DF1B-40DP-2.5DSA Equivalent & Substitute Parts

Part Overview

The DF1B-40DP-2.5DSA is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting applications. This connector features 40 positions arranged in 2 rows with 0.098" (2.50mm) pitch spacing, supporting board-to-cable/wire connections with push-pull fastening. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-40DP-2.5DSA
Manufacturer	Hirose Electric Co Ltd
Category	Rectangular Connectors
Series	DF1B
Connector Type	Header
Contact Type	Male Pin
Number of Positions	40
Number of Rows	2
Pitch - Mating	0.098" (2.50mm)
Row Spacing - Mating	0.098" (2.50mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Shrouding	Shrouded - 4 Wall
Operating Temperature Range	-35°C ~ 85°C
Voltage Rating	250V
Material Flammability Rating	UL94 V-0
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-40DP-2.5DSA is determined by strict equivalence across the following critical parameters:

Connector type, contact type, and gender (Header, Male Pin)
Number of positions and row configuration (40 positions, 2 rows)
Mating pitch and row spacing (0.098" / 2.50mm)
Mounting method and termination (Through Hole, Solder)
Fastening mechanism (Push-Pull)
Shrouding configuration (Shrouded - 4 Wall)
Operating temperature range (-35°C ~ 85°C)
Voltage rating (250V)
Flammability rating (UL94 V-0)

The identified substitute parts maintain full compatibility across all these parameters. Variations in contact finish, RoHS compliance status, and packaging do not affect functional interchangeability in the connector interface.

Parameter Comparison

Parameter	DF1B-40DP-2.5DSA (Main)	DF1BZ-40DP-2.5DSA	DF1B-40DP-2.5DSA(01)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	DF1B	DF1B	DF1B
Connector Type	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin
Number of Positions	40	40	40
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
Termination	Solder	Solder	Solder
Fastening Type	Push-Pull	Push-Pull	Push-Pull
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall
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
Features	Keying Slot	Keying Slot	Keying Slot
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
Insulation Color	White	White	White
Voltage Rating	250V	250V	250V
Mated Stacking Heights	14mm	14mm	14mm
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

Both substitute parts provide full functional equivalence to the obsolete DF1B-40DP-2.5DSA across all critical electrical and mechanical parameters.

DF1BZ-40DP-2.5DSA is an active product with ROHS3 compliance and tin contact finish, maintaining identical mating characteristics to the original part. This option is suitable for applications requiring current RoHS3 certification status.

DF1B-40DP-2.5DSA(01) is the manufacturer-recommended substitute, classified as active with RoHS compliance and gold contact finish. The gold plating on mating contacts (8.00µin / 0.203µm thickness) provides enhanced corrosion resistance compared to tin finish. This variant is designated as the primary replacement for obsolete inventory management and new design implementations.

Both substitutes are available in bulk packaging and maintain the same 250V voltage rating, UL94 V-0 flammability rating, and -35°C to 85°C operating temperature range as the original part.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-40DP-2.5DSA and DF1B-40DP-2.5DSA(01) be used interchangeably with the original DF1B-40DP-2.5DSA?

A: Both parts are electrically and mechanically equivalent. They share identical connector geometry, pitch spacing, contact configuration, and electrical ratings. The primary differences are product status (both active versus obsolete), RoHS compliance levels, and contact finish material. Selection depends on compliance requirements and environmental exposure considerations.

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

A: The DF1BZ-40DP-2.5DSA uses tin contact finish on mating surfaces, while DF1B-40DP-2.5DSA(01) uses gold plating (8.00µin thickness). Gold provides superior corrosion resistance and is preferred for applications with extended shelf life, high-humidity environments, or critical reliability requirements. Tin finish is suitable for standard industrial applications with normal environmental conditions.

Q: Are there packaging differences between the substitute parts?

A: DF1BZ-40DP-2.5DSA is supplied in bulk packaging, while DF1B-40DP-2.5DSA(01) is also supplied in bulk packaging. Both are available in quantities suitable for production assembly.

Q: Which substitute should be selected for new designs?

A: DF1B-40DP-2.5DSA(01) is the manufacturer-recommended replacement and is designated as the primary choice for new design implementations. It provides RoHS compliance, enhanced contact durability through gold plating, and active product status with established supply chain support.

Q: Do these connectors maintain the same mating height and stacking characteristics?

A: All three parts maintain identical mated stacking heights of 14mm and identical contact dimensions. They are fully compatible with existing mating connectors and PCB layouts designed for the original DF1B-40DP-2.5DSA.

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