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Hirose Electric Co Ltd FX4B1-20S-1.27SV(71) — Mezzanine & Stacking Connectors
Hirose Electric Co Ltd

Hirose FX4B1-20S-1.27SV(71) Receptacle, 20 Pos, 0.050" Pitch

MPNFX4B1-20S-1.27SV(71)
Active

Hirose FX4 series receptacle, center strip contacts, 20 positions, 2 rows, 0.050" (1.27 mm) pitch, 0.197" (5.00 mm) stack height, surface mount, gold-plated contacts, tray.

$5.0500Ref. price · indicative, final on quote
FX4B1-20S-1.27SV(71) 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

FX4B1-20S-1.27SV(71) Technical Specifications
ParameterValue
SeriesFX4
MountingSurface Mount
Connector typeReceptacle, Center Strip Contacts
Height above board0.197\" (5.00mm)
Pitch0.050\" (1.27mm)
PackageTray
FeaturesBoard Guide
Contact finishGold
Rows2
Positions20
Contact finish thickness8.00µin (0.203µm)

Product details

Board-Stacking Fit for a 5.00 mm Gap

The Hirose FX4B1-20S-1.27SV(71) is a 20-position receptacle from the FX4 series of mezzanine board-to-board connectors. It mates with the corresponding FX4 header (outer shroud contacts) to complete the board-to-board interconnect.

Cross-Shop: FX4A1-20S vs FX4B1-20S

The FX4A1-20S-1.27SV(71) is a direct functional peer — same 20 positions, same 0.050" (1.27 mm) pitch, same 0.197" (5.00 mm) stack height, same gold plating thickness. The only difference is the base product number (FX4A vs FX4B). Both are active, both are receptacles with center strip contacts. If one is on allocation or has a lead-time gap, the other is a drop-in alternative for the same board footprint and mating header. Confirm the specific part marking on your BOM before swapping, but the mechanical and electrical interface is identical.

Frequently asked questions

Where can I buy FX4B1-20S-1.27SV(71)?

Submit a request for current pricing and availability — confirmed at quote time.

What is the mated stacking height for FX4B1-20S-1.27SV(71)?

The height above board for this receptacle is 0.197" (5.00 mm). When mated with the corresponding FX4 header, the total stack height between the two PCBs is determined by the sum of the receptacle height and the header height — check the header's height spec for the full z-axis budget.