DC Power Adapter - 9V, 2A

Questions & Answers

How can I determine whether this power adapter is compatible with my device?
To determine whether this power adapter is compatible with your device, verify that the voltage and connector type match the device requirements exactly. The power adapter's current (amperage) rating must be equal to or greater than the current required by the device. Explanation: When selecting a replacement or external power adapter, three specifications must be verified: Specification Requirement Voltage (V) Must match the device requirement exactly Connector Type Must match the device power input exactly Current (A or mA) Must be equal to or greater than the device requirement Using the incorrect voltage or connector type can prevent the device from operating correctly and may damage the device. The power adapter's current rating indicates the maximum current it can supply. A higher current rating is acceptable because the device will only draw the amount of current it requires. However, the adapter must be capable of supplying at least the minimum current required by the device. Before purchasing a power adapter, consult the device specifications or the original power adapter label to verify the required voltage, connector type, and current rating.

What DC barrel connector power plug types do StarTech.com products use, and what are their dimensions?
StarTech.com DC barrel connector plug types are defined in the “Plug Type” field of the technical specifications, using a letter code that specifies the connector’s outer diameter (OD) and inner diameter (ID) in millimeters for power adapter compatibility. Explanation: In StarTech.com technical specifications, the “Plug Type” field is a standardized identifier for the exact DC barrel connector size required to power a product. Each plug type is assigned a letter code that corresponds to a specific combination of outer diameter (OD) and inner diameter (ID), measured in millimeters. Common DC barrel plug type dimensions Plug Type OD ID A 2.35 mm 0.7 mm B 4.0 mm 1.7 mm C 4.75 mm 1.7 mm H 3.4 mm 1.3 mm L 5.0 mm 2.5 mm M 5.5 mm 2.1 mm N 5.5 mm 2.5 mm The DC barrel connector plug type must match both the outer diameter and inner diameter exactly. A mismatch between the StarTech.com product requirement and the power adapter connector can prevent proper fit or stable power delivery, which may result in device startup failure or intermittent operation. The plug type defines only the physical connector size. The plug type does not define electrical power requirements such as voltage, current, or polarity. The power adapter used with a StarTech.com product must match the product’s specified electrical requirements. Using an incompatible power adapter can cause device malfunction or permanent damage. This standardized DC barrel connector plug type system enables IT professionals and procurement teams to verify connector dimensions, ensure power adapter compatibility, standardize hardware deployments, and identify the correct replacement power supply for StarTech.com products.