Amphenol ICC 51939-052 Backplane Connector Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-052 is a 43-position backplane connector header featuring male pins and blades in a right-angle, board edge, through-hole configuration. This connector is part of the PwrBlade® series and is designed for applications requiring integrated signal and power distribution on printed circuit boards.

The 51939-052 is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support legacy system maintenance where this connector type is specified.

Substiute Parts

51939-052

Amphenol ICC (FCI)In Stock: 107451939-052 Datasheet

Current PartRFQ

51939-052LF

Amphenol ICC (FCI)In Stock: 92651939-052LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 51939-052 is determined by strict equivalence across the following critical parameters:

• Connector type and style (Header, Male Pins and Blades; Blade Power configuration)
• Position count and loading (43 positions, 31 loaded)
• Pitch specification (0.100" / 2.54mm)
• Row configuration (4 rows)
• Mounting method (Board Edge, Through Hole, Right Angle)
• Termination type (Solder)
• Contact layout distribution (32 Signal, 11 Power)
• Contact finish specification (Gold or Gold, GXT™)
• Contact finish thickness (30.0µin / 0.76µm)
• Physical color (Black)
• Flammability rating (UL94 V-0)
• Operating temperature range (-20°C ~ 105°C)

The substitute part 51939-052LF meets all these criteria and is therefore electrically and mechanically equivalent to the main part number.

Parameter Comparison

Engineering Selection Recommendations

The 51939-052LF is the direct substitute for the obsolete 51939-052. Both parts are manufactured by Amphenol ICC and share identical electrical and mechanical specifications across all critical parameters.

The primary distinction between these parts is product status and regulatory compliance. The 51939-052 is obsolete and RoHS non-compliant, while the 51939-052LF is active and RoHS Compliant. For new designs or system updates, the 51939-052LF is the appropriate selection. For legacy system maintenance where the original part number is specified, the 51939-052LF provides full functional and physical compatibility.

The 51939-052LF is supplied in Tray packaging, which differs from the unspecified packaging of the original part. This packaging difference does not affect electrical or mechanical performance.

Frequently Asked Questions (FAQ)

Q: Can the 51939-052LF be used as a direct replacement for the 51939-052?

A: Yes. The 51939-052LF is electrically and mechanically equivalent to the 51939-052 across all specified parameters, including connector type, position count, pitch, mounting configuration, contact layout, finish specifications, and operating temperature range.

Q: What is the primary reason to transition from 51939-052 to 51939-052LF?

A: The 51939-052 is obsolete, making long-term supply unavailable. The 51939-052LF is an active product from the same manufacturer with identical specifications. Additionally, the 51939-052LF is RoHS Compliant, whereas the original part is RoHS non-compliant.

Q: Are there any physical or dimensional differences between these parts?

A: No. Both parts share identical physical dimensions, mounting configuration, and contact specifications. The only documented difference is packaging format (Tray for the 51939-052LF).

Q: What does "43 positions, 31 loaded" mean?

A: The connector header has 43 total position slots, but only 31 of these positions are populated with contacts. This configuration allows for 32 signal contacts and 11 power contacts as specified in the contact layout.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both the 51939-052 and 51939-052LF operate across the identical temperature range of -20°C to 105°C.