3M 2540-5003UB Equivalent & Substitute Parts

Part Overview

The 3M 2540-5003UB is a rectangular connector header featuring a right-angle, through-hole configuration with 40 positions at 2.54mm pitch. This shrouded, 4-wall design supports board-to-board or cable connections with solder termination and push-pull fastening. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.100" (2.54mm)
Number of Positions	40
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Fastening Type	Push-Pull
Current Rating	1.75A
Operating Temperature	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution for the 2540-5003UB is determined by strict alignment of the following parameters:

Connector type (Header), contact type (Male Pin), and mating pitch (0.100" / 2.54mm)
Position count (40) and row configuration (2 rows)
Mounting style (Through Hole, Right Angle) and shrouding (Shrouded - 4 Wall)
Termination method (Solder) and fastening mechanism (Push-Pull or compatible latch systems)
Operating temperature range (-55°C to 105°C minimum)
Flammability rating (UL94 V-0)

Substitute parts are grouped by manufacturer and product status. Active parts with current availability are prioritized over obsolete designs. Contact material, finish specifications, and insulation composition may vary within acceptable mechanical and electrical tolerances.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Product Status	Pitch (mm)	Positions	Rows	Mounting	Fastening	Operating Temp (°C)	Current Rating	RoHS Status
2540-5003UB	3M	2500	Obsolete	2.54	40	2	Through Hole, Right Angle	Push-Pull	-55 to 105	1.75A	Non-compliant
D2540-5002-AR	3M	D2500	Active	2.54	40	2	Through Hole, Right Angle	Push-Pull	-55 to 105	1.75A	ROHS3 Compliant
N2540-5002-RB	3M	2500	Active	2.54	40	2	Through Hole, Right Angle	Push-Pull	-55 to 105	1.75A	RoHS Compliant
09185406321	HARTING	SEK	Active	2.54	40	2	Through Hole, Right Angle	Latch Holder	-55 to 125	—	ROHS3 Compliant
09185406323	HARTING	SEK	Active	2.54	40	2	Through Hole, Right Angle	Latch Holder	-55 to 125	—	ROHS3 Compliant
09185407323	HARTING	SEK	Active	2.54	40	2	Through Hole, Right Angle	Latch Holder	-55 to 125	—	ROHS3 Compliant
103310-8	TE Connectivity AMP Connectors	AMP-Latch	Active	2.54	40	2	Through Hole, Right Angle	Push-Pull	-65 to 105	1A per Contact	Not applicable
3-1761605-3	TE Connectivity AMP Connectors	AMP-Latch	Active	2.54	40	2	Through Hole, Right Angle	Push-Pull	-65 to 105	1A per Contact	ROHS3 Compliant
5103310-8	TE Connectivity AMP Connectors	AMP-Latch	Active	2.54	40	2	Through Hole, Right Angle	Push-Pull	-65 to 105	1A per Contact	ROHS3 Compliant
5103311-8	TE Connectivity AMP Connectors	AMP-Latch	Active	2.54	40	2	Through Hole, Right Angle	Push-Pull	-65 to 105	1A per Contact	ROHS3 Compliant
69155-040LF	Amphenol ICC (FCI)	Quickie™	Active	2.54	40	2	Through Hole, Right Angle	Push-Pull	—	1A	RoHS Compliant

Engineering Selection Recommendations

3M Active Alternatives (Recommended for Direct Replacement)

The D2540-5002-AR and N2540-5002-RB are active 3M products that maintain the same connector family, pitch, position count, and mounting configuration as the obsolete 2540-5003UB. Both are RoHS compliant and support the same operating temperature range. The D2540-5002-AR is packaged in trays, while the N2540-5002-RB is supplied in bulk. Selection between these depends on packaging and inventory requirements.

TE Connectivity AMP-Latch Series (Extended Temperature Range)

The 103310-8, 5103310-8, and 5103311-8 are active TE Connectivity products that meet the core mechanical and electrical requirements. These parts support an extended operating temperature range (-65°C to 105°C) and maintain push-pull fastening. The 5103310-8 and 5103311-8 are ROHS3 compliant and supplied in tube packaging. The 103310-8 is supplied in bulk. Current rating is specified as 1A per contact, which is lower than the original 1.75A specification. The 3-1761605-3 variant offers ROHS3 compliance and is rated at 1A per contact with 250VAC voltage rating.

HARTING SEK Series (Extended Temperature Range)

The 09185406321, 09185406323, and 09185407323 are active HARTING products with extended operating temperature range (-55°C to 125°C) and ROHS3 compliance. These parts use latch holder fastening instead of push-pull mechanisms. Contact length specifications differ from the original part. Current rating is not specified for these variants.

Amphenol ICC Quickie™ Series

The 69155-040LF is an active Amphenol ICC product with RoHS compliance and push-pull fastening. Operating temperature range is not specified. Contact shape is circular rather than square. Current rating is 1A.

Frequently Asked Questions (FAQ)

Q: Can I use a HARTING SEK series connector as a direct replacement for the 2540-5003UB?

A: HARTING SEK connectors (09185406321, 09185406323, 09185407323) share the same mating pitch, position count, row configuration, and mounting style. However, they use latch holder fastening instead of push-pull fastening. Mechanical and electrical compatibility depends on your mating connector design. Verify that your mating connector accepts latch holder fastening before substitution.

Q: What is the difference between the 3M D2540-5002-AR and N2540-5002-RB?

A: Both are active 3M products with identical electrical and mechanical specifications. The primary difference is packaging: D2540-5002-AR is supplied in trays, while N2540-5002-RB is supplied in bulk. Select based on your procurement and assembly requirements.

Q: Are TE Connectivity AMP-Latch connectors compatible with my existing design?

A: TE Connectivity AMP-Latch series (103310-8, 3-1761605-3, 5103310-8, 5103311-8) maintain the same mating pitch, position count, and right-angle through-hole mounting. They support push-pull fastening, matching the original design. However, current rating is specified as 1A per contact, compared to 1.75A for the original part. Verify that your application does not exceed 1A per contact before substitution.

Q: Does the Amphenol ICC 69155-040LF have the same contact shape as the original part?

A: No. The 69155-040LF uses circular contacts, while the 2540-5003UB uses square contacts. This difference may affect mating connector compatibility. Verify that your mating connector accepts circular contacts before substitution.

Q: Which substitute parts are RoHS compliant?

A: The following parts are RoHS compliant: D2540-5002-AR (ROHS3), N2540-5002-RB (RoHS), 09185406321 (ROHS3), 09185406323 (ROHS3), 09185407323 (ROHS3), 3-1761605-3 (ROHS3), 5103310-8 (ROHS3), 5103311-8 (ROHS3), and 69155-040LF (RoHS). The 103310-8 has not applicable RoHS status.

Q: What packaging options are available for substitute parts?

A: Packaging varies by part number. D2540-5002-AR is supplied in trays. N2540-5002-RB, 09185406321, 09185406323, 09185407323, 103310-8, and 69155-040LF are supplied in bulk. 5103310-8 and 5103311-8 are supplied in tubes. Select based on your assembly and inventory management requirements.

Q: Can I use the 69155-040LF if my application requires 1.75A current rating?

A: No. The 69155-040LF is rated at 1A, which is below the original 1.75A specification. Use only if your application current requirements do not exceed 1A per contact.

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