Molex 0351550402 Rectangular Connector Housing - Equivalent & Substitute Parts

Part Overview

The Molex 0351550402 is a 4-position receptacle housing connector with 2.50mm pitch, designed for free-hanging in-line applications using crimp termination. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The connector features a red insulation housing and latch lock fastening, suitable for applications requiring reliable rectangular connector solutions in the 2.50mm pitch category.

Key Parameters

Parameter	Value
Manufacturer Part Number	0351550402
Manufacturer	Molex
Category	Rectangular Connectors
Connector Type	Receptacle
Contact Type	Female Socket
Number of Positions	4
Pitch	0.098" (2.50mm)
Number of Rows	1
Mounting Type	Free Hanging (In-Line)
Contact Termination	Crimp
Fastening Type	Latch Lock
Color	Red
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the Molex 0351550402 are qualified based on the following critical parameters that must match exactly:

Connector Type: Receptacle
Contact Type: Female Socket
Number of Positions: 4
Pitch: 0.098" (2.50mm)
Number of Rows: 1
Mounting Type: Free Hanging (In-Line)
Contact Termination: Crimp
Fastening Type: Latch Lock
RoHS Status: ROHS3 Compliant
MSL Rating: 1 (Unlimited)

Parameters that may vary between substitutes include housing color, insulation material, operating temperature range, and manufacturer. All qualified substitutes maintain functional and mechanical compatibility with the original part specification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Connector Type	Positions	Pitch	Contact Type	Mounting Type	Termination	Fastening	Color	Product Status	RoHS	MSL
0351550402	Molex	35155	Receptacle	4	2.50mm	Female Socket	Free Hanging (In-Line)	Crimp	Latch Lock	Red	Obsolete	ROHS3	1
0351550400	Molex	35155	Receptacle	4	2.50mm	Female Socket	Free Hanging (In-Line)	Crimp	Latch Lock	Natural	Active	ROHS3	1
0511030400	Molex	Mini-Lock 51103	Receptacle	4	2.50mm	Female Socket	Free Hanging (In-Line)	Crimp	Latch Lock	White	Active	ROHS3	1
2078410004	Molex	L1NK 250 207841	Receptacle	4	2.50mm	Female Socket	Free Hanging (In-Line)	Crimp	Latch Lock	Black	Active	ROHS3	1
2110992-4	TE Connectivity AMP Connectors	Economy Power 2.5	Receptacle	4	2.50mm	Female Socket	Free Hanging (In-Line)	Crimp	Latch Lock	White	Active	ROHS3	1
DF1E-4S-2.5C	Hirose Electric Co Ltd	DF1E	Receptacle	4	2.50mm	Female Socket	Free Hanging (In-Line)	Crimp	Latch Lock	White	Active	ROHS3	1
XAP-04V-1	JST Sales America Inc.	XA	Receptacle	4	2.50mm	Female Socket	Free Hanging (In-Line)	Crimp	Latch Lock	Natural	Active	ROHS3	1

Engineering Selection Recommendations

All substitute parts listed maintain ROHS3 compliance and MSL Level 1 rating, meeting the regulatory and environmental requirements of the original part. Selection among substitutes should be based on product status and availability:

Primary Recommendation: Molex 0351550400 (Active status, same manufacturer and series as original, natural color variant)

Secondary Options: Molex 0511030400 and 2078410004 are active Molex alternatives with different series designations and color variants. Both maintain full functional compatibility.

Cross-Manufacturer Alternatives: TE Connectivity 2110992-4, Hirose DF1E-4S-2.5C, and JST XAP-04V-1 are active products from established connector manufacturers. These parts meet all critical electrical and mechanical parameters but represent different product lines.

The original part's obsolete status necessitates transition to an active equivalent. All listed substitutes are currently in production and available in commercial quantities.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts interchangeably with the Molex 0351550402?

A: Yes, all listed parts are parametric equivalents meeting the critical specifications: 4-position receptacle, 2.50mm pitch, female socket contacts, crimp termination, latch lock fastening, and free-hanging in-line mounting. Housing color differences do not affect electrical or mechanical compatibility.

Q: What is the difference between the Molex substitutes (0351550400, 0511030400, 2078410004)?

A: These parts differ in series designation, housing color, and insulation material. The 0351550400 belongs to the same 35155 series as the original part. The 0511030400 is from the Mini-Lock 51103 series with white housing. The 2078410004 is from the L1NK 250 series with black housing. All maintain identical electrical and mechanical specifications.

Q: Are cross-manufacturer parts (TE Connectivity, Hirose, JST) fully compatible?

A: Yes. The TE Connectivity 2110992-4, Hirose DF1E-4S-2.5C, and JST XAP-04V-1 meet all critical parameters for mechanical and electrical compatibility. They represent alternative product lines from different manufacturers but maintain the same connector interface specifications.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature ranges vary among substitutes but do not prevent substitution. The original part specification does not define an operating temperature range. Substitutes range from -55°C to 105°C (TE Connectivity) to -25°C to 85°C (JST). Selection should consider your application's thermal requirements.

Q: What packaging options are available?

A: Substitute parts are available in Bulk, Bag, or Bulk packaging. Packaging does not affect connector functionality and is determined by procurement and inventory requirements.

Q: Why is the original part obsolete?

A: The Molex 0351550402 is classified as obsolete, indicating it is no longer in active production. Equivalent active parts from Molex and other manufacturers provide direct functional replacements for new designs and ongoing production needs.

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