3M N2550-6002-UB Equivalent & Substitute Parts

Part Overview

The 3M N2550-6002-UB is a rectangular connector header designed for through-hole mounting applications. This connector features 50 positions arranged in 2 rows with 0.100" (2.54mm) pitch spacing, shrouded 4-wall construction, and gold-plated mating contacts. 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)
Shrouding	Shrouded - 4 Wall
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Material Flammability Rating	UL94 V-0
Operating Temperature	-55°C ~ 105°C
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

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

Critical Parameters (Must Match):

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)
Shrouding: Shrouded - 4 Wall
Mounting Type: Through Hole
Termination: Solder
Fastening Type: Push-Pull
Contact Finish - Mating: Gold
Material Flammability Rating: UL94 V-0

Allowable Variations:

Contact Material: Copper Alloy, Phosphor Bronze, or Brass
Insulation Material: PCT, PBT, or Polyamide variants (all glass-filled)
Contact Finish - Post: Tin, Tin-Lead, or equivalent
Contact Length specifications within functional tolerance
Insulation Height within functional tolerance
Operating Temperature range equal to or exceeding -55°C ~ 105°C
Packaging format (Bulk, Tray, Tube)
RoHS compliance status (both compliant and non-compliant variants acceptable)

All substitute parts listed maintain the core electrical and mechanical interface required for board-to-cable/wire connectivity in 2.54mm pitch applications.

Parameter Comparison

Parameter	N2550-6002-UB (Main)	N2550-6002-RB	0702465002	0702465004	0878345011	0878345021	0878345041	1-103308-0	1-103309-0	1-5103308-0	1-5103309-0
Manufacturer	3M	3M	Molex	Molex	Molex	Molex	Molex	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
Series	2500	2500	C-Grid 70246	C-Grid 70246	C-Grid 87834	C-Grid 87834	C-Grid 87834	AMP-Latch	AMP-Latch	AMP-Latch	AMP-Latch
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Number of Positions	50	50	50	50	50	50	50	50	50	50	50
Number of Rows	2	2	2	2	2	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Contact Shape	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square	Square
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold	Gold	Gold	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold-Palladium	Gold or Gold-Palladium
Contact Material	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Copper Alloy	Copper Alloy	Copper Alloy	Brass	Brass	Brass	Brass
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Tin	Tin	Tin-Lead	Tin-Lead	Tin	Tin
Contact Length - Mating	0.243" (6.17mm)	0.243" (6.17mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.240" (6.10mm)
Contact Length - Post	0.112" (2.84mm)	0.112" (2.84mm)	0.135" (3.43mm)	0.135" (3.43mm)	0.135" (3.43mm)	0.135" (3.43mm)	0.135" (3.43mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)	0.120" (3.05mm)
Insulation Height	0.390" (9.91mm)	0.390" (9.91mm)	0.365" (9.27mm)	0.365" (9.27mm)	0.365" (9.27mm)	0.365" (9.27mm)	0.365" (9.27mm)	0.388" (9.86mm)	0.388" (9.86mm)	0.388" (9.86mm)	0.388" (9.86mm)
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	Not specified	Not specified	Not specified	Not specified	Not specified	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	Not specified	Bulk	Bulk	Tray	Tray	Tray	Tray	Tube	Tube	Tube	Tube

Engineering Selection Recommendations

Direct 3M Series Replacement: The 3M N2550-6002-RB is the primary substitute for the obsolete N2550-6002-UB. Both parts share identical electrical and mechanical specifications within the 2500 series. The N2550-6002-RB is active in production and available in bulk packaging. The primary difference is the post contact finish (Tin versus Tin-Lead) and RoHS3 compliance status of the N2550-6002-RB, which is acceptable for new designs requiring lead-free compliance.

Molex C-Grid 70246 Series: The Molex 0702465002 (bulk packaging) and 0702465004 (tray packaging) provide functional equivalence with minor dimensional variations in contact post length (0.135" versus 0.112") and insulation height (0.365" versus 0.390"). These parts are active, RoHS3 compliant, and utilize Phosphor Bronze contacts with Tin finish. The dimensional differences remain within functional tolerance for standard 2.54mm pitch board-to-cable applications.

Molex C-Grid 87834 Series: The Molex 0878345011, 0878345021, and 0878345041 offer functional substitution with additional features including board guide provisions (0878345011 and 0878345021). These parts feature Copper Alloy contacts with Tin finish and are available in tray packaging. Insulation material varies between Polyamide (PA46) and Nylon formulations. All three variants are RoHS3 compliant and active in production.

TE Connectivity AMP-Latch Series: The TE Connectivity parts 1-103308-0, 1-103309-0, 1-5103308-0, and 1-5103309-0 provide functional equivalence with Brass contacts and gold or gold-palladium mating finish. The 1-5103308-0 and 1-5103309-0 variants are RoHS3 compliant with Tin post finish, while 1-103308-0 and 1-103309-0 are RoHS non-compliant with Tin-Lead post finish. All variants feature extended operating temperature range (-65°C ~ 105°C) and are packaged in tubes. Contact post length is 0.120" (3.05mm), intermediate between the main part and Molex variants.

Compliance Considerations: For applications requiring RoHS3 compliance, select from: N2550-6002-RB, 0702465002, 0702465004, 0878345011, 0878345021, 0878345041, 1-5103308-0, or 1-5103309-0.

For applications with legacy RoHS non-compliant requirements, the original N2550-6002-UB specifications are matched by 1-103308-0 and 1-103309-0.

Frequently Asked Questions (FAQ)

Q: Can I use Molex C-Grid 70246 parts as direct replacements for the 3M N2550-6002-UB?

A: Yes. The Molex 0702465002 and 0702465004 maintain all critical electrical and mechanical parameters: 50 positions, 2 rows, 0.100" (2.54mm) pitch, shrouded 4-wall construction, through-hole solder termination, and push-pull fastening. Minor variations in contact post length (0.135" versus 0.112") and insulation height (0.365" versus 0.390") are within functional tolerance for standard board-to-cable applications. Contact material differs (Phosphor Bronze versus Copper Alloy) but maintains equivalent electrical performance.

Q: What is the difference between the TE Connectivity 1-103309-0 and 1-5103309-0?

A: Both parts are functionally identical in electrical and mechanical specifications. The primary difference is RoHS compliance status: 1-103309-0 is RoHS non-compliant with Tin-Lead post finish, while 1-5103309-0 is ROHS3 compliant with Tin post finish. Select based on your application's regulatory requirements.

Q: Are the Molex C-Grid 87834 variants (0878345011, 0878345021, 0878345041) interchangeable?

A: These three parts share identical electrical and mechanical specifications for the 50-position 2.54mm pitch header function. Differences are limited to insulation color (Beige for 0878345011, Natural for 0878345021 and 0878345041) and the presence of board guide features in 0878345011 and 0878345021. Selection depends on mechanical assembly requirements and color coding preferences.

Q: Does packaging format affect electrical or mechanical compatibility?

A: No. Packaging format (Bulk, Tray, Tube) affects only handling, storage, and supply chain logistics. All parts with identical part numbers maintain the same electrical and mechanical specifications regardless of packaging. Select packaging based on production volume and inventory management requirements.

Q: What is the significance of contact finish thickness variations?

A: Contact finish thickness (measured in microinches or micrometers) affects durability and wear resistance during mating cycles. The N2550-6002-UB specifies 30.0µin (0.76µm) for mating contact gold finish. Substitute parts with lower thickness (e.g., 5.00µin or 5.11µin) provide reduced gold plating but maintain functional electrical contact. Higher thickness values provide extended contact life. Selection depends on expected mating cycle count and environmental exposure.

Q: Can I mix different substitute parts in the same assembly?

A: Yes, provided all parts meet the critical parameter requirements listed in the Substitute Part Grouping Explanation section. However, for production consistency and supply chain management, standardizing on a single substitute part number is recommended.

Q: What operating temperature range should I specify for Molex parts that do not list this parameter?

A: The Molex C-Grid 70246 and C-Grid 87834 series do not specify operating temperature in the provided data. For applications requiring defined temperature performance, reference the manufacturer's complete technical documentation or select TE Connectivity AMP-Latch variants, which specify -65°C ~ 105°C operating range.

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