Barrel - Adapters

Image	Part Number	Description / PDF	Quantity	Rfq
	BPJJ03 Switchcraft / Conxall	ADAPT RCA JACK TO RCA JACK	0
	EHRCA2PKG Switchcraft / Conxall	ADAPT RCA JACK TO RCA JACK	0
	EHRCA2 Switchcraft / Conxall	ADAPT RCA JACK TO RCA JACK	0
	BPJJ02AU Switchcraft / Conxall	ADAPT RCA JACK TO RCA JACK	0
	BPJJ02 Switchcraft / Conxall	ADAPT RCA JACK TO RCA JACK	0
	EHRCA2BPKG Switchcraft / Conxall	ADAPT RCA JACK TO RCA JACK	0

Barrel - Adapters

1. Overview

Barrel adapters are cylindrical electrical connectors primarily used for power transmission and signal routing. Their simple design features a concentric conducting surface separated by an insulating layer. These components play a critical role in modern electronics by enabling reliable connections between power sources and devices, with emerging applications in signal integrity management and industrial automation systems.

2. Major Types and Functional Classification

Type	Functional Characteristics	Application Examples
Power Barrel Adapters	High current capacity (up to 5A), threaded locking mechanisms	Laptop power supplies, industrial machinery
Signal Barrel Adapters	Coaxial design for RF signals (up to 6GHz), 50/75 impedance	Test equipment, communication systems
Miniature Barrel Adapters	Diameter <8mm, low profile design	Portable devices, medical sensors
USB Barrel Combinations	Hybrid power/data transmission, USB 3.1 compatibility	IoT devices, charging docks

3. Structural Composition

Typical construction includes:

Cylindrical conductive sleeve (phosphor bronze with nickel plating)
Center pin contact (beryllium copper with gold plating)
Polymer insulation layer (UL94 V-0 rated)
Threaded mechanical interface (metric/imperial standards)

Advanced versions incorporate EMI shielding layers and IP67-rated sealing gaskets.

4. Key Technical Parameters

Parameter	Significance	Typical Range
Current Rating	Determines thermal performance	0.5-10A DC
Contact Resistance	Affects power efficiency	5-30m
Dielectric Strength	Safety isolation capability	500-1500VAC
Insertion Loss	Signal integrity metric	0.1-1.5dB @1GHz
Mating Cycles	Durability specification	1,000-10,000 cycles

5. Application Fields

Primary industries:

Consumer Electronics (power adapters, audio equipment)
Industrial Automation (PLC interfaces, sensor hubs)
Telecommunications (RF amplifiers, base stations)
Medical Devices (diagnostic equipment, patient monitors)
Automotive (EV charging ports, infotainment systems)

6. Leading Manufacturers and Products

Manufacturer	Product Series	Key Specifications
TE Connectivity	Power Barrel 796109	12A rating, IP68 sealing
Amphenol	Coaxial CA Series	6GHz bandwidth, 50
Molex	Mini-Fit Jr. 48471	9.0A capacity, polarization keys
Samtec	USB Barrel Hybrid	USB 3.1 Gen 2, 3A power

7. Selection Guidelines

Key considerations:

Current/voltage requirements with 20% safety margin
Environmental factors (temperature range, vibration levels)
Space constraints (panel cutout dimensions)
Compliance standards (CE, UL, RoHS)
Termination method (solder, crimp, PCB mount)

Example: For outdoor LED displays, select IP67-rated adapters with silver-plated contacts to prevent corrosion.

8. Industry Trends

Development directions:

Miniaturization (sub-5mm diameters for wearable devices)
High-power variants (20A+ for electric vehicle charging)
Smart connectors with integrated current sensing
Material innovation (graphene-coated contacts for reduced resistance)
Standardization efforts (IEC 61056 harmonization)