3M 81080-650C01 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 81080-650C01 is a surface mount rectangular connector header with 80 positions arranged in 2 rows at 1.27mm pitch. This component functions as a board-to-cable/wire interface with shrouded 4-wall construction and solder termination. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and procurement planning.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Number of Positions	80
Number of Rows	2
Pitch - Mating	0.050" (1.27mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Surface Mount
Shrouding	Shrouded - 4 Wall
Termination	Solder
Operating Temperature	-55°C ~ 105°C
Current Rating	0.75A
Insulation Material	Liquid Crystal Polymer (LCP)
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

The 3M 81080-650C01-RB qualifies as a direct substitute based on matching all critical electrical and mechanical parameters: identical connector type (header), contact configuration (80-position, 2-row male pins), pitch specifications (1.27mm mating, 2.54mm row spacing), mounting method (surface mount), shrouding design (4-wall), termination type (solder), operating temperature range (-55°C ~ 105°C), current rating (0.75A), and insulation material (LCP). The substitute maintains the same base product number (81080) and series designation (810), confirming functional equivalence.

Substitution is determined by the following key parameters:

Connector type and contact configuration
Position count and row arrangement
Pitch and row spacing dimensions
Mounting and termination method
Electrical ratings and temperature range
Insulation material and flammability compliance

Parameter Comparison

Parameter	81080-650C01 (Main)	81080-650C01-RB (Substitute)
Manufacturer	3M	3M
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Number of Positions	80	80
Number of Rows	2	2
Pitch - Mating	0.050" (1.27mm)	0.050" (1.27mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Surface Mount	Surface Mount
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder
Fastening Type	Latch Lock/Eject Hooks, Short	Latch Lock/Eject Hooks, Short
Contact Length - Mating	0.140" (4.66mm)	0.140" (4.66mm)
Insulation Height	0.405" (10.29mm)	0.405" (10.29mm)
Contact Shape	Square	Square
Contact Finish - Mating	Gold	Gold
Contact Finish Thickness - Mating	30.0µin (0.76µm)	30.0µin (0.76µm)
Contact Finish - Post	Tin-Lead	Tin
Contact Material	Copper Alloy	Copper Alloy
Insulation Material	Liquid Crystal Polymer (LCP)	Liquid Crystal Polymer (LCP)
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
Current Rating	0.75A	0.75A
Base Product Number	81080	81080
Product Status	Obsolete	Obsolete
RoHS Status	RoHS non-compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The 3M 81080-650C01-RB serves as a direct functional equivalent to the 81080-650C01. Both parts share identical electrical and mechanical specifications across all critical parameters. The primary distinction is regulatory compliance: the substitute part (81080-650C01-RB) carries RoHS Compliant status, whereas the main part is RoHS non-compliant. This difference reflects post-manufacturing processing or material sourcing changes while maintaining full functional compatibility.

For applications requiring RoHS compliance or new procurement, the 81080-650C01-RB is the appropriate selection. For legacy system maintenance where RoHS compliance is not mandated, either part fulfills the functional requirement. Both parts maintain identical contact finish specifications on mating surfaces (gold plating at 30.0µin thickness) and equivalent post finish durability, with the substitute featuring increased tin plating thickness (250.0µin versus 125.0µin on the original).

Frequently Asked Questions (FAQ)

Q: Are the 81080-650C01 and 81080-650C01-RB mechanically interchangeable?

A: Yes. Both parts are identical in physical dimensions, mounting footprint, connector geometry, and pin configuration. They mount to the same PCB layout and mate with identical cable connectors.

Q: What is the difference between the contact finishes on these parts?

A: The mating contact finish (gold plating) is identical on both parts at 30.0µin thickness. The post finish differs: the original uses Tin-Lead with 125.0µin thickness, while the substitute uses Tin with 250.0µin thickness. Both finishes provide equivalent solder joint reliability.

Q: Why does the substitute part have RoHS Compliant status while the original does not?

A: The RoHS status difference reflects manufacturing or material sourcing changes implemented after the original part's production. The substitute was processed to meet RoHS requirements, eliminating restricted substances such as lead from the post finish.

Q: Can I use the 81080-650C01-RB in applications originally designed for the 81080-650C01?

A: Yes. The substitute part maintains full functional equivalence across all electrical and mechanical parameters. It operates within the same temperature range (-55°C ~ 105°C), carries the same current rating (0.75A), and provides identical connector performance.

Q: Are both parts still available for procurement?

A: Both parts are classified as obsolete. Availability is limited to existing inventory. The 81080-650C01-RB is the preferred alternative for new procurement due to RoHS compliance status.

Q: What is the moisture sensitivity level for these connectors?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. These components do not require special moisture control during storage or handling.

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