DF1B-18DP-2.5DS Equivalent & Substitute Parts

Part Overview

The DF1B-18DP-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 18 positions across 2 rows with a 2.5mm pitch and push-pull fastening. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design and procurement requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-18DP-2.5DS
Manufacturer	Hirose Electric Co Ltd
Series	DF1B
Connector Type	Header
Number of Positions	18
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
Operating Temperature	-35°C ~ 85°C
Voltage Rating	250V
Material Flammability Rating	UL94 V-0
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the DF1B-18DP-2.5DS is determined by strict equivalence across the following critical parameters:

Connector Type & Configuration: Header, male pin contact type, 18 positions, 2 rows
Pitch Specifications: 0.098" (2.50mm) mating pitch and row spacing
Mounting & Orientation: Through hole, right-angle mounting
Shrouding: Shrouded 4-wall design
Fastening: Push-pull mechanism
Electrical Ratings: Voltage rating and operating temperature range
Material Compliance: UL94 V-0 flammability rating

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

Parameter Comparison

Parameter	DF1B-18DP-2.5DS (Main)	DF1BZ-18DP-2.5DS (Substitute)	DF1B-18DP-2.5DS(01) (Substitute)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	DF1B	DF1B	DF1B
Product Status	Obsolete	Active	Active
Number of Positions	18	18	18
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
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	-35°C ~ 85°C
Voltage Rating	250V	150V	250V
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Packaging	-	Bulk	Tray

Engineering Selection Recommendations

DF1BZ-18DP-2.5DS: This substitute is an active product with RoHS compliance. It maintains all core mechanical and electrical parameters of the original part. The voltage rating is 150V compared to the original 250V. Selection of this part is appropriate for applications where the 150V rating satisfies circuit requirements and RoHS compliance is mandated.

DF1B-18DP-2.5DS(01): This substitute is an active product with RoHS compliance and maintains the original 250V voltage rating. The contact finish is gold rather than tin. This part is the manufacturer-recommended replacement and is suitable for applications requiring the full 250V rating and RoHS compliance. The gold contact finish provides enhanced corrosion resistance compared to tin.

Both substitute parts are active products from the same manufacturer and series, ensuring design continuity and long-term availability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-18DP-2.5DS be used as a direct replacement for DF1B-18DP-2.5DS?

A: DF1BZ-18DP-2.5DS is mechanically and functionally equivalent with identical pitch, position count, mounting type, and shrouding. The primary difference is the voltage rating of 150V versus the original 250V. This substitute is suitable if the application circuit operates at or below 150V.

Q: What is the difference between the two substitute parts?

A: Both substitutes maintain identical mechanical dimensions and pitch specifications. DF1BZ-18DP-2.5DS has a 150V rating with tin contact finish, while DF1B-18DP-2.5DS(01) maintains the original 250V rating with gold contact finish. Both are RoHS compliant and active products.

Q: Why is the original part obsolete?

A: The DF1B-18DP-2.5DS is classified as obsolete by the manufacturer. The active alternatives DF1BZ-18DP-2.5DS and DF1B-18DP-2.5DS(01) provide equivalent functionality with improved compliance status and long-term availability.

Q: Does packaging affect electrical performance?

A: Packaging (bulk versus tray) does not affect electrical or mechanical performance. Packaging selection is determined by procurement and assembly process requirements.

Q: Are the substitute parts pin-compatible with the original?

A: Yes. Both substitute parts maintain identical pitch (2.50mm), position count (18), row configuration (2 rows), contact length, and insulation height, ensuring mechanical and electrical pin compatibility.

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

A: The tin finish on DF1BZ-18DP-2.5DS and the gold finish on DF1B-18DP-2.5DS(01) affect corrosion resistance and contact reliability. Gold provides superior corrosion resistance in harsh environments, while tin is suitable for standard applications.

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