MDM-25SSP-A172

Shell Material, Finish:	Aluminum, Gold Plated
Backset Spacing:	--
Contact Material:	Copper Alloy
Wire Gauge:	--
Housing Material:	Liquid Crystal Polymer (LCP)
Contact Form:	--
Color:	--
Voltage Rating:	--
Operating Temperature:	-55°C ~ 125°C
Current Rating:	3A
Material Flammability Rating:	--
Ingress Protection:	--
Contact Finish Thickness:	--
Contact Finish:	Gold
Series:	83513-Style Micro D Metal Shell (MDM)
Features:	Shielded
Termination:	Solder Cup
Flange Feature:	Mating Side, Female Screwlock (2-56)
Mounting Type:	Panel Mount
Contact Type:	Signal
Shell Size, Connector Layout:	0.050 Pitch x 0.043 Row to Row
Number of Rows:	2
Number of Positions:	25
Connector Type:	Receptacle, Female Sockets
Connector Style:	D-Type, Micro-D
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Bulk

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## IntroductionThe MDM-25SS-A172 D-Sub Connectors is a widely used series for interconnection between electronic components. It is available with a wide variety of contact arrangements as well as panel or pcb mount types. It is a cost effective solution for many applications due to its good overall electrical performance, short-term durability and easy cable termination.## Application fieldThe MDM-25SS-A172 D-Sub Connectors is used for a variety of applications including UART, I2C, and SPI connections. It is common to find in applications such as medical, networking, telecommunications, military and aerospace, factory automation, instrumentation, consumer electronics, and a host of other markets.The D-Sub Connectors are available in several variations including size (X, XX and XXX) and pitch. The size or pitch of the connector refers to the center-to-center distance of the pins and sockets. The diameter of the pins, sockets and connector body all remain the same regardless of variations in size or pitch.## Working PrincipleThe MDM-25SS-A172 D-Sub Connectors follows the basic principle of D-Sub connector design. A metal shield is placed around the contact pins and sockets. The pins and sockets are then inserted into the shield and a locking mechanism is engaged to keep it in place.The pins of D-Sub connectors have a dimple at the end that clearly shows the polarity of the terminal. This is an essential feature in applications that require correct pin orientation. The dimple allows pins to be inserted in one orientation, ensures the pin ends are located properly, and provides contact pressure during installation of the connector.The pins and sockets are held in the connector by a two piece insulator/body. The body carries a polarization feature to ensure proper connector to housing mating order.When connections are created using the MDM-25SS-A172 D-Sub Connectors, a snap fit is created that provides a secure connection that is electrically and mechanically reliable. The combination of rearward strain relief and positive mating force allows for reliable and repeatable performance.## ConclusionThe MDM-25SS-A172 D-Sub Connectors is an economical solution for many applications due to its good overall electrical performance, short-term durability and easy cable termination. It is available in a variety of sizes, pitches and locking mechanisms and referenced by a dimple to indicate polarity. These features allow for reliable and repeatable performance that make it a suitable solution for many applications.

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