They are the same connector — that part is settled. What confuses buyers is that two different names keep appearing on cars, chargers and spec sheets. The reason is simple: NACS is the connector’s name; J3400 is the designation of the SAE standard that now defines it. Different documents use the name from their own world, and both labels point at the same plug.
Key Takeaways
- NACS and J3400 name the same connector — one is the consumer name, the other the SAE standard’s designation.
- Expect NACS in marketing and retail, J3400 in standards, procurement and certification documents.
- The name carries no specification: compare products on stated ratings, class and safety listing.
- Neither name is a brand or an approval; each product stands on its maker’s documents.
Two Names From Two Worlds
NACS — North American Charging Standard — is the name the connector was given when its design was opened to other makers. It is a consumer-facing name: short, descriptive, and already familiar from years of use on one brand’s cars and chargers. J3400 is how standards organisations name things: a numbered document in SAE International’s catalogue. When SAE standardised the connector, the design did not change — it gained a second, formal identity as a maintained standard. The pair is not two competing connectors: it is a product name and a document number for the same interface, much as a car model has both a marketing name and an engineering designation.
Where You Will See Each Name
| Where you are reading | Name you will usually see | Why |
|---|---|---|
| Car marketing, badges and reviews | NACS | Buyers recognise the name; it reads as a feature |
| Charger and adapter retail listings | NACS (often with J3400 alongside) | Sellers use the searchable name, then cite the standard as the reference |
| Owner manuals and engineering spec sheets | Either, or both | Technical documents cite the standard designation for precision |
| Standards, procurement and programme documents | J3400 (SAE J3400) | Formal documents reference standards by number, not by nickname |
| Certification and listing contexts | J3400 as the interface reference | The listing covers the product; the interface it must match is the numbered standard |
The pattern to remember: the closer a document is to engineering or regulation, the more likely it says J3400. The closer it is to a showroom, the more likely it says NACS. Our explainer Is the Tesla Charger NACS? answers the identity question itself, and Type 2 vs J1772 vs NACS places the connector among the other plugs a buyer meets.
Comparing Products That Use Different Names
The name is not a specification. A charger labelled NACS and one labelled J3400 describe the same interface, so comparing two products never turns on which name they use. It turns on what each product states:
- Stated ratings. Kilowatts and amps, in the product’s own figures — the name carries no power information.
- Stated class. AC or DC, home or public — again, in the product’s text, not its connector label.
- Safety listing. A testing laboratory’s mark for the exact model — a separate claim from either name, covered in our adapter safety guide.
- The maker behind it. Neither name is a brand. Tesla makes NACS products; so do many other manufacturers, and the warranty and support are each maker’s own.
One Interface on the Shelf
EVDANCE products show both habits at once. The EV-ACS3210T is sold as a NACS portable charger — 32 A, about 7.7 kW, IP66 — the name its buyers search for; the standard behind it is J3400. Adapters make the same point from the other side: the JT09, a NACS-to-CCS1 DC adapter with a handle, rated up to 500 A with IP66 sealing, is a NACS-named product built to the J3400 interface — and, like every DC adapter, usable only where your car maker approves third-party DC adapters for your exact car and the station is open to it.
Frequently Asked Questions
My car says NACS and the charger says J3400. Are they compatible?
On the connector, yes — the two labels name the same interface. Compatibility in a session also depends on the charger’s class and ratings matching your car, so read the product’s stated kilowatts and amps rather than stopping at the connector name.
Which name is the official one?
J3400 is the formal designation — the number of the SAE standard that defines the connector. NACS remains the name in everyday use, including by the makers who build to the standard. Neither makes the other wrong.
Does J3400 mean a product is made or approved by Tesla?
No. J3400 is a public standard maintained by SAE International, and NACS is a connector name, not a brand. Products using either label come from many manufacturers; check the maker, the stated ratings and the safety listing for the exact product.
Related Reading
- Is the Tesla Charger NACS? NACS, J3400 and Adapters Explained
- Type 2 vs J1772 vs NACS: Which EV Charger Connector Does Your Market Need?
- EV Charging News: NACS Overtakes CCS1 in U.S. DC Fast Charging Connectors
- Are EV Charging Adapters Safe?
