KF-N4300146 Equivalent & Substitute Parts

Part Overview

The KF-N4300146 is a rectangular connector header manufactured by Harwin Inc., classified as a vertical through-hole connector with 2 positions arranged in 2 rows. This component is designed for board-to-board or cable connections with shrouded 4-wall construction and solder termination. The part is currently listed as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and new design implementations.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	2
Number of Rows	2
Row Spacing - Mating	0.165" (4.20mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Termination	Solder
Contact Material	Brass
Insulation Material	Polyamide (PA66), Nylon 6/6
Operating Temperature	-40°C ~ 105°C
Current Rating	9A
Voltage Rating	600V
Material Flammability Rating	UL94 V-2
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the KF-N4300146 is determined by alignment of the following critical parameters:

Connector Type & Contact Configuration: Header with male pin contacts
Position Count & Row Arrangement: 2 positions total; row spacing of 0.165" (4.20mm)
Mounting & Termination: Through-hole solder termination
Shrouding Design: Shrouded 4-wall construction
Material & Environmental Compliance: Polyamide insulation, UL94 V-2 flammability rating, ROHS3 compliance, MSL 1

The substitute part 0039281023 (Molex Mini-Fit Jr 5566) meets these core substitution criteria. However, a structural difference exists: the substitute features 1 row configuration versus the main part's 2-row arrangement. This difference affects physical layout compatibility and must be evaluated within the specific application context.

Parameter Comparison

Parameter	KF-N4300146 (Harwin)	0039281023 (Molex)	Match Status
Connector Type	Header	Header	Match
Contact Type	Male Pin	Male Pin	Match
Number of Positions	2	2	Match
Number of Rows	2	1	Difference
Row Spacing - Mating	0.165" (4.20mm)	0.165" (4.20mm)	Match
Mounting Type	Through Hole	Through Hole	Match
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Match
Termination	Solder	Solder	Match
Contact Material	Brass	Brass	Match
Insulation Material	Polyamide (PA66), Nylon 6/6	Polyamide (PA66), Nylon 6/6	Match
Material Flammability Rating	UL94 V-2	UL94 V-2	Match
Contact Finish - Mating	Tin	Tin	Match
Contact Finish - Post	Tin	Tin	Match
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Match
Product Status	Obsolete	Active	Substitute is Active

Engineering Selection Recommendations

The Molex 0039281023 (Mini-Fit Jr 5566 series) is an active product with current manufacturing support and meets the primary electrical and mechanical specifications of the obsolete KF-N4300146. Both components share identical compliance certifications: ROHS3 compliance, UL94 V-2 flammability rating, and MSL 1 moisture sensitivity level.

The primary consideration for selection is the row configuration difference: the KF-N4300146 features a 2-row arrangement, while the 0039281023 features a 1-row arrangement. This structural difference requires evaluation against the specific PCB layout and mating connector design of the target application. If the application requires a 2-row header configuration, this substitute may not be directly compatible without circuit board redesign.

For applications where the 1-row configuration is acceptable or where the mating connector can accommodate the different row arrangement, the 0039281023 provides an active, compliant alternative with established supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the Molex 0039281023 directly replace the Harwin KF-N4300146 without PCB modification?

A: Direct replacement depends on the mating connector design. The 0039281023 has a 1-row configuration versus the KF-N4300146's 2-row configuration. If the mating connector is designed for a 2-row header, PCB layout modification may be required.

Q: Are the electrical ratings equivalent between these two parts?

A: The KF-N4300146 specifies 9A current rating and 600V voltage rating. The 0039281023 does not provide current and voltage ratings in the available data. Electrical performance must be confirmed against the Mini-Fit Jr 5566 series specifications from Molex technical documentation.

Q: What is the significance of the row spacing parameter?

A: Row spacing of 0.165" (4.20mm) is a critical mechanical parameter that determines physical compatibility with mating connectors. Both parts share this specification, ensuring alignment compatibility in applications designed for this spacing.

Q: Are both parts RoHS compliant?

A: Yes. Both the KF-N4300146 and 0039281023 are ROHS3 compliant and suitable for applications requiring RoHS certification.

Q: What does MSL 1 (Unlimited) mean for these connectors?

A: Moisture Sensitivity Level 1 indicates the lowest moisture sensitivity classification. These components have unlimited shelf life under normal storage conditions and do not require special moisture control during handling or storage.

Q: Why is the KF-N4300146 listed as obsolete?

A: Obsolescence indicates the part is no longer in active production by Harwin Inc. The 0039281023 is an active product with ongoing manufacturing support and supply availability.

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