Amphenol ICC 51939-199 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-199 is a 25-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, configured with 16 signal and 9 power contacts in a 4-row layout. The part is classified as obsolete, making identification of active equivalent components essential for ongoing system support and new design implementations.

Substiute Parts

51939-199

Amphenol ICC (FCI)In Stock: 90951939-199 Datasheet

Current PartRFQ

51939-199LF

Amphenol ICC (FCI)In Stock: 69551939-199LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 51939-199 is determined by strict equivalence across the following critical parameters:

• Connector type, style, and position count (25-position blade power header)
• Pitch specification (0.100" / 2.54mm)
• Row configuration (4 rows)
• Contact layout distribution (16 signal, 9 power)
• Mounting method (board edge, through-hole, right-angle)
• Termination type (solder)
• Contact finish specification (gold or gold, GXT™)
• Color (black)
• Operating temperature range (-20°C ~ 105°C)
• Flammability rating (UL94 V-0)
• Series designation (PwrBlade®)

The 51939-199LF meets all these criteria and serves as the direct active equivalent. The primary distinction is product status and compliance certification.

Parameter Comparison

Engineering Selection Recommendations

The 51939-199LF is the direct functional equivalent of the 51939-199 and is the appropriate selection for new designs and component replacement applications. The 51939-199LF maintains identical electrical and mechanical specifications while offering the following advantages:

• Active product status ensures ongoing availability and manufacturer support
• RoHS compliance certification meets current regulatory requirements
• REACH compliance status provides environmental and supply chain documentation
• Tray packaging accommodates modern manufacturing and assembly processes

The 51939-199 remains suitable for legacy system maintenance only where existing inventory is available and regulatory compliance is not a requirement.

Frequently Asked Questions (FAQ)

Q: Are the 51939-199 and 51939-199LF mechanically interchangeable?

A: Yes. Both connectors share identical mechanical specifications including pitch (0.100"), position count (25), row configuration (4), mounting method (board edge, through-hole, right-angle), and physical dimensions. Direct substitution is possible without PCB redesign.

Q: What is the significance of the "LF" suffix in the 51939-199LF part number?

A: The "LF" designation indicates lead-free termination and RoHS compliance. This reflects the manufacturing process and material composition rather than functional differences in connector operation.

Q: Can the 51939-199 be used in applications requiring RoHS compliance?

A: No. The 51939-199 is RoHS non-compliant. Applications subject to RoHS regulations must use the 51939-199LF.

Q: Are there packaging differences between these parts?

A: Yes. The 51939-199 is supplied in bulk packaging, while the 51939-199LF is supplied in tray packaging. Tray packaging is standard for modern manufacturing environments and automated assembly processes.

Q: Do both parts operate across the same temperature range?

A: Yes. Both connectors operate from -20°C to 105°C and maintain identical contact finish specifications (gold or gold, GXT™ at 30.0µin thickness).

Q: Is the 51939-199 still available for purchase?

A: The 51939-199 is classified as obsolete. While existing inventory may be available through component distributors, the 51939-199LF is the recommended active equivalent for all new applications.