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Molex 5054331881 — Pin Headers

Molex 5054331881 Micro-Lock PLUS Header, 18 Pos, 1.25mm, SMT

MPN5054331881
Active

Molex Micro-Lock PLUS 505433 series, 5054331881, Board to Cable/Wire header, 18 positions, 2 rows, 1.25mm pitch, SMT, shrouded with latch holder, tin contacts, -40°C to 105°C, UL94 V-0.

$1.6200Ref. price · indicative, final on quote
Molex 5054331881 datasheet (PDF)
RoHSROHS3 Compliant
SeriesMicro-Lock PLUS 505433
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

5054331881 key specifications
ParameterValue
SeriesMicro-Lock PLUS 505433
TypeMale Pin
MountingSurface Mount
Connector typeHeader
Fastening typeLatch Holder
Voltage rating50VAC/DC
Current ratingVaries by Wire Gauge
Operating temperature-40°C ~ 105°C
Contact materialBrass
Insulation colorBlack
Insulation height0.285\" (7.25mm)
Insulation materialPolyamide (PA), Nylon

All specifications

5054331881 additional specifications
ParameterValue
Mated stacking heights8.6mm
Material flammability ratingUL94 V-0
StyleBoard to Cable/Wire
PackageTape & Reel (TR) Cut Tape (CT)
FeaturesPick and Place, Solder Retention
ShroudingShrouded - 4 Wall
TerminationSolder
ApplicationsAutomotive, General Purpose, Industrial
Contact shapeSquare
Rows2
Pitch0.049\" (1.25mm)
Positions18
Contact finish - postTin
Contact finish - matingTin
Contact finish thickness - post39.4µin (1.00µm)
Contact finish thickness - mating39.4µin (1.00µm)

Product details

1.25mm pitch, 18-position SMT header with latch holder

The 5054331881: This is a Molex Micro-Lock PLUS 505433 series header, style Board to Cable/Wire, with 18 positions in 2 rows at 1.25mm pitch — a common spacing for compact wire-to-board interconnects in automotive and industrial control modules.

Surface-mount footprint with solder retention

The SMT termination includes solder retention features and a pick-and-place pad, making it suitable for automated assembly lines where the header must stay put during reflow before the mating connector is attached. Mated stack height is 8.6mm — a fixed dimension that sets the clearance between the board and the mating cable housing, so verify your enclosure height before committing.

No stock-holding claim — we source and quote against your BOM quantity per RFQ.

Mates with Micro-Lock PLUS receptacle

This header mates with the Micro-Lock PLUS receptacle housing (Molex series 505432) and uses the matching crimp terminals. The latch holder engages with the receptacle's locking ramp for a secure connection.

Frequently asked questions

Where can I buy Molex 5054331881?

We source 5054331881 per RFQ against your BOM quantity. No stock-holding claim — current pricing and lead time are confirmed at quote time. Contact us with your target volume and delivery window.

What is the difference between 5054331881 and 5054331681?

The primary difference is position count: 5054331881 has 18 positions, while 5054331681 has 16 positions. Both are 2-row, 1.25mm pitch, SMT headers from the same Micro-Lock PLUS series with identical contact finish and temperature rating.

What connector mates with Molex 5054331881?

It mates with the Micro-Lock PLUS receptacle housing (Molex series 505432) and uses the matching crimp terminals. The latch holder on the header engages with the receptacle's locking ramp.

Is 5054331881 RoHS compliant?

Yes, it is ROHS3 Compliant per the manufacturer's specification.