MDF7-3S-2.54DSA Rectangular Connector - Equivalent & Substitute Parts

Part Overview

The MDF7-3S-2.54DSA(36) is a 3-position 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, solder termination, and push-pull fastening. The part is currently listed as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Bottom Entry
Contact Type	Female Socket
Number of Positions	3
Pitch - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Current Rating	3A
Voltage Rating	250VAC
Operating Temperature	-35°C ~ 85°C
Insulation Material	Polyamide (PA), Nylon
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the MDF7-3S-2.54DSA(36) is determined by the following critical parameters:

Connector Type & Contact Configuration: Receptacle, bottom entry with female socket contacts
Position Count & Pitch: 3 positions at 0.100" (2.54mm) mating pitch
Mounting & Termination: Through-hole PCB mounting with solder termination
Electrical Ratings: 3A current capacity and 250VAC voltage rating
Environmental Specifications: Operating temperature range of -35°C to 85°C and UL94 V-0 flammability rating
Material Composition: Polyamide (PA) nylon insulation with phosphor bronze contacts

The MDF7-3S-2.54DSA(40) meets all these criteria and qualifies as a direct substitute.

Parameter Comparison

Parameter	MDF7-3S-2.54DSA(36) - Main Part	MDF7-3S-2.54DSA(40) - Substitute
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	MDF7	MDF7
Product Status	Obsolete	Active
Connector Type	Receptacle, Bottom Entry	Receptacle, Bottom Entry
Contact Type	Female Socket	Female Socket
Number of Positions	3	3
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
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
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

The MDF7-3S-2.54DSA(40) is the appropriate substitute for the obsolete MDF7-3S-2.54DSA(36). Both connectors are manufactured by Hirose Electric Co Ltd within the same MDF7 series and share identical electrical, mechanical, and environmental specifications.

The primary distinction is product status: the MDF7-3S-2.54DSA(36) is obsolete, while the MDF7-3S-2.54DSA(40) maintains active production status. The substitute part additionally carries RoHS compliance certification and improved moisture sensitivity level (MSL 1 - Unlimited) compared to the main part's not applicable rating, providing enhanced environmental protection and regulatory alignment for new designs and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can the MDF7-3S-2.54DSA(40) be used as a direct replacement for the MDF7-3S-2.54DSA(36)?

A: Yes. Both connectors share identical connector type, contact configuration, position count, mating pitch, mounting method, termination type, and electrical ratings. They are mechanically and electrically interchangeable.

Q: What is the primary reason for substitution?

A: The MDF7-3S-2.54DSA(36) is obsolete. The MDF7-3S-2.54DSA(40) is an active production part from the same manufacturer and series, ensuring continued availability and supply chain reliability.

Q: Are there any compliance differences between the two parts?

A: The MDF7-3S-2.54DSA(40) carries RoHS compliance certification and specifies MSL 1 (Unlimited) moisture sensitivity, whereas the main part lists these as not applicable. These certifications enhance regulatory compliance for applications subject to environmental and hazardous substance restrictions.

Q: Will PCB layout or assembly procedures require modification?

A: No. Identical mechanical dimensions, pitch spacing, insulation height, contact post length, and through-hole mounting specifications ensure direct compatibility without PCB redesign or assembly process changes.

Q: Are the electrical performance characteristics identical?

A: Yes. Both parts maintain 3A current rating, 250VAC voltage rating, -35°C to 85°C operating temperature range, and UL94 V-0 flammability rating.

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