MDF7-34D-2.54DSA(70) Equivalent & Substitute Parts

Part Overview

The MDF7-34D-2.54DSA(70) is a 34-position receptacle connector manufactured by Hirose Electric Co Ltd, designed for board-to-board applications with bottom entry configuration and 0.100" (2.54mm) pitch. This connector features through-hole solder termination and push-pull fastening, rated for 3A at 250VAC operation across -35°C to 85°C temperature range.

The MDF7-34D-2.54DSA(70) is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production and maintenance requirements for systems utilizing this connector.

Key Parameters

Parameter	Value
Connector Type	Receptacle, Bottom Entry
Number of Positions	34
Pitch - Mating	0.100" (2.54mm)
Number of Rows	2
Row Spacing - Mating	0.100" (2.54mm)
Mounting Type	Through Hole
Termination	Solder
Fastening Type	Push-Pull
Current Rating	3A
Voltage Rating	250VAC
Operating Temperature	-35°C ~ 85°C
Insulation Material	Polyamide (PA), Nylon
Contact Material	Phosphor Bronze
Material Flammability Rating	UL94 V-0

Substitute Part Grouping Explanation

Substitution eligibility for the MDF7-34D-2.54DSA(70) is determined by strict equivalence across the following critical parameters:

Connector type: Receptacle, bottom entry configuration
Position count: 34 positions
Pitch specification: 0.100" (2.54mm) mating pitch
Row configuration: 2 rows with 0.100" (2.54mm) row spacing
Mounting method: Through-hole solder termination
Fastening mechanism: Push-pull engagement
Electrical ratings: 3A current, 250VAC voltage
Operating temperature range: -35°C to 85°C
Material compliance: UL94 V-0 flammability rating

The MDF7-34D-2.54DSA(74) meets all substitution criteria as a direct equivalent within the MDF7 series, maintaining identical mechanical and electrical specifications while offering active product status and enhanced compliance documentation.

Parameter Comparison

Parameter	MDF7-34D-2.54DSA(70)	MDF7-34D-2.54DSA(74)
Manufacturer	Hirose Electric Co Ltd	Hirose Electric Co Ltd
Series	MDF7	MDF7
Product Status	Obsolete	Active
Connector Type	Receptacle, Bottom Entry	Receptacle, Bottom Entry
Number of Positions	34	34
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)
Mounting Type	Through Hole	Through Hole
Termination	Solder	Solder
Fastening Type	Push-Pull	Push-Pull
Current Rating (Amps)	3A	3A
Voltage Rating	250VAC	250VAC
Operating Temperature	-35°C ~ 85°C	-35°C ~ 85°C
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)
Insulation Material	Polyamide (PA), Nylon	Polyamide (PA), Nylon
Contact Shape	Square	Square
Contact Material	Phosphor Bronze	Phosphor Bronze
Material Flammability Rating	UL94 V-0	UL94 V-0
ECCN	EAR99	EAR99
HTSUS	8536.69.4040	8536.69.4040

Engineering Selection Recommendations

The MDF7-34D-2.54DSA(74) is the direct substitute for the obsolete MDF7-34D-2.54DSA(70). Both connectors are manufactured by Hirose Electric Co Ltd within the same MDF7 series and maintain identical mechanical and electrical specifications.

The MDF7-34D-2.54DSA(74) offers the advantage of active product status, ensuring ongoing manufacturer support and availability. The substitute part carries RoHS compliance certification and Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), providing enhanced environmental and handling documentation compared to the original part.

Selection of the MDF7-34D-2.54DSA(74) is appropriate for new designs, production continuity, and field replacements where the MDF7-34D-2.54DSA(70) is no longer available.

Frequently Asked Questions (FAQ)

Q: Can the MDF7-34D-2.54DSA(74) be used as a direct replacement for the MDF7-34D-2.54DSA(70)?

A: Yes. Both connectors share identical specifications across all critical parameters: 34-position receptacle configuration, 0.100" (2.54mm) pitch, 2-row layout, through-hole solder termination, push-pull fastening, 3A/250VAC ratings, and -35°C to 85°C operating range. No circuit or PCB modifications are required.

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

A: The MDF7-34D-2.54DSA(70) is classified as obsolete, while the MDF7-34D-2.54DSA(74) maintains active product status. The substitute part includes RoHS compliance documentation and defined Moisture Sensitivity Level (MSL) rating of 1 (Unlimited).

Q: Are there any mechanical compatibility concerns when substituting the MDF7-34D-2.54DSA(74) for the MDF7-34D-2.54DSA(70)?

A: No. Both connectors maintain identical mechanical dimensions, including insulation height of 0.197" (5.00mm), contact length of 0.118" (3.00mm), and pitch specifications. PCB footprints and mating interface requirements are identical.

Q: What is the inventory status for the substitute part?

A: The MDF7-34D-2.54DSA(74) has 1127 pieces available as new original stock.

Q: Are both parts compliant with the same flammability standards?

A: Yes. Both the MDF7-34D-2.54DSA(70) and MDF7-34D-2.54DSA(74) meet UL94 V-0 material flammability rating requirements.

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