Amphenol ICC 51940-053 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-053 is a 29-position blade power receptacle connector designed for through-hole PCB mounting. This connector features female sockets and blade sockets in a 4-row configuration with 24 signal and 5 power contacts. The part is classified as obsolete, making identification of suitable alternatives essential for ongoing system support and new design implementations.

The primary reason for identifying substitute parts is the obsolete status of the original component, which may result in limited availability and extended lead times. Active production alternatives with identical electrical and mechanical specifications ensure design continuity and supply chain reliability.

Substiute Parts

51940-053

Amphenol ICC (FCI)In Stock: 102451940-053 Datasheet

Current PartRFQ

51940-053LF

Amphenol ICC (FCI)In Stock: 93651940-053LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 51940-053 is determined by strict equivalence across the following critical parameters:

• Connector type: Receptacle with female sockets and blade sockets
• Connector style: Blade Power
• Number of positions: 29
• Number of rows: 4
• Pitch: 0.100" (2.54mm)
• Mounting type: Through hole
• Termination method: Solder
• Contact layout: 24 signal, 5 power
• Features: Board lock and guide pin
• Contact finish: Gold or Gold, GXT™
• Contact finish thickness: 30.0µin (0.76µm)
• Color: Black
• Material flammability rating: UL94 V-0
• Operating temperature range: -20°C to 105°C
• Moisture sensitivity level: 1 (Unlimited)

The identified substitute part maintains full electrical and mechanical compatibility with the original specification. Differences in product status and RoHS compliance do not affect functional interchangeability in existing designs.

Parameter Comparison

Engineering Selection Recommendations

The 51940-053LF is the direct functional equivalent of the 51940-053. Both parts are manufactured by Amphenol ICC within the PwrBlade® series and maintain identical electrical and mechanical specifications across all critical parameters.

The primary distinction between these parts is product status and compliance posture. The 51940-053 is obsolete and RoHS non-compliant, while the 51940-053LF is in active production and RoHS compliant. For new designs or systems requiring regulatory compliance with RoHS directives, the 51940-053LF is the appropriate selection. For legacy system maintenance where the original part specification must be preserved, the 51940-053LF provides full functional compatibility without design modification.

Packaging differs between the two parts: the original uses bulk packaging while the substitute is supplied in trays. This difference does not affect electrical or mechanical performance and relates only to handling and logistics.

Frequently Asked Questions (FAQ)

Q: Can the 51940-053LF be used as a direct replacement for the 51940-053 in existing designs?

A: Yes. The 51940-053LF maintains identical electrical and mechanical specifications. No design modifications are required for substitution. The parts are pin-compatible and functionally equivalent across all operating parameters.

Q: What is the significance of the "LF" suffix in the part number 51940-053LF?

A: The "LF" designation indicates lead-free construction and RoHS compliance. This reflects the manufacturing process and material composition rather than functional differences. The connector operates identically to the original part.

Q: Are there differences in reliability or performance between these parts?

A: No. Both parts meet the same UL94 V-0 flammability rating, operate across the identical temperature range (-20°C to 105°C), and feature the same contact finish specifications. Performance and reliability characteristics are equivalent.

Q: How does packaging affect part selection?

A: Packaging (bulk versus tray) affects handling, storage, and logistics but does not impact electrical or mechanical performance. Selection should be based on procurement and assembly requirements rather than functional considerations.

Q: Is the 51940-053LF suitable for applications requiring RoHS compliance?

A: Yes. The 51940-053LF is RoHS compliant, making it appropriate for applications and markets with RoHS requirements. The original 51940-053 is RoHS non-compliant.

Q: What is the moisture sensitivity level, and why does it matter?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity. These connectors do not require special moisture control during storage, handling, or assembly, simplifying procurement and manufacturing processes.