Type O Plug Adapters
Traveling from the US? A type O adapter will allow you to connect your US (type A/B) plugs to a type O outlet.
For Use in: Thailand (3 Pin grounded).
Compatibility
Compatible with: Type O outlets only. Type C plugs (ungrounded) are compatible with type O outlets. Type E & F plugs will also fit but will not make a ground connection which is unsafe. Hybrid outlets that will accept American type A and B plugs are common but beware as the voltage in Thailand is 230V.
See our full plug & outlet compatibility table for further information.
Other Adapter Types
Planning a trip to Thailand? Explore our type O power adapters below. These Thai grounded plug adapters are all compatible with US type A/B plugs and will keep your devices powered and charged while you're abroad. Many include integral USB, USB-C and some have high power PD ports for laptop charging. Multiplug extension strips can also be a convenient way to connect several devices.
Countries Where Type O Plugs are Used
Thailand.
Frequently Asked Questions
Type O Travel Adapters
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Exclusively: Thailand.
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A type O travel adapter will convert your American (type A/B) plugs to a 3 prong (grounded) configuration that will fit the type O outlets found in Thailand. They do not convert the voltage or frequency of the electrical supply.
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They are very common because it is the official Thai standard outlet. Hybrid outlets that accept type A, B, C and O plugs are however very common.
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Yes, many type O adapters have integral USB, USB-C and sometimes PD ports.
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No, universal adapters do not have a type O plug.
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Yes, they are cross compatible and can be used safely although the type C prongs are slightly smaller than type O plugs (4mm vs 4.8mm). Type C plugs are 2 prong (ungrounded) and are therefore not suitable for connecting grounded appliances.
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Here's a picture of a Type O plug adapter.
