Amphenol ICC 51939-147 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-147 is a 31-position blade power connector header designed for board edge, through-hole, right-angle mounting applications. This connector features male pins and blades with a 0.100" (2.54mm) pitch, configured with 24 signal contacts and 7 power contacts across 4 rows. The part is classified as obsolete, making identification of active equivalent components essential for ongoing production and maintenance applications.

Substiute Parts

51939-147

Amphenol ICC (FCI)In Stock: 110551939-147 Datasheet

Current PartRFQ

51939-147LF

Amphenol ICC (FCI)In Stock: 71551939-147LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 51939-147 is determined by strict equivalence across the following critical parameters:

• Connector type and style (Header, Male Pins and Blades; Blade Power)
• Number of positions and contact layout (31 positions; 24 Signal, 7 Power)
• Pitch and row configuration (0.100" pitch; 4 rows)
• Mounting type and termination method (Board Edge, Through Hole, Right Angle; Solder)
• Contact finish specification (Gold or Gold, GXT™)
• Operating temperature range (-20°C ~ 105°C)
• Material flammability rating (UL94 V-0)
• Series designation (PwrBlade®)

The 51939-147LF meets all these criteria and serves as the direct active equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 51939-147LF is the direct functional equivalent of the obsolete 51939-147. Both parts are manufactured by Amphenol ICC (FCI) within the PwrBlade® series and share identical electrical and mechanical specifications across all critical parameters.

The primary distinction between these parts is product status and compliance posture. The 51939-147LF is an active product with RoHS compliance and REACH applicability, whereas the 51939-147 is obsolete and RoHS non-compliant. For new designs and ongoing production requiring current component availability and regulatory compliance, the 51939-147LF is the appropriate selection.

Frequently Asked Questions (FAQ)

Q: Can the 51939-147LF directly replace the 51939-147 in existing designs?

A: Yes. Both connectors are electrically and mechanically identical across all specified parameters, including connector type, position count, pitch, mounting configuration, contact finish, and operating temperature range. The 51939-147LF is the active equivalent.

Q: What is the difference between the 51939-147 and 51939-147LF?

A: The primary differences are product status and compliance. The 51939-147 is obsolete and RoHS non-compliant, while the 51939-147LF is an active product with RoHS compliance and REACH applicability. Packaging differs, with the 51939-147LF supplied in Tray format.

Q: Are there any compatibility concerns when substituting the 51939-147LF for the 51939-147?

A: No compatibility concerns exist. The connectors are functionally equivalent with identical pin configurations, contact layouts, and mounting specifications. PCB designs and mating connector requirements remain unchanged.

Q: What is the availability status of these parts?

A: The 51939-147 is obsolete with limited remaining inventory (1082 pcs). The 51939-147LF is an active product with current inventory availability (680 pcs).

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the 51939-147 and 51939-147LF operate across the identical temperature range of -20°C to 105°C.