACS adapter in the car for charging away from home.
You're charging in Japan or South Korea
Type 1 is the AC plug there too. In Japan it runs on 100 or 200 V, with 200 V chargers at 3 to 6 kW, and Teslas need a J1772 adapter.
- Carries
- AC only
- DC needs CCS1 or a 2nd port
- Spec maximum
- 19.2 kW
- 80 A at 240 V
- Typical US post
- 7.7 kW or less
- 3 in 4 listed ports, 2026
- US public AC
- 95% of ports
- Level 2 ports with J1772
- Main markets
- N. America
- Plus Japan and South Korea
Type 1 is also the AC half of CCS1
Type 1 carries AC only, through five pins: two for power, a ground, and two signal pins. CCS1 is the same shape with two DC pins added below, so a CCS1 car charges on AC from an ordinary J1772 plug.
NACS carries AC and DC through one smaller inlet, and its AC pins match J1772's, so simple adapters work both ways on AC. The 2026 Nissan Leaf sold in North America has both: a J1772 port for AC and a NACS port for DC.
| Car | AC | DC |
|---|---|---|
| CCS1 car | CCS1AC + DC | |
| 2026 Leaf, North America | Type 1 (J1772)AC | NACSDC |
| Leaf, Japan market | Type 1 (J1772)AC | CHAdeMODC |
| NACS car | NACSAC + DC | |
19.2 kW in the spec, 7.7 kW or less at most US posts
SAE J1772 allows 80 A at 240 V, or 19.2 kW, and some hardwired home units deliver it. Three in four US public ports list 7.7 kW or less. Your car's onboard charger can cap the rate lower still.
Type 1 charging power by current
| Row | Power |
|---|---|
| 80 A at 240 V, Spec maximum; hardwired 80 A units | 19.2 kW |
| 48 A at 240 V, Hardwired home unit | 11.5 kW |
| 40 A at 240 V, Plug-in unit, NEMA 14-50 or 6-50 | 9.6 kW |
| 12 A at 120 V, Level 1, household outlet | 1.4 kW |
| US public Level 2 ports, 3 in 4 listed at 7.7 kW or less | ≤7.7 kW |
Where you'll find Type 1
It is the everyday AC plug in the US, Canada, Japan and South Korea. Europe uses Type 2, and only older cars there have Type 1.
- Standard
- Shifting
- Older cars only
- Not used
| Region | 2026 | Heading toward |
|---|---|---|
| US and Canada | StandardOn 95% of public Level 2 ports | ShiftingNew cars move to NACS; new posts still J1772 |
| Japan | StandardStandard AC plug; Teslas need an adapter | StandardMazda plans NACS ports there from 2027 |
| South Korea | StandardType 1 for AC, CCS1 for DC | StandardNo phase-out date found |
| Europe and UK | Older cars onlyType 2 is standard; Type 1 on older cars | Older cars onlyType 1 cars use a Type 2-to-Type 1 cable |
Levels are Plughopper's reading of the figures shown, not an official classification.
Type 1 against CCS1, NACS and Type 2
| Attribute | Type 1 (J1772) (this page)Dominant | CCS1Declining | NACSGrowing | Type 2Dominant |
|---|---|---|---|---|
| Carries | AC only | AC and DC, one inlet | AC and DC, one inlet | AC; DC as CCS2 |
| AC phases | Single-phase | Single-phase, through Type 1 pins | Single-phase | Single or three-phase |
| Spec maximum (AC) | 19.2 kW (80 A at 240 V) | 19.2 kW, same AC pins as Type 1 | 22 kW (80 A at 277 V) | 43 kW (63 A, three-phase) |
| Main markets | US, Canada, Japan, South Korea | US, Canada, South Korea, Taiwan | US and Canada | Europe, including the UK |
Thirty years of J1772
SAE first published J1772 in 1996. Today's round five-pin plug was adopted in January 2010, and in 2012 SAE added two DC pins below it to make CCS1. Since 2023, automakers have been moving their North American models to NACS.
- Oct 1996
First version published
SAE issues the first J1772 recommended practice.
- Jun 2001
California adopts it
CARB adopts J1772-2001, a rectangular Avcon connector rated up to 6.6 kW.
- Jan 2010
The round plug arrives
SAE adopts the round five-pin design proposed by Yazaki, rated to 80 A. The Chevrolet Volt and Nissan Leaf use it.
- 2010–2024
The North American AC plug
Non-Tesla EVs charge on AC through J1772. As of mid-2024, only Teslas could use NACS without an adapter.
- Oct 2012
CCS1 builds on it
SAE adds two DC pins below the Type 1 shape, creating the Combo inlet now called CCS1.
- May 2023
Automakers pick NACS
Ford is the first major automaker to announce NACS for North America, GM follows in June, and other automakers after.
- Sep 2024
NACS becomes SAE J3400
SAE publishes J3400 as a recommended practice. Its AC pins match J1772's.
- Oct 2026
Still on 95% of US public AC ports
The federal station database lists J1772 on 173,118 of 182,309 public Level 2 ports.
What catches people out
The car sets the speed
A J1772 post can offer more than your car accepts. The 2018 to 2025 Nissan Leaf sold in the US takes 6.6 kW on AC, so it charges no faster on a 48 A home unit than on a 32 A one.
Level 1 is slow
A 120 V household outlet adds about 5 miles of range an hour; a 240 V Level 2 unit adds about 25. Level 1 suits short daily drives, not a long commute.
Adapters are AC only
A NACS-to-J1772 adapter works at Tesla wall and destination chargers, and a J1772-to-NACS adapter at Level 1 and 2 posts. Neither works at a Supercharger or any other DC fast charger.
Check which way the adapter goes
A Tesla-to-J1772 adapter takes a Tesla charger's plug and fits a J1772 car. A J1772-to-Tesla adapter is the reverse, for Teslas and other NACS cars. Read which car it is for before you buy.
Charge at home, and bridge the NACS gap
A 240 V home unit does the daily work on a Type 1 car. Two small AC adapters cover the switch to NACS, in either direction.
- Level 2 home charger240 V wall unit with a J1772 plugView on Amazon (opens in a new tab)
- NACS-to-J1772 adapterLets a J1772 car use Tesla wall and hotel chargersView on Amazon (opens in a new tab)
- J1772-to-NACS adapterLets a Tesla or NACS-port car use J1772 postsView on Amazon (opens in a new tab)
Amazon links. We earn a commission if you buy, at no extra cost to you.
Questions
What is a J1772 plug?
The round five-pin AC charging plug that SAE standardized for North America in 2010, also called Type 1. It carries AC only, up to 80 A or 19.2 kW. Japan and South Korea use it too, and the CCS1 fast-charging inlet is built around it.
Is J1772 being replaced by NACS?
On new cars in North America, partly. Automakers began fitting NACS ports from the 2025 model year, though the 2026 Nissan Leaf keeps J1772 for AC. On public chargers, not yet: J1772 is on 95% of US Level 2 ports, including 99% of those opened in 2026.
Can a Tesla use a J1772 charger, or the reverse?
Yes, for AC charging, with an adapter. A J1772-to-NACS adapter lets a Tesla or other NACS car use J1772 posts. A NACS-to-J1772 adapter lets a J1772 car use Tesla wall and destination chargers. Neither works at Superchargers or other DC fast chargers.