Cinch Connectivity Solutions 51C Terminal Lug Strip Equivalent & Substitute Parts

Part Overview

The Cinch Connectivity Solutions 51C is a 2-position terminal lug strip with single-end terminal lugs and integrated ground position. This component is classified as obsolete, making equivalent substitutes necessary for ongoing system maintenance and new design implementations. The 51C provides a compact solution for single-row terminal lug applications with a board footprint of 0.375" W x 0.625" H and cadmium-plated steel contacts on an XPC phenolic board.

Substiute Parts

51C

Cinch Connectivity SolutionsIn Stock: 92651C Datasheet

Current PartRFQ

803

Keystone ElectronicsIn Stock: 1520803 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 51C is determined by the following critical parameters that must remain functionally equivalent:

• Terminal Configuration: 2-position terminal lug strip with single-end terminal lugs and integrated ground position
• Number of Rows: Single row configuration
• Mounting Hole Diameter: 0.140" (4.66mm) for mechanical compatibility
• Terminal Type: Terminal lug, single end for direct connection applications
• Board Material Compatibility: Phenolic-based materials (XPC or XP Phenolic) maintain electrical and mechanical properties

The Keystone Electronics 803 satisfies these core substitution criteria. While board dimensions differ (0.750" L x 0.375" W x 0.062" H versus 0.375" W x 0.625" H), the functional terminal configuration, mounting hole diameter, and single-row layout remain compatible for equivalent circuit applications. Contact material and finish differ (brass with tin plating versus steel with cadmium plating), which may affect corrosion resistance and current-carrying characteristics in specific environments.

Parameter Comparison

Engineering Selection Recommendations

The Keystone Electronics 803 serves as the primary substitute for the obsolete Cinch 51C. Selection between these components depends on regulatory and environmental requirements:

Use Keystone 803 when:

• RoHS3 compliance is required for new designs or updated systems
• Active product support and ongoing availability are necessary
• Tin-plated brass contacts are acceptable for the application environment

Retain Cinch 51C when:

• Legacy systems require exact component matching for certification or validation purposes
• Cadmium-plated steel contacts are specified for particular corrosion or electrical performance characteristics
• RoHS non-compliance does not conflict with system requirements

Both components share identical mounting hole diameter (0.140"), terminal configuration (2-position single-end lug strip), and moisture sensitivity rating (MSL 1), ensuring mechanical and environmental compatibility. Board dimension differences require verification against PCB layout constraints.

Frequently Asked Questions (FAQ)

Q: Can the Keystone 803 directly replace the Cinch 51C in existing assemblies?

A: Mechanical compatibility is confirmed through matching mounting hole diameter (0.140") and terminal lug configuration. However, board dimensions differ, requiring verification that the larger 803 footprint (0.750" L x 0.375" W) accommodates existing PCB layouts. Contact material and finish differences (brass/tin versus steel/cadmium) may affect performance in corrosive environments.

Q: What are the key differences between these two parts?

A: Primary differences include product status (obsolete versus active), RoHS compliance (non-compliant versus ROHS3 compliant), contact material (steel versus brass), contact finish (cadmium versus tin), and board dimensions. Functional terminal configuration and mounting specifications remain equivalent.

Q: Does the Keystone 803 meet current regulatory requirements?

A: The Keystone 803 is ROHS3 compliant and REACH unaffected, meeting current regulatory standards for new designs. The Cinch 51C is RoHS non-compliant and suitable only for legacy system maintenance.

Q: Are there packaging differences between these parts?

A: The Cinch 51C is packaged as standard strip, while the Keystone 803 is supplied in bulk packaging. Inventory availability differs (821 pcs for 51C versus 1468 pcs for 803).

Q: How do contact material differences affect substitution?

A: Steel with cadmium plating (51C) and brass with tin plating (803) exhibit different corrosion resistance and electrical properties. Selection depends on application environment, current requirements, and contact resistance specifications not provided in this comparison.