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77311-824-21LF — Amphenol product photo
Amphenol

77311-824-21LF BergStik Header 21 Pos 0.100" Pitch

MPN77311-824-21LF
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Amphenol ICC (FCI) BergStik® series, Board to Board Header, 77311-824-21LF, 21 circuits, 1 row, 0.100" (2.54mm) pitch, Through Hole, Solder termination, Gold or GXT™ mating finish.

$1.1356Ref. price · indicative, final on quote
77311-824-21LF datasheet
StockContact for availability
Lead timeIn Stock wk
MOQ1 pcs
  • New & original stockTraceable channels only — no mixed lots, no re-taped reels.
  • Factory packaging where availableSealed reels, trays and bags; cut quantities always stated on the quote.
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Specifications

77311-824-21LF Technical Specifications
ParameterValue
SeriesBERGSTIK®
GenderMale Pin
Mounting typeThrough 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
StyleBoard to Board
PackageBag
ShroudingUnshrouded
TerminationSolder
Contact shapeSquare
Rows1
Pitch0.100\" (2.54mm)
Positions21
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 - mating15.0µin (0.38µm)

Product details

21-Pin Single-Row BergStik — What It Fits

The 77311-824-21LF: The 21-position count is an odd number for a single row — most BergStik headers come in even counts or multiples of two. That means the BOM position count is exact: no depopulating or skipping pins. If your design calls for 21 circuits, this is the header.

3 A Per Contact — What That Means on a 21-Pin Header

With all 21 pins carrying current, the total theoretical capacity is 63 A — but the practical limit is set by the PCB trace width, the number of adjacent pins carrying current simultaneously, and the ambient temperature inside the enclosure.

Through-Hole Solder — Board-Mount Details

The base product number is 77311 — variations in the dash suffix change the post length, plating, or packaging. The -21LF suffix indicates 21 positions with lead-free (RoHS) compliance.

Frequently asked questions

What mates with this 21-pin single-row header?

The unshrouded design means the mating connector's housing must provide its own polarization or keying — there is no shroud on the header to prevent misalignment.