Amphenol ICC 51939-062 Backplane Connector Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-062 is a 35-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 with a contact layout of 20 signal and 15 power positions.

The 51939-062 is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production and maintenance requirements for systems utilizing this connector architecture.

Key Parameters

Parameter	Value
Manufacturer Part Number	51939-062
Manufacturer	Amphenol ICC (FCI)
Series	PwrBlade®
Number of Positions	35
Pitch	0.100" (2.54mm)
Number of Rows	4
Connector Type	Header, Male Pins and Blades
Mounting Type	Board Edge, Through Hole, Right Angle
Contact Layout	20 Signal, 15 Power
Termination	Solder
Color	Black
Operating Temperature Range	-20°C to 105°C
Material Flammability Rating	UL94 V-0
Contact Finish	Gold or Gold, GXT™
Contact Finish Thickness	30.0µin (0.76µm)
Features	Board Lock, Mating Guide
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 51939-062 is determined by strict equivalence across the following critical parameters:

Connector Architecture: Header configuration with male pins and blades in PwrBlade® series
Position Count and Layout: 35 total positions with 20 signal and 15 power contact arrangement
Pitch and Row Configuration: 0.100" (2.54mm) pitch with 4-row arrangement
Mounting Specification: Board edge, through-hole, right-angle orientation
Electrical and Mechanical Properties: Solder termination, gold contact finish at 30.0µin thickness, UL94 V-0 flammability rating, operating temperature range of -20°C to 105°C
Physical Characteristics: Black color with board lock and mating guide features

The substitute part 51939-062LF meets all these criteria while offering active product status and improved compliance posture.

Parameter Comparison

Parameter	51939-062 (Main Part)	51939-062LF (Substitute)
Manufacturer	Amphenol ICC (FCI)	Amphenol ICC (FCI)
Series	PwrBlade®	PwrBlade®
Number of Positions	35	35
Pitch	0.100" (2.54mm)	0.100" (2.54mm)
Number of Rows	4	4
Connector Type	Header, Male Pins and Blades	Header, Male Pins and Blades
Mounting Type	Board Edge, Through Hole, Right Angle	Board Edge, Through Hole, Right Angle
Contact Layout	20 Signal, 15 Power	20 Signal, 15 Power
Termination	Solder	Solder
Color	Black	Black
Operating Temperature Range	-20°C to 105°C	-20°C to 105°C
Material Flammability Rating	UL94 V-0	UL94 V-0
Contact Finish	Gold or Gold, GXT™	Gold or Gold, GXT™
Contact Finish Thickness	30.0µin (0.76µm)	30.0µin (0.76µm)
Features	Board Lock, Mating Guide	Board Lock, Mating Guide
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	RoHS Compliant
REACH Status	Not specified	REACH Affected
Packaging	Not specified	Tray

Engineering Selection Recommendations

The 51939-062LF is the direct substitute for the obsolete 51939-062. Both parts maintain identical electrical and mechanical specifications across all critical parameters including position count, pitch, mounting configuration, contact layout, and operating characteristics.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The 51939-062LF carries active product status, ensuring ongoing manufacturer support and supply availability. Additionally, the 51939-062LF is RoHS compliant and REACH affected, providing enhanced environmental and regulatory alignment compared to the non-compliant 51939-062.

For new designs and ongoing production requirements, the 51939-062LF is the appropriate selection. For legacy system maintenance where the original 51939-062 is specified, the 51939-062LF provides full functional and mechanical compatibility with improved compliance posture.

Frequently Asked Questions (FAQ)

Q: Are the 51939-062 and 51939-062LF mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including 35-position configuration, 0.100" pitch, 4-row arrangement, board edge through-hole right-angle mounting, and physical dimensions. They are direct mechanical substitutes.

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

A: The primary differences are product status and regulatory compliance. The 51939-062 is obsolete and RoHS non-compliant, while the 51939-062LF is active product status and RoHS compliant with REACH affected designation. All electrical and mechanical parameters are identical.

Q: Can I use 51939-062LF as a replacement for 51939-062 in existing designs?

A: Yes. The 51939-062LF is a direct functional and mechanical equivalent. No design modifications are required for substitution. The improved compliance status of the 51939-062LF makes it the preferred choice for both new and legacy applications.

Q: What is the packaging difference?

A: The 51939-062LF is supplied in Tray packaging. Packaging specifications for the 51939-062 were not provided in the technical documentation.

Q: Are the contact finishes identical?

A: Yes. Both parts feature gold or gold GXT™ contact finish with 30.0µin (0.76µm) thickness, ensuring equivalent electrical performance and reliability.

Q: What is the operating temperature range for both parts?

A: Both the 51939-062 and 51939-062LF operate across the identical temperature range of -20°C to 105°C.

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