MDF7B-8P-2.54DSA(55) Equivalent & Substitute Parts

Part Overview

The MDF7B-8P-2.54DSA(55) is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole mounting with 8 positions at 0.100" (2.54mm) pitch. This connector features male pins, unshrouded design, and push-pull fastening for board-to-board applications. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	MDF7B-8P-2.54DSA(55)
Manufacturer	Hirose Electric Co Ltd
Series	MDF7
Number of Positions	8
Pitch - Mating	0.100" (2.54mm)
Connector Type	Header
Contact Type	Male Pin
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A
Voltage Rating	250V
Operating Temperature	-35°C ~ 85°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MDF7B-8P-2.54DSA(55) is determined by the following critical parameters:

Connector Series: MDF7 (Hirose Electric Co Ltd)
Number of Positions: 8
Pitch - Mating: 0.100" (2.54mm)
Contact Type: Male Pin
Mounting Type: Through Hole
Termination: Solder
Current Rating: 3A minimum
Voltage Rating: 250V minimum
Operating Temperature Range: -35°C ~ 85°C
Material Flammability Rating: UL94 V-0
RoHS Status: RoHS Compliant

The MDF7B-8P-2.54DSA(95) qualifies as a direct substitute based on matching all critical electrical and mechanical parameters within the MDF7 series. Both parts maintain identical pitch, position count, contact configuration, and electrical ratings. The primary distinction lies in application style (board-to-board versus board-to-cable/wire) and product status (obsolete versus active).

Parameter Comparison

Parameter	MDF7B-8P-2.54DSA(55)	MDF7B-8P-2.54DSA(95)
Manufacturer Part Number	MDF7B-8P-2.54DSA(55)	MDF7B-8P-2.54DSA(95)
Series	MDF7	MDF7
Number of Positions	8	8
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Connector Type	Header	Header
Contact Type	Male Pin	Male Pin
Number of Rows	1	1
Shrouding	Unshrouded	Unshrouded
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Length - Mating	0.648" (16.47mm)	0.648" (16.47mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)
Overall Contact Length	0.867" (22.01mm)	0.866" (22.00mm)
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)
Contact Shape	Square	Square
Contact Finish - Mating	Tin	Tin
Contact Finish - Post	Tin	Tin
Contact Material	Brass	Brass
Insulation Material	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Insulation Color	Black	Black
Current Rating	3A	3A
Voltage Rating	250V	250VAC
RoHS Status	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040
Product Status	Obsolete	Active
Style	Board to Board	Board to Cable/Wire

Engineering Selection Recommendations

The MDF7B-8P-2.54DSA(95) is the qualified substitute for the obsolete MDF7B-8P-2.54DSA(55). Both parts maintain identical electrical specifications, mechanical dimensions, and compliance certifications. The MDF7B-8P-2.54DSA(95) is currently in active production status with confirmed inventory availability, providing supply continuity for applications previously using the MDF7B-8P-2.54DSA(55).

The primary design consideration is the application style difference: the original part is specified for board-to-board connectivity, while the substitute is designated for board-to-cable/wire applications. This distinction reflects the connector's intended mating interface but does not affect the header's electrical or mechanical performance characteristics. Overall contact length variance (0.867" versus 0.866") is within manufacturing tolerance and does not impact functional compatibility.

Both parts carry identical RoHS compliance, flammability ratings, and regulatory classifications, supporting direct substitution in existing designs without additional qualification requirements.

Frequently Asked Questions (FAQ)

Q: Can the MDF7B-8P-2.54DSA(95) directly replace the MDF7B-8P-2.54DSA(55) in existing PCB designs?

A: Yes. Both connectors share identical pitch (0.100" / 2.54mm), position count (8), contact configuration (male pin), mounting type (through hole), and electrical ratings (3A, 250V). The through-hole footprint and solder termination are functionally equivalent.

Q: What is the significance of the application style difference (board-to-board versus board-to-cable/wire)?

A: The application style designation indicates the intended mating connector type. The MDF7B-8P-2.54DSA(55) is designed to mate with a receptacle header, while the MDF7B-8P-2.54DSA(95) is designed to mate with a cable connector. From a PCB assembly perspective, both headers are identical and mount identically to the board.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts carry identical RoHS compliance status, UL94 V-0 flammability rating, ECCN classification (EAR99), and HTSUS codes. Regulatory and environmental compliance is equivalent.

Q: What is the inventory status for the substitute part?

A: The MDF7B-8P-2.54DSA(95) is listed as active product status with 624 pieces in stock. The original MDF7B-8P-2.54DSA(55) is obsolete with 850 pieces remaining in inventory.

Q: Is the 0.001" (0.01mm) difference in overall contact length significant?

A: No. This variance falls within standard manufacturing tolerances for connector components and does not affect mechanical fit, electrical performance, or functional compatibility.

Q: What packaging format is available for the substitute part?

A: The MDF7B-8P-2.54DSA(95) is supplied in bag packaging, suitable for standard component handling and assembly processes.

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