5521 male/ 7450 female angle connector

Description

This is a 90-degree right-angle power adapter that converts a DC 5.5×2.1mm male connector to a 7.4×5.0mm female connector. It is also commonly known as the “Dell laptop power adapter adapter”, and it is an excellent solution for addressing the mismatch between old power supplies and new device interfaces.

Core Specifications and Functions
Interface Specification Explanation
Male Connector: 5.5×2.1mm (also known as “5521 Male Connector”), this is the most common DC power interface found on routers, surveillance systems, LED strips, and universal adapters.
Female Connector: 7.4×5.0mm (“7450 Female Connector”), this is a large power interface specifically for Dell (and some HP) laptops, with a middle pin design.
Right Angle Design: At the same time, the straight-in power has been changed to a 90-degree outlet, solving the problem of equipment being placed against the wall or in a narrow desk space, and also protecting the power cord from being crushed.

Core Function: Allows ordinary power adapters to be used with Dell laptops
Its core function is: Convert an ordinary 5521 interface power adapter into a 7450 interface that Dell laptops can use.
For example: You have a 19V/3.42A universal power adapter with a 5521 male connector. Through this adapter, you can plug it into an older Dell laptop to supply power, without having to buy an original power adapter separately.
Many models with pins can also simulate the identification signal of Dell power, allowing the laptop to charge normally and not report errors.

Usage Notes (Key Points to Avoid)
Voltage and Current Must Match: The output voltage of the power adapter must be consistent with the laptop’s requirements (usually 19V), and the current must be greater than or equal to the laptop’s requirements. Otherwise, it will not charge properly or damage the device.
Positive and Negative Connectors Must Not Be Reversed: The DC power interface is usually “external negative and internal positive”. If the polarity of the power is reversed, using it directly will burn the device. When purchasing, be sure to confirm the polarity.
Pin-equipped vs. Pinless Models: Some Dell laptops use the middle pin to identify the original power supply. Pinless models may result in an error message of “power supply cannot be identified”. It is recommended to choose the model with the identification pin first.