Type A vs Type J Plugs: Grounding & Voltage Differences & Compatibility
Type A is a 2-pin, ungrounded plug rated 15A at 100-127V, while Type J is a 3-pin, grounded plug rated 10A at 220-240V. The two differ mainly in grounding, voltage, amperage and pin design, which is what decides compatibility — whether a Type A plug fits a Type J socket, and vice versa. Compare this with type H vs type K plug.
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Type A
|
Type J
|
|
|---|---|---|
| Standard | NEMA 1-15 | SEV 1011 |
| Pin Configuration | Two flat parallel pins (15.9mm apart, 15.9mm long, 6.3mm wide) | Two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others) |
| Grounding | Ungrounded | Grounded |
| Pin Count | 2 | 3 |
| Amperage | 15A | 10A |
| Voltage Range | 100-127V | 220-240V |
Key Differences Between Type A and Type J
Here's how Type A and Type J compare, point by point.
- Grounding: Type A has no grounding. Type J adds a grounding pin or clips to protect against electrical faults.
- Pin Size and Shape: Type A: Two flat parallel pins (15.9mm apart, 15.9mm long, 6.3mm wide). Type J: Two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others).
- Application: Type A is typically used for heavy-duty appliances such as hair dryers, kettles, and heaters. Type J is typically used for everyday household electronics and small appliances.
Type A and Type J Compatibility
Type A in Type J Sockets: Generally no. A Type A plug (Two flat parallel pins (15.9mm apart, 15.9mm long, 6.3mm wide)) does not fit a Type J socket (Two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others)) without a travel adapter.
Type J in Type A Sockets: Generally no. A Type J plug (Two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others)) does not fit a Type A socket (Two flat parallel pins (15.9mm apart, 15.9mm long, 6.3mm wide)) without a travel adapter.
If you're planning a trip, tell us which country you're visiting and we can confirm whether you need a Type A or Type J travel adapter.
Does a Type A plug fit into a Type J socket?
Generally no. A Type A plug (Two flat parallel pins (15.9mm apart, 15.9mm long, 6.3mm wide)) does not fit a Type J socket (Two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others)) without a travel adapter.
Are Type A and Type J plugs the same?
No. Type A follows the NEMA 1-15 standard and Type J follows SEV 1011 — they differ in grounding, pin count, voltage rating. Compare this with is type C compatible with type J.
Which countries use Type A and Type J plugs?
Type A plugs are used in 61 countries, including American Samoa, Anguilla, Antigua and Barbuda, Aruba, Bahamas. Type J plugs are used in 4 countries, including Jordan, Liechtenstein, Maldives, Switzerland.
How can you tell a Type A plug from a Type J plug?
A Type A plug has two flat parallel pins (15.9mm apart, 15.9mm long, 6.3mm wide), and is ungrounded. A Type J plug has two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others), and is grounded. The quickest tell is the grounding pin or clips — only the grounded one has them. Compare this with type B vs type O plug.