3M 81068-660C07 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 81068-660C07 is a surface mount rectangular connector header designed for board-to-cable/wire applications. This 68-position header operates at 0.050" (1.27mm) pitch with dual-row configuration and shrouded design featuring latch lock/eject hooks. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

81068-660C07

3MIn Stock: 95481068-660C07 Datasheet

Current PartRFQ

81068-660C07-RB

3MIn Stock: 168481068-660C07-RB Datasheet

DirectRFQ

81068-660C07-RB

3MIn Stock: 168481068-660C07-RB Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 81068-660C07 is determined by strict equivalence across the following critical parameters:

• Connector configuration: 68 positions, 2 rows, 0.050" (1.27mm) pitch, 0.100" (2.54mm) row spacing
• Physical form factor: Surface mount, shrouded 4-wall design with latch lock/eject hooks
• Electrical characteristics: Male pin contact type, copper alloy material, 0.75A current rating
• Environmental compliance: Operating temperature range -55°C ~ 105°C, UL94 V-0 flammability rating
• Termination method: Solder termination

The identified substitute maintains identical mechanical and electrical specifications across all critical parameters. Variations in packaging format and contact finish post-plating thickness do not affect functional compatibility in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

The 81068-660C07-RB serves as a direct functional equivalent to the 81068-660C07. Both parts share identical mechanical dimensions, electrical ratings, and environmental specifications required for board-to-cable connector applications.

The 81068-660C07-RB offers two material improvements over the original part:

1. RoHS3 Compliance: The substitute achieves full RoHS3 compliance, whereas the original part is RoHS non-compliant. This addresses regulatory requirements for new designs and procurement in restricted substance environments.

2. Enhanced Post-Plating Thickness: The substitute features 250.0µin (6.35µm) tin plating on contact posts compared to 125.0µin (3.18µm) tin-lead plating on the original. This increased thickness provides improved corrosion resistance and solder joint durability.

Both parts maintain identical contact finish specifications for mating surfaces (gold plating at 30.0µin / 0.76µm), ensuring equivalent electrical performance and contact reliability.

Frequently Asked Questions (FAQ)

Q: Can the 81068-660C07-RB be used as a direct replacement for the 81068-660C07 in existing designs?

A: Yes. The substitute maintains identical connector configuration (68 positions, 2 rows, 1.27mm pitch), mounting type (surface mount), shrouding design (4-wall shrouded), and electrical ratings (0.75A, -55°C to 105°C). Physical and electrical compatibility is complete.

Q: What is the difference between the contact finish specifications?

A: The original part features tin-lead plating (125.0µin) on contact posts, while the substitute uses tin plating (250.0µin). Both provide equivalent electrical conductivity and contact reliability. The increased thickness on the substitute offers enhanced corrosion resistance over extended storage and operational periods.

Q: Does the RoHS3 compliance of the substitute affect compatibility?

A: No. RoHS3 compliance represents a material composition improvement that does not alter electrical or mechanical performance. The substitute is fully compatible with applications designed for the original part and provides enhanced regulatory compliance for new procurement.

Q: Are there packaging differences between these parts?

A: The original part is supplied in standard packaging, while the substitute is available in bulk packaging format. This is a procurement consideration only and does not affect component functionality or performance.

Q: What is the significance of the obsolete product status for both parts?

A: Both parts are classified as obsolete by the manufacturer. For new designs or long-term production requirements, consultation with 3M or authorized distributors is recommended to identify current-generation alternatives within the 810 series connector family that may offer extended availability and updated compliance certifications.