3M 2550-6003UG Equivalent & Substitute Parts

Part Overview

The 3M 2550-6003UG is a rectangular connector header designed for through-hole mounting applications. This shrouded 50-position connector with 2.54mm pitch serves board-to-board and cable interconnection requirements. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	50
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Shrouding	Shrouded - 4 Wall
Fastening Type	Push-Pull
Operating Temperature Range	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following core parameters:

Critical Matching Parameters:

Connector Type: Header
Contact Type: Male Pin
Number of Positions: 50
Number of Rows: 2
Pitch - Mating: 0.100" (2.54mm)
Row Spacing - Mating: 0.100" (2.54mm)
Mounting Type: Through Hole
Termination: Solder
Shrouding: Shrouded - 4 Wall
Fastening Type: Push-Pull
Material Flammability Rating: UL94 V-0
Moisture Sensitivity Level: 1 (Unlimited)

All identified substitute parts meet these mandatory criteria. Variations in contact material, contact finish specifications, insulation material composition, and packaging format are permitted within the scope of electrical and mechanical compatibility.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Product Status	Contact Material	Contact Finish - Mating	Contact Finish - Post	Insulation Material	Operating Temperature	Current Rating	RoHS Status	Packaging
2550-6003UG	3M	2500	Obsolete	Copper Alloy	Gold	Tin-Lead	PCT, Polyester, Glass Filled	-55°C ~ 105°C	1.75A	RoHS non-compliant	-
D2550-6002-AR	3M	D2500	Active	Brass	Gold	Tin	PCT, Polyester, Glass Filled	-55°C ~ 105°C	1.75A	RoHS Compliant	Tray
N2550-6002-RB	3M	2500	Active	Copper Alloy	Gold	Tin	PCT, Polyester, Glass Filled	-55°C ~ 105°C	1.75A	ROHS3 Compliant	Bulk
0702465002	Molex	C-Grid 70246	Active	Phosphor Bronze	Gold	Tin	PBT, Glass Filled	-	-	ROHS3 Compliant	Bulk
0702465004	Molex	C-Grid 70246	Active	Phosphor Bronze	Gold	Tin	PBT, Glass Filled	-	-	ROHS3 Compliant	Tray
0878345011	Molex	C-Grid 87834	Active	Copper Alloy	Gold	Tin	PA46, Nylon 4/6, Glass Filled	-	-	ROHS3 Compliant	Tray
0878345021	Molex	C-Grid 87834	Active	Copper Alloy	Gold	Tin	PA, Nylon, Glass Filled	-	-	ROHS3 Compliant	Tray
0878345041	Molex	C-Grid 87834	Active	Copper Alloy	Gold	Tin	PA, Nylon, Glass Filled	-	-	ROHS3 Compliant	Tray
1-103309-0	TE Connectivity AMP Connectors	AMP-Latch	Active	Brass	Gold or Gold-Palladium	Tin-Lead	-	-65°C ~ 105°C	1A per Contact	RoHS non-compliant	Tube
1-5103308-0	TE Connectivity AMP Connectors	AMP-Latch	Active	Brass	Gold or Gold-Palladium	Tin	-	-65°C ~ 105°C	1A per Contact	ROHS3 Compliant	Tube
1-5103309-0	TE Connectivity AMP Connectors	AMP-Latch	Active	Brass	Gold or Gold-Palladium	Tin	-	-65°C ~ 105°C	1A per Contact	ROHS3 Compliant	Tube

Engineering Selection Recommendations

Primary Recommendation - 3M Series:

The 3M D2550-6002-AR and N2550-6002-RB represent the most direct substitutes, maintaining the same manufacturer ecosystem and connector series lineage. Both parts are active products with RoHS compliance status superior to the obsolete 2550-6003UG. The D2550-6002-AR offers RoHS Compliant certification with tray packaging suitable for automated assembly. The N2550-6002-RB provides ROHS3 Compliant status with bulk packaging for high-volume applications.

Secondary Recommendation - Molex C-Grid Series:

The Molex 0702465002, 0702465004, 0878345011, 0878345021, and 0878345041 connectors provide cross-manufacturer alternatives with ROHS3 Compliant certification. These parts maintain identical electrical and mechanical specifications while offering different insulation material compositions and packaging formats. The C-Grid 70246 series (0702465002, 0702465004) utilizes phosphor bronze contacts with PBT insulation. The C-Grid 87834 series (0878345011, 0878345021, 0878345041) employs copper alloy contacts with polyamide insulation and includes board guide features on select variants.

Tertiary Recommendation - TE Connectivity AMP-Latch Series:

The TE Connectivity 1-103309-0, 1-5103308-0, and 1-5103309-0 connectors offer extended operating temperature range (-65°C ~ 105°C) compared to the original part. The 1-5103308-0 and 1-5103309-0 provide ROHS3 Compliant status. These parts are suitable for applications requiring enhanced low-temperature performance.

Compliance Considerations:

For new designs requiring RoHS compliance, the 3M D2550-6002-AR, 3M N2550-6002-RB, Molex C-Grid series, and TE Connectivity 1-5103308-0 and 1-5103309-0 are appropriate selections. The 3M D2550-6002-AR and N2550-6002-RB maintain the original series designation and are recommended for direct replacement in existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 3M D2550-6002-AR directly replace the 2550-6003UG in existing designs?

A: The D2550-6002-AR meets all critical electrical and mechanical parameters required for substitution. The primary difference is the contact post material (tin versus tin-lead) and the contact material (brass versus copper alloy). These variations are within acceptable tolerances for board-to-board and cable interconnection applications. Packaging format differs (tray versus original specification), which may affect procurement and assembly processes.

Q: What is the difference between the 3M N2550-6002-RB and D2550-6002-AR?

A: Both parts are active 3M products with identical electrical and mechanical specifications. The N2550-6002-RB uses copper alloy contacts with ROHS3 Compliant certification and bulk packaging. The D2550-6002-AR uses brass contacts with RoHS Compliant certification and tray packaging. Selection depends on contact material preference, compliance requirements, and packaging format compatibility with assembly processes.

Q: Are Molex C-Grid connectors mechanically compatible with the 2550-6003UG?

A: Molex C-Grid series connectors (0702465002, 0702465004, 0878345011, 0878345021, 0878345041) maintain identical pitch, position count, row spacing, and shrouding specifications. Mechanical compatibility is established. Contact material and insulation composition differ, which may affect thermal and electrical performance characteristics in specific applications.

Q: What is the significance of the operating temperature range difference in TE Connectivity parts?

A: The TE Connectivity AMP-Latch series specifies -65°C ~ 105°C operating temperature, extending the lower temperature limit by 10°C compared to the 3M 2550-6003UG (-55°C ~ 105°C). This extended range is beneficial for applications requiring enhanced cold-temperature performance. The upper temperature limit remains equivalent.

Q: How do contact finish specifications affect substitution decisions?

A: Contact finish specifications (gold thickness, tin versus tin-lead) influence corrosion resistance, solderability, and long-term reliability. The original 2550-6003UG specifies tin-lead post finish with 200.0µin thickness. Substitute parts offer tin post finish with equivalent or superior thickness specifications. Tin post finish is acceptable for solder termination applications and provides improved environmental compliance compared to tin-lead.

Q: What packaging format considerations apply to these substitutes?

A: The original 2550-6003UG packaging format is not specified in available data. Substitute parts are available in tray, bulk, and tube packaging formats. Tray packaging (D2550-6002-AR, 0702465004, 0878345011, 0878345021, 0878345041) is suitable for automated pick-and-place assembly. Bulk packaging (N2550-6002-RB, 0702465002) accommodates manual assembly and high-volume applications. Tube packaging (1-103309-0, 1-5103308-0, 1-5103309-0) is standard for TE Connectivity distribution.

Q: Are there current rating differences between the main part and substitutes?

A: The 3M 2550-6003UG specifies 1.75A current rating. The 3M D2550-6002-AR and N2550-6002-RB maintain this 1.75A specification. Molex C-Grid series parts do not specify current rating in available data. TE Connectivity AMP-Latch series specifies 1A per contact, which is lower than the original specification. For applications requiring 1.75A current capacity, 3M substitutes are recommended.

Q: What RoHS compliance status should be selected for new designs?

A: For new designs, parts with RoHS Compliant or ROHS3 Compliant status are recommended. The 3M D2550-6002-AR (RoHS Compliant), 3M N2550-6002-RB (ROHS3 Compliant), all Molex C-Grid variants (ROHS3 Compliant), and TE Connectivity 1-5103308-0 and 1-5103309-0 (ROHS3 Compliant) meet current regulatory requirements. The original 2550-6003UG is RoHS non-compliant and unsuitable for new designs subject to RoHS directives.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message