DF1B-9P-2.5DSA Equivalent & Substitute Parts

Part Overview

The DF1B-9P-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 9 positions at 2.5mm pitch with shrouded 4-wall design and push-pull fastening. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-9P-2.5DSA
Manufacturer	Hirose Electric Co Ltd
Series	DF1B
Connector Type	Header
Number of Positions	9
Pitch - Mating	0.098" (2.50mm)
Contact Type	Male Pin
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
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-9P-2.5DSA is determined by the following critical parameters:

Connector Type & Series: Must be DF1B series header connector
Position Count & Pitch: Must maintain 9 positions at 0.098" (2.50mm) mating pitch
Contact Configuration: Male pin contacts for board-to-cable/wire applications
Mounting & Fastening: Through-hole mounting with push-pull fastening mechanism
Shrouding: Shrouded 4-wall design
Electrical Ratings: 250V voltage rating and UL94 V-0 flammability compliance
Operating Temperature Range: -35°C to 85°C

The identified substitutes maintain these core parameters while differing in product status, RoHS compliance, and contact finish specifications.

Parameter Comparison

Parameter	DF1B-9P-2.5DSA	DF1BZ-9P-2.5DSA	DF1B-9P-2.5DSA(01)
Product Status	Obsolete	Active	Active
Number of Positions	9	9	9
Pitch - Mating	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)
Contact Type	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Contact Finish - Mating	Tin	Tin	Gold
Contact Finish Thickness - Mating	Not specified	39.4µin (1.00µm)	8.00µin (0.203µm)
Voltage Rating	250V	250V	250V
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
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

DF1BZ-9P-2.5DSA is the direct functional equivalent with active product status. This part maintains identical mechanical and electrical specifications to the obsolete DF1B-9P-2.5DSA while offering RoHS compliance. The tin contact finish with 1.00µm thickness provides standard performance characteristics. This substitute is suitable for applications where RoHS compliance is required and tin plating meets contact resistance specifications.

DF1B-9P-2.5DSA(01) is the manufacturer-recommended substitute, also with active product status and RoHS compliance. This variant differs in contact finish specification, utilizing gold plating at 0.203µm thickness instead of tin. Gold contact finish provides enhanced corrosion resistance and lower contact resistance, making this option preferable for applications requiring superior long-term reliability or operating in corrosive environments. This part is designated as the manufacturer's primary recommendation for new designs.

Both substitutes are electrically and mechanically interchangeable with the obsolete original part across all critical parameters including voltage rating, operating temperature range, and flammability certification.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-9P-2.5DSA and DF1B-9P-2.5DSA(01) be used interchangeably with the original DF1B-9P-2.5DSA?

A: Both substitutes maintain identical mechanical and electrical specifications including connector type, position count, pitch, mounting method, and voltage rating. They are functionally interchangeable. The primary differences are product status (both active), RoHS compliance (both compliant), and contact finish material and thickness.

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

A: DF1BZ-9P-2.5DSA uses tin plating at 1.00µm thickness, while DF1B-9P-2.5DSA(01) uses gold plating at 0.203µm thickness. Gold provides superior corrosion resistance and lower contact resistance, beneficial for high-reliability applications. Tin plating is suitable for standard applications with adequate environmental protection.

Q: Why is DF1B-9P-2.5DSA(01) designated as the manufacturer-recommended substitute?

A: DF1B-9P-2.5DSA(01) is Hirose's primary recommendation for replacing the obsolete DF1B-9P-2.5DSA in new designs. This designation reflects the manufacturer's engineering assessment of optimal performance characteristics for this connector family.

Q: Are there packaging differences between the substitutes?

A: The original DF1B-9P-2.5DSA packaging is not specified. DF1BZ-9P-2.5DSA and DF1B-9P-2.5DSA(01) are supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.

Q: Do all three parts meet the same compliance standards?

A: All three parts meet UL94 V-0 flammability requirements and operate across -35°C to 85°C. The original part is RoHS non-compliant, while both substitutes are RoHS compliant. All three have MSL rating of 1 (Unlimited).

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