MDF7-18P-2.54DS(55) Equivalent & Substitute Parts

Part Overview

The MDF7-18P-2.54DS(55) is a rectangular connector header manufactured by Hirose Electric Co Ltd, designed for through-hole, right-angle board-to-board applications with 18 positions at 0.100" (2.54mm) pitch. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and procurement continuity. The substitute part maintains core electrical and mechanical compatibility while offering active product status and improved availability.

Substiute Parts

MDF7-18P-2.54DS(55)

Hirose Electric Co LtdIn Stock: 927MDF7-18P-2.54DS(55) Datasheet

Current PartRFQ

MDF7-18P-2.54DS(95)

Hirose Electric Co LtdIn Stock: 870MDF7-18P-2.54DS(95) Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The MDF7-18P-2.54DS(95) qualifies as a direct substitute based on the following critical parameters:

• Series Match: Both parts belong to the MDF7 series
• Connector Configuration: 18-position header with 0.100" (2.54mm) pitch
• Contact Type: Male pin, square contact shape
• Electrical Ratings: Identical current (3A) and voltage (250V) specifications
• Material Composition: Brass contacts with tin finish; PBT insulation (UL94 V-0)
• Operating Temperature Range: -35°C ~ 85°C
• Termination Method: Solder termination
• Compliance: RoHS compliant; MSL 1 (Unlimited)

The primary distinction lies in the application style (Board to Cable/Wire versus Board to Board) and product status transition from obsolete to active.

Parameter Comparison

Engineering Selection Recommendations

The MDF7-18P-2.54DS(95) is the designated substitute for the obsolete MDF7-18P-2.54DS(55). Selection criteria are based on:

• Product Status: The substitute maintains active product status with Hirose Electric Co Ltd, ensuring long-term availability and manufacturing continuity
• Compliance Certifications: Both parts carry identical RoHS compliance and UL94 V-0 flammability ratings, meeting regulatory requirements
• Electrical and Mechanical Specifications: All critical parameters—pitch, position count, current/voltage ratings, operating temperature range, and contact materials—are identical
• Termination and Contact Geometry: Solder termination with brass contacts and tin finish are preserved, ensuring PCB assembly compatibility

The transition from Board to Board to Board to Cable/Wire application style does not affect electrical or mechanical substitution viability for header-based applications.

Frequently Asked Questions (FAQ)

Q: Can MDF7-18P-2.54DS(95) be used as a direct replacement for MDF7-18P-2.54DS(55)?

A: Yes. Both parts share identical electrical ratings (3A, 250V), mechanical configuration (18-position, 2.54mm pitch, right-angle through-hole), contact materials (brass with tin finish), and operating temperature range (-35°C ~ 85°C). The substitute is active product status, whereas the original is obsolete.

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

A: The primary difference is the application designation: MDF7-18P-2.54DS(55) is specified for Board to Board connections, while MDF7-18P-2.54DS(95) is specified for Board to Cable/Wire connections. Both use identical header connector technology and are mechanically and electrically interchangeable.

Q: Are there packaging differences between these parts?

A: The original part (55) has no specified packaging designation, while the substitute (95) is packaged in bags. This does not affect functional compatibility or electrical performance.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are RoHS compliant, carry UL94 V-0 flammability ratings, and have MSL 1 (Unlimited) moisture sensitivity levels. Electrical and safety certifications are equivalent.

Q: What is the contact length difference between these parts?

A: Contact length at mating is 0.292" (7.42mm) for MDF7-18P-2.54DS(55) and 0.293" (7.45mm) for MDF7-18P-2.54DS(95). This 0.03mm difference is within standard manufacturing tolerance and does not affect functional compatibility.