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Curious Inventor - Store: Barrel Power Connector
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in stock - price: $0.59
Barrel Power Connector

short description:

This is the male connector most commonly used with Wall Wart power supplies. The male pin is positive, 2.1mm ID, 5.5mm OD,

more information and instructions:

Rated at 24V @ 5A. RoHS Compliant (lead-free). spec sheet.