Molex Micro-Fit 3.0 Series Straight Through Hole PCB Header, 4 Contact(s), 3 mm Pitch, 2 Row(s), Shrouded

RS Stock No.:: 233-2876
Mfr. Part No.:: 43045-0412
Brand:: Molex

Molex Micro-Fit 3.0 Series Straight Through Hole PCB Header, 4 Contact(s), 3 mm Pitch, 2 Row(s), Shrouded

Bulk discount available

Subtotal (1 pack of 5 units)*

£6.22

(exc. VAT)

£7.465

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

740 unit(s) ready to ship
Plus 460 unit(s) ready to ship from another location
Plus 5,045 unit(s) shipping from 09 December 2025

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit	Per Pack*
5 - 95	£1.244	£6.22
100 - 370	£0.85	£4.25
375 - 1495	£0.818	£4.09
1500 - 2995	£0.766	£3.83
3000 +	£0.738	£3.69

*price indicative

RS Stock No.:: 233-2876
Mfr. Part No.:: 43045-0412
Brand:: Molex

Specifications

Technical Reference

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Molex
	Product Type	PCB Header
	Series	Micro-Fit 3.0
	Current	8.5A
	Pitch	3mm
	Number of Contacts	4
	Housing Material	Thermoplastic
	Number of Rows	2
	Orientation	Straight
	Shrouded/Unshrouded	Shrouded
	Connector System	Wire-to-Board
	Mount Type	Through Hole
	Contact Material	Brass
	Contact Plating	Tin
	Termination Type	Solder
	Minimum Operating Temperature	-40°C
	Row Pitch	3mm
	Maximum Operating Temperature	105°C
	Contact Gender	Male
	Standards/Approvals	No
	Mating Pin Length	3mm
	Voltage	250 V
	Distrelec Product Id	304-40-667

	Select all
	Brand Molex
	Product Type PCB Header
	Series Micro-Fit 3.0
	Current 8.5A
	Pitch 3mm
	Number of Contacts 4
	Housing Material Thermoplastic
	Number of Rows 2
	Orientation Straight
	Shrouded/Unshrouded Shrouded
	Connector System Wire-to-Board
	Mount Type Through Hole
	Contact Material Brass
	Contact Plating Tin
	Termination Type Solder
	Minimum Operating Temperature -40°C
	Row Pitch 3mm
	Maximum Operating Temperature 105°C
	Contact Gender Male
	Standards/Approvals No
	Mating Pin Length 3mm
	Voltage 250 V
	Distrelec Product Id 304-40-667

COO (Country of Origin):: CN

Molex Micro-Fit 3.0 Straight PCB Header, 4 Way, 2 Rows - 43045 Series - 43045-0412

Use this robust and reliable wire-to-board Molex PCB (printed circuit board) header to establish multiple power connections to your board. The compact and space-saving design carries up to 5A of current per pin for an ideal low to mid-range power distribution solution. A locking ramp provides secure latching to ensure connectors and connections don't come loose and disrupt power transmission. The tin-plated brass contacts provide reliable conductivity as well as resistance to corrosion, so you can be certain of the unit's long-lasting performance.

• Fully isolated dual-beam terminals ensure secure contact and reliable electrical performance

• Polarised pins prevent misalignment and mismatched connections to minimise the risk of short circuits and component damage

• Kinked solder legs for improved PCB retention

• High-temperature thermoplastic housing for IR (infrared) reflow soldering

Applications

• Gaming consoles

• Solar power installations

• Medical equipment

• Data and telecommunications networks

What's the difference between a header and a connector?

A connector houses various terminals that plug into the header on your PCB. You typically solder your header onto your board, whereas you can connect and unplug your connector as needed.

Molex Micro-Fit 3.0 3.0mm Dual Row PCB Headers with PCB Polarizing Peg, 43045 Series

Micro-Fit 3.0 3mm pitch wire to board dual row PCB headers which form part of a compact power connector system providing a low to mid-range power distribution solution. With the ability to carry up to 5A of current, Micro-Fit 3.0 connectors have one of the highest current carrying abilities in the smallest footprints available. These Micro-Fit 3.0 PCB headers incorporate positive latching in the form of a locking ramp on the housing for secure mating and to prevent accidental disconnection. The housings are made of high-temperature UL 94V-0 Liquid Crystal Polymer that can withstand temperatures of up to 265°C during the IR reflow soldering process. The through hole mounting versions of these Micro-Fit 3.0 headers are also SMT compatible which means a reduction in process requirements and costs. To help position and align these Micro-Fit 3.0 headers to the PCB board, PCB polarising pegs are incorporated into the connector design. part numbers ending in xx12, xx13 and xx14 also feature kinked solder legs for additional PCB retention. The contacts of these Micro-Fit 3.0 headers are fully isolated within the housings to reduce arcing. Tin or a choice of two thicknesses of gold contact platings are available to keep down costs.

Features and Benefits

• High current carrying capacity in a small footprint

• High temperature housings for IR reflow soldering

• Through hole versions SMT compatible

• Positive latching for secure mating connection

• Fully isolated dual beam terminals for reliable electrical performance and contact

• PCB polarising pegs for alignment and positioning on PCB;• Kinked solder legs for additional PCB retention;• Glow Wire Compliant

Product Application Information

These Micro-Fit 3.0 header connectors are suitable for use in a wide range of low to mid power applications including the following:

Military COTS (Commercial Off The Shelf)

Solar power

Consumer products (dryers, freezers, fridges, washing machines)

Data communications (routers, servers)

Medical

Telecommunications

Gaming terminals