Molex 43645-0200 Micro-Fit 3.0 2-Pin Receptacle Housing

Molex 43645-0200 / 0436450200 is a genuine Micro-Fit 3.0 two-position, single-row receptacle housing for compact, latching wire-to-wire and wire-to-board harnesses. It uses the 3.00 mm Micro-Fit pitch in black low-halogen nylon, making it a better fit than loose Dupont-style housings where a printer harness needs a positive latch.

Why use Micro-Fit 3.0 here?

• Positive latch and polarization: the housing locks to the mating Micro-Fit part and is polarized to reduce mis-mating.
• Compact power/signal format: 3.00 mm pitch keeps harnesses smaller than larger Mini-Fit-style connectors while staying more robust than hobby jumper housings.
• Known Molex ecosystem: this is part of the Micro-Fit 3.0 43645 receptacle-housing family, so it belongs with the matching Molex terminals and mating housings instead of mystery clone parts.

Specifications

• Manufacturer: Molex
• Manufacturer part numbers: 43645-0200 / 0436450200
• Series: Micro-Fit 3.0, 43645 receptacle housing
• Positions: 2 circuits, single row
• Pitch: 3.00 mm / 0.118 in
• Housing material: black nylon, low-halogen, UL 94V-0
• Mounting style: cable-mount / free-hanging wire housing
• Terminals: accepts Molex Micro-Fit female crimp terminals, including 43030 and 46235 series terminals
• Mating family: Molex Micro-Fit 3.0 single-row plug housings, including the 43640 family
• Operating temperature: -40°C to +105°C
• Net weight: approximately 0.272 g

Printer and harness fitment

Use this when your BOM calls for a 2-position Molex Micro-Fit 3.0 receptacle housing for a compact 3D-printer wiring harness, toolhead lead, fan/power lead, or electronics-bay connector. It is the plastic housing only; crimp terminals and the mating side are selected separately to match your wire gauge and board or plug.

Nearby live Micro-Fit options in the catalog include the dual-row 2-pin Micro-Fit housing, the dual-row 4-circuit Micro-Fit plug housing, and the Micro-Fit dual-row 4-circuit kit.

What you get

• One genuine Molex 43645-0200 / 0436450200 Micro-Fit 3.0 receptacle housing.
• Loose housing only — no contacts, pre-crimped leads, mating plug/header, or crimp tool included.

Gotchas

• Housing only: you still need the correct Micro-Fit crimp terminals for your wire gauge.
• Single-row 2-circuit: do not substitute this for the dual-row 2-pin housing unless your BOM explicitly allows that change.
• Not interchangeable with Mini-Fit Jr., JST-XH, or Dupont: match the Micro-Fit 3.0 family on both sides before crimping a harness.