Amphenol ICC 51940-112 Equivalent & Substitute Parts

Part Overview

The Amphenol ICC 51940-112 is a backplane connector classified as a power receptacle with combined power and signal contacts. This connector is designed for through-hole PCB mounting and features 8 power positions and 48 signal positions in a blade power configuration. The part is currently listed as obsolete, which necessitates identification of functionally equivalent alternatives for ongoing system support and new designs requiring compatible interconnect solutions.

Substiute Parts

51940-112

Amphenol ICC (FCI)In Stock: 75851940-112 Datasheet

Current PartRFQ

51940-112LF

Amphenol ICC (FCI)In Stock: 102351940-112LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The substitute part 51940-112LF is identified as a direct equivalent based on the following substitution criteria:

Shared Base Product Number: Both the main part (51940-112) and substitute (51940-112LF) share the base product number 51940, indicating they belong to the same connector family and platform.

Connector Category & Style: Both are backplane connectors utilizing blade power configuration, ensuring mechanical and electrical compatibility within the same interconnect system.

Contact Configuration: Both parts maintain a combined power and signal contact layout (8 power positions, 28 signal positions in the substitute; 8 power, 48 signal in the main part). The substitute accommodates 36 total positions across 4 rows with 0.100" (2.54mm) pitch.

Mounting & Termination: Both employ through-hole mounting with solder termination, ensuring identical PCB integration methodology.

Contact Finish & Material: Both feature gold or gold GXT™ contact finish with UL94 V-0 flammability rating, meeting equivalent electrical and environmental performance standards.

Moisture Sensitivity: Both are rated MSL 1 (Unlimited), indicating no moisture sensitivity constraints.

Parameter Comparison

Engineering Selection Recommendations

The 51940-112LF serves as the active production equivalent to the obsolete 51940-112. Selection of the substitute part is supported by the following engineering factors:

Product Status Transition: The main part is obsolete, while the substitute is active in production. This status change reflects manufacturer support continuity within the 51940 connector family.

Compliance Improvement: The substitute achieves RoHS compliance, whereas the main part is RoHS non-compliant. For applications subject to RoHS regulations or customer requirements, the 51940-112LF is the appropriate selection.

Shared Electrical & Mechanical Platform: Both connectors operate within the same blade power connector architecture, ensuring compatibility with existing mating components and PCB layouts designed for the 51940 family.

Contact Configuration Consideration: The substitute provides 36 total positions (8 power, 28 signal) compared to the main part's 56 positions (8 power, 48 signal). System designs must accommodate this position reduction or utilize alternative connector configurations if full signal capacity is required.

Certification & Environmental Ratings: The substitute's documented operating temperature range (-20°C ~ 105°C) and UL94 V-0 flammability rating provide explicit performance boundaries suitable for industrial backplane applications.

Frequently Asked Questions (FAQ)

Q: Can the 51940-112LF directly replace the 51940-112 in existing designs?

A: Direct replacement is possible for applications where the reduced signal contact count (28 versus 48) is acceptable. Both connectors share the same base product number, blade power style, through-hole mounting, and MSL rating. PCB footprints and mating interfaces designed for the 51940 family are compatible. However, designs utilizing all 48 signal positions require evaluation of the 20-position reduction.

Q: What is the significance of the "LF" suffix in the part number 51940-112LF?

A: The "LF" suffix typically indicates a lead-free or RoHS-compliant variant within Amphenol ICC's naming convention. The 51940-112LF achieves RoHS compliance, whereas the original 51940-112 does not. This designation reflects the part's environmental and regulatory compliance status.

Q: Are there packaging differences between these parts?

A: The main part packaging is not specified in available documentation. The substitute is supplied in Tray packaging. Packaging format may affect procurement, handling, and assembly processes but does not impact electrical or mechanical compatibility.

Q: What contact finish options are available for the substitute?

A: The 51940-112LF offers gold or gold GXT™ contact finish with a thickness of 30.0µin (0.76µm). This finish specification ensures reliable electrical contact and corrosion resistance in backplane applications.

Q: Is the substitute suitable for high-temperature applications?

A: The 51940-112LF is rated for operating temperatures from -20°C to 105°C. Applications requiring operation outside this range require alternative connector selection or thermal management evaluation.

Q: How does the 4-row configuration of the substitute affect PCB layout?

A: The substitute's 36-position configuration is arranged in 4 rows with 0.100" (2.54mm) pitch. PCB designs must accommodate this row arrangement. Existing footprints designed for the main part's position count and layout require verification for compatibility.