Amphenol ICC 51939-072 Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-072 is a 36-position backplane connector header featuring male pins and blades with right-angle board edge mounting. This connector is designed for through-hole soldering applications and incorporates blade power technology with integrated board lock and mating guide features. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

51939-072

Amphenol ICC (FCI)In Stock: 107151939-072 Datasheet

Current PartRFQ

51720-10402804AALF

Amphenol ICC (FCI)In Stock: 116751720-10402804AALF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 51939-072 is determined by strict equivalence across the following critical parameters:

• Connector type: Header with male pins and blades
• Number of positions: 36
• Pitch: 0.100" (2.54mm)
• Number of rows: 4
• Mounting configuration: Board edge, through hole, right angle
• Termination method: Solder
• Contact layout: 28 signal, 8 power
• Contact finish: Gold or Gold, GXT™
• Contact finish thickness: 30.0µin (0.76µm)
• Color: Black
• Material flammability: UL94 V-0
• Operating temperature range: -20°C ~ 105°C

The substitute part 51720-10402804AALF maintains full electrical and mechanical compatibility with the original 51939-072 across all specified parameters while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 51720-10402804AALF is the direct substitute for the obsolete 51939-072. Both components maintain identical electrical and mechanical specifications across all critical parameters. The substitute part offers the following advantages:

• Active product status ensures continued availability and manufacturer support
• RoHS compliance meets current regulatory requirements for new designs and procurement
• REACH compliance status documented for supply chain transparency
• Tray packaging specified for production handling

Selection of the 51720-10402804AALF is appropriate for both legacy system maintenance and new design implementations requiring PwrBlade® 36-position backplane connector headers with the specified electrical and mechanical characteristics.

Frequently Asked Questions (FAQ)

Q: Are the 51939-072 and 51720-10402804AALF electrically interchangeable?

A: Yes. Both connectors maintain identical contact layout (28 signal, 8 power), pitch (0.100"), number of positions (36), and contact finish specifications (Gold or Gold, GXT™ at 30.0µin thickness). Electrical performance is equivalent.

Q: Are the 51939-072 and 51720-10402804AALF mechanically interchangeable?

A: Yes. Both connectors feature identical mounting configuration (board edge, through hole, right angle), number of rows (4), termination method (solder), and physical color (black). Board lock and mating guide features are present on both parts.

Q: What is the primary difference between these two parts?

A: The 51720-10402804AALF is an active product with RoHS compliance, while the 51939-072 is obsolete and RoHS non-compliant. The substitute part is supplied in tray packaging.

Q: Can the 51720-10402804AALF be used in existing designs originally specified for the 51939-072?

A: Yes. Full electrical and mechanical compatibility across all specified parameters supports direct substitution in existing applications.

Q: Are there any temperature or environmental limitations when substituting the 51720-10402804AALF?

A: Both parts share identical operating temperature range (-20°C ~ 105°C) and material flammability rating (UL94 V-0). Environmental performance is equivalent.

Q: What packaging format is the 51720-10402804AALF supplied in?

A: The substitute part is supplied in tray packaging, as specified in the product documentation.