Description
2.1mm x 5.5mm Female DC Power Jack Panel Mount Socket
Product Overview
The 2.1mm Female DC Power Jack Socket (commonly known as a barrel jack receptacle) is the industry-standard interface component engineered to establish clean, reliable low-voltage DC power inputs on electronic enclosures, control panels, and custom equipment chassis. Featuring a standard 2.1mm center pin enclosed in a 5.5mm outer sleeve socket, this component allows hardware assemblies to accept direct power from ubiquitous commercial AC/DC wall adapters and benchtop power supplies.
Designed for rugged panel mounting, this jack features an all-threaded exterior body or a flanged layout secured firmly via a rear hex nut, ensuring it remains perfectly stationary during repeated plug insertion and extraction cycles. Outfitted with heavy-duty solder tabs—including an integrated internal shunt/break switch pin—this component offers versatile routing options for battery backup switching or basic power input configurations.
Key Features
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Universal 2.1mm x 5.5mm Dimensions: Precision-engineered to form a tight, snap-fit mechanical connection with matching standard 2.1mm male barrel plugs, entirely eliminating intermittent power dropouts.
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Threaded Panel-Mount Chassis: Equipped with a dedicated backing washer and heavy hex nut that locks the socket firmly into pre-drilled enclosure faces, preventing rotation or loose wobbling.
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Integrated Internal Shunt Switch: Features a clever three-pin contact layout that automatically disconnects an internal battery circuit when a male DC wall plug is inserted, switching the system seamlessly to external power.
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High-Temperature Thermoplastic Body: Molded from premium, impact-resistant insulation polymer that effortlessly withstands high soldering iron heat without warping structural pin alignment.
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Spring-Loaded Contact Sleeves: Outfitted with high-elasticity internal leaf-spring contacts to guarantee uniform gripping pressure and low contact resistance over thousands of usage cycles.
Technical Specifications
| Parameter | Specification |
| Component Type | Panel Mount Female DC Barrel Jack Receptacle |
| Pin Dimensions | 2.1mm Center Pin Inside Diameter (ID) x 5.5mm Outside Diameter (OD) |
| Pin Configuration (Poles) | 3 Pins (Center Pin, Outer Sleeve, and Internal Shunt/Switch Pin) |
| Mounting Cutout Diameter | Standard 11.0mm to 12.0mm Panel Hole (Variant specific) |
| Termination Style | Rear Metal Solder Lugs / Tabs |
| Material (Housing) | Flame-Retardant High-Temp Engineering Thermoplastic |
| Material (Contacts & Pin) | High-Conductivity Brass Alloy, Silver or Nickel-Plated |
| Rated Operating Voltage | 12V to 30V DC Max |
| Rated Current Load | 3A to 5A Continuous Max (Depending on model variant) |
| Contact Resistance | $\le 0.03\,\Omega$ ($30\,\text{m}\Omega$) |
| Insulation Resistance | $\ge 100\,\text{M}\Omega$ at 500V DC |
| Dielectric Strength | 500V AC for 1 Minute |
Applications
The universal standard power interface for industrial enclosures, embedded hardware modules, and commercial electronic frames:
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Enclosure Mains DC Power Inputs: Serving as the primary power entry node on 3D-printed cases, custom aluminum project boxes, and automated control structures to pipe in 5V, 12V, or 24V DC lines safely.
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Battery-to-Wall Power Switching: Utilizing the integrated shunt pin to create automatic power-selection circuits that bypass internal battery packs the moment an external power adapter is plugged in.
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Industrial Automation & Robotics Lab Modules: Providing an easily disconnectable, rugged power input node for localized relay boards, sensor array panels, and motor control enclosures.
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DIY Bench Equipment Prototyping: Ideal for modifying or building variable switching DC power supply boxes, logic trainer kits, and dedicated battery-charging bays.
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