Panel-mount DC barrel adapter DELOCK 5.5x2.5 mm to 5.5x2.1 mm, model 91120

DELOCK panel-mount DC barrel adapter 5.5x2.5 mm to 5.5x2.1 mm (model 91120) is a compact mechanical solution for adapting DC power plugs in fixed installations. It accepts an incoming 5.5×2.5 mm plug and provides a 5.5×2.1 mm socket mounted securely in a panel cutout. The adapter is intended for equipment panels, enclosures or cabinets where a reliable, space-saving conversion between common DC barrel sizes is required without modifying existing cables or power supplies.

Advantages

The adapter delivers a stable mechanical mounting and electrical contact for DC power connections while preserving the original cables and connectors. Its panel-mount design prevents strain on the internal wiring and allows a neat, secure installation. Because it converts between two widely used DC barrel dimensions, it reduces the need for replacement power leads and simplifies compatibility between chargers, power supplies and devices.

Suitable for

• Adapting external chargers or power supplies to equipment with a different DC barrel size
• Fixed installation in control panels, enclosures or cabinets
• Field repairs or temporary conversions where replacing cables is not practical
• Prototyping and lab setups requiring interchangeable DC connections

Key specifications

• Input connector size: accepts 5.5×2.5 mm male DC barrel plug
• Output connector size: provides 5.5×2.1 mm female DC barrel socket
• Mounting type: panel-mount, designed for installation in a panel cutout
• Contact type: standard barrel center pin and outer sleeve contact for DC power
• Typical application: low-voltage DC power lines for chargers, adapters and devices
• Construction: metal and/or plated contacts with insulating body for safe mounting

How to use

Prepare a suitable panel cutout according to the adapter outer dimensions, insert the adapter from the front side and secure it with the provided fastening method (nut or mounting ring) so that the connector is fixed flush to the panel. Connect the internal DC power wiring to the rear termination points following the device polarity (center positive or center negative as required). After installation, plug a 5.5×2.5 mm male plug into the adapter to receive power through the 5.5×2.1 mm socket interface. Verify correct polarity and secure electrical connections before energizing the system.

Usage recommendations

Use the adapter only for compatible low-voltage DC applications and ensure the mating plug dimensions match 5.5×2.5 mm for the incoming connector and 5.5×2.1 mm for the outgoing socket. Confirm voltage and current ratings of the connected power source and device are within safe limits for barrel-type connectors. Avoid excessive mechanical force on the mounted connector and periodically inspect contacts for wear or corrosion in demanding environments.