Amphenol ICC 51939-262 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-262 is a 35-position blade power connector header designed for board edge, through-hole, right-angle mounting applications. This connector features male pins and blades with a 0.100" (2.54mm) pitch, organized in 4 rows with a typical contact layout of 24 signal and 11 power contacts. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing system support and new design implementations.

Substiute Parts

51939-262

Amphenol ICC (FCI)In Stock: 109851939-262 Datasheet

Current PartRFQ

51939-262LF

Amphenol ICC (FCI)In Stock: 84451939-262LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 51939-262 is determined by strict equivalence across the following critical parameters:

• Connector Type & Style: Must be Header with Male Pins and Blades in Blade Power configuration
• Position Count & Layout: Exactly 35 positions with 24 signal and 11 power contact arrangement
• Pitch & Row Configuration: 0.100" (2.54mm) pitch with 4-row organization
• Mounting & Termination: Board edge, through-hole, right-angle mounting with solder termination
• Contact Finish & Material: Gold or Gold, GXT™ finish with UL94 V-0 flammability rating
• Operating Environment: -20°C to 105°C temperature range capability

The substitute part 51939-262LF meets all these criteria while offering improved compliance status and active product availability.

Parameter Comparison

Engineering Selection Recommendations

The 51939-262LF is the direct functional equivalent of the 51939-262, with identical electrical and mechanical specifications across all critical parameters. The primary distinction lies in product lifecycle and regulatory compliance status.

The 51939-262 is classified as obsolete, limiting long-term availability and support. The 51939-262LF maintains active product status with current manufacturing support and improved compliance posture. The 51939-262LF achieves RoHS compliance and REACH affected status, whereas the original part does not meet these regulatory requirements.

For new designs and ongoing system support, the 51939-262LF is the appropriate selection. For legacy systems currently using the 51939-262, direct substitution is electrically and mechanically valid based on parameter equivalence.

Frequently Asked Questions (FAQ)

Q: Are the 51939-262 and 51939-262LF mechanically interchangeable?

A: Yes. Both connectors share identical mounting type (board edge, through-hole, right-angle), pitch (0.100"), position count (35), and row configuration (4 rows). Physical installation and PCB layout requirements are identical.

Q: What is the functional difference between these two parts?

A: There is no functional difference. Both connectors provide identical electrical performance with 24 signal and 11 power contacts, the same contact finish (Gold or Gold, GXT™), and equivalent operating temperature range (-20°C to 105°C).

Q: Why does the 51939-262LF have "LF" in the part number?

A: The "LF" designation indicates lead-free compliance. The 51939-262LF achieves RoHS compliance, whereas the original 51939-262 does not.

Q: Can I use the 51939-262LF as a direct replacement in existing assemblies designed for the 51939-262?

A: Yes. The 51939-262LF is a direct substitute with no design modifications required. All electrical and mechanical parameters are equivalent.

Q: What is the inventory status for these parts?

A: The 51939-262 has 1,051 pieces in stock but is classified as obsolete with no ongoing production. The 51939-262LF has 804 pieces in stock and maintains active product status with current manufacturing availability.

Q: Are there any compliance differences I should consider?

A: The 51939-262LF is RoHS compliant and REACH affected, while the 51939-262 is RoHS non-compliant. For applications subject to RoHS or REACH regulations, the 51939-262LF is the required selection.