Amphenol ICC 51939-084 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51939-084 is a 36-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 12 power positions. The connector is part of the PwrBlade® series and utilizes gold or gold GXT™ contact finish with UL94 V-0 flammability rating.

The 51939-084 is currently listed as obsolete, which necessitates identification of active equivalent parts to maintain design continuity and ensure ongoing component availability for production and maintenance applications.

Substiute Parts

51939-084

Amphenol ICC (FCI)In Stock: 117051939-084 Datasheet

Current PartRFQ

51939-084LF

Amphenol ICC (FCI)In Stock: 101651939-084LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 51939-084LF qualifies as a direct substitute based on identical electrical and mechanical parameters across all critical substitution criteria:

Matching Parameters:

• Connector type, style, and configuration (Header, Male Pins and Blades, Blade Power)
• Position count and arrangement (36 positions, 4 rows)
• Pitch specification (0.100" / 2.54mm)
• Mounting method (Board Edge, Through Hole, Right Angle)
• Termination type (Solder)
• Contact layout distribution (24 Signal, 12 Power)
• Contact finish specification and thickness (Gold or Gold, GXT™, 30.0µin)
• Physical color (Black)
• Flammability rating (UL94 V-0)
• Operating temperature range (-20°C ~ 105°C)
• Series designation (PwrBlade®)

The primary distinction between these parts is product status and compliance certification, not functional or physical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The 51939-084LF is the direct functional equivalent of the obsolete 51939-084. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and form-factor compatibility in existing designs.

Selection between these parts should be based on regulatory and compliance requirements:

51939-084LF is the preferred choice for new designs and ongoing production due to its active product status and RoHS compliance certification. The "LF" designation indicates lead-free construction, meeting modern environmental and regulatory standards. This part is currently in stock and represents the manufacturer's active offering within the PwrBlade® 36-position blade power connector family.

51939-084 remains available from existing inventory (1076 pcs) for legacy system maintenance or applications where RoHS non-compliant components are acceptable. However, this part is obsolete and future availability cannot be assured.

Both parts carry identical ECCN (EAR99) and HTSUS (8536.69.4040) classifications, maintaining consistent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Are the 51939-084 and 51939-084LF electrically and mechanically identical?

A: Yes. Both parts feature identical connector type, position count, pitch, mounting configuration, contact layout, finish specification, and operating parameters. They are functionally interchangeable in circuit design and PCB layout.

Q: What does the "LF" suffix in 51939-084LF indicate?

A: The "LF" designation indicates lead-free construction and RoHS compliance. The 51939-084LF meets modern environmental regulations, while the 51939-084 is RoHS non-compliant.

Q: Can I use 51939-084LF as a direct replacement for 51939-084 in existing designs?

A: Yes. The parts are functionally equivalent with identical electrical and mechanical specifications. No design changes are required for substitution.

Q: What is the difference in packaging between these parts?

A: The 51939-084LF is supplied in Tray packaging. The 51939-084 packaging specification is not provided in the technical data.

Q: Why is the 51939-084 listed as obsolete?

A: The 51939-084 has been superseded by the 51939-084LF, which offers RoHS compliance and lead-free construction. Amphenol ICC has transitioned this product line to the compliant variant.

Q: Are there any temperature or environmental operating differences between these parts?

A: No. Both parts operate across the identical temperature range of -20°C to 105°C and share the same UL94 V-0 flammability rating and moisture sensitivity level (MSL 1 - Unlimited).

Q: What is the contact finish specification for both parts?

A: Both parts utilize gold or gold GXT™ contact finish with a thickness of 30.0µin (0.76µm), ensuring consistent electrical performance and corrosion resistance.