MDF7-9S-2.54DSA Equivalent & Substitute Parts

Part Overview

The MDF7-9S-2.54DSA is a 9-position rectangular 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, tin-plated contacts, and operates across -35°C to 85°C. The main part is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications.

Substiute Parts

MDF7-9S-2.54DSA

Hirose Electric Co LtdIn Stock: 1135MDF7-9S-2.54DSA Datasheet

Current PartRFQ

MDF7-9S-2.54DSA(55)

Hirose Electric Co LtdIn Stock: 962MDF7-9S-2.54DSA(55) Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MDF7-9S-2.54DSA is determined by strict equivalence across the following critical parameters:

• Connector type: Receptacle, bottom entry configuration
• Number of positions: 9 positions
• Pitch specification: 0.100" (2.54mm) mating pitch
• Mounting method: Through hole solder termination
• Electrical ratings: 3A current, 250VAC voltage
• Operating temperature range: -35°C to 85°C
• Contact material and finish: Phosphor bronze with tin plating
• Insulation material: Polyamide (PA), Nylon
• Flammability rating: UL94 V-0

The identified substitute maintains full electrical and mechanical compatibility with the original specification while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The MDF7-9S-2.54DSA(55) serves as the direct substitute for the obsolete MDF7-9S-2.54DSA. Both connectors are manufactured by Hirose Electric Co Ltd and maintain identical electrical and mechanical specifications across all critical parameters including connector type, position count, pitch, mounting method, current and voltage ratings, and operating temperature range.

The primary distinction between the two parts is product status and regulatory compliance. The MDF7-9S-2.54DSA(55) is classified as active, ensuring continued availability and manufacturer support. Additionally, the substitute achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. The contact finish thickness on the mating surface is increased from 39.4µin (1.00µm) to 78.7µin (2.00µm) in the substitute, providing enhanced durability and contact reliability.

For new designs and ongoing production requiring this connector type, the MDF7-9S-2.54DSA(55) is the appropriate selection. For legacy systems currently using the original part, direct substitution is electrically and mechanically compatible without design modification.

Frequently Asked Questions (FAQ)

Q: Are the MDF7-9S-2.54DSA and MDF7-9S-2.54DSA(55) electrically interchangeable?

A: Yes. Both connectors maintain identical electrical specifications: 3A current rating, 250VAC voltage rating, and -35°C to 85°C operating temperature range. The contact material, finish type, and insulation properties are equivalent.

Q: What is the difference in contact finish thickness between these parts?

A: The original MDF7-9S-2.54DSA features 39.4µin (1.00µm) tin plating on mating contacts, while the MDF7-9S-2.54DSA(55) provides 78.7µin (2.00µm) thickness. The increased thickness in the substitute enhances contact durability and wear resistance.

Q: Can I use MDF7-9S-2.54DSA(55) in place of MDF7-9S-2.54DSA in existing assemblies?

A: Yes. The substitute maintains identical mechanical dimensions, pitch, mounting configuration, and through-hole termination. No PCB redesign or assembly process modification is required.

Q: What is the significance of the RoHS compliance difference?

A: The original part is RoHS non-compliant, while the substitute achieves ROHS3 compliance. For applications subject to RoHS regulations or customer requirements, the MDF7-9S-2.54DSA(55) is the appropriate selection.

Q: Are there packaging differences between these connectors?

A: The original part packaging is unspecified, while the substitute is supplied in bulk packaging. Verify packaging requirements for your procurement and assembly processes.

Q: Why is the original MDF7-9S-2.54DSA classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support. The MDF7-9S-2.54DSA(55) represents the current active equivalent from Hirose Electric Co Ltd.