3M 3764-5503 Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 3764-5503 is a through-hole, right-angle rectangular connector header with 64 positions at 0.100" (2.54mm) pitch. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The connector features shrouded 4-wall construction with male pins, solder termination, and gold-plated mating contacts suitable for board-to-board or cable interconnection applications.

Substiute Parts

3764-5503

3MIn Stock: 7103764-5503 Datasheet

Current PartRFQ

141A12359X

Amphenol CONECIn Stock: 956141A12359X Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 3M 3764-5503 is determined by the following critical parameters:

• Connector configuration: 64-position, 2-row header with 0.100" (2.54mm) pitch in both mating and row spacing dimensions
• Mounting and orientation: Through-hole, right-angle mounting with shrouded 4-wall construction
• Contact system: Male pins with solder termination and gold-plated mating surfaces
• Electrical performance: Current rating and operating temperature range
• Regulatory compliance: Material flammability and RoHS status

The Amphenol CONEC 141A12359X meets the core dimensional and functional requirements for direct substitution, maintaining identical pitch, position count, row configuration, mounting style, and shrouding design. Both connectors employ solder termination with gold-plated mating contacts and UL94 V-0 rated insulation materials.

Parameter Comparison

Engineering Selection Recommendations

The Amphenol CONEC 141A12359X provides functional equivalence to the obsolete 3M 3764-5503 for applications requiring 64-position, 2.54mm-pitch rectangular connector headers with right-angle through-hole mounting. Both connectors share identical pitch, position count, row spacing, shrouding configuration, and contact finish specifications.

The substitute part offers the advantage of active product status and ROHS3 compliance, supporting modern procurement and regulatory requirements. The operating temperature range of the substitute (-40°C ~ 105°C) covers the majority of standard industrial applications, though designs requiring the full -55°C lower limit of the original part must evaluate thermal performance requirements independently.

The current rating difference (1A for the substitute versus 1.75A for the original) must be assessed against actual circuit requirements. Applications operating at or near the original 1.75A specification should be reviewed to confirm compatibility with the reduced rating of the substitute.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol CONEC 141A12359X directly replace the 3M 3764-5503 in existing designs?

A: Direct mechanical and electrical substitution is supported for the core connector interface. The identical pitch (0.100"), position count (64), row configuration (2 rows), mounting style (through-hole right-angle), and contact finish (gold-plated) ensure compatibility with mating connectors and PCB layouts designed for the original part. Verify that your application's current requirements do not exceed 1A and that the operating temperature range of -40°C to 105°C is acceptable.

Q: What are the key dimensional differences between these connectors?

A: Contact length specifications differ slightly. The 3M 3764-5503 has a mating contact length of 0.240" (6.10mm) and post length of 0.155" (3.94mm), while the Amphenol CONEC 141A12359X specifies 0.236" (6.00mm) mating and 0.114" (2.90mm) post length. Insulation height also varies: 0.340" (8.64mm) for the original versus 0.335" (8.51mm) for the substitute. These minor variations are within typical connector tolerance ranges and do not affect standard board-to-board or cable interconnection applications.

Q: Why does the substitute part have a lower current rating?

A: The Amphenol CONEC 141A12359X is rated for 1A per contact, compared to 1.75A for the 3M 3764-5503. Current rating is determined by contact material, plating thickness, and insulation design. Applications requiring the full 1.75A capacity should evaluate whether distributed current across multiple contacts or alternative connector families better suit the design requirements.

Q: Are there packaging or availability differences?

A: The 3M 3764-5503 is obsolete with limited remaining inventory. The Amphenol CONEC 141A12359X is an active product with standard availability through authorized distributors, supplied in bulk packaging.

Q: What is the significance of the RoHS compliance difference?

A: The 3M 3764-5503 is RoHS non-compliant, while the Amphenol CONEC 141A12359X meets ROHS3 standards. For applications subject to RoHS regulations or customer requirements, the substitute part provides regulatory alignment. Existing designs using the original part may continue operation under legacy exemptions, but new designs should incorporate the RoHS-compliant substitute.