DF7-8P-3.96DS(26) Equivalent & Substitute Parts

Part Overview

The DF7-8P-3.96DS(26) is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole, right-angle board-to-cable/wire applications. This 8-position connector operates at 0.156" (3.96mm) pitch with shrouded 4-wall construction and solder termination. The product is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.156" (3.96mm)
Number of Positions	8
Number of Rows	1
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Contact Shape	Square
Insulation Material	Polyamide (PA), Nylon, Glass Filled
Operating Temperature	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution of the DF7-8P-3.96DS(26) is determined by strict alignment of the following electrical and mechanical parameters:

Pitch and Position Count: 0.156" (3.96mm) pitch with 8 positions in single-row configuration
Connector Orientation: Right-angle through-hole mounting for board-to-cable/wire connections
Contact Configuration: Male pin headers with square contact geometry
Shrouding Design: 4-wall shrouded construction for mechanical alignment and polarization
Termination Method: Solder termination for permanent PCB attachment
Material Compliance: UL94 V-0 flammability rating and glass-filled insulation material

The TE Connectivity AMP Connectors part number 2-647126-8 (MTA-156 series) meets these core substitution criteria. Both connectors share identical pitch, position count, mounting orientation, contact type, shrouding configuration, and termination method. Variations in contact finish, insulation height, and operating temperature range do not prevent functional substitution when application requirements fall within the overlapping specifications.

Parameter Comparison

Parameter	DF7-8P-3.96DS(26) (Hirose)	2-647126-8 (TE Connectivity)
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Pitch - Mating	0.156" (3.96mm)	0.156" (3.96mm)
Number of Positions	8	8
Number of Rows	1	1
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder
Contact Shape	Square	Square
Insulation Material	Polyamide (PA), Nylon, Glass Filled	Thermoplastic, Glass Filled
Operating Temperature	-35°C ~ 85°C	-55°C ~ 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Contact Finish - Mating	Gold	Tin
Product Status	Obsolete	Active

Engineering Selection Recommendations

The TE Connectivity 2-647126-8 connector is the primary substitute for the obsolete DF7-8P-3.96DS(26). Selection is supported by the following factors:

Product Status: The TE Connectivity part maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete Hirose component.

Compliance and Certification: Both connectors meet UL94 V-0 flammability requirements and maintain identical electrical safety classifications under EAR99 export control designation.

Functional Equivalence: Matching pitch, position count, mounting orientation, shrouding configuration, and termination method ensure direct mechanical and electrical compatibility in board-to-cable/wire applications.

Operating Envelope: The TE Connectivity part provides an extended operating temperature range (-55°C ~ 105°C) that encompasses the original specification (-35°C ~ 85°C), offering broader environmental tolerance for applications requiring thermal margin.

Contact Finish Difference: The substitute uses tin plating instead of gold. This represents a material change that does not prevent substitution but should be evaluated against specific application requirements for contact resistance and corrosion performance in the intended environment.

Frequently Asked Questions (FAQ)

Q: Can the 2-647126-8 be used as a direct replacement for the DF7-8P-3.96DS(26)?

A: Yes. Both connectors share identical pitch (0.156"), position count (8), mounting orientation (right-angle through-hole), shrouding design (4-wall), and termination method (solder). These parameters determine mechanical and electrical compatibility for board-to-cable/wire connections.

Q: What is the significance of the contact finish difference (gold vs. tin)?

A: Contact finish affects mating surface properties and corrosion resistance. Gold provides superior corrosion resistance and lower contact resistance; tin offers cost efficiency with adequate performance in most industrial environments. Selection depends on application-specific requirements for contact reliability and environmental exposure.

Q: Does the extended operating temperature range of the TE Connectivity part affect compatibility?

A: No. The TE Connectivity part operates from -55°C ~ 105°C, which fully encompasses the original specification of -35°C ~ 85°C. This provides additional thermal margin without creating compatibility issues.

Q: Are there any packaging or inventory considerations?

A: The TE Connectivity 2-647126-8 is currently in active production with 913 pieces in stock, compared to the obsolete Hirose part with limited remaining inventory (803 pieces). For new designs or long-term support, the active TE Connectivity part is the recommended choice.

Q: What is the difference between the MTA-156 series designation and the part number?

A: MTA-156 is the product series designation for the TE Connectivity connector family. The specific part number 2-647126-8 identifies the 8-position variant within this series. Both designations refer to the same connector.

Q: Are both connectors RoHS compliant?

A: The TE Connectivity 2-647126-8 is explicitly RoHS compliant. The Hirose DF7-8P-3.96DS(26) does not specify RoHS status in the provided data. For applications requiring RoHS compliance, the TE Connectivity part is the appropriate selection.

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