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Connectors Application Choice Wizard.

Choice the type of Electric Current, and Configuration of Printed Circuit Card, Back-Panel or Cable assembly.

Best viewed at 17" display.

Gender of Connector - MALE or FEMALE are defined, in generally, by Gender of their Contacts.
Gender of Connectors Body mostly is opposite to Gender of Connector Contacts.
Both Connectors have a same quantity of position. See some Info about Applications and Connectors.

You need to define the Connection by Technical Parameters:

1. Electric Current Application ( Female Connector on Current Source Side! ):

Data Transfer Application - "Low" Frequency Rate(less than 1 MHz), low Voltage(90/45 Volt - milliVolts DC)
and low Working Current(less than 1A DC) of multiple parallel connections;

Power Supply Application - "High" AC/DC(10-50 Ampere) and "Low" DC(3-10 A) Current;

High Frequency - RF(Coax) Data Transfer Application - "High" Rate (1 MHz and Up), Serial Data - mostly 1 connection Coaxial;

2. Physical Configuration of Connection:

Device-to-Device (Cable-to-Device) or
Board-to-Board (Perpendicular = RA PCB = Right Angle = Normal = "T" or Straight = STR PCB = Parrallel = "Sandwich" = "PiggiBack") or
Cable-to-Board (Cable-to-Rack, Cable-to-Cable).

Data Transfer Application.

Backplane-to-Card Appl.: Backplane Conn.MAIL,STR PCB mate with Card Conn.FEMALE,RA PCB.
Recommended Types: Hard Metric, Interconnection System, DIN

Card-to-Card Appl.("Sandwich" or "Piggyback"): Conn.MALE,STR PCB mate with Conn.FEMALE,STR PCB.
Recommended Types: Hard Metric, Leaf Contact Connectors, Interconnection System, DIN.

Card-to-Card Appl.("T"): Conn.MALE,STR PCB mate with Conn.FEMALE,RA PCB. Female Connector on Current Source Side!

Card-to-Card Appl.(opposite "T"): Conn.FEMALE,STR PCB mate with Conn.MALE,RA PCB. Female Connector on Current Source Side!
Recommended Types: Interconnection System, Hard Metric, Leaf Contact Connectors, DIN, Card Edge

Cable-to-Card Appl.: Conn.FEMALE,STR Cable mate with Conn.MALE,RA or STR PCB.

Cable-to-Card Appl.(opposite): Conn.Shrouded MALE,STR Cable mate with Conn.FEMALE,RA or STR PCB.
Recommended Types:
D-Type, Leaf Contact Connectors(Champ®AMP), Data(RJ), Flat Cable System, Interconnection System, Hard Metric

Choice the Type:
Data-Telephone, Card Edge, DIN, D-Type, Interconnection System, Hard Metric, Flat Cable System, Leaf Contact Connectors.

Power Supply Application

Backplain-to-Card Appl.: Backplane Conn.Power MALE,STR PCB mate with Card Conn.FEMALE,STR PCB.(or opposite)
Female Connector on Current Source Side! Polarization required!
Recommended Types: Interconnection System, Hard Metric, DIN, Power.

Card-to-Card Appl.: Conn.Power MALE,STR PCB. mate with Conn.FEMALE,STR PCB.
Recommended Types: Mate-and-Lock, DIN, Interconnection System, Power, Hard Metric.

Cable-to-Card Appl.: Conn.Power FEMALE or Shrouded MALE,STR Cable mate with Conn.MALE or FEMALE,RA or STR PCB. Female Connector on Current Source Side! Polarization required!

Recommended Types: Mate-and-Lock, D-Type (Combo with Power Contacts), Power, DIN (with Power Contacts), Interconnection System,
Hard Metric(with Power Contacts).

Choice the Type: DIN, D-Type, Interconnection System, Hard Metric, Power, Mate-and-Lock.

Coax - High Frequency Data Transfer Application

Cable-to-Card Appl.: Conn.Coax STR or RA Cable mate with Conn.RA or STR PCB.

Cable-to-Cable Appl.: Conn.Coax STR or RA Cable mate with Conn.RA or STR Cable, Rack Panel mounted or Free Hang.

Choice the Type: Coax, D-Type (Combo with Coax Contacts), DIN (with Coax Contacts)

3. Quality Level of Connector depend to:
Time Life of System (Years) + Work Conditions (Indoor or Outdoor) + Cost of Failure.
Quality correspond with "Right" Type of Connector, which allowed to just specified Application,
Well Known - Approved Manufacturer, Quality(and Thickness) of Contacts Plating.
In general -
    5 microinch Gold Plating (Flash Gold) good enough for Toy,
    15 for End User Device,
    30 for Communication and
    50-100 for Military and Test Fixture.

1 micrometer = 40 microinches.

4. Quantity of Connections(Contacts): It's not a "Hard" Parameter, if you define both sides of Connection initially.

Other type depended Technical Parameters definded into Conn. Type Level. Please choice Type Above.

Foxconn ® Application Guide.
EDAC ® Online Applications Guide.

Shortenings and Definition:
Connector=Conn.; Contact=cont.; Printed Cirquit Board=PCB; Straight PCB=STR PCB; Angled PCB=Right Angle PCB=RA PCB; Backplane=Backpanel=Mainboard=Motherboard; Extender Card=Card;
Application=Appl.; Data Transfer appl.=Data appl.; Power supplay appl.=Power appl.; "High" Frequency Data Transfer appl.=Coax appl.

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