The brick for an Xbox 360 S must match the amp rating printed on the console: 10.83 A needs a 135 W unit, 9.6 A needs a 120 W unit.
One wrong brick, and the console sits dark while a green light hums on the power supply. Every Xbox 360 S was built around one of two 12-volt ratings — 10.83 amps or 9.6 amps — and only a brick carrying the same number will do. That is the short version of how to choose the right power supply for an Xbox 360 Slim, and the label settles it, not the shape of the plug.
The two ratings below cover every slim console Microsoft shipped. The checks after them cover the used market, where stickers fade and sellers pair consoles with whatever brick was closest to hand.
Xbox 360 Slim Power Supply: The Two Amp Ratings That Decide It
Two power supplies fit the Xbox 360 S: a 12-volt, 10.83-amp unit sold as 135 W, and a 12-volt, 9.6-amp unit sold as 120 W. Your console’s own label decides which one you need.
Amps times volts gives the wattage number printed on the box. Both are slim-only parts. Neither one fits an original Xbox 360.
| What The Console Label Says | Brick That Matches | Detail That Trips People Up |
|---|---|---|
| 12 V, 10.83 A | 12 V, 10.83 A, sold as 135 W | Pairs with the Trinity board revision |
| 12 V, 9.6 A | 12 V, 9.6 A, sold as 120 W | Pairs with the later Corona revision |
| A higher wattage figure | Not automatically compatible | Connector, voltage, and current all have to match |
| A 120 V, 60 Hz US outlet | US-input brick with a US cord | Imports often ship with a foreign plug |
| Label worn past reading | PSU model number Microsoft lists for that console | Plug shape alone proves nothing |
Microsoft’s instruction for settling the question is to compare the power supply model number against the model number specified for that console. The rating sits on the console’s label, on the back or underside near the serial sticker, printed as a 12V line with an amp figure beside it. Read that same line on the old brick if you still have it.
Does A Higher-Wattage Brick Fit An Xbox 360 Slim?
No. A bigger wattage rating is not an upgrade path, because the connector, output voltage, current capability, and the console’s own electrical design all have to line up.
The slim uses a different power connector than the original 360 brick, so a fat supply won’t seat at all. Switchable-tip universal adapters are the harder trap: a tip that fits says nothing about the voltage and current running through it. Microsoft’s guidance points buyers toward genuine Microsoft power supplies and AC cords, or parts from an authorized repair source, and that is the bar to hold a used listing to.
Five checks settle it before money changes hands:
- Write down the model number, output voltage, amperage, wattage, and input range from the old brick.
- Compare that model number with the one Microsoft specifies for your console — the number, not the plug.
- Match the DC output: 12 V at 10.83 A, or 12 V at 9.6 A.
- Confirm the AC side suits a US outlet at 120 V and 60 Hz, with a detachable cord to match.
- Check the connector and model together before paying; looking similar isn’t proof.
The outlet and cord side of the setup gets the same treatment in Microsoft’s power supply guidance.
If part numbers are wearing you down, the tested Xbox 360 Slim power supply picks shortlist both wattages and note which units ship with a US cord.
Why Won’t The Console Power On?
Microsoft’s first move for a console that won’t start is to plug the power supply into a different wall outlet — and to leave the surge protector out of that test.
The brick’s indicator light carries the diagnosis. A lit light means power is reaching the supply, so the fault sits between brick and console, or inside the console itself. No light at all points at the outlet, the cord, or a dead unit. Microsoft’s troubleshooting covers the indicator light, the power cords, placement, temperature, noise, and electrical safety in that order, which beats swapping parts at random.
Placement deserves more attention than it gets. The brick runs warm, and covering it, sitting it beside a heat source, or wrapping the cord tight around it traps that warmth. Keep other devices out of the chain between supply and console, avoid an overloaded strip, and skip generators or inverters even when their stated voltage looks right.
A damaged brick or frayed cord is a stop sign. Unplug it and replace it rather than taping it up, pull the plug body instead of the cable, and disconnect the console during storms or long stretches of non-use.
Common Questions
Can A 135 W Brick Run A Console That Shipped With 120 W?
Don’t count on it. The wattage number is shorthand for a specific voltage-and-current pair, and the console’s internals are matched to that pair. A 135 W unit carries 10.83 amps rather than 9.6, and the supply has to line up with the model number Microsoft lists for your console. Treat a mismatched brick as the wrong part, not a free upgrade.
Where Is The Rating Printed On A Used Console?
The line sits on the console’s label, on the back or underside near the serial sticker, printed as 12V followed by an amp figure. Read it before buying a replacement, and read the same line on the old brick if you kept it. If the sticker is worn past reading, match the power supply model number Microsoft specifies for that console instead.
Is A Cheap Third-Party Brick Worth The Savings?
Sometimes, if it’s an authorized replacement that matches the rating exactly. Microsoft’s own guidance recommends genuine Microsoft power supplies and AC cords, or parts from an authorized repair source, because a mismatched or badly built brick puts the console at risk. Buy from a seller who states the voltage, amperage, and model number, and who takes returns.
Sources
- Microsoft. “Xbox 360 Power Supply” Covers matching the PSU model number to the console and safety guidance on genuine parts.
- Microsoft. “Check The Power Supply” Outlet testing, surge protector warning, and indicator light troubleshooting.
- Microsoft. “Xbox 360 Console Documentation (PDF)” Console specification reference for matching power supply model numbers.