DC Barrel Jack Male to 2-Pin Press Terminal Block Adapter
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Prices updated: 13 Oct 2026
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About this product
This adapter converts a 5.5 x 2.1 mm DC barrel plug into a two-pin press terminal block with about 5 mm (0.2 in) spacing. The terminals are marked positive and negative, and the positive terminal connects to the plug's centre contact, which makes it easy to wire a DC supply into a circuit.
Specifications
- Plug type
- DC barrel plug, male 5.5 x 2.1 mm
- Terminal type
- 2-pin press terminal block
- Terminal spacing
- Approx. 5 mm (0.2 in)
- Polarity
- Centre contact positive; terminals labelled +/-
Frequently asked questions
Which polarity should I use?
The centre contact of the barrel plug is positive, and the terminal labelled positive connects to it. Verify your adapter's polarity before wiring, since not every adapter is centre-positive.
Will it fit any DC power adapter?
It matches only the 5.5 x 2.1 mm barrel size. Confirm that your adapter's plug is this size, and that its output voltage and current suit your circuit.
