FASTON terminal

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The image shows three Faston style female terminals with a match stick as size comparison. The terminals have three different coloured insulations.
Faston Female Terminals in Three Sizes with Insulation
The image shows three Faston style male terminals in three different sizes. They all have insulation in different colours.
Faston Male Terminals in Three Sizes with Insulation.

FASTON terminals are connectors, widely used in electronic and electrical equipment. These terminals are manufactured by many different vendors, commonly using the term "quick disconnect", "tab" terminals, or blade connectors. They are similar in size to some of the Packard terminals, such as Packard 56, and may have[citation needed] been derived from them.

The terminals are often called "quick disconnect", because the predecessors were screw terminals. It took more time to unscrew this terminals to disconnect a wire. The name "tab" terminals is derived from the characteristic shape of the female version.

Six different series are available, named after their width in inches.[1] Insulated versions of the terminals are color-coded to indicate what wire gauges they may be used with. The terminal system consists of tabs (male) and receptacles (female). There are also versions of both tabs and receptacles and ones that can be mounted directly to circuit boards.

A little-known hand tool exists for inserting the terminals, the AMP Universal Handle.

Faston is a trademark. Faston connectors come in male and female types. They have been commonly used since the 1970s.


  • PIDG FASTON (Nylon) terminals are defined in AMP Specification 114-1002: Terminal, FASTON, PIDG, Application of
  • PLASTI-GRIP (Vinyl) (insulation restricting) terminals are defined in AMP Specification 114-1003: Terminal, FASTON, PLASTI-GRIP, Application of
  • UL 310 "Standard for Electrical Quick--Connect Terminals"[2]
  • CSA 22.2 #153, “Quick--Connect Terminals”
  • UL 486 also specifies the testing of standard wire connectors and soldering lugs.
  • MIL-T-7928

Crimp styles[edit]

Two main styles of crimps are specified by AMP:

  • "F" Crimp for use on non-insulated connectors
  • TETRA-CRIMP for use on insulated PIDG and PLASTI-GRIP connectors
  • "C" Crimp - typically used for flag connectors (where the wire enters the connector perpendicular to the direction of tab insertion)
  • Tab-Lok - typically used for flag connectors

Wire gauge insulation colors[edit]

The colors don't provide information about the polarity of the crimped cables but specify their diameter.

Insulation color code AWG size range Comments
Yellow 26–22
Transparent 24–20
Red 22–16
Blue 16–14
Yellow/Black 16–14 Heavy Duty
Yellow 12–10
Red 8
Blue 6
Yellow 4
Brown 2
Blue 1/0
Yellow 2/0
Red 3/0
Blue 4/0

312 series[edit]

0.312-inch (7.92 mm) male tab width

250 series[edit]

0.250-inch (6.35 mm) male tab width

  • 10 AWG, 24 amps (continuous)
  • 12 AWG, 20 amps (continuous)
  • 14 AWG, 15 amps (continuous)
  • 16 AWG, 10 amps (continuous)
  • 18 AWG, 7 amps (continuous)
  • 20 AWG, 4 amps (continuous)
  • 22 AWG, 3 amps (continuous)

205 series[edit]

0.205-inch (5.21 mm) male tab width

  • 14 AWG, 15 amps (continuous)
  • 16 AWG, 10 amps (continuous)
  • 18 AWG, 7 amps (continuous)
  • 20 AWG, 4 amps (continuous)
  • 22 AWG, 3 amps (continuous)

187 series[edit]

0.187-inch (4.75 mm) male tab width

  • 16 AWG, 10 amps (continuous)
  • 18 AWG, 7 amps (continuous)
  • 20 AWG, 4 amps (continuous)
  • 22 AWG, 3 amps (continuous)

125 series[edit]

0.125-inch (3.18 mm) male tab width

110 series[edit]

0.110-inch (2.79 mm) male tab width

  • 16 AWG, 5 amps (continuous)
  • 18 AWG, 4 amps (continuous)
  • 20 AWG, 3 amps (continuous)
  • 22 AWG, 2 amps (continuous)

See also[edit]


  1. ^ "FASTON Terminals Insulated and Uninsulated" (PDF). Retrieved 11 July 2015.
  2. ^ "UL 310 Electrical Quick-Connect Terminals". Retrieved 11 July 2015.

External links[edit]