Molex 0430450421 Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Molex 0430450421 is an active-status rectangular connector header designed for through-hole, right-angle mounting applications. This shrouded 4-position connector with 3.00mm pitch serves board-to-cable/wire interconnection in automotive, industrial, medical, and telecommunications environments. Substitute parts are identified to address inventory availability, lead time constraints, or specific application requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.118" (3.00mm)
Number of Positions	4
Number of Rows	2
Row Spacing - Mating	0.118" (3.00mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Contact Material	Brass
Contact Finish - Mating	Tin
Insulation Material	Liquid Crystal Polymer (LCP), Glass Filled
Insulation Height	0.290" (7.37mm)
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the Molex 0430450421 is determined by strict alignment of the following critical parameters:

Connector type (Header)
Contact type (Male Pin)
Pitch - mating (0.118" / 3.00mm)
Number of positions (4)
Number of rows (2)
Row spacing - mating (0.118" / 3.00mm)
Mounting type (Through Hole, Right Angle)
Shrouding configuration (Shrouded - 4 Wall)
Termination method (Solder)
Contact material (Brass)
Contact finish - mating (Tin)
Insulation height (0.290" / 7.37mm)
Material flammability rating (UL94 V-0)
RoHS compliance status (ROHS3 Compliant)
Moisture sensitivity level (1 - Unlimited)

The Adam Tech DML-04-A-H-T-A-SBL meets all critical dimensional, electrical, and compliance parameters required for direct substitution in applications using the Molex 0430450421.

Parameter Comparison

Parameter	Molex 0430450421	Adam Tech DML-04-A-H-T-A-SBL	Compatibility
Manufacturer	Molex	Adam Tech	Different manufacturer
Series	Micro-Fit 3.0 43045	DML	Different series
Connector Type	Header	Header	Match
Contact Type	Male Pin	Male Pin	Match
Pitch - Mating	0.118" (3.00mm)	0.118" (3.00mm)	Match
Number of Positions	4	4	Match
Number of Rows	2	2	Match
Row Spacing - Mating	0.118" (3.00mm)	0.118" (3.00mm)	Match
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Match
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Match
Termination	Solder	Solder	Match
Contact Length - Post	0.125" (3.18mm)	0.126" (3.20mm)	Within tolerance
Insulation Height	0.290" (7.37mm)	0.290" (7.37mm)	Match
Contact Shape	Square	Square	Match
Contact Finish - Mating	Tin	Tin	Match
Contact Material	Brass	Brass	Match
Insulation Material	Liquid Crystal Polymer (LCP), Glass Filled	Thermoplastic	Different material
Material Flammability Rating	UL94 V-0	UL94 V-0	Match
Insulation Color	Black	Black	Match
Current Rating (Amps)	8A	Varies by Wire Gauge	Molex specifies fixed rating
Voltage Rating	600V	250V	Molex rated higher
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Match
Product Status	Active	Active	Match

Engineering Selection Recommendations

Both the Molex 0430450421 and Adam Tech DML-04-A-H-T-A-SBL are active-status products with ROHS3 compliance and UL94 V-0 flammability certification. Selection between these parts is based on the following criteria:

Molex 0430450421 is the primary specification. It provides a fixed 8A current rating and 600V voltage rating with LCP glass-filled insulation material.

Adam Tech DML-04-A-H-T-A-SBL is a qualified substitute when inventory or lead time constraints require an alternative source. The Adam Tech part maintains all critical dimensional and mechanical parameters. Differences include thermoplastic insulation material, variable current rating dependent on wire gauge, and 250V voltage rating. Applications requiring the full 600V rating or fixed 8A specification should use the Molex part.

Both parts carry identical moisture sensitivity level (MSL 1 - Unlimited) and REACH unaffected status, supporting use in automotive, industrial, medical, and telecommunications applications.

Frequently Asked Questions (FAQ)

Q: Can the Adam Tech DML-04-A-H-T-A-SBL be used as a direct replacement for the Molex 0430450421?

A: The Adam Tech part is mechanically and dimensionally compatible for board-to-cable/wire interconnection in applications operating at 250V or below. Applications requiring the full 600V rating or fixed 8A current specification must use the Molex part.

Q: What is the difference in insulation material between these parts?

A: The Molex 0430450421 uses Liquid Crystal Polymer (LCP) glass-filled insulation, while the Adam Tech DML-04-A-H-T-A-SBL uses thermoplastic insulation. Both materials meet UL94 V-0 flammability requirements. Material selection depends on application-specific thermal and chemical resistance requirements.

Q: Are both parts RoHS compliant?

A: Yes. Both the Molex 0430450421 and Adam Tech DML-04-A-H-T-A-SBL are ROHS3 compliant and REACH unaffected.

Q: What is the pitch specification for these connectors?

A: Both connectors feature a 0.118" (3.00mm) mating pitch with 0.118" (3.00mm) row spacing, supporting 4-position, 2-row through-hole right-angle header applications.

Q: How do the current ratings differ?

A: The Molex 0430450421 specifies a fixed 8A current rating. The Adam Tech DML-04-A-H-T-A-SBL current rating varies by wire gauge. Application requirements should determine which specification is appropriate.

Q: What is the moisture sensitivity level for these parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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