DF1B-26DP-2.5DSA Equivalent & Substitute Parts

Part Overview

The DF1B-26DP-2.5DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting with 26 positions at 2.5mm pitch. This connector features a shrouded 4-wall design with push-pull fastening and solder termination for board-to-cable/wire applications. The part is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-26DP-2.5DSA
Manufacturer	Hirose Electric Co Ltd
Series	DF1B
Connector Type	Header
Number of Positions	26
Pitch - Mating	0.098" (2.50mm)
Number of Rows	2
Row Spacing - Mating	0.098" (2.50mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Voltage Rating	250V
Operating Temperature	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

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

Connector type (Header)
Number of positions (26)
Pitch configuration (0.098" / 2.50mm mating pitch)
Number of rows (2)
Row spacing (0.098" / 2.50mm)
Mounting method (Through Hole)
Termination type (Solder)
Fastening mechanism (Push-Pull)
Shrouding design (Shrouded - 4 Wall)
Contact type (Male Pin)
Insulation material (Polyamide/Nylon)
Voltage rating (250V)
Operating temperature range (-35°C ~ 85°C)

Two substitute parts meet these criteria and are identified as direct equivalents within the DF1B series.

Parameter Comparison

Parameter	DF1B-26DP-2.5DSA (Main)	DF1BZ-26DP-2.5DSA (Substitute)	DF1B-26DP-2.5DSA(01) (Substitute)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	DF1B	DF1B	DF1B
Product Status	Obsolete	Active	Active
Connector Type	Header	Header	Header
Number of Positions	26	26	26
Pitch - Mating	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)
Number of Rows	2	2	2
Row Spacing - Mating	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Termination	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Contact Type	Male Pin	Male Pin	Male Pin
Contact Length - Mating	0.177" (4.50mm)	0.177" (4.50mm)	0.177" (4.50mm)
Contact Length - Post	0.142" (3.60mm)	0.142" (3.60mm)	0.142" (3.60mm)
Overall Contact Length	0.417" (10.60mm)	0.417" (10.60mm)	0.417" (10.60mm)
Insulation Height	0.374" (9.50mm)	0.374" (9.50mm)	0.374" (9.50mm)
Contact Shape	Square	Square	Square
Contact Finish - Mating	Tin	Tin	Gold
Contact Finish Thickness - Mating	-	-	8.00µin (0.203µm)
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	250V	250V
Mated Stacking Heights	14mm	14mm	14mm
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040	8536.69.4040
Packaging	-	Tray	Bulk

Engineering Selection Recommendations

Both substitute parts are functionally equivalent to the DF1B-26DP-2.5DSA across all critical electrical and mechanical parameters. Selection between substitutes is determined by regulatory compliance and packaging requirements.

DF1BZ-26DP-2.5DSA is ROHS3 compliant and supplied in tray packaging. This part is suitable for applications requiring RoHS compliance and is appropriate for moderate-volume procurement with organized component handling.

DF1B-26DP-2.5DSA(01) is RoHS compliant and supplied in bulk packaging. This part features gold-plated mating contacts with specified finish thickness of 8.00µin (0.203µm), compared to tin plating on the other variants. The gold finish provides enhanced corrosion resistance and contact reliability. This part is recommended for applications requiring RoHS compliance and where superior contact durability is a design consideration.

The original DF1B-26DP-2.5DSA is obsolete and RoHS non-compliant. For new designs or ongoing procurement, either active substitute is appropriate based on compliance requirements and contact finish specifications.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-26DP-2.5DSA and DF1B-26DP-2.5DSA(01) be used interchangeably with the original DF1B-26DP-2.5DSA?

A: Both substitute parts are electrically and mechanically equivalent. They share identical connector geometry, pitch, position count, mounting method, and operating specifications. The primary differences are product status (both active versus obsolete), RoHS compliance status, and contact finish material. Interchangeability is confirmed for all functional applications.

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

A: The DF1BZ-26DP-2.5DSA features tin-plated mating contacts. The DF1B-26DP-2.5DSA(01) features gold-plated mating contacts with 8.00µin thickness. Gold plating provides superior corrosion resistance and contact reliability in demanding environments. Selection depends on application requirements and environmental exposure.

Q: Does packaging type affect electrical performance?

A: No. Packaging differences (tray versus bulk) do not affect electrical or mechanical performance. Packaging selection is based on procurement volume, component handling procedures, and inventory management requirements.

Q: Are both substitutes suitable for new product designs?

A: Both substitute parts carry active product status and are suitable for new designs. DF1BZ-26DP-2.5DSA is ROHS3 compliant. DF1B-26DP-2.5DSA(01) is RoHS compliant with gold-plated contacts. Selection should align with design compliance requirements and contact durability specifications.

Q: What is the significance of the keying slot feature?

A: The keying slot is a mechanical feature present on all three parts that prevents incorrect mating orientation. This feature is identical across the main part and both substitutes, ensuring consistent connector behavior and preventing installation errors.

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