MDF7B-22P-2.54DSA(55) Equivalent & Substitute Parts

Part Overview

The MDF7B-22P-2.54DSA(55) is a rectangular connector header manufactured by Hirose Electric Co., Ltd., designed for through-hole mounting applications. This connector features 22 vertical positions with 0.100" (2.54mm) pitch spacing and male pin contacts. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	MDF7B-22P-2.54DSA(55)
Manufacturer	Hirose Electric Co., Ltd.
Series	MDF7
Connector Type	Header
Contact Type	Male Pin
Number of Positions	22
Pitch - Mating	0.100" (2.54mm)
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-22P-2.54DSA(55) is determined by the following critical parameters:

Series Compatibility: Both parts must belong to the MDF7 series
Position Count: 22 positions required
Pitch Specification: 0.100" (2.54mm) mating pitch
Contact Configuration: Male pin contacts
Mounting Method: Through-hole mounting
Termination Type: Solder termination
Electrical Ratings: 3A current rating and 250V voltage rating
Material Specifications: Brass contacts with tin finish; PBT insulation
Environmental Compliance: UL94 V-0 flammability rating; RoHS compliant

The MDF7B-22P-2.54DSA(95) qualifies as a direct substitute based on matching all critical electrical, mechanical, and material parameters within the MDF7 series.

Parameter Comparison

Parameter	MDF7B-22P-2.54DSA(55)	MDF7B-22P-2.54DSA(95)	Match Status
Series	MDF7	MDF7	Identical
Number of Positions	22	22	Identical
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	Identical
Connector Type	Header	Header	Identical
Contact Type	Male Pin	Male Pin	Identical
Mounting Type	Through Hole	Through Hole	Identical
Termination	Solder	Solder	Identical
Contact Length - Mating	0.648" (16.47mm)	0.648" (16.47mm)	Identical
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	Identical
Overall Contact Length	0.867" (22.01mm)	0.866" (22.00mm)	Equivalent
Insulation Height	0.100" (2.54mm)	0.100" (2.54mm)	Identical
Contact Shape	Square	Square	Identical
Contact Finish - Mating	Tin	Tin	Identical
Contact Finish - Post	Tin	Tin	Identical
Contact Material	Brass	Brass	Identical
Insulation Material	Polybutylene Terephthalate (PBT)	Polybutylene Terephthalate (PBT)	Identical
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	Identical
Material Flammability Rating	UL94 V-0	UL94 V-0	Identical
Insulation Color	Black	Black	Identical
Current Rating	3A	3A	Identical
Voltage Rating	250V	250VAC	Equivalent
RoHS Status	RoHS Compliant	RoHS Compliant	Identical
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Identical
Product Status	Obsolete	Active	Different

Engineering Selection Recommendations

The MDF7B-22P-2.54DSA(95) is the qualified substitute for the obsolete MDF7B-22P-2.54DSA(55). Selection is based on the following engineering criteria:

Compliance and Certification: Both parts maintain identical RoHS compliance status and UL94 V-0 flammability ratings, ensuring regulatory requirements are met in replacement applications.

Electrical and Mechanical Equivalence: All critical electrical parameters (3A current rating, 250V voltage rating) and mechanical specifications (22 positions, 2.54mm pitch, through-hole mounting, solder termination) are identical between the two parts.

Product Status Consideration: The substitute part MDF7B-22P-2.54DSA(95) carries active product status, providing ongoing availability and manufacturing support compared to the obsolete original part.

Physical Compatibility: Overall contact length differs by 0.01" (0.01mm), which is within manufacturing tolerance and does not affect functional compatibility in standard through-hole PCB applications.

Frequently Asked Questions (FAQ)

Q: Can MDF7B-22P-2.54DSA(95) be used as a direct replacement for MDF7B-22P-2.54DSA(55)?

A: Yes. Both parts share identical electrical ratings (3A, 250V), mechanical configuration (22 positions, 2.54mm pitch), contact materials (brass with tin finish), and insulation specifications (PBT, UL94 V-0). The substitute maintains active product status while the original is obsolete.

Q: What is the difference between the two part numbers?

A: The suffix designation differs: (55) versus (95). Both parts belong to the MDF7 series and share identical core specifications. The (95) variant is the current active production version.

Q: Are there packaging differences between these parts?

A: The original part MDF7B-22P-2.54DSA(55) has unspecified packaging, while the substitute MDF7B-22P-2.54DSA(95) is supplied in bag packaging. This does not affect electrical or mechanical performance.

Q: Do both parts meet RoHS compliance requirements?

A: Yes. Both MDF7B-22P-2.54DSA(55) and MDF7B-22P-2.54DSA(95) are RoHS compliant with identical moisture sensitivity level (MSL 1, Unlimited).

Q: What is the operating temperature range for these connectors?

A: Both parts operate across the identical temperature range of -35°C to 85°C, suitable for standard industrial and commercial applications.

Q: Are the contact dimensions identical between the two parts?

A: Contact mating length (0.648" / 16.47mm) and post length (0.118" / 3.00mm) are identical. Overall contact length differs by 0.01" (0.01mm), which is within standard manufacturing tolerance and does not affect PCB mounting or mating performance.

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