Adafruit
2.1mm DC Barrel Jack to 1st Generation MagSafe Adapter
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$15.05
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In stock at supplier
A passive adapter with a 1st-generation MagSafe plug on one end and a 5.5 mm / 2.1 mm DC barrel jack (centre-positive) on the other. It lets you connect a 15...
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A passive adapter with a 1st-generation MagSafe plug on one end and a 5.5 mm / 2.1 mm DC barrel jack (centre-positive) on the other. It lets you connect a 15–20 VDC barrel-jack power supply to devices that use the original MagSafe connector — useful for bench testing, custom power setups, or replacing a lost charger with a compatible DC supply.
Key Features
- 1st-Gen MagSafe Plug – Fits original MacBook, MacBook Pro, and MacBook Air MagSafe 1 ports
- 5.5 / 2.1 mm Barrel Jack – Centre-positive polarity, accepts standard DC supplies
- Passive Adapter – Straight-through connection with no active circuitry
Warning: This adapter contains no voltage regulator or protection circuit. An incorrect power supply, wrong polarity, or wrong voltage can permanently damage your laptop. Use a multimeter to verify the correct voltage on the MagSafe pins before connecting to any device. Recommended for experienced users only.
Ideal For
- Powering 1st-gen MagSafe devices from a bench DC supply
- Custom charging setups where the original charger is unavailable
- Electronics prototyping and testing
Package Contents
- 1× 2.1 mm DC Barrel Jack to 1st-Gen MagSafe Adapter
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
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