Equivalent & Substitute Parts for 77317-103-12LF

Part Overview

The 77317-103-12LF is a rectangular connector header manufactured by Amphenol ICC (FCI) in the BERGSTIK® series. This through-hole, right-angle connector features 12 positions arranged in 2 rows with 0.100" (2.54mm) pitch, designed for board-to-board applications. The part is currently active in production with 792 pieces in stock. Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements, enabling component procurement flexibility and supply chain continuity.

Substiute Parts

77317-103-12LF

Amphenol ICC (FCI)In Stock: 85077317-103-12LF Datasheet

Current PartRFQ

M20-9740642

Harwin Inc.In Stock: 2641M20-9740642 Datasheet

MFR RecommendedRFQ

M20-9740646

Harwin Inc.In Stock: 2207M20-9740646 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for rectangular connectors is determined by alignment of critical mechanical and electrical parameters. The 77317-103-12LF establishes the baseline specification set. Substitute parts M20-9740642 and M20-9740646 (both Harwin Inc., M20 series) qualify as equivalents based on the following matching criteria:

• Identical mating pitch: 0.100" (2.54mm)
• Identical position count and row configuration: 12 positions, 2 rows
• Identical row spacing: 0.100" (2.54mm)
• Identical mounting type: Through hole, right angle
• Identical termination method: Solder
• Identical current rating: 3A per contact
• Identical contact type: Male pin
• Identical shrouding: Unshrouded
• Identical fastening type: Push-pull
• Identical insulation material flammability: UL94 V-0
• Identical insulation color: Black
• Identical MSL rating: 1 (Unlimited)

Variations in contact material (phosphor bronze vs. brass), contact finish specifications, and operating temperature ranges do not preclude substitution when application requirements fall within the overlapping parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

Both M20-9740642 and M20-9740646 are active production parts with ROHS3 compliance status, exceeding the RoHS compliance requirement of the primary part. The Harwin M20 series connectors maintain identical electrical performance specifications (3A per contact, UL94 V-0 flammability rating, MSL 1) and mechanical compatibility (pitch, position count, row spacing, mounting configuration).

The primary distinction between substitute options lies in contact finish specification: M20-9740642 features gold mating contact finish, while M20-9740646 features tin mating contact finish. Selection between these options depends on application-specific corrosion resistance and contact resistance requirements.

The operating temperature range of the Harwin substitutes (-40°C ~ 105°C) is narrower than the primary part (-65°C ~ 130°C). Applications requiring operation outside the -40°C to 105°C envelope require retention of the 77317-103-12LF.

Frequently Asked Questions (FAQ)

Q: What determines if M20-9740642 or M20-9740646 can replace 77317-103-12LF?

A: Substitution is valid when the application operates within the overlapping parameter envelope. Critical matching parameters include 0.100" (2.54mm) mating pitch, 12-position 2-row configuration, through-hole right-angle mounting, solder termination, 3A per contact current rating, and UL94 V-0 flammability compliance. Both Harwin parts meet these criteria.

Q: How do the contact finish differences affect substitution?

A: M20-9740642 provides gold mating contact finish, offering enhanced corrosion resistance in high-humidity or corrosive environments. M20-9740646 provides tin mating contact finish, suitable for standard industrial applications. Contact finish selection depends on environmental exposure and contact resistance requirements specific to the application.

Q: Are there temperature limitations when using Harwin substitutes?

A: Yes. The Harwin M20 series operates within -40°C to 105°C, compared to the primary part's -65°C to 130°C range. Applications requiring operation below -40°C or above 105°C must use the 77317-103-12LF or identify alternative substitutes with extended temperature ratings.

Q: Do the post length differences affect PCB layout compatibility?

A: The Harwin substitutes feature 0.118" (3.00mm) post length compared to 0.100" (2.54mm) for the primary part, and insulation height of 0.200" (5.08mm) versus 0.190" (4.83mm). These dimensional variations require verification against PCB pad layout, solder mask clearance, and component spacing to ensure mechanical fit.

Q: What is the difference between "Breakaway" and "Cuttable" connector types?

A: Both designations indicate the connector header can be separated into individual positions. The functional outcome is equivalent for board-to-board applications. Selection depends on assembly process requirements and final form factor specifications.

Q: Are the Harwin parts suitable for cable applications?

A: The Harwin M20 series supports both board-to-board and cable connection styles, providing greater application flexibility than the primary part, which is specified for board-to-board only. This expanded capability does not preclude substitution for board-to-board applications.