DF1B-4P-2.5DS Equivalent & Substitute Parts

Part Overview

The DF1B-4P-2.5DS is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole, right-angle board-to-cable/wire applications with 4 positions at 2.5mm pitch. This part is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	DF1B-4P-2.5DS
Manufacturer	Hirose Electric Co Ltd
Category	Rectangular Connectors
Series	DF1B
Product Status	Obsolete
Connector Type	Header
Contact Type	Male Pin
Pitch - Mating	0.098" (2.50mm)
Number of Positions	4
Number of Rows	1
Mounting Type	Through Hole, Right Angle
Termination	Solder
Fastening Type	Push-Pull
Shrouding	Shrouded - 4 Wall
Operating Temperature	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0
Voltage Rating	250V
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DF1B-4P-2.5DS is determined by the following critical parameters:

Primary Substitution Criteria:

Connector type (Header)
Contact type (Male Pin)
Number of positions (4)
Mounting type (Through Hole, Right Angle)
Termination method (Solder)
Shrouding configuration (Shrouded - 4 Wall)
Pitch compatibility (2.5mm or 2.54mm)

Substitutes are grouped into two categories:

Direct Hirose Series Equivalents - Parts maintaining identical pitch (2.5mm), shrouding, and fastening characteristics within the DF1B family
Cross-Manufacturer Alternatives - Parts from TE Connectivity and On Shore Technology with compatible pitch (2.54mm), shrouding, and electrical ratings

The DF1BZ-4P-2.5DS and DF1B-4P-2.5DS(01) maintain the 2.5mm pitch specification. The 102203-1 and 2600-04-R operate at 2.54mm pitch, introducing minor dimensional variance that requires mechanical validation in the application.

Parameter Comparison

Parameter	DF1B-4P-2.5DS	DF1BZ-4P-2.5DS	DF1B-4P-2.5DS(01)	102203-1	2600-04-R
Manufacturer	Hirose	Hirose	Hirose	TE Connectivity	On Shore Technology
Product Status	Obsolete	Active	Active	Active	Active
Pitch - Mating	0.098" (2.50mm)	0.098" (2.50mm)	0.098" (2.50mm)	0.100" (2.54mm)	0.100" (2.54mm)
Number of Positions	4	4	4	4	4
Connector Type	Header	Header	Header	Header	Header
Contact Type	Male Pin	Male Pin	Male Pin	Male Pin	Male Pin
Mounting Type	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle	Through Hole, Right Angle
Termination	Solder	Solder	Solder	Solder	Solder
Shrouding	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 4 Wall	Shrouded - 1 Wall
Contact Finish - Mating	Tin	Tin	Gold	Gold	Tin
Contact Material	Brass	Brass	Brass	Phosphor Bronze	Brass
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	-35°C ~ 85°C	-65°C ~ 105°C	-55°C ~ 105°C
Voltage Rating	250V	150V	250V	Not specified	250V
Material Flammability Rating	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	Not applicable	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Fastening Type	Push-Pull	Push-Pull	Push-Pull	Push-Pull	Friction Lock
Inventory Status	865 Pcs	4100 Pcs	30596 Pcs	976 Pcs	819 Pcs

Engineering Selection Recommendations

DF1BZ-4P-2.5DS - Direct Hirose equivalent with identical 2.5mm pitch and mechanical configuration. Active product status with ROHS3 compliance. Primary consideration: voltage rating reduced to 150V compared to original 250V specification. Suitable for applications not requiring the full 250V rating.

DF1B-4P-2.5DS(01) - Manufacturer-recommended direct replacement from Hirose. Maintains 2.5mm pitch, 250V voltage rating, and all mechanical specifications. Differs in contact finish (gold vs. tin) and achieves ROHS3 compliance. Highest inventory availability (30,596 pcs). Recommended as primary substitute for direct compatibility.

102203-1 - TE Connectivity AMPMODU Mod II series alternative. Operates at 2.54mm pitch (0.100") versus original 2.5mm specification. Offers extended operating temperature range (-65°C to 105°C) and higher current rating (3A). Shrouding configuration identical (4 Wall). Requires mechanical validation due to pitch variance. Gold contact finish and phosphor bronze material provide enhanced contact reliability.

2600-04-R - On Shore Technology alternative at 2.54mm pitch. Maintains 250V voltage rating and 3A current rating. Shrouding reduced to 1 Wall (versus 4 Wall original). Fastening type differs (Friction Lock versus Push-Pull). Extended operating temperature range (-55°C to 105°C). ROHS3 compliant. Requires mechanical and functional validation due to shrouding and fastening differences.

Frequently Asked Questions (FAQ)

Q: Can DF1BZ-4P-2.5DS directly replace DF1B-4P-2.5DS?

A: Mechanical and electrical compatibility is confirmed for all critical parameters. The 150V voltage rating of DF1BZ-4P-2.5DS is the primary consideration. If the application operates at or below 150V, direct substitution is valid. If 250V rating is required, use DF1B-4P-2.5DS(01) instead.

Q: What is the impact of pitch difference between 2.5mm and 2.54mm?

A: The 0.04mm pitch variance between 2.5mm (DF1B series) and 2.54mm (102203-1, 2600-04-R) affects PCB footprint spacing and mating connector compatibility. Mechanical validation is required to confirm the mating connector can accommodate the pitch variance. Direct substitution without PCB redesign is not valid.

Q: Why does DF1B-4P-2.5DS(01) have gold contact finish instead of tin?

A: Gold plating provides enhanced corrosion resistance and contact reliability compared to tin finish. This is a material upgrade that improves long-term performance and is compatible with the original application requirements.

Q: Is the 1-Wall shrouding of 2600-04-R compatible with 4-Wall shrouding applications?

A: Shrouding configuration affects mechanical keying and EMI shielding characteristics. The 1-Wall shrouding of 2600-04-R provides reduced mechanical constraint compared to the 4-Wall original. Functional validation is required to confirm compatibility with the mating connector and application requirements.

Q: What is the difference between Push-Pull and Friction Lock fastening?

A: Push-Pull fastening (DF1B series, 102203-1) uses a mechanical latch mechanism for secure mating. Friction Lock (2600-04-R) relies on contact pressure for retention. These are functionally different fastening methods requiring validation for application compatibility.

Q: Are all substitutes RoHS compliant?

A: DF1BZ-4P-2.5DS, DF1B-4P-2.5DS(01), and 2600-04-R are ROHS3 compliant. The original DF1B-4P-2.5DS is RoHS non-compliant. The 102203-1 has RoHS status listed as "Not applicable." Compliance requirements should be confirmed for your specific application.

Q: Which substitute offers the best inventory availability?

A: DF1B-4P-2.5DS(01) has the highest inventory (30,596 pcs), followed by DF1BZ-4P-2.5DS (4,100 pcs). Both are Hirose products with active status and immediate availability.

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