Amphenol ICC 51939-021 PwrBlade® Right Angle Header Connector

Part Overview

The Amphenol ICC 51939-021 is a 3-position PwrBlade® right angle header connector with male blades designed for board edge, through-hole mounting applications. This connector features a blade power configuration with gold-plated contacts and UL94 V-0 flammability rating, suitable for power distribution in backplane applications.

The 51939-021 is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this connector.

Substiute Parts

51939-021

Amphenol ICC (FCI)In Stock: 117451939-021 Datasheet

Current PartRFQ

51939-021LF

Amphenol ICC (FCI)In Stock: 96451939-021LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 51939-021 is determined by strict equivalence across the following critical parameters:

• Connector type and style (Header, Male Blades; Blade Power configuration)
• Number of positions and contact layout (3 positions, 3 Power)
• Pitch specification (0.300" / 7.62mm)
• Mounting configuration (Board Edge, Through Hole, Right Angle)
• Termination method (Solder)
• Contact finish and thickness (Gold or Gold, GXT™; 30.0µin)
• Material flammability rating (UL94 V-0)
• Operating temperature range (-20°C to 105°C)
• Series designation (PwrBlade®)

The substitute part 51939-021LF meets all these criteria and is derived from the same base product number (51939), confirming functional and mechanical equivalence.

Parameter Comparison

Engineering Selection Recommendations

The 51939-021LF is the direct substitute for the obsolete 51939-021. Both parts are functionally and mechanically equivalent across all specified electrical and mechanical parameters.

The primary distinction between these parts is regulatory compliance status. The 51939-021LF carries active product status and RoHS compliance certification, whereas the 51939-021 is obsolete and RoHS non-compliant. For new designs or ongoing production requiring regulatory compliance with current environmental standards, the 51939-021LF is the appropriate selection.

The 51939-021LF is supplied in tray packaging, which may differ from the original part's packaging configuration. Verify packaging requirements against procurement and assembly specifications before finalizing component selection.

Frequently Asked Questions (FAQ)

Q: Can the 51939-021LF be used as a direct replacement for the 51939-021?

A: Yes. The 51939-021LF is electrically and mechanically equivalent to the 51939-021 across all specified parameters, including connector type, position count, pitch, mounting configuration, contact finish, and operating temperature range.

Q: What is the significance of the "LF" designation in the part number 51939-021LF?

A: The "LF" suffix indicates lead-free construction, which aligns with RoHS compliance requirements. This is the primary technical distinction between the two parts.

Q: Are there any compatibility concerns when substituting the 51939-021LF for the 51939-021?

A: No compatibility concerns exist for electrical or mechanical function. Both parts share identical connector specifications. Verify that your assembly process and solder profile are compatible with lead-free termination if transitioning from the original part.

Q: What packaging format is the 51939-021LF supplied in?

A: The 51939-021LF is supplied in tray packaging. Confirm this packaging format aligns with your receiving, storage, and assembly requirements.

Q: Why is the 51939-021 classified as obsolete?

A: The 51939-021 is obsolete due to the industry transition toward RoHS-compliant components. The 51939-021LF represents the current active product offering from Amphenol ICC for this connector configuration.