World Power Socket (Plug Type) Comparison Chart

How a travel adapter is actually used

The table above is for the pin shape and the voltage at the destination. When an order is placed, hotels, tour operators, exhibitors and colleagues on the road also ask whether the person receiving it can use it, whether the body is small enough, and whether a logo will print. These are the situations we see most. A travel adapter only changes the pin shape. It does not change the voltage. A phone or laptop charger marked 100–240V can be used once the pins match. A hair dryer or shaver marked only 110V or only 220V should not be forced in as if the adapter were a transformer.

For wattage, GaN and certificates, see the travel adapter buying guide.

Hotel rooms and welcome gifts

The socket in a hotel room is the local international plug. A Hong Kong hotel is Type G, square pins, 220V / 50Hz. A guest arriving from Japan, the United States or continental Europe may not be able to plug their own charger in. A universal adapter in the welcome pack or at the desk is more useful than stocking only a European plug or only a US plug, because the guest’s next stop may not be the same country.

Hotel orders usually turn on four points. Size: it has to fit a gift pack, a drawer or a bag. USB: the room often has one socket, and an extra USB-C lets a phone and earbuds charge together without holding the wall socket. Fuse: a British Type G plug has a fuse inside; if the travel adapter includes a UK pin, a replaceable fuse adds a layer when a room socket makes poor contact. Logo: the face needs enough area for the hotel name to stay readable. A very fine mark goes muddy on a small face. For guests who stay on the continent, a European Type C/F round pin at about 230V / 50Hz already matches Germany and France. A US hotel is Type A/B, 120V / 60Hz.

Tour groups

Travellers on a group tour do not each look up the pin type. Japan is flat pins, continental Europe is round, the UK and Hong Kong are square. One universal plug covers the first night through the last. If the itinerary stays on the continent, a European plug is enough. Add the UK, Singapore or Hong Kong and you need Type G. A European round pin does not go into a square wall socket.

A group model has to be small, because the suitcase is already full. More than one USB is the practical choice: a hotel room or a coach stop rarely has enough sockets to take turns. The agency name on the shell lasts longer than the itinerary sheet. For phones, 20–40W USB-C is enough. If someone on the tour also charges a thin laptop, look at something in the 65W class. A multi-port rating is the total output, not the figure on every port.

Exhibitions and trade shows

At an overseas booth the power is the host city’s international plug, not the plug at head office. Germany, France and Italy use European Type C/E/F, about 220–240V / 50Hz. A US show uses Type A/B, 120V / 60Hz. If the exhibitor’s own charger says 100–240V, a travel adapter with the matching pins is enough. A UK show needs Type G, which does not interchange with a European round pin.

A giveaway at the booth has two extra constraints: it has to be small enough for a handbag, and the logo has to stay readable after the visitor leaves the hall. A USB-C model with PD lets a visitor charge a phone at the stand and still carry your name away. If the same unit then flies on to the next city, universal pins last longer than a single European or US set. Fuse and earth depend on the model. Say which country the show is in when you order, so the pins match.

Business travel and meetings

A day on the road usually means a phone, earbuds, and sometimes a thin laptop. Phone and earbuds: 20–40W is enough. Add the laptop and most people look at 65W GaN, so the body still fits a briefcase. USB PD 3.0 commonly goes up to 100W. The PD 3.1 specification can go to 240W, which gift models rarely reach. Several USB ports share one total output. Two devices together split it.

Japan then the United States: both use flat pins, but the voltage is not the same. Japan is about 100V (50Hz in the east, 60Hz in the west), the United States is 120V / 60Hz, Taiwan is 110V / 60Hz. The charger itself has to accept a wide voltage. Fly on to continental Europe and the pins change to the European round type. Three single-region adapters weigh more than one universal unit, and it is easy to pack the wrong one. A meeting gift handed out in one city only needs that city’s pins. Not everyone needs a full set of international plugs.

Custom travel-adapter projects

Past custom travel-adapter orders include STACCATO, HKMU and a dual-USB travel adapter for China Unicom. Open each one for the model and the photos. To compare current models, start from the travel adapter catalogue.

Questions

What type of travel adapter is usually needed for Europe?

Most European countries (such as Germany, France, Italy, Netherlands) primarily use Type C or Type F two-pin round plugs. However, the UK, Ireland, and Malta use Type G three-pin square plugs.

Can 110V appliances be used directly in 220V countries?

No. If an appliance only supports 110V (like some North American hair dryers), plugging it directly into a 220V outlet will damage it. Unless the device is marked '100-240V Dual Voltage', a voltage converter is required.

What are the major global voltage and frequency standards?

The world is mainly divided into two power systems: 110V-120V / 60Hz (primarily North America, Taiwan, Japan) and 220V-240V / 50Hz (primarily Europe, China, Hong Kong, Australia).

For a hotel giveaway, should you choose a universal plug or a single European or US plug?

The socket in the room is the local pin type, and the guest’s next stop may not be the same country. One universal plug covers the common European round pins, US flat pins, UK square pins and the Australian type. If the guests are mainly from continental Europe, Type C/F is enough. If they are mainly from the United States, Type A/B is enough. A travel adapter only changes the pins. It does not change the voltage.

What actually matters for a tour group or an exhibition giveaway?

Travellers and exhibitors usually charge a phone and a second device at the same time, so more than one USB, preferably with USB-C, is more useful than a single port. The body has to be small enough for hand luggage or a booth gift bag. Hotel and hall sockets vary; a model with a UK pin and a replaceable fuse is the steadier choice. The logo needs a clear spot on the shell, or the organiser’s name does not survive the hand-out.

For a business trip, about how many watts does USB-C PD need?

A phone and earbuds only: 20–40W is enough. Add a thin laptop and most orders look at 65W GaN. A multi-port figure is the total, not the output of every port. Japan, Taiwan and the United States all use flat pins, but the voltage differs: Japan about 100V, Taiwan 110V, the United States 120V at 60Hz. Continental Europe is about 220–240V at 50Hz on the European pins. The charger itself has to be marked 100–240V before a travel adapter can be used directly.