DF1B-18P-2.5DSA(01) Equivalent & Substitute Parts

Part Overview

The DF1B-18P-2.5DSA(01) is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting in board-to-cable/wire applications. This 18-position, single-row connector operates at 250V with a 2.5mm pitch and features shrouded 4-wall construction with push-pull fastening. The part is currently in Last Time Buy status, indicating production discontinuation. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for existing applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-18P-2.5DSA(01)
Manufacturer	Hirose Electric Co Ltd
Series	DF1B
Connector Type	Header
Number of Positions	18
Pitch - Mating	0.098" (2.50mm)
Mounting Type	Through Hole
Shrouding	Shrouded - 4 Wall
Voltage Rating	250V
Operating Temperature	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0
RoHS Status	RoHS Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-18P-2.5DSA(01) is determined by the following critical parameters:

Connector Type & Series: Must be Header type within the DF1B series family
Position Count & Pitch: Must maintain 18 positions with 0.098" (2.50mm) mating pitch
Mounting Configuration: Must support through-hole mounting with board-to-cable/wire style
Electrical Ratings: Must meet or exceed 250V voltage rating and -35°C ~ 85°C operating temperature range
Mechanical Compatibility: Must feature shrouded 4-wall construction with push-pull fastening and solder termination
Compliance: Must maintain UL94 V-0 flammability rating and RoHS compliance

The DF1BZ-18P-2.5DSA meets all substitution criteria within the DF1B rectangular connector family.

Parameter Comparison

Parameter	DF1B-18P-2.5DSA(01)	DF1BZ-18P-2.5DSA	Compatibility
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Match
Series	DF1B	DF1B	Match
Connector Type	Header	Header	Match
Number of Positions	18	18	Match
Pitch - Mating	0.098" (2.50mm)	0.098" (2.50mm)	Match
Mounting Type	Through Hole	Through Hole	Match
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Match
Fastening Type	Push-Pull	Push-Pull	Match
Termination	Solder	Solder	Match
Contact Length - Mating	0.177" (4.50mm)	0.177" (4.50mm)	Match
Contact Length - Post	0.142" (3.60mm)	0.142" (3.60mm)	Match
Overall Contact Length	0.417" (10.60mm)	0.417" (10.60mm)	Match
Insulation Height	0.374" (9.50mm)	0.374" (9.50mm)	Match
Contact Shape	Square	Square	Match
Contact Material	Brass	Brass	Match
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Match
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	Match
Voltage Rating	250V	250V	Match
Mated Stacking Heights	14mm	14mm	Match
Material Flammability Rating	UL94 V-0	UL94 V-0	Match
Insulation Color	White	White	Match
RoHS Status	RoHS Compliant	RoHS Compliant	Match
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Match
Contact Finish - Mating	Gold (8.00µin / 0.203µm)	Tin (39.4µin / 1.00µm)	Difference
Contact Finish - Post	Not specified	Tin	Difference
Product Status	Last Time Buy	Active	Difference

Engineering Selection Recommendations

The DF1BZ-18P-2.5DSA is the direct substitute for the DF1B-18P-2.5DSA(01). Both parts maintain identical mechanical and electrical specifications, including connector geometry, pitch, position count, voltage rating, temperature range, and compliance certifications.

The primary difference is contact finish: the original part features gold plating (8.00µin thickness) on mating contacts, while the substitute uses tin plating (39.4µin thickness). Both finishes provide adequate corrosion resistance and electrical conductivity for the specified 250V, -35°C ~ 85°C operating envelope.

The DF1BZ-18P-2.5DSA carries Active product status, ensuring continued availability and supply chain stability compared to the Last Time Buy status of the original part. This substitution is suitable for new designs and production transitions requiring the DF1B series 18-position 2.5mm pitch rectangular connector header.

Frequently Asked Questions (FAQ)

Q: Can the DF1BZ-18P-2.5DSA be used as a direct replacement for the DF1B-18P-2.5DSA(01)?

A: Yes. Both parts are mechanically and electrically identical in all critical parameters including position count, pitch, mounting type, voltage rating, and operating temperature range. The contact finish difference (gold versus tin) does not affect functional compatibility within the specified electrical and environmental operating conditions.

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

A: The original part uses gold plating for enhanced corrosion resistance in demanding environments. The substitute uses tin plating with greater thickness, which provides equivalent corrosion protection and electrical performance for standard industrial applications. Selection between these finishes depends on specific application requirements and environmental exposure.

Q: Are both parts RoHS compliant?

A: Yes. Both the DF1B-18P-2.5DSA(01) and DF1BZ-18P-2.5DSA are RoHS compliant and carry UL94 V-0 flammability ratings, meeting current regulatory requirements for electronic component applications.

Q: What does Last Time Buy status mean for the original part?

A: Last Time Buy indicates that the DF1B-18P-2.5DSA(01) is no longer in active production and existing inventory represents the final availability window. The DF1BZ-18P-2.5DSA, with Active status, ensures long-term supply continuity for applications requiring this connector type.

Q: Are the physical dimensions and mounting footprints identical?

A: Yes. Both parts share identical through-hole mounting configuration, insulation height (0.374"), overall contact length (0.417"), and mated stacking height (14mm), ensuring direct PCB footprint compatibility.

Q: What is the Moisture Sensitivity Level (MSL) for these connectors?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or assembly processes.

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