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3M 2340-6181-TG Rectangular Connector Header - Equivalent & Substitute Parts
Part Overview
The 3M 2340-6181-TG is a through-hole rectangular connector header with 40 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This unshrouded, male pin header features kinked pin solder termination and is designed for board-to-board or cable applications. The part is currently active in production with 876 units in stock.
Equivalent and substitute parts are necessary when the original 3M 2340-6181-TG becomes unavailable, when design requirements demand RoHS compliance, or when alternative contact finishes or post lengths are required for specific application environments.
Substiute Parts
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 |
| Termination | Kinked Pin, Solder |
| Fastening Type | Push-Pull |
| Contact Length - Mating | 0.230" (5.84mm) |
| Contact Length - Post | 0.120" (3.05mm) |
| Overall Contact Length | 0.450" (11.43mm) |
| Insulation Height | 0.100" (2.54mm) |
| Contact Shape | Square |
| Contact Finish - Mating | Gold |
| Contact Finish - Post | Tin-Lead |
| Contact Material | Copper Alloy |
| Insulation Material | Thermoplastic, Glass Filled |
| Operating Temperature | -55°C ~ 105°C |
| Material Flammability Rating | UL94 V-0 |
| Insulation Color | Black |
| Current Rating | 3A |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the 3M 2340-6181-TG is determined by the following critical parameters:
Mandatory Matching Parameters:
- 40 positions in 2-row configuration
- 0.100" (2.54mm) mating pitch and row spacing
- Through-hole mounting
- Push-pull fastening type
- Square contact shape
- 3A current rating
- UL94 V-0 flammability rating
- MSL 1 (Unlimited) moisture sensitivity
Variable Parameters Affecting Substitution:
- Contact finish (Gold, Tin, or Gold with GXT™)
- Contact finish thickness on mating and post surfaces
- Contact length - post (0.095" to 0.150")
- Overall contact length (0.425" to 0.480")
- Termination style (Kinked pin solder vs. standard solder)
- Contact material (Copper alloy vs. Phosphor bronze)
- Insulation material composition
- Operating temperature range (-55°C to -65°C minimum; 105°C to 130°C maximum)
- RoHS compliance status
- Product status (Active vs. Obsolete)
Substitute parts from Amphenol ICC (FCI), Samtec Inc., and other manufacturers meeting these criteria are functionally equivalent for standard board-to-board connector applications.
Parameter Comparison
| Manufacturer | Part Number | Series | Positions | Pitch | Contact Length - Post | Overall Contact Length | Contact Finish - Mating | Contact Material | Operating Temp | RoHS Status | Product Status | Inventory |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 3M | 2340-6181-TG | 2300 | 40 (2x) | 0.100" | 0.120" | 0.450" | Gold | Copper Alloy | -55°C ~ 105°C | Non-compliant | Active | 876 |
| Amphenol ICC (FCI) | 67997-140HLF | BERGSTIK® II | 40 (2x) | 0.100" | 0.120" | 0.450" | Gold or Gold, GXT™ | Phosphor Bronze | -65°C ~ 130°C | Compliant | Active | 1047 |
| Amphenol ICC (FCI) | 67997-240HLF | BERGSTIK® II | 40 (2x) | 0.100" | 0.120" | 0.450" | Gold or Gold, GXT™ | Phosphor Bronze | -65°C ~ 130°C | Compliant | Active | 1423 |
| Amphenol ICC (FCI) | 67997-440 | BERGSTIK® II | 40 (2x) | 0.100" | 0.120" | 0.450" | Tin | Phosphor Bronze | -65°C ~ 130°C | Non-compliant | Obsolete | 887 |
| Amphenol ICC (FCI) | 68602-140HLF | BERGSTIK® II | 40 (2x) | 0.100" | 0.150" | 0.480" | Gold or Gold, GXT™ | Phosphor Bronze | -65°C ~ 130°C | Compliant | Active | 931 |
| Amphenol ICC (FCI) | 68602-440HLF | BERGSTIK® II | 40 (2x) | 0.100" | 0.150" | 0.480" | Tin | Phosphor Bronze | -65°C ~ 130°C | Compliant | Active | 2286 |
| Amphenol ICC (FCI) | 69192-140HLF | BERGSTIK® II | 40 (2x) | 0.100" | 0.120" | 0.450" | Gold or Gold, GXT™ | Phosphor Bronze | -65°C ~ 130°C | Compliant | Active | 694 |
| Amphenol ICC (FCI) | 77313-101-40LF | BERGSTIK® | 40 (2x) | 0.100" | 0.095" | 0.425" | Gold or Gold, GXT™ | Phosphor Bronze | -65°C ~ 130°C | Compliant | Active | 1145 |
| Amphenol ICC (FCI) | 77313-102-40LF | BERGSTIK® | 40 (2x) | 0.100" | 0.135" | 0.465" | Gold or Gold, GXT™ | Phosphor Bronze | -65°C ~ 130°C | Compliant | Active | 923 |
| Amphenol ICC (FCI) | 77313-118-40LF | BERGSTIK® | 40 (2x) | 0.100" | 0.120" | 0.450" | Gold or Gold, GXT™ | Phosphor Bronze | -65°C ~ 130°C | Compliant | Active | 1040 |
| Samtec Inc. | HTSW-120-07-L-D | HTSW | 40 (2x) | 0.100" | 0.100" | 0.430" | Gold | Phosphor Bronze | -55°C ~ 125°C | ROHS3 Compliant | Active | 1077 |
Engineering Selection Recommendations
For RoHS Compliance Requirements: Select from Amphenol ICC (FCI) BERGSTIK® II or BERGSTIK® series parts with RoHS Compliant status: 67997-140HLF, 67997-240HLF, 68602-140HLF, 68602-440HLF, 69192-140HLF, 77313-101-40LF, 77313-102-40LF, or 77313-118-40LF. The Samtec HTSW-120-07-L-D is ROHS3 Compliant.
For Extended Operating Temperature Range: Amphenol ICC (FCI) and Samtec parts support -65°C to 130°C or -55°C to 125°C, exceeding the original 3M part's -55°C to 105°C range.
For Identical Contact Post Length (0.120"): Direct dimensional equivalents include 67997-140HLF, 67997-240HLF, 69192-140HLF, and 77313-118-40LF.
For Active Product Status: All recommended substitutes except 67997-440 are currently in active production.
For Gold Mating Contact Finish: 67997-140HLF, 67997-240HLF, 69192-140HLF, 77313-101-40LF, 77313-102-40LF, 77313-118-40LF, and HTSW-120-07-L-D provide gold or gold with GXT™ mating contact finishes.
For Tin Mating Contact Finish: 67997-440 and 68602-440HLF provide tin mating contact finishes for applications where gold is not required.
Frequently Asked Questions (FAQ)
Q: Can I substitute the 3M 2340-6181-TG with any 40-position 2.54mm pitch header?
A: No. Substitutes must match the mandatory parameters: 40 positions in 2 rows, 0.100" (2.54mm) mating pitch and row spacing, through-hole mounting, push-pull fastening, square contact shape, 3A current rating, and UL94 V-0 flammability rating. Contact post length, overall contact length, contact finish, and contact material may vary based on application requirements.
Q: What is the difference between the Amphenol ICC BERGSTIK® II and BERGSTIK® series?
A: Both series meet the core substitution criteria. BERGSTIK® II parts (67997, 68602, 69192 base numbers) and BERGSTIK® parts (77313 base number) differ in contact post lengths and overall contact lengths. BERGSTIK® series offers more post length variations (0.095", 0.120", 0.135") compared to BERGSTIK® II (0.120", 0.150").
Q: Does the 3M 2340-6181-TG require RoHS compliance?
A: The 3M 2340-6181-TG is RoHS non-compliant. If your application requires RoHS compliance, select from the RoHS Compliant Amphenol ICC (FCI) alternatives or the ROHS3 Compliant Samtec HTSW-120-07-L-D.
Q: What is the significance of contact finish thickness differences?
A: Contact finish thickness affects durability and mating cycle life. The 3M part specifies 10.0µin (0.25µm) gold on mating contacts. Amphenol ICC alternatives offer 15.0µin to 30.0µin (0.38µm to 0.76µm) gold or GXT™ finishes, providing enhanced durability. Tin finishes are specified at 100.0µin (2.54µm).
Q: Can I use a substitute with a different contact post length?
A: Contact post length affects PCB insertion depth and solder joint formation. The 3M part specifies 0.120" (3.05mm). Substitutes with 0.095", 0.135", or 0.150" post lengths are available. Verify PCB thickness and design requirements before selecting an alternative post length.
Q: What is the difference between kinked pin and standard solder termination?
A: The 3M 2340-6181-TG uses kinked pin solder termination. Most Amphenol ICC and Samtec substitutes use standard solder termination. Both provide reliable solder joints; kinked pins offer additional mechanical retention during assembly.
Q: Is the Samtec HTSW-120-07-L-D a suitable substitute?
A: The Samtec HTSW-120-07-L-D meets core substitution criteria with 40 positions, 0.100" pitch, through-hole mounting, and 3A current rating. It operates at -55°C to 125°C (vs. the original -55°C to 105°C) and is ROHS3 Compliant. The contact post length is 0.100" (2.54mm), which is shorter than the 3M part's 0.120" (3.05mm). Verify PCB design compatibility before selection.
Q: Why is the 67997-440 marked as Obsolete?
A: The 67997-440 is an older Amphenol ICC BERGSTIK® II variant with tin mating contact finish. While 887 units remain in stock, this part is no longer in active production. For new designs, select from active status alternatives.
Q: What packaging options are available?
A: Substitute parts are available in Bag, Bulk, or unspecified packaging. Packaging does not affect electrical or mechanical compatibility; select based on procurement and inventory requirements.
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