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Molex 501591-2011 — Mezzanine & Stacking Connectors

Molex 501591-2011 SlimStack Receptacle, 20 Pos, 0.40mm Pitch

MPN501591-2011
Active

Molex SlimStack 501591 series, 501591-2011 receptacle, center strip contacts, 20 positions, 2 rows, 0.016" (0.40mm) pitch, surface mount, gold contact finish 4.00µin, 0.035" (0.88mm) height above board, mated stacking height 0.9mm, solder retention feature.

$1.8500Ref. price · indicative, final on quote
Molex 501591-2011 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

501591-2011 specifications
ParameterValue
SeriesSlimStack 501591
MountingSurface Mount
Connector typeReceptacle, Center Strip Contacts
Height above board0.035\" (0.88mm)
Mated stacking heights0.9mm
Pitch0.016\" (0.40mm)
PackageBox
FeaturesSolder Retention
Contact finishGold
Rows2
Positions20
Contact finish thickness4.00µin (0.100µm)

Product details

SlimStack 501591-2011 — Fine-Pitch Mezzanine Receptacle

The Molex 501591-2011 is a 20-position receptacle from the SlimStack 501591 series, designed for board-to-board mezzanine stacking. It uses a center strip contact arrangement in two rows on a 0.016" (0.40mm) pitch — a very fine pitch that keeps the footprint compact but demands careful PCB layout and soldering control. The mated stacking height is 0.9mm, with the connector standing 0.035" (0.88mm) above the board, which sets the z-height budget for the stack.

Frequently asked questions

What is the pitch of 501591-2011?

The pitch is 0.016" (0.40mm), which is a very fine pitch requiring careful PCB layout and soldering control.