DF1B-26DP-2.5DS Equivalent & Substitute Parts

Part Overview

The DF1B-26DP-2.5DS is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole, right-angle board-to-cable/wire applications. This connector features 26 positions arranged in 2 rows with 0.098" (2.50mm) pitch spacing and shrouded 4-wall construction with push-pull fastening. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-26DP-2.5DS
Manufacturer	Hirose Electric Co Ltd
Category	Rectangular Connectors
Series	DF1B
Connector Type	Header
Contact Type	Male Pin
Number of Positions	26
Number of Rows	2
Pitch - Mating	0.098" (2.50mm)
Row Spacing - Mating	0.098" (2.50mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Fastening Type	Push-Pull
Termination	Solder
Operating Temperature Range	-35°C ~ 85°C
Voltage Rating	250V
Material Flammability Rating	UL94 V-0
Insulation Material	Polyamide (PA), Nylon
Contact Material	Brass
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-26DP-2.5DS is determined by strict equivalence across the following critical parameters:

Connector type, contact type, and gender (Header, Male Pin)
Number of positions and row configuration (26 positions, 2 rows)
Pitch and row spacing (0.098" / 2.50mm)
Mounting style and orientation (Through Hole, Right Angle)
Shrouding configuration (Shrouded - 4 Wall)
Fastening mechanism (Push-Pull)
Termination method (Solder)
Operating temperature range (-35°C ~ 85°C)
Insulation material (Polyamide/Nylon)
Contact material (Brass)
Flammability rating (UL94 V-0)

All identified substitutes maintain these core parameters. Variations in contact finish, voltage rating, RoHS compliance status, and product status are documented but do not preclude functional substitution within the specified electrical and mechanical constraints.

Parameter Comparison

Parameter	DF1B-26DP-2.5DS (Main)	DF1BZ-26DP-2.5DS (Substitute)	DF1B-26DP-2.5DS(01) (Substitute)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	DF1B	DF1B	DF1B
Connector Type	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
Number of Positions	26	26	26
Number of Rows	2	2	2
Pitch - Mating	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)
Row Spacing - Mating	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Termination	Solder	Solder	Solder
Contact Length - Mating	0.177" (4.50mm)	0.177" (4.50mm)	0.177" (4.50mm)
Contact Length - Post	0.130" (3.30mm)	0.130" (3.30mm)	0.130" (3.30mm)
Insulation Height	0.339" (8.61mm)	0.339" (8.61mm)	0.339" (8.61mm)
Contact Shape	Square	Square	Square
Contact Finish - Mating	Tin	Tin	Gold
Contact Material	Brass	Brass	Brass
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Features	Keying Slot	Keying Slot	Keying Slot
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	White	White	White
Voltage Rating	250V	150V	250V
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

DF1BZ-26DP-2.5DS is an active direct substitute with RoHS compliance. This part maintains all mechanical and electrical compatibility with the obsolete DF1B-26DP-2.5DS. The voltage rating of 150V is lower than the original 250V specification; applications requiring the full 250V rating should not use this substitute. The tin contact finish is identical to the original part.

DF1B-26DP-2.5DS(01) is the manufacturer-recommended active substitute with RoHS compliance and full 250V voltage rating equivalence to the original part. This variant features a gold contact finish on the mating surface, which differs from the tin finish of the original. Both active substitutes are available in bulk packaging and maintain identical mechanical dimensions and mounting characteristics.

For applications where the original 250V rating is critical, DF1B-26DP-2.5DS(01) is the appropriate selection. For applications with lower voltage requirements, DF1BZ-26DP-2.5DS provides an alternative with identical mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-26DP-2.5DS be used in place of DF1B-26DP-2.5DS?

A: DF1BZ-26DP-2.5DS is mechanically and electrically compatible for applications operating at or below 150V. The 150V voltage rating of this substitute is lower than the original 250V specification. Confirm application voltage requirements before substitution.

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

A: DF1B-26DP-2.5DS and DF1BZ-26DP-2.5DS feature tin contact finish on mating surfaces. DF1B-26DP-2.5DS(01) features gold contact finish. Both finishes are compatible with standard mating connectors within the DF1B series. Gold finish provides enhanced corrosion resistance in certain environmental conditions.

Q: Are all three parts available in the same packaging?

A: DF1B-26DP-2.5DS is available in standard packaging. DF1BZ-26DP-2.5DS and DF1B-26DP-2.5DS(01) are available in bulk packaging. Confirm packaging requirements for procurement and assembly processes.

Q: What is the significance of RoHS compliance for these parts?

A: DF1B-26DP-2.5DS is RoHS non-compliant. Both DF1BZ-26DP-2.5DS and DF1B-26DP-2.5DS(01) are RoHS compliant. Applications subject to RoHS regulations must use one of the compliant substitutes.

Q: Are the mechanical dimensions identical across all three parts?

A: Yes. All three parts maintain identical pitch spacing (0.098" / 2.50mm), row configuration (2 rows, 26 positions), contact lengths, insulation height (0.339" / 8.61mm), and mounting orientation (through-hole, right-angle). Direct mechanical substitution is supported.

Q: Which substitute should be selected for new designs?

A: DF1B-26DP-2.5DS(01) is the manufacturer-recommended active substitute. It maintains the original 250V voltage rating, provides RoHS compliance, and is actively produced. This part is suitable for new design implementations.

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