MX3.0mm Dual-Row Connectors, Cables & PCB Headers
MX3.0mm Dual-Row Connectors, Cables & PCB Headers
MX3.0mm describes the 3.0mm-pitch, predominantly dual-row connector format represented in this collection. The 23 products include mating plug and receptacle housings, male and female crimp contacts, straight and right-angle through-hole PCB headers, pre-crimped leads, cable assemblies and component kits.
Many listings use Micro-Fit, 43020, 43025, 43640, 43645, 5557 or 5559 as marketplace search terms. These references do not by themselves establish that every Yoeruyo item is an original Molex part or a drop-in replacement. Verify the exact drawing, keying and contact system before mixing manufacturers.
Product Range
- Dual-row wire-side housings and mating cable housings
- Male and female open-barrel crimp terminals
- Straight and right-angle through-hole PCB headers
- Single-ended, male-to-female, male-to-male and female-to-female pre-crimped leads
- Selected 20AWG and 22AWG cable options in multiple lengths and colors
- Connector kits combining housings, terminals and selected board headers
- Position counts extending from compact 2-circuit formats to larger dual-row configurations, depending on the listing
MX3.0mm and Micro-Fit Compatibility
Pitch is only one compatibility dimension. Confirm row count, circuit count, housing key, latch geometry, terminal gender, contact cavity, polarization and mating depth. For PCB parts, also verify footprint, pin size, board-lock features and header orientation. Do not infer electrical equivalence from physical fit.
Wire-to-Wire vs. Wire-to-Board
Wire-to-wire assemblies use mating cable housings and contacts on both sides. Wire-to-board assemblies pair a cable housing with a PCB header. Straight headers support a perpendicular cable approach; right-angle headers route the connection parallel to the board. Check enclosure clearance and cable bend radius before selecting an orientation.
How to Select Components
- Confirm 3.0mm pitch and whether the layout is single or dual row.
- Match the total circuit count and row arrangement, such as 2×1 through selected 2×12 options.
- Compare latch, polarization, keying and housing color where color identifies a keyed variant.
- Select mating housings, the correct male or female terminals, or a matching PCB header.
- Match each terminal to the specified conductor and insulation diameter.
- For pre-wired products, verify gauge, length, color, end gender and conductor order.
- Check package contents carefully; listings may offer individual components, terminal lots or complete sets.
Crimping, Pinout and Assembly
Use a crimp tool suitable for the selected open-barrel terminal. Confirm conductor and insulation crimps, terminal retention and housing orientation. For finished cables, verify continuity and pin order from the mating face. Male and female labels may refer to either contacts or housings, so use product images and dimensions rather than terminology alone.
Electrical and Compliance Boundaries
No single current, voltage, temperature, material, plating, flammability or certification value applies to every product in this collection. Ratings such as 8.5A or 600V depend on the exact contact, wire, circuit loading, temperature rise and recognized component system. UL recognition, RoHS status, gold plating and terminal-position assurance must be confirmed for the exact item and documentation.
MX3.0mm vs. 4.2mm Power Connectors
MX3.0mm products use a smaller nominal pitch than common 4.2mm dual-row power connectors. They are different mechanical systems and are not interchangeable. Select based on complete mating geometry and validated electrical requirements, not size alone.
Typical Applications
When properly selected and validated, these connectors can support internal power and signal harnesses in computers, power supplies, control equipment, robotics, appliances and prototypes. Automotive, server, battery and safety-critical applications require engineering validation of current, temperature rise, vibration, retention and compliance.
Frequently Asked Questions
Are all MX3.0mm products genuine Molex Micro-Fit parts?
No such collection-wide claim is made. Yoeruyo is the listed brand; referenced series numbers help identify the format and must be checked against exact specifications.
Can parts from different suppliers be mixed?
Only after drawings, keying, terminals and mating performance have been verified.
Does every housing include contacts?
No. Some options are housing-only or terminal-only, while selected products are kits.
Are all products rated 8.5A and 600V?
No. Use product-level ratings under the actual wire, loading and temperature conditions.
What should be checked for a cable assembly?
Confirm end gender, wire gauge, length, color, circuit count and pin order.
Ordering Checklist
Confirm pitch, rows, circuits, keying, latch, contact gender, wire range, cable configuration, PCB footprint, orientation, ratings, documentation, package contents and quantity. Validate a sample before production use.
