DF1B-2P-2.5DSA Equivalent & Substitute Parts

Part Overview

The DF1B-2P-2.5DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting in board-to-cable/wire applications. This connector features a 2-position vertical configuration with 2.5mm pitch and shrouded 4-wall design. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-2P-2.5DSA
Manufacturer	Hirose Electric Co Ltd
Series	DF1B
Connector Type	Header
Number of Positions	2
Pitch - Mating	0.098" (2.50mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Termination	Solder
Voltage Rating	250V
Operating Temperature	-35°C ~ 85°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-2P-2.5DSA is determined by the following critical parameters:

Connector type (Header)
Number of positions (2)
Pitch specification (2.5mm)
Mounting method (Through Hole)
Shrouding configuration (Shrouded - 4 Wall)
Termination type (Solder)
Voltage rating (250V)
Operating temperature range (-35°C ~ 85°C)
Insulation material (Polyamide/Nylon)
Fastening type (Push-Pull)

Two active alternatives have been identified within the DF1B series that satisfy all critical electrical and mechanical parameters. These substitutes maintain full compatibility with existing PCB layouts and mating connectors while offering improved product status and compliance certifications.

Parameter Comparison

Parameter	DF1B-2P-2.5DSA	DF1BZ-2P-2.5DSA	DF1B-2P-2.5DSA(01)
Product Status	Obsolete	Active	Active
Connector Type	Header	Header	Header
Number of Positions	2	2	2
Pitch - Mating	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder
Voltage Rating	250V	250V	250V
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	-35°C ~ 85°C
Contact Material	Brass	Brass	Brass
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Contact Finish - Mating	Tin	Tin	Gold
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0

Engineering Selection Recommendations

Both DF1BZ-2P-2.5DSA and DF1B-2P-2.5DSA(01) are active alternatives to the obsolete DF1B-2P-2.5DSA. Selection between these substitutes depends on application-specific requirements:

DF1BZ-2P-2.5DSA is the direct functional equivalent with tin-plated mating contacts, matching the original contact finish specification. This part carries ROHS3 compliance and is available in bulk packaging with higher inventory levels (500,100 pcs).

DF1B-2P-2.5DSA(01) is the manufacturer-recommended alternative, featuring gold-plated mating contacts (8.00µin/0.203µm thickness) for enhanced corrosion resistance and contact reliability. This part also carries ROHS3 compliance and is designated as the preferred replacement option by Hirose Electric Co., Ltd.

Both substitutes maintain identical electrical ratings, mechanical dimensions, and thermal specifications. The choice between tin and gold contact finishes should be based on environmental exposure, contact cycling frequency, and application reliability requirements.

Frequently Asked Questions (FAQ)

Q: Are DF1BZ-2P-2.5DSA and DF1B-2P-2.5DSA(01) fully interchangeable with the original DF1B-2P-2.5DSA?

A: Both substitutes maintain identical connector type, position count, pitch, mounting method, shrouding, and electrical ratings. They are mechanically and electrically compatible with existing PCB designs and mating connectors. The primary differences are product status (active vs. obsolete) and contact finish specifications.

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

A: The DF1BZ-2P-2.5DSA features tin-plated mating contacts, while the DF1B-2P-2.5DSA(01) features gold-plated mating contacts. Gold plating provides superior corrosion resistance and is preferred for applications with high humidity, corrosive environments, or frequent mating cycles. Tin plating is suitable for standard industrial applications with controlled environmental conditions.

Q: Why is DF1B-2P-2.5DSA(01) designated as the manufacturer-recommended substitute?

A: DF1B-2P-2.5DSA(01) is the official replacement designated by Hirose Electric Co., Ltd. for the obsolete DF1B-2P-2.5DSA. This designation reflects the manufacturer's engineering assessment of optimal compatibility and long-term availability.

Q: Are both substitutes RoHS compliant?

A: Yes, both DF1BZ-2P-2.5DSA and DF1B-2P-2.5DSA(01) carry ROHS3 compliance certification, whereas the original DF1B-2P-2.5DSA is RoHS non-compliant.

Q: What packaging options are available for these substitutes?

A: DF1BZ-2P-2.5DSA is supplied in bulk packaging. DF1B-2P-2.5DSA(01) is supplied in bulk packaging. Packaging specifications should be confirmed with the supplier for specific order requirements.

Q: Do these substitutes have the same moisture sensitivity level?

A: Yes, all three parts (original and both substitutes) have Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control requirements during storage or handling.

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