20X2 Female Berg Strip SMD Header (2.54mm Pitch)

Description The 40-Pin (20x2) Double Row Female SMD Header (commonly known as a Berg Strip) is an essential surface-mount connector designed for compact and high-density printed circuit boards (PCBs). Utilizing the industry-standard 2.54mm (0.1") pitch, this double-row socket is perfectly sized to mate with standard 2.54mm male headers, allowing you to create secure, removable board-to-board connections. Available at Tomson Electronics, this specific header features a Surface Mount (SMD) design rather than traditional through-hole pins. The contact legs are bent outward (gull-wing style) to sit perfectly flat against surface mount soldering pads, making it ideal for double-sided PCBs where you cannot afford to have pins protruding through the bottom of the board. With a 2x20 configuration (40 pins total), it is widely used in custom microcontroller shields, compact IoT modules, and automated manufacturing assemblies. People also search for: 20x2 female smd header, 40 pin double row female header, 2.54mm smt berg strip, surface mount female socket, 2x20 pcb receptacle. Specifications Number of Pins: 40 Row Configuration: Double Row (2 × 20) Pin Pitch (Spacing): 2.54 mm (0.1 inches) Gender: Female Mounting Type: Surface Mount (SMD/SMT) Orientation: Straight (Vertical) Contact Material: Phosphor Bronze / Copper Alloy Insulator Material: High-Temperature Thermoplastic (UL94V-0 Rated) Contact Resistance: ≤ 20mΩ Applications Compact PCB Design: Serving as low-profile board-to-board connectors in miniaturized consumer electronics or custom embedded systems where through-hole pins are not an option. Custom Shields & Modules: Creating removable daughterboards for ESP32, Arduino, or custom ARM Cortex microcontrollers. Automated Assembly: Ideal for pick-and-place machines and reflow soldering ovens due to its flat surface-mount contacts and high-temperature plastic body. Frequently Asked Questions (FAQ) Q: Can I easily cut this double-row strip into smaller pieces? A: Unlike single-row breakaway male headers, cutting double-row female headers cleanly can be quite difficult. Slicing through the plastic often destroys the contact pins directly on the cut line. If you must cut it, we recommend using a sharp craft knife or fine saw, sacrificing one row of pins, and then sanding the edge flat. Q: Will this fit on a standard solderless breadboard? A: No. Because this is a Surface Mount (SMD) component, the pins are bent flat to sit on top of a PCB. It does not have the straight, elongated pins required to plug into a standard through-hole breadboard. Q: What is the benefit of using an SMD header instead of a through-hole header? A: SMD headers are crucial when you have a double-sided PCB and need to place components directly underneath the header on the opposite side of the board. Since there are no holes drilled through the board, the bottom layer remains completely free for other traces or parts. Package Includes 1 × 40-Pin (20x2) Double Row Female SMD Header (2.54mm Pitch)