2.54mm pitch IDC Closed End Type connector series DH2541-XP

The 2.54mm pitch IDC Closed End Type Connector series is a family of insulation displacement connectors designed for mass termination of discrete wires or ribbon cable in wire-to-board and wire-to-wire applications. These connectors are based on IDC (Insulation Displacement Contact) technology, which eliminates the need for wire stripping by using slotted contacts that cut through the wire insulation and make electrical contact with the conductor in a single assembly step. The 2.54mm (0.100") pitch spacing is an industry-standard centerline inherited from legacy DIP and breadboard systems, ensuring broad compatibility with a wide range of PCB headers and mating connectors. The defining characteristic of this series is its Closed End (or Closed-end) housing design, where one end of the connector body is sealed, providing enhanced wire retention and strain relief. This design distinguishes it from feed-through or "daisy chain" configurations, which allow wires to pass through the connector. The series is represented by industry-leading product lines such as TE Connectivity's MTA-100 (Mass Termination Assembly) series and the AMPMODU MTE series.

 

The Closed End configuration is a critical mechanical feature of this connector series. In a closed end IDC connector, the housing features a sealed termination cavity that fully encloses the wire end after assembly. The connectors are pre-loaded with dual-beam slotted IDC contacts made from copper alloy, with contact platings available in tin over nickel or gold over nickel depending on the specific model and application requirements. The contacts are lubricated during manufacturing to prevent fretting corrosion and ensure long-term reliability. The connector housing is molded from high-performance thermoplastic materials—typically nylon—with UL94V-2 or UL94V-0 flame retardancy ratings. The closed end connector series is available in single-row configurations with contact positions ranging from 2 to 28 positions, accommodating various wire gauges from 28 AWG to 22 AWG. Additional features include molded polarizing ribs to prevent reverse mating, locking ramps for secure connection to PCB headers, and optional polarizing tabs for extra alignment during assembly. The connectors are color-coded according to wire size—for example, white housings typically indicate 24 AWG compatibility, while red housings may indicate 22 AWG.

 

The 2.54mm pitch IDC Closed End connector series delivers robust electrical performance suitable for a wide range of low-power and signal applications. Electrical characteristics include a current rating of 5 Amperes per contact, a voltage rating of 250 VAC, and an operating temperature range from -55°C to +105°C. Contact resistance is specified at 6 milliohms maximum, while insulation resistance reaches 5000 megohms minimum. The IDC termination method allows for one-step assembly using simple hand tools or production tooling, significantly reducing assembly time and labor costs compared to traditional crimp or solder termination methods. The wire insulation is displaced during termination, creating a gas-tight connection that is resistant to corrosion and vibration. Connectors are available in both straight (180°) and right angle (90°) cable exit orientations, providing flexibility for different cable routing requirements within electronic enclosures. The closed end design supports end-to-end stacking of multiple connectors along a cable run, making it suitable for daisy-chain configurations while maintaining individual connection integrity.

 

The 2.54mm pitch IDC Closed End Type connector series is widely deployed across multiple industries requiring reliable, cost-effective mass termination of wires. Primary application areas include industrial control systems (PLC modules, I/O interfaces, and industrial machinery), automotive electronics (body systems, chassis systems, driver information, and safety/security systems), consumer electronics (desktop PCs, notebooks, servers, and storage devices), household appliances, and telecommunications equipment. The MTA-100 series is recognized by UL and CSA, ensuring compliance with international safety standards. Major manufacturers of this connector type include TE Connectivity (MTA-100 series, AMPMODU MTE series), Molex, and other industry suppliers. Representative part numbers include 3-640441-4 (4-position, 24 AWG, tin-plated receptacle) and 103948-2 (3-position, gold-plated plug). In summary, the 2.54mm pitch IDC Closed End Type connector series offers a proven, labor-saving interconnect solution that combines the reliability of IDC termination technology with the mechanical advantages of closed end housing design, making it an industry standard for mass termination applications across industrial, automotive, and consumer electronics sectors.