MDF7-22D-2.54DSA(55) Equivalent & Substitute Parts

Part Overview

The MDF7-22D-2.54DSA(55) is a 22-position rectangular receptacle connector manufactured by Hirose Electric Co Ltd, designed for board-to-board applications with 0.100" (2.54mm) pitch spacing. This connector features bottom entry configuration, through-hole solder termination, and push-pull fastening. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing maintenance, repair, and legacy system support.

Key Parameters

Parameter	Value
Manufacturer Part Number	MDF7-22D-2.54DSA(55)
Manufacturer	Hirose Electric Co Ltd
Series	MDF7
Number of Positions	22
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Connector Type	Receptacle, Bottom Entry
Contact Type	Female Socket
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A
Voltage Rating	250VAC
Operating Temperature	-35°C ~ 85°C
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the MDF7-22D-2.54DSA(55) is determined by strict equivalence across the following critical parameters:

Connector Configuration: Receptacle, bottom entry, board-to-board style
Contact Arrangement: 22 positions, 2 rows, 0.100" (2.54mm) pitch and row spacing
Electrical Specifications: 3A current rating, 250VAC voltage rating
Mechanical Interface: Through-hole solder termination, push-pull fastening
Environmental Compliance: UL94 V-0 flammability rating, -35°C ~ 85°C operating temperature range
Contact Materials: Phosphor bronze with tin finish, square contact shape

The substitute part MDF7-22D-2.54DSA(95) maintains identical mechanical and electrical specifications while differing only in contact finish thickness and product status classification.

Parameter Comparison

Parameter	MDF7-22D-2.54DSA(55)	MDF7-22D-2.54DSA(95)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	MDF7	MDF7
Number of Positions	22	22
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	2	2
Row Spacing - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Connector Type	Receptacle, Bottom Entry	Receptacle, Bottom Entry
Contact Type	Female Socket	Female Socket
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Current Rating	3A	3A
Voltage Rating	250VAC	250VAC
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Contact Finish - Mating	Tin	Tin
Contact Finish Thickness - Mating	78.7µin (2.00µm)	39.4µin (1.00µm)
Insulation Color	Black	Black
Insulation Height	0.197" (5.00mm)	0.197" (5.00mm)
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)
Contact Material	Phosphor Bronze	Phosphor Bronze
Contact Shape	Square	Square
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active
RoHS Status	Not specified	RoHS Compliant

Engineering Selection Recommendations

The MDF7-22D-2.54DSA(95) is the direct substitute for the obsolete MDF7-22D-2.54DSA(55). Both connectors share identical mechanical and electrical specifications, ensuring functional compatibility in board-to-board applications requiring 22-position, 0.100" pitch rectangular receptacle connectors.

The primary distinction between these parts is product status: the MDF7-22D-2.54DSA(55) is obsolete, while the MDF7-22D-2.54DSA(95) is active and carries RoHS compliance certification. The MDF7-22D-2.54DSA(95) also features a reduced contact finish thickness on mating surfaces (39.4µin versus 78.7µin), which does not affect electrical or mechanical performance within the specified operating parameters.

For new designs and ongoing production requiring this connector configuration, the MDF7-22D-2.54DSA(95) is the appropriate selection. For legacy system maintenance where the original MDF7-22D-2.54DSA(55) is specified, the MDF7-22D-2.54DSA(95) provides direct functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can MDF7-22D-2.54DSA(95) be used as a direct replacement for MDF7-22D-2.54DSA(55)?

A: Yes. Both connectors maintain identical specifications for number of positions, pitch spacing, row configuration, current and voltage ratings, operating temperature range, and mechanical interface. The parts are functionally equivalent for board-to-board applications.

Q: What is the difference between the contact finish thickness specifications?

A: The MDF7-22D-2.54DSA(55) specifies 78.7µin (2.00µm) tin finish thickness on mating contacts, while the MDF7-22D-2.54DSA(95) specifies 39.4µin (1.00µm). Both thicknesses meet the electrical and mechanical requirements for 3A current and 250VAC voltage applications within the -35°C ~ 85°C operating range.

Q: Why is the MDF7-22D-2.54DSA(55) listed as obsolete?

A: Product obsolescence is determined by manufacturer discontinuation. The MDF7-22D-2.54DSA(95) remains in active production and is the current equivalent offering from Hirose Electric Co Ltd for this connector configuration.

Q: Does the MDF7-22D-2.54DSA(95) meet RoHS requirements?

A: Yes. The MDF7-22D-2.54DSA(95) is RoHS compliant. RoHS compliance status is not specified for the obsolete MDF7-22D-2.54DSA(55).

Q: Are there packaging differences between these parts?

A: The MDF7-22D-2.54DSA(55) packaging is not specified. The MDF7-22D-2.54DSA(95) is supplied in bulk packaging.

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