3M 2524-6002UB Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 2524-6002UB is a shrouded rectangular connector header designed for through-hole mounting in board-to-board or cable applications. This 24-position, 2-row connector operates across -55°C to 105°C and features gold-plated mating contacts with tin-lead post finishes. The part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility through matching pitch, position count, row configuration, and contact ratings while accommodating variations in mechanical design and compliance status.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	24
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Termination	Solder
Operating Temperature	-55°C ~ 105°C
Current Rating	1.75A
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the 2524-6002UB is determined by the following critical parameters:

Mandatory Matching Parameters:

Number of Positions: 24
Number of Rows: 2
Pitch - Mating: 0.100" (2.54mm)
Row Spacing - Mating: 0.100" (2.54mm)
Connector Type: Header
Contact Type: Male Pin
Mounting Type: Through Hole
Shrouding: Shrouded - 4 Wall
Termination: Solder
Fastening Type: Push-Pull

Allowable Variations:

Contact material (Copper Alloy or Brass)
Contact finish composition (Gold thickness, Tin or Tin-Lead post finishes)
Insulation material (PCT or Polyamide)
Insulation height (within mechanical envelope constraints)
Product status (Active substitutes acceptable for Obsolete main part)
RoHS and REACH compliance status
Packaging format (Tray, Tube, or bulk)

The following parts meet substitution criteria for the 2524-6002UB:

N2524-6002-RB (3M) - Direct 3M series upgrade with improved compliance
D2524-6002-AR (3M) - D2500 series variant with board-to-cable configuration
0878342441 (Molex) - C-Grid 87834 series cross-manufacturer equivalent
1-5103308-3 (TE Connectivity) - AMP-Latch series alternative
SBH11-NBPC-D12-ST-BK (Sullins) - SBH11 series option with enhanced current rating

Parameter Comparison

Parameter	2524-6002UB	N2524-6002-RB	D2524-6002-AR	0878342441	1-5103308-3	SBH11-NBPC-D12-ST-BK
Manufacturer	3M	3M	3M	Molex	TE Connectivity	Sullins
Product Status	Obsolete	Active	Active	Active	Active	Active
Number of Positions	24	24	24	24	24	24
Number of Rows	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)
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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Material	Copper Alloy	Copper Alloy	Brass	Copper Alloy	Brass	Brass
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold or Gold-Palladium	Gold
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin	Gold
Insulation Material	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	Polyamide (PA), Nylon	Not Specified	Polyamide (PA), Nylon
Insulation Height	0.390" (9.91mm)	0.390" (9.91mm)	0.253" (6.43mm)	0.365" (9.27mm)	0.388" (9.86mm)	0.358" (9.10mm)
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C	Not Specified	-65°C ~ 105°C	-40°C ~ 105°C
Current Rating	1.75A	1.75A	1.75A	Not Specified	1A per Contact	3A
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	Non-compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	Vendor Undefined	REACH Unaffected

Engineering Selection Recommendations

Primary Recommendation: N2524-6002-RB

The N2524-6002-RB is the preferred substitute for the obsolete 2524-6002UB. Both parts are from the 3M 2500 series and maintain identical electrical and mechanical specifications. The N2524-6002-RB is currently in active production status with 8,818 units in stock. This part achieves ROHS3 compliance and REACH unaffected status, addressing regulatory requirements that the original part does not meet. The transition from tin-lead to tin post finish aligns with modern manufacturing standards while maintaining electrical performance.

Secondary Recommendation: D2524-6002-AR

The D2524-6002-AR from 3M's D2500 series provides an alternative with board-to-cable configuration. This part is RoHS compliant and REACH unaffected. The reduced insulation height (0.253" versus 0.390") represents a mechanical variation that may require PCB layout verification. Contact material changes from copper alloy to brass, and contact finish thickness on mating surfaces reduces from 30.0µin to 10.0µin. These variations remain within acceptable substitution parameters for equivalent electrical function.

Cross-Manufacturer Options

The Molex 0878342441, TE Connectivity 1-5103308-3, and Sullins SBH11-NBPC-D12-ST-BK all meet core electrical compatibility criteria. Cross-manufacturer substitution requires validation of mechanical fit within existing connector receptacles and PCB footprints. The Sullins part offers enhanced current rating (3A) and operates across a narrower temperature range (-40°C to 105°C). The TE Connectivity part extends the lower operating temperature to -65°C, providing broader environmental coverage than the original specification.

Compliance Considerations

All recommended substitutes achieve UL94 V-0 flammability rating. The original 2524-6002UB is RoHS non-compliant and REACH affected. Substitution with any recommended part improves regulatory compliance posture. Organizations with RoHS or REACH requirements must select from N2524-6002-RB, D2524-6002-AR, 0878342441, or SBH11-NBPC-D12-ST-BK, all of which are ROHS3 compliant and REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can the N2524-6002-RB directly replace the 2524-6002UB without PCB modifications?

A: Yes. The N2524-6002-RB maintains identical pitch (0.100"), position count (24), row configuration (2 rows), and insulation height (0.390"). No PCB layout changes are required. The primary difference is the post finish material change from tin-lead to tin, which does not affect mechanical or electrical compatibility.

Q: What is the significance of the contact finish thickness differences shown in the parameter comparison?

A: Contact finish thickness affects long-term corrosion resistance and contact reliability. The original 2524-6002UB specifies 30.0µin (0.76µm) gold on mating contacts. Substitute parts vary from 5.11µin to 15.0µin. All values remain within industry standards for gold-plated connectors. Thinner finishes reduce material cost while maintaining electrical performance in standard operating environments.

Q: Why does the D2524-6002-AR have a lower insulation height than the original part?

A: The D2524-6002-AR is designed for board-to-cable applications rather than board-to-board configuration. The reduced insulation height (0.253" versus 0.390") reflects mechanical optimization for cable-mounted use. Verify that existing connector receptacles accommodate this dimensional change before substitution.

Q: Is the Sullins SBH11-NBPC-D12-ST-BK suitable for applications requiring the full -55°C lower temperature limit?

A: The SBH11-NBPC-D12-ST-BK operates from -40°C to 105°C, which does not meet the original -55°C specification. This part is suitable only for applications with operating temperature requirements of -40°C or higher. For applications requiring -55°C operation, select N2524-6002-RB, D2524-6002-AR, or 0878342441.

Q: What packaging formats are available for these substitute parts?

A: N2524-6002-RB is supplied in Tray packaging. D2524-6002-AR is supplied in Tray packaging. The Molex 0878342441 packaging is not specified. The TE Connectivity 1-5103308-3 is supplied in Tube packaging. The Sullins SBH11-NBPC-D12-ST-BK is supplied in Tray packaging. Verify packaging compatibility with your procurement and assembly processes.

Q: Are cross-manufacturer substitutes (Molex, TE Connectivity, Sullins) mechanically compatible with existing 3M connector receptacles?

A: Cross-manufacturer substitution requires mechanical validation. While all parts maintain the 0.100" (2.54mm) pitch and 24-position, 2-row configuration, connector receptacle designs may have manufacturer-specific tolerances. Verify mechanical fit with existing mating connectors before production implementation.

Q: What is the current rating difference between the original part and the Sullins substitute?

A: The 2524-6002UB is rated at 1.75A per contact. The SBH11-NBPC-D12-ST-BK is rated at 3A per contact. The higher current rating of the Sullins part does not create compatibility issues; it indicates enhanced current-carrying capacity. Applications requiring the full 1.75A rating are fully supported by the Sullins part.

Q: How do RoHS and REACH compliance differences affect part selection?

A: The original 2524-6002UB is RoHS non-compliant and REACH affected. All recommended substitutes are ROHS3 compliant and REACH unaffected (except TE Connectivity 1-5103308-3, which shows vendor undefined REACH status). Organizations subject to RoHS or REACH regulations must select compliant alternatives. Compliance status does not affect electrical or mechanical performance.

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