Amphenol ICC 51940-141 Backplane Connector Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-141 is a 21-position receptacle connector featuring female sockets and blade sockets for through-hole PCB mounting in blade power applications. This connector is part of the PwrBlade® series and provides a contact layout of 16 signal and 5 power positions with gold-plated contacts and guide pin features.

The 51940-141 carries an obsolete product status. Locating equivalent or substitute components is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this connector.

Substiute Parts

51940-141

Amphenol ICC (FCI)In Stock: 88251940-141 Datasheet

Current PartRFQ

51940-141LF

Amphenol ICC (FCI)In Stock: 113251940-141LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 51940-141 is determined by strict equivalence across the following critical parameters:

• Connector type: Receptacle with female sockets and blade sockets
• Position count: 21 total positions with 17 loaded
• Pitch specification: 0.100" (2.54mm)
• Row configuration: 4 rows
• Mounting method: Through hole
• Termination style: Press-fit and solder capable
• Contact layout: 16 signal, 5 power distribution
• Contact finish: Gold plating at 30.0µin thickness
• Housing color: Black
• Temperature operating range: -20°C to 105°C
• Flammability rating: UL94 V-0

The 51940-141LF meets all these criteria and qualifies as a direct substitute. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The 51940-141LF is the direct substitute for the obsolete 51940-141. Both connectors share identical electrical and mechanical specifications across all critical parameters. The 51940-141LF is currently in active production status with improved compliance posture.

Selection between these parts should be based on the following factors:

Product Status: The 51940-141 is obsolete. The 51940-141LF is active and maintains ongoing manufacturing support and availability.

Compliance: The 51940-141LF carries RoHS compliance certification, whereas the 51940-141 is RoHS non-compliant. For applications subject to RoHS regulatory requirements, the 51940-141LF is the appropriate selection. The 51940-141LF also carries REACH affected status, indicating compliance with REACH chemical substance regulations.

Packaging: The 51940-141LF is supplied in tray packaging, which may differ from the original part's packaging configuration. Verify packaging compatibility with assembly and handling processes.

Availability: The 51940-141LF maintains higher inventory levels and active supply chain status, supporting long-term design continuity.

Frequently Asked Questions (FAQ)

Q: Are the 51940-141 and 51940-141LF mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including pitch (0.100"), position count (21 total, 17 loaded), row configuration (4 rows), mounting type (through hole), and housing color (black). PCB footprints and mounting hole patterns are identical.

Q: Are the 51940-141 and 51940-141LF electrically interchangeable?

A: Yes. Both connectors feature identical electrical specifications including contact layout (16 signal, 5 power), contact finish (gold, 30.0µin), termination method (press-fit and solder), and operating temperature range (-20°C to 105°C). Contact resistance and signal integrity characteristics are equivalent.

Q: What is the significance of the "LF" suffix in the 51940-141LF part number?

A: The "LF" suffix indicates lead-free construction, which aligns with RoHS compliance requirements. This designation reflects the material composition of the connector's solder-compatible termination.

Q: Can I use the 51940-141LF as a direct replacement in existing designs specified for the 51940-141?

A: Yes, provided that the design does not explicitly require RoHS non-compliant components. The 51940-141LF is a direct functional and mechanical equivalent. Verify that tray packaging is compatible with your assembly process.

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

A: The 51940-141 is supplied in bulk packaging, while the 51940-141LF is supplied in tray packaging. Tray packaging provides improved component protection and organization during handling and assembly. Confirm compatibility with your receiving, storage, and pick-and-place equipment.

Q: Are there any performance differences between the 51940-141 and 51940-141LF?

A: No. Both connectors deliver identical performance across all specified electrical and mechanical parameters. The primary differences are product status (obsolete versus active), compliance certifications (RoHS), and packaging format.

Q: Why should I transition from the 51940-141 to the 51940-141LF?

A: The 51940-141 is obsolete and subject to supply discontinuation. The 51940-141LF is in active production with ongoing manufacturer support. Transitioning ensures design continuity, maintains supply chain reliability, and provides access to improved compliance certifications.