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Amphenol 77311-124-20LF — Pin Headers

77311-124-20LF Amphenol ICC BERGSTIK® Header 20 Pos 2.54mm

MPN77311-124-20LF
Active

Amphenol ICC (FCI) BERGSTIK® unshrouded header, 20 positions, 0.100" (2.54mm) pitch, 3A per contact, gold or GXT™ mating finish, through-hole solder termination, UL94 V-0 black thermoplastic housing.

$1.9800Ref. price · indicative, final on quote
Amphenol 77311-124-20LF datasheet (PDF)
RoHSRoHS Compliant
SeriesBERGSTIK®
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for stock & sourcing questions
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Aug 2026

Specifications

77311-124-20LF key specifications
ParameterValue
SeriesBERGSTIK®
TypeMale Pin
MountingThrough Hole
Connector typeHeader
Fastening typePush-Pull
Current rating3A per Contact
Operating temperature-65°C~125°C
Contact materialPhosphor Bronze
Insulation colorBlack
Insulation height0.100\" (2.54mm)
Insulation materialThermoplastic
Material flammability ratingUL94 V-0

All specifications

77311-124-20LF additional specifications
ParameterValue
StyleBoard to Board
PackageBulk
ShroudingUnshrouded
TerminationSolder
Contact shapeSquare
Rows1
Pitch0.100\" (2.54mm)
Positions20
Contact finish - postTin
Contact length - post0.114\" (2.90mm)
Overall contact length0.480\" (12.19mm)
Contact finish - matingGold or Gold, GXT™
Contact length - mating0.266\" (6.75mm)
Contact finish thickness - post78.7µin (2.00µm)
Contact finish thickness - mating30.0µin (0.76µm)

Product details

Position Count vs. Sibling Headers

The 77311-124-20LF carries 20 positions. The choice comes down to the I/O count your board needs. Another 20-position sibling, the 77311-102-20LF, differs only in overall contact length (0.465" vs 0.480") — the mating pin length is shorter, which affects stack height with the receptacle. For the 77311-124-20LF, the 0.266" mating length gives a standard 0.100" board-to-board spacing when mated with a low-profile socket.

Sourced through independent distribution channels.

Frequently asked questions

Is 77311-124-20LF shrouded or unshrouded?

It is unshrouded. That means there is no plastic shroud around the pins — the mating receptacle relies on the pin alignment alone. No keying is provided, so double-check the mating half orientation during board layout.

What is the closest functional second-source for 77311-124-20LF?

For a 20-position match, the 77311-102-20LF is a near-identical alternative with a slightly shorter overall contact length (0.465" vs 0.480").