M50-3902042

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Rectangular Connectors – Headers, Male Pins – are the most common connectors for a range of products from hobby electronics to professional electronics markets. One of the most popular is the M50-3902042 series Connector, typically used in automotive, medical and industrial electronics applications. This series connector offers high performance, robustness and flexibility for making connections between an electrical device and a PCB (Printed Circuit Board).

M50-3902042 connectors are a type of rectangular connectors with two rows of two poles each, fitted with a nut on each side to provide power and/or signal connections. The male and female plugs are differentiated by the length of their respective pins (male pins are shorter than female pins). The “M” in the name designates it as a male connector, while the “F” designates the plug as a female connector. The number following the designation (in this case, 3902042) is the nominal size of the pins in millimeters (the M50-3902042 pin size is 3.9 x 2.04mm).

The most common M50-3902042 connectors are designed for internal connections of circuits where only one side is to be soldered. However, they can also be used for other kinds of connections like board-to-board, wire-to-wire, and wire-to-board. Assemblies include several components, such as the connector body, the contacts, the insulators, the receptacle (if used) and the screws for installation.

M50-3902042 connectors are most commonly rated for a 5A current capacity, and fully compliant with up to 16V AC/DC. The plugs have a robust high temperature plastic housing, pressure-molded with phosphor bronze pins to ensure reliable contact.- Pins can extrude solid wire with a diameter range from 28 gauge (0.081mm) to 20 gauge (0.508mm).

The contact area of the M50-3902042 connector is gold-plated, offering superior quality in signal transfer compared to standard plated connectors. This allows for a tight connection when the male and female components are joined together. The contacts of the pins are contact-based to ensure secure mating. The contacts are also corrosion-resistant, due to the gold-plating, and provide low levels of contact resistance.

The M50-3902042 connector is integrated with a metal tab located on its outer surface, to provide a stronger mechanical connection when present. The tab prevents the connectors from being separated after they are mated. Additionally, the male and female connectors are color-coded for convenience when connecting and disconnecting. This series offers multiple pin configurations, from 2 up to 16 pins.

The working principle of the M50-3902042 Rectangular Connectors is simple: when the two plugs are joined, the male pins are inserted into the female receptacle, making an electrical contact. This connection then allows the transfer of electrical signals, power, data, or a combination of them. The insertion of the male pins will cause a male contact to press against a contact spring in the female connector. This further helps to maintain the connection and provides increased contact reliability.

M50-3902042 rectangular connectors are often used in automotive, medical and industrial electronic applications, where extra power and signal lines are needed. They are also widely used in other markets, such as computer peripherals, home appliances, consumer electronics, and as a replacement for DIN-style connectors. The M50-3902042 connectors are cost-effective, easy to install and readily available.

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