78286-426HLF Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 78286-426HLF is a rectangular connector header with 26 positions at 2.54mm pitch, designed for through-hole board-to-board applications. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The BERGSTIK® II series connector provides a push-pull fastening mechanism with tin-plated phosphor bronze contacts suitable for standard signal and power distribution in legacy and current designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	78286-426HLF
Manufacturer	Amphenol ICC (FCI)
Series	BERGSTIK® II
Connector Type	Header
Contact Type	Male Pin
Number of Positions	26
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 Material	Phosphor Bronze
Contact Finish - Mating	Tin
Overall Contact Length	0.500" (12.70mm)
Insulation Height	0.100" (2.54mm)
Material Flammability Rating	UL94 V-0
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 78286-426HLF is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Number of positions: 26
Number of rows: 2
Pitch - mating: 0.100" (2.54mm)
Row spacing - mating: 0.100" (2.54mm)
Connector type: Header (male pin contact)
Mounting type: Through hole
Fastening type: Push-pull
Style: Board to board or board to cable
Termination: Solder

Allowable Variations:

Contact finish (tin, gold, or tin-lead acceptable)
Contact material (phosphor bronze, copper alloy, or brass acceptable)
Insulation material (thermoplastic, polybutylene terephthalate, liquid crystal polymer, or polyamide acceptable)
Insulation height (0.090" to 0.110" acceptable)
Overall contact length (0.452" to 0.533" acceptable)
Contact length - mating (0.228" to 0.318" acceptable)
Operating temperature range (when specified)
Current rating (when specified)

Seven substitute parts meet these criteria across TE Connectivity AMP Connectors and Harwin Inc. manufacturers, with variations in contact finish, insulation material, and product status.

Parameter Comparison

Parameter	78286-426HLF	1-104433-3	1-826632-3	6-146252-3	6-146253-3	6-146264-3	6-87543-3	87215-9	M20-9721346	M20-9761346
Manufacturer	Amphenol ICC	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	Harwin Inc.	Harwin Inc.
Number of Positions	26	26	26	26	26	26	26	26	26	26
Number of Rows	2	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)	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)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Push-Pull
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Termination	Solder	Press-Fit, Solder	Solder	Solder	Solder	Kinked Pin, Solder	Solder	Solder	Solder	Solder
Contact Material	Phosphor Bronze	Copper Alloy	Brass	Copper Alloy	Copper Alloy	Copper Alloy	Phosphor Bronze	Phosphor Bronze	Brass	Brass
Contact Finish - Mating	Tin	Gold	Gold	Gold	Gold	Gold	Tin	Gold	Tin	Tin
Overall Contact Length	0.500" (12.70mm)	0.533" (14.65mm)	0.500" (12.70mm)	0.533" (14.65mm)	0.533" (14.65mm)	0.533" (14.65mm)	0.533" (14.65mm)	0.533" (14.65mm)	0.496" (12.60mm)	0.452" (11.48mm)
Insulation Height	0.100" (2.54mm)	0.090" (2.29mm)	0.110" (2.79mm)	0.090" (2.29mm)	0.090" (2.29mm)	0.090" (2.29mm)	0.090" (2.29mm)	0.090" (2.29mm)	0.100" (2.54mm)	0.100" (2.54mm)
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	Not specified	UL94 V-0	UL94 V-0	UL94 V-0
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Obsolete	Active	Active	Active	Obsolete	Active	Active	Active	Active
RoHS Status	Not specified	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant	Not applicable	ROHS3 Compliant	ROHS3 Compliant
Current Rating (Amps)	Not specified	3A	5A	3A	3A	3A	Not specified	3A	3A per Contact	3A per Contact
Operating Temperature	Not specified	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C	-65°C ~ 105°C	Not specified	-65°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C

Engineering Selection Recommendations

Active Product Status Substitutes (Recommended for New Designs):

1-826632-3, 6-146252-3, 6-146253-3, 6-87543-3, 87215-9, M20-9721346, and M20-9761346 are all active products. Among these, 1-826632-3, 6-146252-3, and 6-146253-3 carry ROHS3 compliance certification, making them suitable for applications requiring regulatory compliance. M20-9721346 and M20-9761346 from Harwin Inc. also provide ROHS3 compliance with cuttable header functionality.

Compliance Considerations:

For applications requiring RoHS compliance, select from: 1-826632-3, 6-146252-3, 6-146253-3, 6-87543-3, M20-9721346, or M20-9761346. The 1-104433-3 and 6-146264-3 are obsolete or non-compliant and should be avoided for new production.

Contact Finish Selection:

Gold-plated mating contacts (1-104433-3, 1-826632-3, 6-146252-3, 6-146253-3, 6-146264-3, 87215-9) provide enhanced corrosion resistance compared to tin-plated contacts (78286-426HLF, 6-87543-3, M20-9721346, M20-9761346). Gold finish is preferred for applications with extended shelf life or harsh environmental exposure.

Current Rating:

1-826632-3 supports 5A per contact, exceeding the 3A rating of most alternatives. Select this part for higher current applications within the 26-position 2.54mm pitch form factor.

Temperature Range:

M20-9721346 and M20-9761346 operate from -40°C to 105°C, compared to -65°C to 105°C for TE Connectivity alternatives. For applications requiring extended low-temperature performance below -40°C, select TE Connectivity parts.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 78286-426HLF with any of these parts directly?

A: Yes, all listed parts maintain the critical mechanical and electrical parameters: 26 positions, 2 rows, 0.100" (2.54mm) pitch, through-hole mounting, push-pull fastening, and solder termination. Physical board layout compatibility requires verification of insulation height and overall contact length variations.

Q: What is the difference between tin and gold contact finishes?

A: Tin-plated contacts (78286-426HLF, 6-87543-3, M20-9721346, M20-9761346) are suitable for standard applications with moderate shelf life. Gold-plated contacts (1-104433-3, 1-826632-3, 6-146252-3, 6-146253-3, 6-146264-3, 87215-9) provide superior corrosion resistance and are preferred for long-term storage or harsh environments.

Q: Are there RoHS-compliant alternatives?

A: Yes. 1-826632-3, 6-146252-3, 6-146253-3, 6-87543-3, M20-9721346, and M20-9761346 all carry ROHS3 compliance certification. The 1-104433-3 is RoHS non-compliant and 78286-426HLF status is not specified.

Q: What is the difference between Harwin M20 series and TE Connectivity AMPMODU Mod II?

A: Both series maintain identical pitch, position count, and mounting specifications. Harwin M20 parts feature cuttable header design and operate from -40°C to 105°C. TE Connectivity AMPMODU Mod II parts operate from -65°C to 105°C and offer breakaway connector options. Contact material and finish vary between manufacturers.

Q: Which substitute has the highest current rating?

A: 1-826632-3 supports 5A per contact, compared to 3A for most alternatives. Select this part for applications requiring higher current capacity within the 26-position 2.54mm pitch connector family.

Q: Can I use parts with different insulation heights?

A: Insulation height variations (0.090" to 0.110") are mechanically acceptable within the 2.54mm pitch standard. However, verify PCB layout and mating connector cavity depth to ensure proper seating and contact engagement. Tighter tolerances may require physical validation.

Q: What is the difference between press-fit and solder termination?

A: 1-104433-3 offers both press-fit and solder termination options, providing installation flexibility. All other substitutes use solder termination exclusively. Press-fit termination eliminates soldering but requires compatible PCB pad design.

Q: Are obsolete parts still acceptable for production?

A: 1-104433-3 and 6-146264-3 are classified as obsolete. While inventory is available, active product alternatives (1-826632-3, 6-146252-3, 6-146253-3, 6-87543-3, 87215-9, M20-9721346, M20-9761346) are recommended for new designs to ensure long-term supply continuity and compliance certification.

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