22 (20 + 2 Power) Position Connector Header, Outer Shroud Contacts Surface Mount Gold

The BM24-20DP/2-0.35V(51) is a board-to-board and board-to-FPC header connector manufactured by Hirose Electric. It belongs to the BM24 series, a family of fine-pitch hybrid power and signal connectors designed for applications that require both data signaling and supplementary power delivery within the same compact interconnect, eliminating the need for a separate dedicated power connector alongside the signal interface. The connector functions as the plug (header) half of a mating pair, intended to mate with a corresponding BM24 receptacle to join two printed circuit boards, or a printed circuit board and a flexible printed circuit, in a low-profile board-to-board arrangement. This part number designates a configuration with a defined signal contact count supplemented by additional dedicated power contacts, reflecting the series' hybrid design philosophy in which the majority of positions handle signal or data lines while a smaller subset of positions is reserved for carrying higher current to support onboard power rails. This arrangement is particularly useful in compact consumer devices such as smartphones, wearables, and camera modules, where both data interfaces and local power distribution must be routed across a board-to-board junction without dedicating separate connectors to each function. The series is positioned by Hirose as supporting high-speed signaling standards including USB interfaces, making it suitable for applications that combine high-speed data transmission with power delivery in a single compact connector footprint. The connector's fine contact pitch and low mated height make it well suited to thin, space-constrained form factors where minimizing both footprint area and stack height is a priority. As with other Hirose board-to-board offerings, the connector is non-polarized in its base mechanical design, and it is supplied on embossed carrier tape for automated pick-and-place assembly, with construction compliant to RoHS material restrictions. Mechanically, the header is built to withstand the repeated mating cycles typical of consumer electronics manufacturing, rework, and field service, while maintaining stable, low-resistance contact across both its signal and power contact paths under realistic vibration and thermal conditions. As a header-style connector, it is intended to be soldered directly to a host PCB, with its mating receptacle counterpart soldered to the opposing board or FPC, allowing the assemblies to be joined and separated as needed throughout the product lifecycle.

Spec Sheet Identification

Part Number: BM24-20DP/2-0.35V(51) Series: BM24 Connector Style: Hybrid power/signal board-to-board and board-to-FPC connector

Connector Type / Configuration

Type: Header (plug) Gender: Male Orientation: Straight, surface mount Contact Arrangement: Hybrid configuration combining signal contacts and dedicated power contacts Polarization: Non-polarized

Electrical Ratings

Applicable High-Speed Protocols: USB2.0, USB3.0, USB3.1 (series capability) Transmission Rate: High-speed, multi-gigabit class (series capability) Power Contacts: Dedicated higher-current contacts integrated alongside signal contacts

Mechanical Specifications

Contact Pitch: Fine pitch Mounting Pitch: Matches contact pitch Mated Height: Low-profile Mounting Method: Surface mount technology (SMT) Mating Cycles: Rated for repeated mate/unmate cycles typical of consumer electronics assembly and rework

Contact & Material Properties

Contact Plating (Mating Area): Gold Insulator Material: High-temperature engineering resin suitable for SMT reflow

Environmental Ratings

RoHS Compliance: Yes

Packaging

Packaging Format: Embossed carrier tape, reel format Packaging Code Meaning: Suffix denotes embossed tape packaging at a standard reel quantity

Mating Compatibility

Mates With: Corresponding BM24 series receptacle connector Application Note: Intended for hybrid power and signal board-to-board or board-to-FPC interconnection in compact consumer electronics

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