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Hirose Electric Co Ltd DF40TC(4.0)-20DS-0.4V(51) — Board-to-Board Connectors

Hirose DF40TC(4.0)-20DS-0.4V(51) Receptacle, 0.40mm Pitch

MPNDF40TC(4.0)-20DS-0.4V(51)
Active

Hirose DF40T series receptacle, center strip contacts, 0.016" (0.40mm) pitch, 20 positions, 2 rows, 4mm mated stack height, surface mount, gold-plated contacts, Tape & Reel.

$0.5605Ref. price · indicative, final on quote
Hirose Electric Co Ltd DF40TC(4.0)-20DS-0.4V(51) datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

DF40TC(4.0)-20DS-0.4V(51) specifications
ParameterValue
SeriesDF40T
MountingSurface Mount
Connector typeReceptacle, Center Strip Contacts
Height above board0.154\" (3.90mm)
Mated stacking heights4mm
Pitch0.016\" (0.40mm)
PackageTape & Reel (TR)
FeaturesPick and Place, Solder Retention
Contact finishGold
Rows2
Positions20
Contact finish thickness1.97µin (0.050µm)

Product details

Board-to-Board Mezzanine Receptacle, 0.40mm Pitch, 20 Positions

The Hirose DF40TC(4.0)-20DS-0.4V(51) is a 20-position receptacle from the DF40T series, designed for board-to-board mezzanine stacking. It uses a 0.016" (0.40mm) pitch dual-row layout with center strip contacts, and mates with the corresponding DF40T series headers to achieve a 4mm mated stack height. The 0.40mm pitch drives the PCB footprint — the tight spacing demands precise solder paste deposition and a controlled impedance layout for high-speed signals. The 4mm stack height is fixed by the mating pair; verify the header part number from the DF40T series to confirm the z-height matches your board spacing budget.

SMT Assembly and Retention Features

Surface-mount termination with Pick and Place and Solder Retention features built into the package. Supplied in Tape & Reel packaging for high-volume pick-and-place lines.

Frequently asked questions

What is the pitch of DF40TC(4.0)-20DS-0.4V(51)?

The pitch is 0.016" (0.40mm), dual-row, which sets the board footprint density and the matching header's contact spacing.

What is the stack height of DF40TC(4.0)-20DS-0.4V(51)?

This is the fixed z-height for the board-to-board mezzanine pair.

Is DF40TC(4.0)-20DS-0.4V(51) compatible with DF40C series headers?

The DF40TC(4.0)-20DS-0.4V(51) is part of the DF40T series, not the DF40C series. Mating compatibility requires a DF40T series header to achieve the specified 4mm stack height and contact alignment. The DF40C series uses a different mechanical envelope and is not a direct mate.

Where to buy DF40TC(4.0)-20DS-0.4V(51) available via RFQ confirmation?

This part is sourced to order against your BOM quantity.