DF1B-40DP-2.5DS Equivalent & Substitute Parts

Part Overview

The DF1B-40DP-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 40 positions across 2 rows with 0.098" (2.50mm) pitch spacing and 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 repair applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-40DP-2.5DS
Manufacturer	Hirose Electric Co Ltd
Series	DF1B
Connector Type	Header
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, Right Angle
Contact Type	Male Pin
Shrouding	Shrouded - 4 Wall
Fastening Type	Push-Pull
Voltage Rating	250V
Operating Temperature	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the DF1B-40DP-2.5DS is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

Connector type: Header
Number of positions: 40
Number of rows: 2
Pitch spacing: 0.098" (2.50mm)
Row spacing: 0.098" (2.50mm)
Mounting type: Through hole, right angle
Contact type: Male pin
Shrouding: Shrouded - 4 wall
Fastening type: Push-pull
Insulation material: Polyamide (PA), Nylon
Material flammability rating: UL94 V-0
Operating temperature range: -35°C ~ 85°C
Moisture sensitivity level: 1 (Unlimited)

The identified substitute parts maintain these core parameters while differing in product status (active vs. obsolete), RoHS compliance status, and specific contact finish specifications. These differences do not affect mechanical or electrical interchangeability in applications where the original part was specified.

Parameter Comparison

Parameter	DF1B-40DP-2.5DS (Main)	DF1BZ-40DP-2.5DS (Substitute)	DF1B-40DP-2.5DS(01) (Substitute)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	DF1B	DF1B	DF1B
Connector Type	Header	Header	Header
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, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Contact Type	Male Pin	Male Pin	Male Pin
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
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	150V	250V
Product Status	Obsolete	Active	Active
RoHS Status	RoHS non-compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

DF1BZ-40DP-2.5DS is an active equivalent offering RoHS compliance and identical mechanical specifications. This part is suitable for applications where the 150V voltage rating is sufficient. The lower voltage rating represents the primary electrical distinction from the original part.

DF1B-40DP-2.5DS(01) is the manufacturer-recommended substitute, maintaining the original 250V voltage rating while providing RoHS compliance and active product status. This part features gold contact finish on the mating surface, differing from the tin finish of the original part. The gold finish provides enhanced corrosion resistance and contact reliability.

Both substitute parts are manufactured by Hirose Electric Co Ltd within the DF1B series and maintain full mechanical and dimensional compatibility with the obsolete original part. Selection between substitutes depends on voltage requirement specifications and contact finish performance requirements for the intended application.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-40DP-2.5DS be used as a direct replacement for DF1B-40DP-2.5DS?

A: DF1BZ-40DP-2.5DS maintains identical mechanical dimensions, pitch spacing, mounting configuration, and contact geometry. The primary difference is the reduced voltage rating of 150V versus the original 250V. Substitution is valid for applications operating at or below 150V.

Q: What is the difference between DF1B-40DP-2.5DS(01) and the original part?

A: DF1B-40DP-2.5DS(01) maintains the original 250V voltage rating and mechanical specifications. The contact finish differs: the substitute uses gold plating on mating contacts versus tin on the original part. Both parts are electrically and mechanically interchangeable.

Q: Why does DF1BZ-40DP-2.5DS have a lower voltage rating?

A: The voltage rating difference reflects design specifications within the DF1B series variants. Both parts maintain identical physical dimensions and contact spacing. Voltage rating selection should be based on application requirements.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both DF1BZ-40DP-2.5DS and DF1B-40DP-2.5DS(01) are RoHS compliant, whereas the original DF1B-40DP-2.5DS is RoHS non-compliant.

Q: What is the packaging difference between substitute parts?

A: Both substitute parts are supplied in bulk packaging, whereas the original part packaging specification was not provided in the technical data.

Q: Do the substitute parts maintain the same operating temperature range?

A: Yes. All three parts operate across the identical temperature range of -35°C to 85°C.

Q: Are the contact materials identical across all three parts?

A: Yes. All parts use brass contact material with tin or gold plating finishes as specified.

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