Amphenol ICC 51940-149 Backplane Connector - Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-149 is a 26-position receptacle connector featuring female sockets and blade sockets for through-hole PCB mounting in blade power applications. This connector is part of the PwrBlade® series and provides a 4-row configuration with 24 signal and 2 power contacts. The main part is currently obsolete, making identification of active equivalent parts essential for ongoing production and maintenance applications requiring this connector type.

Substiute Parts

51940-149

Amphenol ICC (FCI)In Stock: 89951940-149 Datasheet

Current PartRFQ

51940-149LF

Amphenol ICC (FCI)In Stock: 75851940-149LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 51940-149LF is a direct functional equivalent of the 51940-149. Substitution is valid based on identical electrical and mechanical parameters: both connectors share the same 26-position receptacle configuration, 0.100" pitch, 4-row layout, through-hole mounting, solder termination, and contact specifications. The primary distinction is product status and compliance: the 51940-149 is obsolete, while the 51940-149LF is active production. The 51940-149LF also carries RoHS compliance and REACH affected status, whereas the original part is RoHS non-compliant. Packaging differs (the substitute is supplied in Tray format versus unspecified packaging for the main part), but this does not affect functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

The 51940-149LF is the appropriate selection for new designs and production applications. This part maintains full electrical and mechanical compatibility with the obsolete 51940-149 while offering active product status and RoHS compliance. For legacy systems currently using the 51940-149, direct substitution with the 51940-149LF is valid without design modification. The RoHS compliant status of the 51940-149LF aligns with current regulatory requirements in most markets. Both parts carry identical UL94 V-0 flammability ratings and operate across the same temperature range, ensuring thermal and safety performance equivalence.

Frequently Asked Questions (FAQ)

Q: Can the 51940-149LF directly replace the 51940-149 in existing assemblies?

A: Yes. Both connectors are electrically and mechanically identical in all functional parameters: 26-position receptacle configuration, 0.100" pitch, 4-row layout, through-hole solder termination, and contact specifications. No PCB redesign or assembly modification is required.

Q: What is the significance of the "LF" suffix in the part number 51940-149LF?

A: The "LF" designation indicates lead-free construction and RoHS compliance. This reflects the part's compliance with the Restriction of Hazardous Substances directive, distinguishing it from the non-compliant original part.

Q: Does packaging format affect connector performance or compatibility?

A: No. The 51940-149LF is supplied in Tray packaging, while the original part's packaging is unspecified. Packaging format does not affect electrical performance, mechanical fit, or functional compatibility. Packaging selection is driven by handling, storage, and logistics requirements.

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

A: No. Both connectors operate across the identical temperature range of -20°C to 105°C and carry the same UL94 V-0 flammability rating. Moisture sensitivity level is identical at MSL 1 (Unlimited), indicating no moisture-related handling restrictions.

Q: Why is the original 51940-149 marked as obsolete?

A: The 51940-149 is obsolete due to its RoHS non-compliant status. The 51940-149LF represents the active production equivalent that meets current regulatory and compliance standards while maintaining full functional equivalence.