3M 3440-6502UG Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3440-6502UG is a shrouded rectangular connector header with 30 positions arranged in 2 rows at 0.100" (2.54mm) pitch, designed for through-hole board-to-cable/wire applications. This part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and new design implementations. Substitute parts maintain core electrical and mechanical compatibility while offering improved availability and compliance status.

Key Parameters

Parameter	Specification
Connector Type	Header
Contact Type	Male Pin
Number of Positions	30
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 Range	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0
Contact Finish - Mating	Gold
Contact Finish - Post	Tin-Lead
Current Rating	1A
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 3440-6502UG is determined by strict equivalence across the following critical parameters:

Primary Compatibility Criteria:

Connector type (Header)
Contact type (Male Pin)
Number of positions (30)
Number of rows (2)
Pitch - mating (0.100" / 2.54mm)
Row spacing - mating (0.100" / 2.54mm)
Mounting type (Through Hole)
Shrouding configuration (Shrouded - 4 Wall)
Termination method (Solder)
Material flammability rating (UL94 V-0)
Moisture sensitivity level (1 - Unlimited)

Secondary Compatibility Parameters (Allowable Variations):

Operating temperature range (may extend beyond -55°C ~ 105°C)
Contact finish thickness (variations acceptable)
Fastening type (Latch Lock/Eject Hooks vs. Push-Pull)
Insulation material composition (PBT vs. PCT, both glass-filled polyester)
Current rating (may exceed 1A)
Contact length specifications (minor variations within tolerance)

Non-Compatible Substitutes: The part 09185347803 (HARTING 34-position IDC receptacle) does not qualify as a substitute due to fundamental differences: different connector type (receptacle vs. header), different contact type (female socket vs. male pin), different number of positions (34 vs. 30), and different termination method (IDC vs. solder).

Parameter Comparison

Parameter	3440-6502UG (Main)	N3440-6002RB	09185305914	09185306902	09185306914
Manufacturer	3M	3M	HARTING	HARTING	HARTING
Product Status	Obsolete	Active	Active	Active	Active
Connector Type	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	30	30	30	30	30
Number of Rows	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)
Row Spacing - Mating	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
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder	Solder	Solder
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Contact Finish - Mating	Gold	Gold	Gold	Gold	Gold
Contact Finish - Post	Tin-Lead	Tin	Tin	Tin	Tin
Current Rating	1A	1.75A	Not specified	Not specified	Not specified
Fastening Type	Latch Lock/Eject Hooks, Short	Push-Pull	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Long	Latch Lock/Eject Hooks, Short
Contact Length - Mating	0.240" (6.10mm)	0.240" (6.10mm)	0.228" (5.80mm)	0.240" (6.10mm)	0.228" (5.80mm)
Contact Length - Post	0.112" (2.84mm)	0.112" (2.84mm)	0.114" (2.90mm)	0.177" (4.50mm)	0.114" (2.90mm)
Overall Contact Length	0.652" (16.56mm)	0.652" (16.56mm)	0.650" (16.51mm)	0.713" (18.10mm)	0.650" (16.51mm)
Insulation Height	0.680" (17.27mm)	0.680" (17.27mm)	0.681" (17.30mm)	0.681" (17.30mm)	0.681" (17.30mm)
Insulation Material	PBT, Polyester, Glass Filled	PCT, Polyester, Glass Filled	PBT, Glass Filled	PBT, Glass Filled	PBT, Glass Filled
Insulation Color	Black	Black	Gray	Gray	Gray
RoHS Status	Non-compliant	Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Inventory Status	764 Pcs New Original	1141 Pcs New Original	980 Pcs New Original	929 Pcs New Original	916 Pcs New Original

Engineering Selection Recommendations

N3440-6002RB (3M): This part is the primary substitute for the 3440-6502UG. Both are manufactured by 3M within the same product series (3000 vs. N3440 base). The N3440-6002RB is active in production with superior inventory availability (1141 units). It achieves RoHS compliance and maintains identical mechanical dimensions and pitch specifications. The fastening mechanism differs (Push-Pull vs. Latch Lock/Eject Hooks), and the insulation material is PCT rather than PBT, but both are glass-filled polyester meeting UL94 V-0 requirements. Current rating increases to 1.75A, providing additional margin. Contact finish on the post changes from Tin-Lead to Tin, eliminating lead content for environmental compliance.

09185305914 (HARTING SEK Series): This HARTING connector provides full electrical and mechanical compatibility with identical position count, pitch, and row spacing. Operating temperature extends to -125°C, exceeding the original specification. The fastening type matches the original (Latch Lock/Eject Hooks, Short). Contact length on the mating side is slightly reduced (0.228" vs. 0.240"), and post length is marginally increased (0.114" vs. 0.112"), representing negligible dimensional variation. Insulation color differs (gray vs. black). ROHS3 compliance is achieved. Inventory availability is strong (980 units).

09185306902 (HARTING SEK Series): This variant maintains full compatibility with extended operating temperature (-55°C ~ 125°C). The fastening type is Latch Lock/Eject Hooks, Long, providing extended engagement. Contact post length is significantly longer (0.177" vs. 0.112"), resulting in overall contact length of 0.713" compared to 0.652". This configuration is suitable for applications requiring deeper board penetration or thicker PCB assemblies. ROHS3 compliance is achieved. Inventory is available (929 units).

09185306914 (HARTING SEK Series): This part mirrors the specifications of 09185305914 with identical fastening type (Latch Lock/Eject Hooks, Short), contact dimensions, and operating temperature range (-55°C ~ 125°C). ROHS3 compliance is achieved. Inventory availability is 916 units.

Selection Criteria by Application:

For direct replacement with minimal design changes: N3440-6002RB
For extended temperature operation: 09185305914, 09185306902, or 09185306914
For applications requiring deeper contact post engagement: 09185306902
For RoHS3 compliance requirement: Any HARTING option or N3440-6002RB

Frequently Asked Questions (FAQ)

Q: Can the N3440-6002RB directly replace the 3440-6502UG without PCB redesign?

A: Yes. Both parts maintain identical pitch (0.100" / 2.54mm), row spacing (0.100" / 2.54mm), number of positions (30), and mounting type (through hole). The fastening mechanism differs (Push-Pull vs. Latch Lock/Eject Hooks), but this does not affect PCB footprint or electrical connectivity. The insulation height is identical (0.680" / 17.27mm).

Q: What is the significance of the contact finish change from Tin-Lead to Tin?

A: Tin-Lead finish contains lead, which is restricted under RoHS regulations. Tin finish eliminates lead content while maintaining electrical conductivity and contact reliability. This change is necessary for compliance with environmental and regulatory standards in most markets.

Q: Are the HARTING SEK series connectors (09185305914, 09185306902, 09185306914) mechanically interchangeable?

A: All three HARTING parts share identical pitch, row spacing, position count, and mounting type. The primary differences are fastening type (Short vs. Long hooks) and contact post length. The Short hook variants (09185305914 and 09185306914) are mechanically equivalent to each other. The Long hook variant (09185306902) has extended post length (0.177" vs. 0.114"), which may affect compatibility with existing mating connectors or cable assemblies designed for standard post length.

Q: What is the impact of operating temperature range extension from -55°C ~ 105°C to -55°C ~ 125°C?

A: The extended upper temperature limit of 125°C (vs. 105°C) provides additional thermal margin for applications operating in elevated ambient conditions or with high-current density. This does not affect applications operating within the original -55°C ~ 105°C range. The extended range is a performance enhancement with no negative impact on existing designs.

Q: Why does the 09185306902 have a significantly longer contact post (0.177" vs. 0.112")?

A: The extended post length accommodates thicker PCB assemblies or applications requiring deeper board penetration. This variant is suitable for multi-layer boards or assemblies where standard post length is insufficient. Existing designs using standard post length connectors should not use this variant without mechanical verification.

Q: Are all substitute parts RoHS compliant?

A: The N3440-6002RB is RoHS compliant. All three HARTING variants (09185305914, 09185306902, 09185306914) are ROHS3 compliant. The original 3440-6502UG is RoHS non-compliant. For applications requiring RoHS compliance, any of the substitute parts are suitable.

Q: What is the difference between the insulation materials (PBT vs. PCT)?

A: Both PBT (Polybutylene Terephthalate) and PCT (Polycyclohexylenedimethylene Terephthalate) are glass-filled polyester materials meeting UL94 V-0 flammability requirements. PCT offers slightly improved thermal and chemical resistance compared to PBT. Both materials are suitable for the specified operating temperature ranges and provide equivalent electrical insulation properties.

Q: Can I use 09185347803 as a substitute?

A: No. The 09185347803 is a 34-position IDC receptacle connector, fundamentally different from the 30-position solder header. It has female sockets instead of male pins, uses ribbon cable termination instead of solder, and is designed for free-hanging applications. This part is not compatible with the 3440-6502UG application.

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