3M 924527-28-29-EU Rectangular Connector Header - Equivalent & Substitute Parts

Part Overview

The 3M 924527-28-29-EU is a through-hole rectangular connector header with 58 positions arranged in 2 rows at 0.100" (2.54mm) pitch. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The connector features male pins with gold-plated mating contacts, solder termination, and push-pull fastening, suitable for board-to-board applications in industrial and commercial electronics.

Key Parameters

Parameter	Specification
Connector Type	Header
Contact Type	Male Pin
Number of Positions	58
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold
Insulation Material	Polycyclohexylenedimethylene Terephthalate (PCT)
Operating Temperature	-40°C ~ 105°C
Current Rating	2.5A
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following critical parameters:

Core Compatibility Requirements:

Number of Positions: 58
Number of Rows: 2
Pitch - Mating: 0.100" (2.54mm)
Row Spacing - Mating: 0.100" (2.54mm)
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Fastening Type: Push-Pull
Style: Board to Board (or Board to Board or Cable)
Shrouding: Unshrouded

Acceptable Variations:

Contact Finish - Mating: Gold or Tin (both provide adequate electrical performance)
Insulation Material: PCT or Liquid Crystal Polymer (LCP), Glass Filled (both meet UL94 V-0)
Contact Length - Mating: Variations permitted within mechanical envelope constraints
Contact Length - Post: Variations permitted based on PCB thickness requirements
Manufacturer: 3M, Molex, Samtec Inc.

Non-Substitutable Parameters:

Number of Positions and Rows (electrical interface definition)
Pitch specifications (mechanical interface definition)
Mounting type (PCB assembly method)
Fastening mechanism (connector retention method)

Parameter Comparison

Parameter	924527-28-29-EU (3M)	929715-06-29-EU (3M)	0702800737 (Molex)	0702800777 (Molex)	0702800817 (Molex)	0702871076 (Molex)	0702871174 (Molex)	0702871272 (Molex)	BBD-129-T-A (Samtec)
Connector Type	Header	Header	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Number of Positions	58	58	58	58	58	58	58	58	58
Number of Rows	2	2	2	2	2	2	2	2	2
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder	Solder	Solder	Kinked Pin, Solder	Kinked Pin, Solder	Kinked Pin, Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Gold	Gold	Tin	Gold	Gold	Tin	Gold	Gold	Tin
Insulation Material	PCT	PCT	LCP, Glass Filled	LCP, Glass Filled	LCP, Glass Filled	LCP, Glass Filled	LCP, Glass Filled	LCP, Glass Filled	Polyester, Glass Filled
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	Not specified	Not specified	Not specified	Not specified	Not specified	Not specified	-55°C ~ 125°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	Not specified
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: 929715-06-29-EU (3M)

The 3M 929715-06-29-EU is the manufacturer-recommended direct substitute. It maintains identical electrical and mechanical specifications to the 924527-28-29-EU while offering active product status. Both components share the same 3M 92X/929 series lineage, identical pitch and position configuration, and equivalent operating temperature range. The 929715-06-29-EU carries RoHS Compliant certification and REACH Unaffected status, supporting modern regulatory requirements.

Secondary Recommendations: Molex C-Grid 70280 and 70287 Series

The Molex 0702800737, 0702800777, 0702800817, 0702871076, 0702871174, and 0702871272 connectors provide functional equivalence with the following considerations:

All Molex options maintain the 58-position, 2-row, 0.100" pitch configuration
Molex C-Grid 70280 series (0702800737, 0702800777, 0702800817) feature shorter overall contact length (0.595" vs. 1.128"), suitable for applications with reduced PCB thickness requirements
Molex C-Grid 70287 series (0702871076, 0702871174, 0702871272) incorporate kinked pin termination for enhanced mechanical retention
All Molex variants carry ROHS3 Compliant and REACH Unaffected certifications
Contact finish options include both Tin and Gold to match design requirements

Alternative Recommendation: BBD-129-T-A (Samtec Inc.)

The Samtec BBD-129-T-A maintains core electrical compatibility with 58 positions, 2 rows, and 0.100" pitch. This option features an extended operating temperature range (-55°C ~ 125°C) suitable for industrial and aerospace applications. The BBD series uses circular contact geometry and polyester glass-filled insulation. ROHS3 Compliant and REACH Unaffected certifications are provided.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 924527-28-29-EU with any of these parts directly?

A: Yes, all listed parts maintain the critical electrical and mechanical parameters: 58 positions, 2 rows, 0.100" (2.54mm) pitch, male pins, through-hole mounting, solder termination, and push-pull fastening. The 3M 929715-06-29-EU is the manufacturer-recommended substitute. Molex and Samtec options are functionally equivalent but may require PCB layout verification due to variations in contact length and post geometry.

Q: What is the difference between the Molex C-Grid 70280 and 70287 series?

A: The primary difference is termination style. The 70280 series uses standard solder termination with longer post length (0.185"), while the 70287 series incorporates kinked pin termination with shorter post length (0.125"). The kinked pin design provides improved mechanical retention during PCB assembly. Both series maintain identical pitch, position count, and electrical performance.

Q: Does contact finish affect compatibility?

A: Contact finish (Gold vs. Tin) does not affect electrical compatibility for standard applications. Both finishes provide adequate conductivity and corrosion resistance. Gold-plated contacts (0702800777, 0702800817, 0702871174, 0702871272) offer enhanced performance in high-reliability or corrosive environments. Tin-plated contacts (0702800737, 0702871076) are suitable for general industrial applications.

Q: What is the significance of the "Breakaway" designation on Molex parts?

A: The "Breakaway" feature allows individual connector sections to be separated from the main header strip, enabling flexible configuration for custom pin counts. This does not affect compatibility with standard 58-position applications where the full header is required.

Q: Are there temperature rating differences I should consider?

A: The original 924527-28-29-EU and 929715-06-29-EU operate from -40°C to 105°C. The Samtec BBD-129-T-A extends this range to -55°C to 125°C, making it suitable for extreme temperature environments. Molex parts do not specify operating temperature limits in the provided data. For applications within -40°C to 105°C, all substitutes are equivalent.

Q: What compliance certifications should I verify for my application?

A: All substitute parts carry UL94 V-0 material flammability ratings. The 3M 929715-06-29-EU, all Molex variants, and Samtec BBD-129-T-A are ROHS3 Compliant and REACH Unaffected. Verify these certifications align with your end-product regulatory requirements before final selection.

Q: Can I mix and match different substitute parts in the same design?

A: While all parts maintain electrical compatibility, physical differences in contact length and post geometry may affect PCB layout and mating connector alignment. Standardize on a single substitute part number throughout a design to ensure consistent assembly and performance.

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