
Molex
Micro-Fit 3.0 Plug Housing Dual Row 4 Circuits 430200401
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Molex 43020-0401 Micro-Fit 3.0 plug housing — a black, dual-row 4-circuit crimp housing for compact wire-to-wire power connections in printer electronics and toolhead wiring.
Why use Micro-Fit 3.0 here?
- 3.00mm pitch gives more current density than JST-XH/DuPont-style signal connectors without taking much panel space.
- Locking, polarized housing helps prevent loose or mis-mated wiring on moving printer assemblies.
- Dual-row 2x2 format keeps four power/signal circuits compact for harnesses, toolhead wiring, and printer service loops.
Specifications
- Manufacturer: Molex
- Manufacturer part number: 43020-0401 / 430200401
- Series: Micro-Fit 3.0, 43020
- Type: plug crimp housing, free-hanging / wire-to-wire
- Circuits: 4, dual row / 2x2
- Pitch: 3.00mm mating and termination interface
- Housing material: black nylon, UL 94V-0, low-halogen
- Operating temperature: -40°C to +105°C
- Current rating: up to 5A per contact when built with the correct Micro-Fit terminals and wire
Fitment and mating parts
- Mates with Molex 43025-series Micro-Fit 3.0 receptacle housings.
- Uses Molex 43031-series Micro-Fit 3.0 male crimp terminals.
- For a ready-to-build four-circuit set, see the Molex Micro-Fit Dual Row 4 Circuit Kit.
What this is not
- This is the plastic housing only; crimp contacts, wire, and the mating receptacle housing are not included.
- It is not a JST-XH, Mini-Fit Jr., or Micro-Fit+ part. Confirm the mating side and crimp terminals before building a harness.
Shipping & Returns
Returns:
Thank you for purchasing from dfh.fm. I want you to be completely satisfied with your purchase. If for any reason you are not satisfied, you may return your purchase within 60 days of the original purchase date.
Defective items: Please inspect items upon receipt. If you receive a defective item, you may return it for a full refund or replacement within 90 days of the original purchase date. Please contact me to initiate a return for a defective item.
Non-defective items: If you are not satisfied with a non-defective item, you may return it for a refund within 30 days of the original purchase date. A 20% restocking fee will be deducted from the refund amount, to offset the time and inconvenience, as I am the sole employee processing the return and restocking the item. The fee also covers the costs associated with processing the return. Refunds for non-defective items will be issued through the original payment method.
Preordered items: Due to the nature of preorders, delivery dates are subject to change. Please keep in mind that, If you have preordered an item, it is not eligible for a refund until after it has arrived at the store. Once the item arrives at the store and is inspected, you may request a refund within 30 days of the original purchase date. Please note that refunds for preordered items may take up to 10 days to be issued.
To initiate a return, please open a ticket on the shop’s discord channel, with your order number and the reason for the return. We will provide you with further instructions on how to return your purchase.
Thank you for shopping with us. If you have any questions or concerns, please don't hesitate to contact me, via Discord.
Order alterations and cancellations:
Once an order has ben submitted, no alterations can be made. This includes adding or removing items or canceling orders. You are welcome to return an order, once you have taken receipt, following the returns procedure listed above.
Shipping:
US Shipping is via UPS or USPS. The way it is set up shows the least expensive options for standard, priority and express shipping. I can not take special requests for specific carriers at this time.
International shipping is mostly UPS, as I utilize Zonos/UPS integration to tally extremely accurate import and shipping costs.
I require a telephone and email with international orders and you must make yourself available to the carrier or your customs, should they require more information. If you are unreachable and the package is discarded or rerturned, I will not be responsible for rerturning your shipping cost.
If there is a problem with an international order, it is my choice to refund part or all of the order, or send a replacement.
Addresses are verified through Shopify, but the customer is still responsible for inputting their address in the correct format. Any returns or lost shipments, due to incorrectly addressed packages, are the responsibility of the customer.

