Amphenol ICC 51939-003 PwrBlade® Backplane Connector Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-003 is a 29-position backplane connector header featuring male pins and blades configured for board edge, through-hole, right-angle mounting. This connector is part of the PwrBlade® series and combines 16 signal contacts with 13 power contacts in a 4-row configuration with 0.100" (2.54mm) pitch spacing. The 51939-003 is classified as obsolete product status, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

51939-003

Amphenol ICC (FCI)In Stock: 120551939-003 Datasheet

Current PartRFQ

51939-003LF

Amphenol ICC (FCI)In Stock: 85951939-003LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 51939-003LF serves as the direct active equivalent to the obsolete 51939-003. Substitution is valid based on identical electrical and mechanical parameters: both parts maintain the same 29-position configuration, 4-row layout, 0.100" pitch, blade power connector style, board edge through-hole right-angle mounting, and contact layout of 16 signal and 13 power contacts. Both parts share identical termination (solder), operating temperature range (-20°C ~ 105°C), material flammability rating (UL94 V-0), contact finish specification (Gold or Gold, GXT™), and contact finish thickness (30.0µin / 0.76µm).

The critical distinction between these parts is product status and compliance: the 51939-003 is obsolete with RoHS non-compliant status, while the 51939-003LF is active product with RoHS compliant and REACH affected designations. The "LF" suffix in the 51939-003LF designation indicates lead-free compliance, reflecting the transition to modern environmental standards.

Parameter Comparison

Engineering Selection Recommendations

The 51939-003LF is the appropriate selection for new designs and ongoing procurement. The original 51939-003 is obsolete and carries RoHS non-compliant status, which restricts its use in applications subject to environmental regulations and modern supply chain requirements. The 51939-003LF maintains complete electrical and mechanical compatibility while providing active product status, RoHS compliance, and REACH compliance designation.

For existing designs currently using the 51939-003, transition to the 51939-003LF is supported by identical form factor, fit, and function across all specified parameters. No circuit redesign or PCB layout modification is required. The lead-free compliance of the 51939-003LF aligns with current manufacturing standards and regulatory requirements across global markets.

Frequently Asked Questions (FAQ)

Q: Are the 51939-003 and 51939-003LF mechanically interchangeable?

A: Yes. Both parts share identical mounting type (board edge, through-hole, right-angle), position count (29), row configuration (4), and pitch spacing (0.100" / 2.54mm). PCB footprints and mounting hole patterns are identical.

Q: What does the "LF" suffix indicate in the 51939-003LF part number?

A: The "LF" designation indicates lead-free compliance, reflecting RoHS and REACH regulatory standards. This is the primary distinction between the obsolete 51939-003 and the active 51939-003LF.

Q: Can the 51939-003LF be used as a direct replacement in existing assemblies designed for the 51939-003?

A: Yes. The 51939-003LF provides complete functional and physical compatibility. All electrical parameters, contact layout (16 signal, 13 power), termination method (solder), operating temperature range (-20°C ~ 105°C), and mechanical features (board lock, mating guide) are identical.

Q: What is the difference in packaging between these parts?

A: The 51939-003 packaging is not specified in the available data. The 51939-003LF is supplied in tray packaging. Confirm packaging requirements with your procurement specification.

Q: Are there any compliance or certification differences between these parts?

A: The 51939-003 is RoHS non-compliant. The 51939-003LF is RoHS compliant and REACH affected. Both parts maintain UL94 V-0 material flammability rating and identical contact finish specifications (Gold or Gold, GXT™ at 30.0µin / 0.76µm thickness).

Q: What is the current availability status of the 51939-003?

A: The 51939-003 is classified as obsolete product status. The 51939-003LF is active product with current manufacturing support and availability.