DF1B-28DP-2.5DS Equivalent & Substitute Parts

Part Overview

The DF1B-28DP-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 28 positions arranged in 2 rows with 0.098" (2.50mm) pitch spacing and shrouded 4-wall construction with push-pull fastening. The main part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-28DP-2.5DS
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, Right Angle
Shrouding	Shrouded - 4 Wall
Fastening Type	Push-Pull
Voltage Rating	250V
Operating Temperature	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-28DP-2.5DS is determined by the following critical parameters:

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, Right Angle
Shrouding: Shrouded - 4 Wall
Fastening Type: Push-Pull
Termination: Solder
Insulation Material: Polyamide (PA), Nylon
Material Flammability Rating: UL94 V-0

The identified substitute parts maintain these core parameters, ensuring mechanical and electrical compatibility with existing PCB designs and mating connectors. Variations in contact finish, voltage rating, and product status are documented in the parameter comparison table.

Parameter Comparison

Parameter	DF1B-28DP-2.5DS (Main)	DF1BZ-28DP-2.5DS	DF1B-28DP-2.5DS(01)
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
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, 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
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
Insulation Color	White	White	White
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
Voltage Rating	250V	150V	250V
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

Both substitute parts maintain full mechanical and electrical compatibility with the original DF1B-28DP-2.5DS design. Selection between substitutes depends on specific application requirements:

DF1BZ-28DP-2.5DS is an active product with RoHS compliance. This part is suitable for new designs and applications requiring regulatory compliance. The voltage rating of 150V is lower than the original specification; applications requiring 250V operation must use DF1B-28DP-2.5DS(01).

DF1B-28DP-2.5DS(01) is an active product with RoHS compliance and maintains the original 250V voltage rating. The contact finish is gold rather than tin, providing enhanced corrosion resistance and contact reliability. This part is the manufacturer-recommended substitute for direct replacement in existing designs.

For applications where the original obsolete part must be replaced, DF1B-28DP-2.5DS(01) provides the closest electrical and mechanical equivalence with active product status and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-28DP-2.5DS be used as a direct replacement for DF1B-28DP-2.5DS?

A: DF1BZ-28DP-2.5DS maintains all critical mechanical parameters and connector geometry. However, the voltage rating is 150V compared to the original 250V. Use this substitute only in applications where the operating voltage does not exceed 150V.

Q: What is the difference between DF1B-28DP-2.5DS(01) and the original part?

A: DF1B-28DP-2.5DS(01) is mechanically and electrically identical to the original part with the following differences: it is an active product with RoHS compliance, and the mating contact finish is gold (8.00µin / 0.203µm) instead of tin. The voltage rating remains 250V.

Q: Are all three parts interchangeable in existing PCB designs?

A: All three parts share identical mounting geometry, pitch spacing, row configuration, and connector interface. They are mechanically interchangeable on the PCB. Electrical compatibility depends on application voltage requirements and contact finish specifications.

Q: What is the significance of the contact finish difference?

A: The original part and DF1B-28DP-2.5DS(01) use tin finish, while DF1B-28DP-2.5DS(01) uses gold finish. Gold provides superior corrosion resistance and lower contact resistance, particularly in high-reliability applications. Tin finish is suitable for standard industrial applications.

Q: Which substitute should be selected for new product designs?

A: DF1B-28DP-2.5DS(01) is the manufacturer-recommended substitute for new designs, offering active product status, RoHS compliance, and full electrical equivalence to the original specification.

Q: Are there packaging differences between these parts?

A: The original part is listed with unspecified packaging. DF1BZ-28DP-2.5DS and DF1B-28DP-2.5DS(01) are supplied in bulk packaging.

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