DF1B-18DP-2.5DSA Equivalent & Substitute Parts

Part Overview

The DF1B-18DP-2.5DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting with 18 positions at 2.5mm pitch. This connector features a shrouded 4-wall design with push-pull fastening and solder termination for board-to-cable/wire applications. The main part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring compatible connectivity solutions.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-18DP-2.5DSA
Manufacturer	Hirose Electric Co Ltd
Category	Rectangular Connectors
Series	DF1B
Connector Type	Header
Contact Type	Male Pin
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
Shrouding	Shrouded - 4 Wall
Fastening Type	Push-Pull
Termination	Solder
Operating Temperature	-35°C ~ 85°C
Voltage Rating	250V
Material Flammability Rating	UL94 V-0
Mated Stacking Heights	14mm

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-18DP-2.5DSA is determined by strict equivalence across the following critical parameters:

Connector type (Header)
Contact type (Male Pin)
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)
Shrouding configuration (Shrouded - 4 Wall)
Fastening type (Push-Pull)
Termination method (Solder)
Operating temperature range (-35°C ~ 85°C)
Voltage rating (250V)
Mated stacking heights (14mm)

The identified substitute parts maintain full compatibility across all these parameters. Variations in contact finish (tin versus gold plating) and product status (obsolete versus active) do not affect mechanical or electrical interchangeability within the specified operating conditions.

Parameter Comparison

Parameter	DF1B-18DP-2.5DSA	DF1BZ-18DP-2.5DSA	DF1B-18DP-2.5DSA(01)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Product Status	Obsolete	Active	Active
Connector Type	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
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	Through Hole	Through Hole
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Termination	Solder	Solder	Solder
Contact Length - Mating	0.177" (4.50mm)	0.177" (4.50mm)	0.177" (4.50mm)
Contact Length - Post	0.142" (3.60mm)	0.142" (3.60mm)	0.142" (3.60mm)
Overall Contact Length	0.417" (10.60mm)	0.417" (10.60mm)	0.417" (10.60mm)
Insulation Height	0.374" (9.50mm)	0.374" (9.50mm)	0.374" (9.50mm)
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	250V	250V
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0
Mated Stacking Heights	14mm	14mm	14mm
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	-	Bulk	Bulk
Inventory Status	727 Pcs New Original In Stock	1174 Pcs New Original In Stock	839 Pcs New Original In Stock

Engineering Selection Recommendations

Both DF1BZ-18DP-2.5DSA and DF1B-18DP-2.5DSA(01) are direct substitutes for the obsolete DF1B-18DP-2.5DSA based on identical mechanical and electrical specifications.

DF1BZ-18DP-2.5DSA is recommended for applications requiring ROHS3 compliance with tin-plated contacts. This part maintains active product status and offers higher current inventory availability.

DF1B-18DP-2.5DSA(01) is recommended for applications requiring ROHS3 compliance with enhanced contact reliability through gold plating on mating surfaces. This part also maintains active product status and is manufacturer-recommended for new designs.

Both substitute parts are electrically and mechanically interchangeable with the original part across all specified operating conditions, temperature ranges, and voltage ratings.

Frequently Asked Questions (FAQ)

Q: Are DF1BZ-18DP-2.5DSA and DF1B-18DP-2.5DSA(01) fully interchangeable with DF1B-18DP-2.5DSA?

A: Yes. Both substitute parts maintain identical mechanical dimensions, electrical ratings, contact configurations, and operating parameters. The differences in contact finish (tin versus gold) and RoHS compliance status do not affect interchangeability within the specified operating conditions.

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

A: Contact finish affects surface conductivity and corrosion resistance. Tin-plated contacts (DF1BZ-18DP-2.5DSA) provide standard performance. Gold-plated contacts (DF1B-18DP-2.5DSA(01)) offer enhanced corrosion resistance and lower contact resistance, beneficial in high-reliability applications.

Q: Why is the original DF1B-18DP-2.5DSA marked as obsolete?

A: Product obsolescence is determined by the manufacturer. Active substitute parts are available to support existing designs and enable new implementations with current manufacturing processes and compliance standards.

Q: Do the substitute parts meet current regulatory requirements?

A: Both DF1BZ-18DP-2.5DSA and DF1B-18DP-2.5DSA(01) are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components.

Q: What packaging options are available for the substitute parts?

A: Both substitute parts are supplied in bulk packaging, suitable for production assembly and component procurement workflows.

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