Amphenol ICC 51940-028 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-028 is a 35-position blade power receptacle connector from the PwrBlade® series, designed for through-hole PCB mounting applications. This connector features female sockets and blade sockets in a black housing with board lock and guide pin features. The part is currently listed as obsolete, making identification of suitable substitutes necessary for ongoing system support and component procurement.

Substiute Parts

51940-028

Amphenol ICC (FCI)In Stock: 80951940-028 Datasheet

Current PartRFQ

51940-028LF

Amphenol ICC (FCI)In Stock: 79051940-028LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 51940-028LF qualifies as a direct equivalent based on the following critical parameters that determine substitutability:

• Connector Type & Configuration: Both parts are receptacle connectors with female sockets and blade sockets
• Position Count & Pitch: Identical 35-position configuration at 0.100" (2.54mm) pitch
• Physical Layout: Both feature 4 rows with identical contact layout (24 Signal, 11 Power)
• Mounting & Termination: Through-hole solder termination on both parts
• Electrical & Environmental Specifications: Matching operating temperature range (-20°C ~ 105°C), UL94 V-0 flammability rating, and contact finish specifications
• Mechanical Features: Both include board lock and guide pin features

The primary distinction between these parts is packaging format and product status. The 51940-028LF is supplied in tray packaging and maintains active product status with RoHS compliance, whereas the 51940-028 is obsolete and non-RoHS compliant.

Parameter Comparison

Engineering Selection Recommendations

The 51940-028LF is the appropriate selection for new designs and component replenishment. This part maintains identical electrical, mechanical, and environmental specifications to the 51940-028 while offering the following advantages:

• Active Product Status: The 51940-028LF is an active product with ongoing manufacturer support, whereas the 51940-028 is obsolete
• RoHS Compliance: The 51940-028LF meets RoHS requirements, supporting compliance with current regulatory standards and procurement policies
• REACH Compliance: The 51940-028LF is REACH-affected, indicating current regulatory documentation and traceability
• Packaging Efficiency: Tray packaging provides improved handling and inventory management compared to standard packaging

For applications currently using the 51940-028, direct substitution with 51940-028LF is supported without design modifications, as all functional and mechanical parameters remain identical.

Frequently Asked Questions (FAQ)

Q: Can the 51940-028LF be used as a direct replacement for the 51940-028?

A: Yes. Both parts share identical connector type, position count, pitch, mounting method, termination style, contact layout, operating temperature range, and mechanical features. The 51940-028LF is functionally equivalent and requires no design changes.

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

A: The primary differences are product status, RoHS compliance, and packaging format. The 51940-028 is obsolete and non-RoHS compliant, while the 51940-028LF is an active product with RoHS compliance and tray packaging.

Q: Are there any compatibility concerns when switching from 51940-028 to 51940-028LF?

A: No compatibility concerns exist. The connectors are mechanically and electrically identical, with matching pin configurations, contact finishes, and environmental ratings.

Q: Does the tray packaging of the 51940-028LF affect its performance?

A: No. Packaging format does not affect connector performance or electrical characteristics. Tray packaging is a handling and storage consideration only.

Q: Is the 51940-028LF suitable for applications requiring RoHS compliance?

A: Yes. The 51940-028LF is RoHS compliant and appropriate for applications with RoHS requirements.