Amphenol ICC 79257-524HT Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 79257-524HT is a through-hole, right-angle rectangular connector header with 24 positions at 2.54mm pitch, designed for board-to-board applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance requirements. The BERGSTIK® II series connector features unshrouded male pins with solder termination and push-pull fastening, suitable for applications requiring reliable interconnection in compact form factors.

Key Parameters

Parameter	Value
Manufacturer Part Number	79257-524HT
Manufacturer	Amphenol ICC (FCI)
Category	Rectangular Connectors
Connector Type	Header
Contact Type	Male Pin
Number of Positions	24
Number of Rows	2
Pitch - Mating	0.100" (2.54mm)
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Contact Finish - Mating	Gold or Gold, GXT™
Material Flammability Rating	UL94 V-0
Operating Temperature	-65°C ~ 130°C
Current Rating	3A
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 79257-524HT is determined by the following critical parameters:

Primary Matching Criteria:

Number of Positions: 24
Number of Rows: 2
Pitch - Mating: 0.100" (2.54mm)
Row Spacing - Mating: 0.100" (2.54mm)
Connector Type: Header
Contact Type: Male Pin
Mounting Type: Through Hole, Right Angle
Termination: Solder
Fastening Type: Push-Pull
Material Flammability Rating: UL94 V-0

Secondary Compatibility Factors:

Contact Length - Mating: Acceptable range 0.230" to 0.266"
Contact Length - Post: Acceptable range 0.110" to 0.126"
Insulation Height: Acceptable range 0.190" to 0.242"
Operating Temperature: Minimum -40°C, Maximum 105°C or higher
Current Rating: Minimum 2.5A

The substitute parts listed below meet the primary matching criteria. Variations in contact finish thickness, insulation material composition, and contact material (phosphor bronze, copper alloy, or brass) are acceptable within standard connector design tolerances for this connector class.

Parameter Comparison

Parameter	79257-524HT (Main)	0010894242 (Molex)	0010894246 (Molex)	0901220132 (Molex)	1-826634-2 (TE)	929667-02-11-I (3M)
Manufacturer	Amphenol ICC	Molex	Molex	Molex	TE Connectivity	3M
Series	BERGSTIK® II	C-Grid 70216	C-Grid 70216	C-Grid III 90122	AMPMODU Mod II	929
Number of Positions	24	24	24	24	24	22
Number of Rows	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)
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)
Connector Type	Header	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header, Breakaway	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Length - Mating	0.230" (5.84mm)	0.240" (6.10mm)	0.240" (6.10mm)	0.266" (6.75mm)	0.264" (6.70mm)	0.235" (5.97mm)
Contact Length - Post	0.120" (3.05mm)	0.110" (2.79mm)	0.110" (2.79mm)	0.114" (2.90mm)	0.126" (3.20mm)	0.405" (10.29mm)
Insulation Height	0.190" (4.83mm)	0.220" (5.60mm)	0.220" (5.60mm)	0.242" (6.14mm)	0.219" (5.56mm)	0.215" (5.45mm)
Contact Material	Phosphor Bronze	Copper Alloy	Copper Alloy	Brass	Brass	Copper Alloy
Contact Finish - Mating	Gold or Gold, GXT™	Gold	Gold	Tin	Gold	Gold
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Operating Temperature	-65°C ~ 130°C	Not specified	Not specified	Not specified	-65°C ~ 105°C	-40°C ~ 105°C
Current Rating	3A	Not specified	Not specified	Not specified	5A	2.5A
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	Not Applicable

Engineering Selection Recommendations

Primary Substitutes (24-Position, Full Compatibility):

The Molex 0010894242 and 0010894246 (C-Grid 70216 series) are direct functional equivalents with active product status and ROHS3 compliance. Both parts maintain the 24-position, 2-row configuration with 2.54mm pitch and identical row spacing. The primary distinction between these two Molex variants is contact finish thickness on the mating surface (15.0µin versus 30.0µin), with the 0010894246 providing enhanced contact durability. Both are available in tube packaging with substantial inventory levels.

The Molex 0901220132 (C-Grid III 90122 series) offers 24-position compatibility with slightly extended contact lengths and increased insulation height. This part features tin mating finish and brass contact material, providing an alternative material composition while maintaining electrical and mechanical compatibility.

The TE Connectivity 1-826634-2 (AMPMODU Mod II series) provides 24-position equivalence with the highest current rating (5A) among substitutes and extended operating temperature range to -65°C. This part features green insulation color and polybutylene terephthalate (PBT) insulation material. All substitute parts carry ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete main part.

Secondary Substitute (22-Position, Limited Compatibility):

The 3M 929667-02-11-I is a 22-position connector, representing a reduced-position variant. This part is suitable only for applications where 22 of the 24 available positions are utilized. It features the longest contact post length (0.405") among all listed parts and operates within -40°C to 105°C range with 2.5A current rating. RoHS compliance and unlimited moisture sensitivity rating are provided.

Compliance Considerations:

All substitute parts carry active product status and modern compliance certifications (ROHS3 or RoHS Compliant). Selection should prioritize parts matching the specific operating temperature and current requirements of the target application. The 1-826634-2 is recommended for applications requiring maximum current capacity or extended low-temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the 3M 929667-02-11-I (22-position) be used as a direct replacement for the 79257-524HT (24-position)?

A: The 3M part is compatible only if the application uses 22 or fewer of the 24 available positions. The reduced position count makes it unsuitable for designs requiring all 24 contact positions. Mechanical and electrical compatibility is otherwise maintained for the available positions.

Q: What is the primary difference between Molex 0010894242 and 0010894246?

A: Both parts are functionally identical C-Grid 70216 series connectors with 24 positions at 2.54mm pitch. The distinction is contact finish thickness on the mating surface: 0010894242 has 15.0µin (0.38µm) gold plating, while 0010894246 has 30.0µin (0.76µm) gold plating. The thicker plating on 0010894246 provides enhanced contact durability and wear resistance for high-cycle mating applications.

Q: Are all substitute parts RoHS compliant?

A: Yes. All five substitute parts carry RoHS compliance certifications (ROHS3 Compliant or RoHS Compliant), addressing the RoHS non-compliance status of the obsolete 79257-524HT. This compliance is mandatory for new production in regulated markets.

Q: What packaging options are available for these substitutes?

A: Molex 0010894242 and 0010894246 are supplied in tube packaging. Molex 0901220132 is supplied in tray packaging. TE Connectivity 1-826634-2 and 3M 929667-02-11-I are supplied in bulk packaging. Packaging selection should align with production volume and handling requirements.

Q: Which substitute part has the highest current rating?

A: The TE Connectivity 1-826634-2 has the highest current rating at 5A, compared to 3A for the main part and 2.5A for the 3M part. Molex parts do not specify current ratings in the provided data.

Q: Are there temperature range limitations when substituting?

A: The main part operates from -65°C to 130°C. The TE Connectivity 1-826634-2 matches the lower limit (-65°C) but is limited to 105°C maximum. The 3M part operates from -40°C to 105°C. Molex parts do not specify operating temperature ranges. Applications requiring operation above 105°C should retain the original part or consult manufacturer specifications for extended-temperature variants.

Q: What is the significance of contact material differences (phosphor bronze, copper alloy, brass)?

A: All three contact materials (phosphor bronze, copper alloy, brass) are standard for this connector class and provide equivalent electrical conductivity and mechanical performance. Material selection affects spring characteristics and wear resistance but does not impact functional compatibility for standard board-to-board applications.

Q: Can these parts be intermixed in the same assembly?

A: Yes. All substitute parts maintain identical mating pitch (2.54mm), row spacing (2.54mm), and push-pull fastening, allowing them to mate with the same receptacle connectors. However, assembly documentation should specify a single part number to ensure consistency and simplify inventory management.

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