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DC Jack Selection Guide: Barrel Sizes, Polarity and Current Rating
Barrel jack sizes, the 2.1 versus 2.5 mm trap, centre polarity conventions, switching contacts, and when USB-C PD is the better answer.
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Expert insights, guides, and engineering resources to help you design reliable connections for any application.
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Connector Basics
DC Jack Selection Guide: Barrel Sizes, Polarity and Current Rating
Barrel jack sizes, the 2.1 versus 2.5 mm trap, centre polarity conventions, switching contacts, and when USB-C PD is the better answer.
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Connector Basics
Audio Jack Connector Guide: TRS, TRRS, Wiring Standards and Detection Switches
TRS versus TRRS, CTIA versus OMTP wiring, detection switches that tell a headset from headphones, and the mechanical details that prevent scratchy jacks.
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Connector Basics
SD Card Socket Selection: Contact Rows, Ejectors and the SD Express Ceiling
Why a single-row socket caps you at UHS-I speeds, how SD Express uses the second contact row, and how to pick an ejector that survives the product.
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Connector Basics
SIM Card Connector Selection: 2FF, 3FF, 4FF and the eSIM Transition
How to choose between 2FF, 3FF and 4FF SIM sockets: contact count, ejector mechanisms, contact force limits, and what eSIM actually changes.
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Connector Basics
Connector and Fuse Pairing: Why Quality Power Distribution Connectors Need Quality Bussmann Fuses
Power distribution systems live or die by the quality of two components working together: the connector that carries the current, and the fuse that protects it. Specifying premium industrial connectors without pairing them with proper overcurrent protection is a common design mistake that costs industrial customers millions in unplanned downtime and equipment damage each year. […]
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Connector Basics
Connector Temperature Ratings: Derating and Material Limits
Understand connector operating temperature, current derating and solder-process limits, and learn which evidence to request before selecting a part.
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Connector Basics
Pogo Pin Connector Design: Travel, Force and Current
Design reliable pogo pin interfaces by checking working travel, tolerance stack-up, contact force, current, mating pads and cycle-life evidence.
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Connector Basics
Industrial Ethernet Connectors: RJ45, M12 and M8 Compared
Compare RJ45, M12 D-coded, M12 X-coded and Ethernet-specific M8 interfaces by speed, environment, cabling and installation needs.
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Cable Assembly Knowledge
Cable Assembly Best Practices: Crimping, Shielding and Tests
Improve cable assembly reliability with controlled wire preparation, validated crimps, strain relief, shield termination and a defined test plan.
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