DF1B-9P-2.5DS Equivalent & Substitute Parts

Part Overview

The DF1B-9P-2.5DS is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole, right-angle mounting with 9 positions at 0.098" (2.50mm) pitch. This connector features shrouded 4-wall construction with push-pull fastening and solder termination for board-to-cable/wire applications. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-9P-2.5DS
Manufacturer	Hirose Electric Co Ltd
Category	Rectangular Connectors
Series	DF1B
Connector Type	Header
Contact Type	Male Pin
Number of Positions	9
Number of Rows	1
Pitch - Mating	0.098" (2.50mm)
Mounting Type	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall
Termination	Solder
Fastening Type	Push-Pull
Operating Temperature	-35°C ~ 85°C
Voltage Rating	250V
Material Flammability Rating	UL94 V-0
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-9P-2.5DS is determined by the following critical parameters:

Pitch - Mating: 0.098" (2.50mm) — exact match required for mechanical and electrical compatibility
Number of Positions: 9 — must match for circuit connectivity
Connector Type: Header — must be header configuration
Contact Type: Male Pin — must be male pin for mating with female receptacles
Mounting Type: Through Hole, Right Angle — must match board mounting orientation
Shrouding: Shrouded - 4 Wall — required for keying and mechanical alignment
Termination: Solder — must support solder termination for PCB assembly
Fastening Type: Push-Pull — must match mating mechanism

Substitute parts are grouped into two categories:

Direct Series Substitutes (Hirose DF1B Family): Parts maintaining identical pitch, position count, and mechanical form factor within the same manufacturer series, with improved product status and compliance.

Cross-Manufacturer Equivalents: Parts from alternative manufacturers meeting all critical electrical and mechanical parameters, with consideration for contact material, insulation specifications, and operating temperature ranges.

Parameter Comparison

Parameter	DF1B-9P-2.5DS	DF1BZ-9P-2.5DS	DF1B-9P-2.5DS(01)	0534260910	5-103361-7
Manufacturer	Hirose	Hirose	Hirose	Molex	TE Connectivity
Product Status	Obsolete	Active	Active	Active	Active
Number of Positions	9	9	9	9	9
Pitch - Mating	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)	0.100" (2.54mm)
Connector Type	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Termination	Solder	Solder	Solder	Kinked Pin, Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Locking Ramp	Push-Pull
Contact Material	Brass	Brass	Brass	Phosphor Bronze	Phosphor Bronze
Contact Finish - Mating	Tin	Tin	Gold	Tin	Gold
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Polybutylene Terephthalate (PBTP), Glass Filled	Thermoplastic
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	-35°C ~ 85°C	-40°C ~ 105°C	-65°C ~ 105°C
Voltage Rating	250V	150V	250V	250V	Not specified
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

DF1BZ-9P-2.5DS (Hirose Direct Substitute): This part is the primary equivalent within the Hirose DF1B family. It maintains identical mechanical and electrical specifications with the original part while offering active product status and ROHS3 compliance. The voltage rating is reduced to 150V compared to the original 250V specification. Selection of this part is appropriate for applications operating within the 150V maximum voltage constraint and requiring RoHS compliance.

DF1B-9P-2.5DS(01) (Hirose Recommended Upgrade): This variant represents the manufacturer-recommended upgrade path from the obsolete DF1B-9P-2.5DS. It maintains all critical mechanical parameters and the original 250V voltage rating while offering active product status and RoHS compliance. The contact finish is upgraded to gold with reduced thickness specification (8.00µin). This part is suitable for direct replacement in existing designs requiring voltage ratings up to 250V.

0534260910 (Molex Mini-Lock 53426): This cross-manufacturer equivalent from Molex provides functional compatibility with identical pitch, position count, and mounting configuration. The part features phosphor bronze contacts with tin finish, polybutylene terephthalate insulation, and an extended operating temperature range (-40°C ~ 105°C). The fastening mechanism differs (locking ramp versus push-pull), and termination includes kinked pin option. This part is suitable for applications requiring extended temperature performance and ROHS3 compliance.

5-103361-7 (TE Connectivity AMPMODU Mod II): This TE Connectivity header operates at 0.100" (2.54mm) pitch, representing a 0.002" (0.04mm) deviation from the original specification. While this pitch difference is minor, it requires verification of mating receptacle compatibility. The part offers extended operating temperature range (-65°C ~ 105°C), gold-plated contacts, and RoHS compliance. Selection requires confirmation that existing mating connectors accommodate the 2.54mm pitch specification.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-9P-2.5DS be used as a direct replacement for DF1B-9P-2.5DS?

A: DF1BZ-9P-2.5DS maintains identical mechanical form factor and pitch specification. The primary difference is reduced voltage rating (150V versus 250V). Direct substitution is valid for applications operating at or below 150V. Verify circuit voltage requirements before implementation.

Q: What is the significance of the pitch difference in the TE Connectivity 5-103361-7?

A: The 5-103361-7 operates at 0.100" (2.54mm) pitch versus the original 0.098" (2.50mm). This 0.002" difference affects mechanical alignment with mating receptacles. Substitution requires confirmation that existing female connectors are designed for 2.54mm pitch compatibility. Mismatched pitch results in improper mating and contact failure.

Q: How do contact material differences affect performance?

A: The original DF1B-9P-2.5DS uses brass contacts with tin finish. Cross-manufacturer alternatives employ phosphor bronze (Molex 0534260910) or phosphor bronze with gold finish (TE Connectivity 5-103361-7). Phosphor bronze provides superior spring characteristics and durability. Gold plating enhances corrosion resistance and contact reliability in demanding environments. Material selection depends on application requirements for contact force retention and environmental exposure.

Q: Are there compliance implications when substituting the obsolete part?

A: The original DF1B-9P-2.5DS is RoHS non-compliant. All active substitute options (DF1BZ-9P-2.5DS, DF1B-9P-2.5DS(01), 0534260910, 5-103361-7) are RoHS compliant. New designs or systems requiring RoHS certification must implement one of the compliant alternatives. Existing legacy systems may continue using the original part if RoHS compliance is not mandated.

Q: What packaging considerations apply to these substitutes?

A: DF1BZ-9P-2.5DS is supplied in bulk packaging. DF1B-9P-2.5DS(01) packaging is not specified. Molex 0534260910 is supplied in tray packaging. TE Connectivity 5-103361-7 is supplied in tube packaging. Verify packaging compatibility with assembly processes and inventory management requirements.

Q: Does fastening type affect interchangeability?

A: The original part uses push-pull fastening. Molex 0534260910 employs locking ramp fastening. While both mechanisms provide secure mating, they are not mechanically interchangeable. Mating receptacles must be designed for the specific fastening mechanism. Verify receptacle compatibility before substitution.

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