Molex Mini-Fit Jr Series Vertical Through Hole PCB Header, 20 Contact(s), 4.2 mm Pitch, 2 Row(s), Shrouded

RS Stock No.:: 172-8923
Mfr. Part No.:: 39-28-1203
Brand:: Molex

Molex Mini-Fit Jr Series Vertical Through Hole PCB Header, 20 Contact(s), 4.2 mm Pitch, 2 Row(s), Shrouded

Bulk discount available

Subtotal (1 pack of 5 units)*

£14.08

(exc. VAT)

£16.895

(inc. VAT)

FREE delivery for orders over £50.00

In Stock

360 unit(s) ready to ship
Plus 20 unit(s) ready to ship from another location
Plus 995 unit(s) shipping from 08 December 2025

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

Units	Per unit	Per Pack*
5 - 95	£2.816	£14.08
100 - 370	£1.96	£9.80
375 - 1495	£1.884	£9.42
1500 +	£1.808	£9.04

*price indicative

RS Stock No.:: 172-8923
Mfr. Part No.:: 39-28-1203
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	Mini-Fit Jr
	Current	9A
	Pitch	4.2mm
	Number of Contacts	20
	Housing Material	Nylon
	Number of Rows	2
	Orientation	Vertical
	Shrouded/Unshrouded	Shrouded
	Connector System	Wire-to-Board
	Mount Type	Through Hole
	Contact Plating	Tin
	Contact Material	Brass
	Minimum Operating Temperature	-40°C
	Termination Type	Solder
	Row Pitch	4.2mm
	Maximum Operating Temperature	105°C
	Tail Pin Length	3.5mm
	Contact Gender	Male
	Standards/Approvals	No
	Voltage	600 V
	Distrelec Product Id	304-30-635

	Select all
	Brand Molex
	Product Type PCB Header
	Series Mini-Fit Jr
	Current 9A
	Pitch 4.2mm
	Number of Contacts 20
	Housing Material Nylon
	Number of Rows 2
	Orientation Vertical
	Shrouded/Unshrouded Shrouded
	Connector System Wire-to-Board
	Mount Type Through Hole
	Contact Plating Tin
	Contact Material Brass
	Minimum Operating Temperature -40°C
	Termination Type Solder
	Row Pitch 4.2mm
	Maximum Operating Temperature 105°C
	Tail Pin Length 3.5mm
	Contact Gender Male
	Standards/Approvals No
	Voltage 600 V
	Distrelec Product Id 304-30-635

Molex Mini-Fit Jr Series PCB Header, 9A Current Rating, 4.2mm Pitch - 39-28-1203

This PCB header is suitable for power and wire-to-board applications, providing dependable connections in various environments. The Mini-Fit Jr. connectors feature a shrouded design that ensures secure electrical connections and simplifies assembly. Its robust construction makes it suitable for applications in the automation and electronics sectors.

Features & Benefits

• Vertical orientation optimises space and accessibility on PCBs

• Made from Durable brass for improved longevity

• 4.2mm pitch compatible with standard wiring setups

Applications

• Designed for use with standard Mini-Fit female terminals for secure mating

• Suitable for integration in automation equipment and consumer electronics

• Utilised in mechanical and electrical assembly for component interlinking

What is the maximum operating temperature of the product?

The device operates within a temperature range of -40°C to +105°C, accommodating various conditions.

Can this product be used with different PCB thicknesses?

It is recommended for use with a PCB thickness of 1.60mm to ensure optimal retention and functionality.

How many mating cycles can be expected from this header?

The connector can endure up to 30 mating cycles, ensuring longevity in repeated use scenarios.

Is there a specific process for soldering this header?

The product supports wave soldering processes with a maximum temperature of 260°C for efficient assembly.

Can this header handle increased amperage beyond its rated capacity?

For higher amperage requirements, it is advisable to consider the Mini-Fit Plus HCS family for enhanced performance.