MDF7-10S-2.54DSA Equivalent & Substitute Parts

Part Overview

The MDF7-10S-2.54DSA is a 10-position rectangular receptacle connector manufactured by Hirose Electric Co., Ltd., designed for board-to-board applications with 0.100" (2.54mm) pitch through-hole mounting. This connector features female socket contacts with tin plating, solder termination, and push-pull fastening. The part is currently listed as obsolete, which necessitates identification of functionally equivalent alternatives to maintain design continuity and ensure component availability for production and repair applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	MDF7-10S-2.54DSA
Manufacturer	Hirose Electric Co., Ltd.
Category	Rectangular Connectors
Connector Type	Receptacle, Bottom Entry
Number of Positions	10
Pitch - Mating	0.100" (2.54mm)
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 MDF7-10S-2.54DSA is determined by strict equivalence across the following critical parameters:

Connector type: Receptacle, bottom entry configuration
Number of positions: 10 positions
Pitch specification: 0.100" (2.54mm) mating pitch
Contact type: Female socket
Mounting method: Through hole solder termination
Electrical ratings: 3A current, 250VAC voltage
Operating temperature range: -35°C ~ 85°C
Fastening type: Push-pull mechanism
Insulation material: Polyamide (PA), Nylon
Contact material: Phosphor bronze

The identified substitute maintains all critical electrical, mechanical, and environmental parameters required for direct functional replacement.

Parameter Comparison

Parameter	MDF7-10S-2.54DSA	MDF7-10S-2.54DSA(55)
Manufacturer Part Number	MDF7-10S-2.54DSA	MDF7-10S-2.54DSA(55)
Manufacturer	Hirose Electric Co., Ltd.	Hirose Electric Co Ltd
Series	MDF7	MDF7
Connector Type	Receptacle, Bottom Entry	Receptacle, Bottom Entry
Number of Positions	10	10
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Contact Type	Female Socket	Female Socket
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Contact Finish - Mating	Tin	Tin
Contact Finish Thickness - Mating	39.4µin (1.00µm)	78.7µin (2.00µm)
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)
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Current Rating (Amps)	3A	3A
Voltage Rating	250VAC	250VAC
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Contact Shape	Square	Square
Contact Material	Phosphor Bronze	Phosphor Bronze
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

The MDF7-10S-2.54DSA(55) is a direct functional equivalent suitable for replacement of the obsolete MDF7-10S-2.54DSA. Both parts share identical mechanical and electrical specifications across all critical parameters including connector configuration, position count, pitch, contact ratings, and operating temperature range.

The primary distinction between the two parts is product status and regulatory compliance. The MDF7-10S-2.54DSA(55) is currently in active production status, ensuring ongoing availability and supply chain continuity. Additionally, the MDF7-10S-2.54DSA(55) carries ROHS3 compliance certification, whereas the original part is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the MDF7-10S-2.54DSA(55) provides the necessary compliance framework.

A secondary difference exists in contact finish thickness on the mating surface, where the substitute part specifies 78.7µin (2.00µm) compared to 39.4µin (1.00µm) on the original part. This increased thickness provides enhanced durability and contact reliability without affecting electrical or mechanical compatibility.

Frequently Asked Questions (FAQ)

Q: Are the MDF7-10S-2.54DSA and MDF7-10S-2.54DSA(55) mechanically interchangeable?

A: Yes. Both parts are identical in mechanical configuration, including connector type, position count, pitch spacing, mounting method, and physical dimensions. Direct substitution is possible without PCB redesign or mechanical modification.

Q: What is the significance of the "(55)" designation in the part number?

A: The "(55)" suffix indicates a packaging or production variant. In this case, it denotes bulk packaging and represents an active production variant of the same connector series with improved regulatory compliance.

Q: Does the difference in contact finish thickness affect performance?

A: No. The increased tin plating thickness on the MDF7-10S-2.54DSA(55) (78.7µin versus 39.4µin) maintains full electrical compatibility while providing enhanced contact durability and extended service life. This change does not alter electrical characteristics or mating force specifications.

Q: Can the MDF7-10S-2.54DSA(55) be used in applications originally designed for the MDF7-10S-2.54DSA?

A: Yes. The substitute part maintains all critical electrical ratings (3A, 250VAC), operating temperature range (-35°C ~ 85°C), and mechanical specifications. For applications requiring RoHS compliance, the MDF7-10S-2.54DSA(55) is the appropriate selection.

Q: What is the inventory status of these parts?

A: The original MDF7-10S-2.54DSA is obsolete with limited remaining stock (835 pcs). The MDF7-10S-2.54DSA(55) is in active production with substantially higher availability (5998 pcs), ensuring reliable supply for new designs and production requirements.

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