DF1B-28DP-2.5DSA Equivalent & Substitute Parts

Part Overview

The DF1B-28DP-2.5DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting with 28 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 main part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-28DP-2.5DSA
Manufacturer	Hirose Electric Co Ltd
Category	Rectangular Connectors
Series	DF1B
Connector Type	Header
Contact Type	Male Pin
Number of Positions	28
Number of Rows	2
Pitch - Mating	0.098" (2.50mm)
Row Spacing - Mating	0.098" (2.50mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Shrouding	Shrouded - 4 Wall
Operating Temperature	-35°C ~ 85°C
Voltage Rating	250V
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-28DP-2.5DSA 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 (28 positions, 2 rows)
Pitch and row spacing (0.098" / 2.50mm)
Mounting method and termination (Through Hole, Solder)
Fastening mechanism (Push-Pull)
Shrouding design (Shrouded - 4 Wall)
Operating temperature range (-35°C ~ 85°C)
Voltage rating (250V)
Flammability rating (UL94 V-0)

The identified substitutes maintain full electrical and mechanical compatibility with the original part specification. Variations in packaging, product status, and contact finish do not affect functional interchangeability in the application.

Parameter Comparison

Parameter	DF1B-28DP-2.5DSA (Main)	DF1BZ-28DP-2.5DSA	DF1B-28DP-2.5DSA(01)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Product Status	Obsolete	Active	Active
Series	DF1B	DF1B	DF1B
Connector Type	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
Number of Positions	28	28	28
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	Through Hole	Through Hole
Termination	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
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
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	-35°C ~ 85°C
Voltage Rating	250V	250V	250V
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Insulation Color	White	White	White
Mated Stacking Heights	14mm	14mm	14mm
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	Not specified
ECCN	EAR99	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040	8536.69.4040
Packaging	Not specified	Tray	Bulk

Engineering Selection Recommendations

Both DF1BZ-28DP-2.5DSA and DF1B-28DP-2.5DSA(01) are functionally equivalent substitutes for the obsolete DF1B-28DP-2.5DSA, with full electrical and mechanical compatibility.

DF1BZ-28DP-2.5DSA is an active product with ROHS3 compliance and tray packaging. This variant is suitable for applications requiring modern regulatory compliance and standard production quantities.

DF1B-28DP-2.5DSA(01) is an active product with RoHS compliance and gold-plated mating contacts. The gold contact finish provides enhanced corrosion resistance compared to the tin finish of the original part. This variant is supplied in bulk packaging and is designated as the manufacturer-recommended substitute.

Selection between these two substitutes depends on regulatory requirements, contact finish specifications, and packaging preferences for the application.

Frequently Asked Questions (FAQ)

Q: Are DF1BZ-28DP-2.5DSA and DF1B-28DP-2.5DSA(01) directly interchangeable with DF1B-28DP-2.5DSA?

A: Yes. Both substitutes maintain identical electrical and mechanical specifications across all critical parameters including connector type, position count, pitch, mounting method, termination, fastening mechanism, and operating characteristics. They are direct functional equivalents.

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

A: The original DF1B-28DP-2.5DSA and DF1BZ-28DP-2.5DSA feature tin-plated mating contacts. The DF1B-28DP-2.5DSA(01) features gold-plated mating contacts with 8.00µin (0.203µm) thickness. Gold plating provides superior corrosion resistance and is preferred in applications with high environmental exposure or extended shelf life requirements.

Q: What are the packaging differences?

A: DF1BZ-28DP-2.5DSA is supplied in tray packaging. DF1B-28DP-2.5DSA(01) is supplied in bulk packaging. Packaging selection depends on production volume and handling requirements.

Q: Are there RoHS compliance differences?

A: The original DF1B-28DP-2.5DSA is RoHS non-compliant. DF1BZ-28DP-2.5DSA is ROHS3 compliant. DF1B-28DP-2.5DSA(01) is RoHS compliant. For applications requiring regulatory compliance with RoHS directives, either substitute is acceptable.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The substitutes maintain full compatibility with existing PCB layouts, mating connectors, and cable assemblies designed for the original DF1B-28DP-2.5DSA. No design modifications are required.

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