A comprehensive set of 30 barrel jack plug adapters that convert a standard 5.5mm / 2.1mm DC jack to a wide variety of other tip sizes. Perfect for powering devices that use non-standard barrel connectors from your existing DC power supplies, USB-C to DC cables, or battery packs.

Each adapter plugs smoothly into a 5.5mm / 2.1mm jack and provides a different sized tip. No voltage translation is performed — ensure your device expects the voltage and current capability of your power supply. Polarity is preserved (centre-positive in, centre-positive out).

Key Features

• 30 Different Adapters – Wide range of tip sizes for maximum compatibility
• Standard 5.5/2.1mm Input – Works with common DC wall adapters and battery holders
• Polarity Preserved – Centre-positive input remains centre-positive at the tip
• Includes Laptop Tips – Adapters for Lenovo (round and rectangular) and Dell laptop connectors

Included Adapter Sizes

1. 2.0 × 0.5mm
2. 3.5 × 1.1mm
3. 2.35mm
4. 2.5mm
5. 2.5mm (phono jack)
6. 3.5mm (phono jack)
7. 3.0 × 1.1mm
8. 4.8mm
9. 3.5 × 1.2mm
10. 4.0 × 1.7mm (inner spring tip)
11. 4.8 × 1.7mm (inner spring tip)
12. 5.0mm
13. 5.5 × 2.5mm
14. 5.5 × 2.1mm (inner spring tip)
15. 7.9mm (Lenovo round type)
16. 7.4mm
17. Dell three-contact type
18. 5.5 × 1.9mm
19. 6.0mm (with centre contact pin)
20. 6.3mm
21. 5.5 × 2.5mm
22. 5.5 × 2.5mm (inner spring tip)
23. 5.5 × 2.1mm
24. 5.5 × 2.1mm (inner spring tip)
25. 5.5 × 1.5mm
26. 5.5 × 1.7mm (inner spring tip)
27. 5.0 × 2.1mm
28. 5.0 × 2.5mm
29. 4.5mm
30. Lenovo large rectangular type

Ideal For

• Powering devices with non-standard DC barrel connectors
• Electronics workshops and repair benches
• Matching power supplies to legacy or uncommon equipment

Package Contents

• 30× DC barrel jack plug adapters (various sizes)