Amphenol ICC 51940-177 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-177 is a 4-position receptacle connector featuring female blade sockets for power distribution applications. This connector utilizes press-fit termination and through-hole mounting on printed circuit boards. The part is classified as obsolete, necessitating identification of active equivalent components to maintain supply chain continuity for new designs and production requirements.

Substiute Parts

51940-177

Amphenol ICC (FCI)In Stock: 106451940-177 Datasheet

Current PartRFQ

51940-177LF

Amphenol ICC (FCI)In Stock: 111851940-177LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 51940-177 is determined by strict equivalence across the following critical parameters:

• Connector Type & Style: Receptacle with female blade sockets in blade power configuration
• Position Count & Pitch: 4 positions at 0.300" (7.62mm) spacing
• Mounting & Termination: Through-hole mounting with press-fit termination
• Contact Properties: Gold or Gold, GXT™ finish at 30.0µin thickness
• Environmental Ratings: UL94 V-0 flammability and -20°C ~ 105°C operating range
• Series Designation: PwrBlade® series classification

The substitute part 51940-177LF maintains complete electrical and mechanical compatibility with the original specification while offering improved compliance status and active product availability.

Parameter Comparison

Engineering Selection Recommendations

The 51940-177LF is the direct functional equivalent of the 51940-177 for all electrical and mechanical applications. Selection between these parts is determined by regulatory and supply chain requirements:

Use 51940-177LF for new designs and production due to active product status and RoHS compliance certification. This part eliminates obsolescence risk and satisfies modern regulatory requirements including RoHS and REACH compliance.

The 51940-177 remains suitable only for legacy system maintenance where existing inventory is available and regulatory compliance is not a requirement.

Both parts are identical in connector geometry, contact configuration, termination method, and environmental performance specifications.

Frequently Asked Questions (FAQ)

Q: Are the 51940-177 and 51940-177LF mechanically interchangeable?

A: Yes. Both parts share identical connector type, position count, pitch, mounting method, and termination technology. PCB layouts and mating components designed for one part function identically with the other.

Q: What is the primary difference between these parts?

A: The 51940-177LF is RoHS compliant and maintains active product status, while the 51940-177 is obsolete and RoHS non-compliant. Electrical and mechanical specifications are equivalent.

Q: Can I use the 51940-177LF as a direct replacement in existing assemblies?

A: Yes. The 51940-177LF provides complete functional equivalence and is suitable for retrofit applications without design modification.

Q: What packaging is supplied for each part?

A: The 51940-177 packaging specification is not provided. The 51940-177LF is supplied in tray packaging.

Q: Are there any compliance differences I should consider?

A: The 51940-177LF is RoHS compliant and REACH affected, while the 51940-177 is RoHS non-compliant. For applications subject to RoHS or REACH regulations, the 51940-177LF is the required selection.

Q: Do both parts support the same operating temperature range?

A: Yes. Both parts operate across -20°C to 105°C with identical UL94 V-0 flammability rating and moisture sensitivity level.