MDF7-3S-2.54DSA(34) Equivalent & Substitute Parts

Part Overview

The MDF7-3S-2.54DSA(34) 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 with gold plating on mating surfaces, rated for 3A at 250VAC, and operates across -35°C to 85°C. The part is currently obsolete, necessitating identification of active equivalent models to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility for the MDF7-3S-2.54DSA(34) is determined by the following critical parameters:

Connector Type & Style: Receptacle, Bottom Entry, Board to Board configuration
Position Count & Pitch: 3 positions at 0.100" (2.54mm) mating pitch
Electrical Ratings: 3A current capacity and 250VAC voltage rating
Mounting & Termination: Through-hole solder termination
Environmental Compliance: UL94 V-0 flammability rating and operating temperature range of -35°C to 85°C
Contact Configuration: Female socket contacts with phosphor bronze material and square contact shape

The MDF7-3S-2.54DSA(38) meets all substitution criteria as an active product within the same MDF7 series, maintaining identical mechanical and electrical specifications while offering improved product status and compliance documentation.

Parameter Comparison

Parameter	MDF7-3S-2.54DSA(34)	MDF7-3S-2.54DSA(38)	Match Status
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd	Identical
Series	MDF7	MDF7	Identical
Connector Type	Receptacle, Bottom Entry	Receptacle, Bottom Entry	Identical
Number of Positions	3	3	Identical
Pitch - Mating	0.100" (2.54mm)	0.100" (2.54mm)	Identical
Mounting Type	Through Hole	Through Hole	Identical
Contact Type	Female Socket	Female Socket	Identical
Termination	Solder	Solder	Identical
Fastening Type	Push-Pull	Push-Pull	Identical
Insulation Color	Black	Black	Identical
Insulation Height	0.197" (5.00mm)	0.197" (5.00mm)	Identical
Contact Length - Post	0.118" (3.00mm)	0.118" (3.00mm)	Identical
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C	Identical
Material Flammability Rating	UL94 V-0	UL94 V-0	Identical
Current Rating (Amps)	3A	3A	Identical
Voltage Rating	250VAC	250VAC	Identical
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon	Identical
Contact Shape	Square	Square	Identical
Contact Material	Phosphor Bronze	Phosphor Bronze	Identical
Product Status	Obsolete	Active	Substitute is Active
RoHS Status	Not specified	RoHS Compliant	Substitute has RoHS Compliance
Moisture Sensitivity Level (MSL)	Not Applicable	1 (Unlimited)	Substitute has defined MSL

Engineering Selection Recommendations

The MDF7-3S-2.54DSA(38) is the direct substitute for the obsolete MDF7-3S-2.54DSA(34). Both connectors maintain identical mechanical and electrical specifications across all critical parameters including connector type, position count, pitch, current and voltage ratings, operating temperature range, and flammability certification.

The MDF7-3S-2.54DSA(38) offers the following advantages for new designs and production:

Active Product Status: Currently manufactured and supported by Hirose Electric Co Ltd, ensuring long-term availability and supply chain stability
RoHS Compliance: Certified RoHS compliant, meeting current environmental and regulatory requirements for commercial and industrial applications
Defined Moisture Sensitivity: MSL 1 (Unlimited) classification provides clear handling and storage specifications for manufacturing processes

No electrical or mechanical redesign is required when transitioning from MDF7-3S-2.54DSA(34) to MDF7-3S-2.54DSA(38). The connectors are form-fit-function compatible for all board-to-board applications within the specified electrical and thermal operating parameters.

Frequently Asked Questions (FAQ)

Q: Can MDF7-3S-2.54DSA(38) be used as a direct replacement for MDF7-3S-2.54DSA(34) without PCB modifications?

A: Yes. Both connectors share identical mechanical dimensions, pitch spacing (0.100"), mounting hole patterns, and contact configurations. No PCB layout changes are required for substitution.

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

A: The primary differences are product status and compliance documentation. MDF7-3S-2.54DSA(34) is obsolete, while MDF7-3S-2.54DSA(38) is an active product with RoHS compliance certification and defined moisture sensitivity level (MSL 1).

Q: Are the electrical ratings identical between these two connectors?

A: Yes. Both connectors are rated for 3A at 250VAC and operate across the same temperature range of -35°C to 85°C. Both meet UL94 V-0 flammability requirements.

Q: What does MSL 1 (Unlimited) mean for the MDF7-3S-2.54DSA(38)?

A: MSL 1 (Unlimited) indicates that the connector has unlimited shelf life under normal storage conditions and does not require special moisture control or baking procedures prior to soldering, simplifying manufacturing logistics.

Q: Are there any compatibility concerns when mixing MDF7-3S-2.54DSA(34) and MDF7-3S-2.54DSA(38) connectors in the same assembly?

A: No compatibility issues exist. Both connectors use identical contact geometry, pitch, and mating force specifications, allowing them to mate with the same plug connectors and function interchangeably in board-to-board applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message