Type J vs Type M Plugs: Differences & Compatibility

Type J vs Type M plugs are not compatible: an adapter is needed in both directions. Type J is a 3-pin, grounded plug rated 10A at 220-240V, while Type M is a 3-pin, grounded plug rated 15A at 220-240V. The two differ mainly in amperage and pin design, which is what decides compatibility — whether a Type J plug fits a Type M socket, and vice versa. You might also want comparing type A and type B plugs for international travel.

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Not Compatible Adapter needed in both directions Compatible Adapters	Type J	Type M
Standard	SEV 1011	BS 546 (15A)
Pin Configuration	Two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others)	Three large round pins in triangular pattern (earth 8.7mm diameter, live/neutral 7.1mm diameter)
Grounding	Grounded	Grounded
Pin Count	3	3
Amperage	10A	15A
Voltage Range	220-240V	220-240V

Key Differences Between Type J and Type M

Here's how Type J and Type M compare, point by point.

Grounding: Both Type J and Type M are grounded.
Pin Size and Shape: Type J: Two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others). Type M: Three large round pins in triangular pattern (earth 8.7mm diameter, live/neutral 7.1mm diameter).
Application: Type J is typically used for everyday household electronics and small appliances. Type M is typically used for heavy-duty appliances such as hair dryers, kettles, and heaters.

Type J and Type M Compatibility

Type J in Type M 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 M socket (Three large round pins in triangular pattern (earth 8.7mm diameter, live/neutral 7.1mm diameter)) without a travel adapter. Compare this with will a type D plug work in a type J socket without an adapter.

Type M in Type J Sockets: Generally no. A Type M plug (Three large round pins in triangular pattern (earth 8.7mm diameter, live/neutral 7.1mm diameter)) 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.

If you're planning a trip, tell us which country you're visiting and we can confirm whether you need a Type J or Type M travel adapter.

Type J vs Type M plug comparison: Type J and Type M wall sockets and plugs side by side, with the verdict and which way each plug fits, a specification table, key differences and how to tell them apart. Verdict: Not Compatible. — Type J vs Type M Plug: Differences and Compatibility (Infographic)

Does a Type J plug fit into a Type M socket?

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 M socket (Three large round pins in triangular pattern (earth 8.7mm diameter, live/neutral 7.1mm diameter)) without a travel adapter.

Are Type J and Type M plugs the same?

No. Type J follows the SEV 1011 standard and Type M follows BS 546 (15A) — they differ in pin design.

Which countries use Type J and Type M plugs?

Type J plugs are used in 4 countries, including Switzerland, Maldives, Jordan, Liechtenstein. Type M plugs are used in 9 countries, including India, South Africa, Nepal, Namibia, Mozambique.

How can you tell a Type J plug from a Type M plug?

A Type J plug has two round pins (4mm diameter) plus offset grounding pin (center pin 10mm from others), and is grounded. A Type M plug has three large round pins in triangular pattern (earth 8.7mm diameter, live/neutral 7.1mm diameter), and is grounded. The quickest tell is pin size and spacing — compare the two pin configurations above. Also see type B vs type J plug.