The M50-3901042 is a pin header from the M50 series, intended for board-to-board connections requiring a 1.27mm pitch. It features a high-temperature thermoplastic housing rated to UL94V-0 and utilizes copper alloy contacts with a gold flash finish on the contact area and 100% tin on the tails. This connector is rated for 1A of current per contact, has an initial contact resistance of 20mΩ maximum, and a minimum insulation resistance of 1,000MΩ. Engineered for reliability in various environments, it operates from -40°C to +105°C and can withstand 30G of shock and vibration up to 3.13Grms.