HARTING 09185406321 Equivalent & Substitute Parts

Part Overview

The HARTING 09185406321 is a rectangular connector header designed for through-hole, right-angle mounting applications. This shrouded 40-position header with 2.54mm pitch serves board-to-cable/wire interconnection requirements in industrial and commercial electronics. The part is currently active in production with 816 units in stock. Equivalent and substitute parts are identified to support design flexibility, supply chain continuity, and application-specific performance requirements where the original part may be unavailable or where alternative specifications better match system requirements.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	40
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Contact Finish - Mating	Gold
Insulation Material	Polybutylene Terephthalate (PBT), Glass Filled
Operating Temperature Range	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the HARTING 09185406321 is determined by strict alignment with the following core parameters:

Connector Type & Contact Configuration: Header with male pins, 40 positions, 2 rows
Pitch Specification: 0.100" (2.54mm) mating pitch and row spacing
Mounting & Orientation: Through-hole, right-angle mounting
Shrouding: 4-wall shrouded design
Termination Method: Solder termination
Contact Finish: Gold-plated mating surface
Compliance: UL94 V-0 flammability rating, RoHS compliance, MSL 1

All substitute parts listed below meet these core electrical and mechanical parameters. Variations in contact material, contact finish thickness, insulation material composition, fastening type, and operating temperature ranges are documented to support application-specific selection where performance margins differ from the original specification.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Positions	Pitch (mm)	Mounting	Contact Material	Mating Finish	Operating Temp (°C)	Current Rating	RoHS Status	Inventory
09185406321	HARTING	SEK	40 (2x2)	2.54	Through Hole, RA	Copper Alloy	Gold	-55 ~ 125	—	ROHS3	816
30340-5002HB	3M	303	40 (2x2)	2.54	Through Hole, RA	Brass	Gold	-55 ~ 105	1A	RoHS	1549
75867-107LF	Amphenol ICC (FCI)	Quickie™	40 (2x2)	2.54	Through Hole, RA	Phosphor Bronze	Gold, GXT™	—	—	RoHS	1495
75867-307LF	Amphenol ICC (FCI)	Quickie™	40 (2x2)	2.54	Through Hole, RA	Phosphor Bronze	Gold, GXT™	—	—	RoHS	1315
D2540-5002-AR	3M	D2500	40 (2x2)	2.54	Through Hole, RA	Brass	Gold	-55 ~ 105	1.75A	ROHS3	2127
HIF3FC-40PA-2.54DS(71)	Hirose Electric Co Ltd	HIF3FC	40 (2x2)	2.54	Through Hole, RA	Brass	Gold	-55 ~ 85	1A	ROHS3	1073
N2540-5002-RB	3M	2500	40 (2x2)	2.54	Through Hole, RA	Copper Alloy	Gold	-55 ~ 105	1.75A	RoHS	7001
N2540-5003-RB	3M	2500	40 (2x2)	2.54	Through Hole, RA	Copper Alloy	Gold	-55 ~ 105	1.75A	RoHS	1231
TST-120-04-L-D-RA	Samtec Inc.	Flex Stack, TST	40 (2x2)	2.54	Through Hole, RA	Phosphor Bronze	Gold	-55 ~ 125	3.4A per Contact	ROHS3	1161
TST-120-04-S-D-RA-20	Samtec Inc.	Flex Stack, TST	40 (2x2)	2.54	Through Hole, RA	Phosphor Bronze	Gold	-55 ~ 125	3.4A per Contact	ROHS3	1081

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility)

The 3M N2540-5002-RB and N2540-5003-RB offer direct functional equivalence to the HARTING 09185406321. Both maintain copper alloy contact material, gold mating finish, identical pitch and position configuration, and RoHS compliance. The N2540 series supports 1.75A current rating across the -55°C to 105°C operating range. The primary distinction between N2540-5002-RB and N2540-5003-RB is contact post length (0.112" versus 0.155"), which affects board thickness compatibility. Selection between these variants depends on PCB thickness requirements.

Extended Temperature Performance

The Samtec TST-120-04-L-D-RA and TST-120-04-S-D-RA-20 maintain the full -55°C to 125°C operating range of the original HARTING part, matching thermal performance specifications. Both TST variants employ phosphor bronze contacts with gold finish and deliver 3.4A per contact current capacity. The TST-120-04-S-D-RA-20 variant features reduced gold finish thickness (3.0µin versus 10.0µin), which may be relevant for high-cycle mating applications. ROHS3 compliance is confirmed for both variants.

Alternative Manufacturers with Reduced Temperature Range

The 3M 30340-5002HB and D2540-5002-AR, along with Amphenol ICC Quickie™ series (75867-107LF, 75867-307LF) and Hirose HIF3FC-40PA-2.54DS(71), operate within -55°C to 105°C or lower temperature ranges. These parts are suitable for applications not requiring the extended 125°C upper limit. The 3M D2540-5002-AR supports 1.75A current rating and carries ROHS3 compliance. Amphenol ICC and Hirose variants provide alternative sourcing with established supply availability.

Compliance & Regulatory Alignment

All substitute parts maintain UL94 V-0 flammability rating and MSL 1 moisture sensitivity classification. ROHS3 compliance is confirmed for HARTING 09185406321, Samtec TST series, 3M D2540-5002-AR, and Hirose HIF3FC-40PA-2.54DS(71). The 3M 30340-5002HB, 3M N2540 series, and Amphenol ICC Quickie™ variants carry RoHS compliance without ROHS3 designation. REACH status is unaffected for all parts except Amphenol ICC variants, which are REACH Affected.

Frequently Asked Questions (FAQ)

Q: Can I substitute the HARTING 09185406321 with any of the listed parts without PCB redesign?

A: Substitution without PCB redesign requires matching mounting footprint, pitch (2.54mm), position count (40), and through-hole solder termination. All listed parts meet these core requirements. However, variations in contact post length (ranging from 0.110" to 0.177") and insulation height (ranging from 0.331" to 0.366") may affect board thickness compatibility and mating depth. Verify contact post length against your PCB thickness specification before selection.

Q: What is the difference between the 3M N2540-5002-RB and N2540-5003-RB?

A: Both parts are electrically and mechanically equivalent with identical pitch, position count, and current rating (1.75A). The primary difference is contact post length: N2540-5002-RB provides 0.112" (2.84mm) post length, while N2540-5003-RB provides 0.155" (3.94mm) post length. Selection depends on PCB thickness and solder joint depth requirements. Verify your PCB thickness specification to determine which variant is appropriate.

Q: Why do some substitute parts have lower operating temperature ranges?

A: Operating temperature range is determined by insulation material composition and contact material thermal stability. The HARTING 09185406321 and Samtec TST series support -55°C to 125°C due to polybutylene terephthalate (PBT) insulation and phosphor bronze or copper alloy contacts. The 3M 30340-5002HB and D2540-5002-AR, along with Amphenol ICC and Hirose variants, operate to 105°C or lower due to alternative insulation materials (polyester, PCT) or design specifications. Select based on your application's thermal requirements.

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

A: Gold finish thickness on mating contacts ranges from 3.0µin to 30.0µin across substitute parts. Thicker gold plating (30.0µin) provides enhanced durability for high-cycle mating applications and improved corrosion resistance. Thinner finishes (3.0µin to 10.0µin) are suitable for standard-cycle applications. The HARTING 09185406321 does not specify finish thickness, making it compatible with all listed variants. For high-reliability or high-cycle applications, select parts with 10.0µin or greater gold finish thickness.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts carry either RoHS or ROHS3 compliance designation. ROHS3 compliance (confirmed for HARTING 09185406321, Samtec TST series, 3M D2540-5002-AR, and Hirose HIF3FC-40PA-2.54DS(71)) represents the most current regulatory standard. The 3M 30340-5002HB, 3M N2540 series, and Amphenol ICC Quickie™ variants carry RoHS compliance. Both designations satisfy current regulatory requirements; ROHS3 represents the updated standard. Verify your procurement requirements to determine if ROHS3 designation is mandatory.

Q: What packaging options are available?

A: Substitute parts are supplied in Bulk, Tube, or Tray packaging. The HARTING 09185406321 is supplied in Bulk. The 3M N2540 series and 30340-5002HB are available in Bulk packaging, supporting direct integration into production workflows. Samtec TST series and Amphenol ICC Quickie™ variants are supplied in Tube packaging. The 3M D2540-5002-AR and Hirose HIF3FC-40PA-2.54DS(71) are supplied in Tray packaging. Packaging selection may affect handling, storage, and integration procedures; verify compatibility with your assembly process.

Q: Which substitute part offers the highest current capacity?

A: The Samtec TST-120-04-L-D-RA and TST-120-04-S-D-RA-20 deliver the highest current capacity at 3.4A per contact, compared to 1.75A for 3M N2540 and D2540 series, and 1A for 3M 30340-5002HB and Hirose HIF3FC-40PA-2.54DS(71). The HARTING 09185406321 does not specify current rating. Select TST variants for applications requiring high current distribution across multiple contacts.

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