Everything that matters, at a glance.
Pin layout, voltage, amperage, dimensions — the technical details for Type O in one tidy table.
Thailand developed Type O to solve the problem of tourists bringing various plug types. Rather than forcing visitors to use adapters, Thailand created a universal outlet that accepts multiple plug standards while maintaining safety with a grounding option.
Type O outlets feature a recessed design with a grounding option. The versatile socket design accepts multiple plug types but maintains safety standards. Modern Thai outlets include child safety shutters.
Type O outlets accept Type A, B, C, and O plugs. This makes Thailand one of the most adapter-friendly countries for travelers. However, Type G (UK) and some European grounded plugs may still require adapters.
1 countries use Type O.
Mostly across Southeast Asia. Click any country for the full guide — voltage, adapters, and travel essentials for that destination.
Routes to and from Type O countries.
Country-to-country adapter guides for the most common trips involving Type O destinations.
Other plug types worth a look.
Neighboring plug types — same region, related shapes, or shared voltage zone. Useful when your trip has multiple stops.
Adapters travelers actually pack for Type O.
Three picks tested against Type O outlets — universal options that also work in 150+ other countries.
45W Universal Travel Adapter, European Travel Plug Adapter with PD&QC Fast Charging(2 USB-A & 3 USB-C Ports) - Worldwide Travel Essentials, International Power Adapter for UK/US/AU
Compact universal adapter with 4 USB ports and 1 USB-C. Works in US, EU, UK, AU.
Universal Travel Adapter Kit – 2 USA sockets, USB-A, USBC, 1x PD 35W USB-C and USBC Cable, Surge Protected, Plugs for EU, UK, China, AU, Japan - for Laptop, Phone, Camera-ETL Tested
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Will my devices work? Run the check.
Type O runs at 220V, 50Hz. See exactly which of your devices plug in safely and which need a converter.
Every plug type, in one place. All 15.
Type A through Type O — what they look like, where they're used, which countries share them. The full reference our visitors come back to most.
Keep going. Explore further.
The other guides on PlugHopper that travelers find most useful when they're planning a trip.
Side-by-side database with shape, voltage, countries.
Why some chargers blow up and others don't — the dual-voltage rule.
The 30-second test that tells you which devices need which.
How the world ended up split between 110V and 240V.
Tested picks from universal kits to single-route adapters.
110V vs 230V and what it means for your devices.
What is the Type O plug?+
Type O is the official standard plug for Thailand. It's a hybrid system that can accept plugs from many different countries including Type A, B, C, and O itself. The Thai outlet is designed to be highly versatile for tourists.
Which countries use Type O?+
Type O is used in Thailand and across Southeast Asia. See the full list below.
Is the Type O plug grounded?+
Yes. Type O has a dedicated grounding pin for safe operation with appliances that require an earth connection.
Do I need a voltage converter for Type O countries?+
Type O countries operate at 220V, 50Hz. Modern dual-voltage electronics (phones, laptops, cameras labelled "100-240V") work everywhere with just a plug adapter. Single-voltage appliances from a different voltage zone need a converter.
Can I use my iPhone or laptop charger with Type O?+
Yes. Apple chargers and most laptop power supplies are dual-voltage (100-240V), so they work in Type O countries with just a plug adapter — no converter needed.
Going somewhere that uses Type O? Pluggy packs the rest.
Tell Pluggy where you're going and we'll build a packing list — weather, the right adapter, eSIM, what to leave at home.
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