89891-402H

Insulation Color:	Gray
Contact Finish Thickness - Post:	78.7µin (2.00µm)
Contact Material:	Phosphor Bronze
Contact Shape:	Square
Insulation Material:	Thermoplastic, Glass Filled
Applications:	Automotive, General Purpose, Industrial, Telecommunications
Voltage Rating:	--
Current Rating:	--
Features:	--
Ingress Protection:	--
Mated Stacking Heights:	--
Contact Finish - Post:	Tin-Lead
Material Flammability Rating:	UL94 V-0
Operating Temperature:	--
Contact Length - Post:	0.114" (2.90mm)
Insulation Height:	0.335" (8.51mm)
Series:	Dubox™
Contact Finish Thickness - Mating:	78.7µin (2.00µm)
Contact Finish - Mating:	Tin-Lead
Fastening Type:	Push-Pull
Termination:	Solder
Mounting Type:	Through Hole
Row Spacing - Mating:	0.100" (2.54mm)
Number of Rows:	2
Pitch - Mating:	0.100" (2.54mm)
Number of Positions Loaded:	All
Number of Positions:	4
Style:	Board to Board
Contact Type:	Female Socket
Connector Type:	Receptacle, Bottom or Top Entry
Part Status:	Obsolete
Packaging:	Bulk

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The 89891-402H is part of a family of rectangular connectors from Amphenol. These connectors are widely used in various applications and industries, from medical and consumer electronics to industrial automation and military/aerospace. They are known for their reliability, durability, and excellent performance. This article will focus on the application field and working principle of the 89891-402H.The 89891-402H is a standard, polarized female header connector with terminals and soldering tabs in a two-hole arrangement. It is part of the 89891 connector series, which is available in a wide variety of sizes. It is designed for through-hole applications, and features two rectangular, through-hole fingers for each terminal. The female header is designed to work with a compatible male header, such as the 89891-502H.The 89891-402H has a very versatile application field, as it can be used in a variety of circuits and systems. It can be used in data communications, medical equipment, automotive systems, audio/video, LAN, PC peripherals, industrial control and instrumentation, consumer electronics, aviation and military applications. Its standard polarized design also ensures high contact reliability when mated with the corresponding male header. It also meets the requirements of both commercial and industrial-grade standards.As for its working principle, the 89891-402H uses a pin-in-socket type of connection. The pins are inserted into the corresponding sockets in the female header, after which they are secured by soldering the tabs in place. The sockets feature a reverse-polarity design, meaning that if a reverse-polarity pin is inserted into the socket, it will not make contact with the corresponding terminal. This ensures that the circuit is properly protected from accidental reverse connections.In summary, the 89891-402H is a standard, polarized female header connector with terminals and soldering tabs in a two-hole arrangement. It can be used in a variety of circuits and systems, and features a reverse-polarity design to ensure proper connection and protection. Its high reliability and excellent performance make it a popular choice for many applications, such as data communications, medical equipment, automotive systems, and more.

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