Amphenol ICC 51939-266 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-266 is a 24-position header connector from the PwrBlade® series, designed for board edge mounting with through-hole solder termination. This connector features male pins, right-angle orientation, and is configured with 4 rows of positions at 0.100" (2.54mm) pitch. The part is currently classified as obsolete, which necessitates identification of active equivalent alternatives to maintain design continuity and ensure ongoing component availability for production and service applications.

Substiute Parts

51939-266

Amphenol ICC (FCI)In Stock: 101851939-266 Datasheet

Current PartRFQ

51939-266LF

Amphenol ICC (FCI)In Stock: 98051939-266LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 51939-266 is determined by strict equivalence across the following critical parameters:

• Connector Configuration: 24 positions, 4 rows, 0.100" (2.54mm) pitch
• Connector Type & Orientation: Header with male pins, board edge mounting, right-angle configuration
• Termination Method: Solder through-hole termination
• Contact Properties: Gold or Gold GXT™ finish at 30.0µin (0.76µm) thickness
• Physical & Environmental Specifications: Black color, UL94 V-0 flammability rating, -20°C ~ 105°C operating temperature, MSL 1

The substitute part 51939-266LF maintains identical electrical and mechanical specifications while offering active product status and improved compliance posture.

Parameter Comparison

Engineering Selection Recommendations

The 51939-266LF is the direct functional equivalent of the 51939-266 and is the appropriate selection for new designs and component replenishment. The substitute part provides identical electrical and mechanical performance while offering the following advantages:

• Active Product Status: The 51939-266LF maintains active manufacturing status, ensuring long-term availability and supply chain continuity.
• RoHS Compliance: The substitute part is RoHS compliant, meeting current regulatory requirements for electronic components in most jurisdictions.
• REACH Compliance: The 51939-266LF is REACH affected, indicating compliance with European chemical safety regulations.
• Packaging: Supplied in tray packaging, suitable for automated assembly and inventory management.

Selection of the 51939-266LF eliminates obsolescence risk while maintaining full compatibility with existing PCB designs and mating connectors specified for the original part number.

Frequently Asked Questions (FAQ)

Q: Can the 51939-266LF be used as a direct replacement for the 51939-266 in existing designs?

A: Yes. The 51939-266LF is electrically and mechanically identical to the 51939-266 across all specified parameters, including connector configuration, pitch, mounting type, termination method, and contact properties. No design modifications are required.

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

A: The 51939-266 is obsolete, while the 51939-266LF is active. Additionally, the 51939-266LF is RoHS compliant and REACH affected, whereas the original part is RoHS non-compliant. Both parts are functionally equivalent.

Q: Are there any compatibility concerns with mating connectors?

A: No. Both parts share identical connector specifications: 24 positions, 4 rows, 0.100" (2.54mm) pitch, male pins, and board edge right-angle mounting. Mating connectors designed for the 51939-266 are fully compatible with the 51939-266LF.

Q: Does the packaging difference affect component performance?

A: No. Tray packaging for the 51939-266LF is a logistics and handling consideration only. It does not affect electrical performance, mechanical fit, or environmental ratings.

Q: What is the significance of the "LF" suffix in the part number?

A: The "LF" suffix indicates lead-free construction and RoHS compliance, reflecting current manufacturing standards and regulatory requirements.