Amphenol ICC 51940-035 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-035 is a 26-position receptacle connector featuring female sockets and blade sockets for through-hole PCB mounting. Designed for blade power applications within the PwrBlade® series, this connector accommodates 24 signal contacts and 2 power contacts with a 0.100" (2.54mm) pitch across 4 rows. The 51940-035 is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

51940-035

Amphenol ICC (FCI)In Stock: 83851940-035 Datasheet

Current PartRFQ

51940-035LF

Amphenol ICC (FCI)In Stock: 91751940-035LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 51940-035 has one direct equivalent substitute: 51940-035LF. This substitution is valid based on identical electrical and mechanical parameters:

• Connector type, position count, and pitch remain unchanged
• Contact layout (24 signal, 2 power) is preserved
• Mounting method (through hole) and termination (press-fit, solder) are identical
• Operating temperature range (-20°C ~ 105°C) and flammability rating (UL94 V-0) match exactly
• Contact finish specifications (gold or gold, GXT™) are equivalent

The primary distinction between these parts is product status and compliance certification. The 51940-035LF is the active production variant with RoHS compliance and REACH compliance status, whereas the 51940-035 is obsolete and RoHS non-compliant.

Parameter Comparison

Engineering Selection Recommendations

The 51940-035LF is the appropriate selection for new designs and ongoing procurement. This part maintains full electrical and mechanical compatibility with the obsolete 51940-035 while offering active product status and current compliance certifications. The 51940-035LF carries RoHS compliance and REACH compliance status, meeting contemporary regulatory requirements for electronic component procurement in regulated markets.

For legacy systems currently using the 51940-035, direct substitution with 51940-035LF is electrically and mechanically valid. The transition from non-compliant to compliant status does not alter connector functionality, pin configuration, or performance characteristics within the specified operating temperature range.

Frequently Asked Questions (FAQ)

Q: Are the 51940-035 and 51940-035LF electrically interchangeable?

A: Yes. Both parts share identical connector type, position count, pitch, contact layout, and operating specifications. Electrical performance and signal integrity are equivalent.

Q: What is the significance of the "LF" suffix in the 51940-035LF part number?

A: The "LF" designation indicates lead-free and RoHS-compliant construction. This reflects the manufacturing process and material composition rather than functional differences.

Q: Can the 51940-035LF be used as a direct replacement in existing assemblies designed for the 51940-035?

A: Yes. The parts are mechanically and electrically identical. PCB footprints, mounting holes, and contact positions are unchanged. No design modifications are required.

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

A: The 51940-035 packaging is not specified in available documentation. The 51940-035LF is supplied in tray packaging. Confirm packaging requirements with your procurement specification.

Q: Are there compliance considerations when transitioning from 51940-035 to 51940-035LF?

A: Yes. The 51940-035LF is RoHS compliant and REACH affected, meeting current regulatory standards. The obsolete 51940-035 is RoHS non-compliant. For applications subject to RoHS or REACH regulations, the 51940-035LF is the required choice.

Q: What is the current availability status of these parts?

A: The 51940-035 is obsolete with limited remaining inventory (804 pcs). The 51940-035LF is active production with current inventory (880 pcs). New designs should specify the 51940-035LF.