SC43-11SRWA Equivalent & Substitute Parts

Part Overview

The SC43-11SRWA is a 7-segment LED display module manufactured by Kingbright, featuring a single red character with 0.43" digit height in a 14-DIP package configuration. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The display operates as a common cathode device with a forward voltage of 1.85V and test current of 20mA, delivering 42mcd brightness at a 660nm wavelength.

Due to its obsolete status, sourcing direct replacements from current production inventory requires evaluation of substitute components that maintain electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

SC43-11SRWA

KingbrightIn Stock: 713SC43-11SRWA Datasheet

Current PartRFQ

LDS-C416RI

Lumex Opto/Components Inc.In Stock: 1648LDS-C416RI Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the SC43-11SRWA is determined by the following critical parameters:

Primary Compatibility Criteria:

• Display Type: 7-Segment configuration
• Number of Characters: Single character (1)
• Digit/Alpha Size: 0.43" (10.92mm)
• Common Pin Configuration: Common Cathode
• Color: Red
• Wavelength - Peak: 660nm
• Package / Case: 14-DIP

Secondary Electrical Parameters:

• Voltage - Forward (Vf): Operating range tolerance
• Current - Test: Operating current specification
• Millicandela Rating: Brightness output
• Power Dissipation (Max): Thermal characteristics

The LDS-C416RI from Lumex Opto/Components Inc. satisfies all primary compatibility criteria. This substitute maintains identical display type, character count, digit size, common cathode configuration, red color, and 14-DIP package structure. Secondary electrical parameters remain within acceptable operational ranges for direct substitution in circuit designs originally specified for the SC43-11SRWA.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: LDS-C416RI

The LDS-C416RI is the qualified substitute for the obsolete SC43-11SRWA. Selection rationale is based on the following engineering factors:

Compliance and Regulatory Status: Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in production environments. The LDS-C416RI carries active product status from Lumex Opto/Components Inc., providing assured long-term availability compared to the obsolete SC43-11SRWA.

Mechanical Compatibility: Dimensional specifications are functionally equivalent. The LDS-C416RI measures 0.748" H x 0.496" W x 0.307" D versus the original 0.748" H x 0.496" W x 0.310" D, representing a 0.07mm depth variation within acceptable PCB assembly tolerances. Both components utilize 14-DIP package configuration with identical lead spacing and footprint compatibility.

Electrical Compatibility: Forward voltage differential of 0.05V (1.85V versus 1.8V) falls within standard circuit design margins for LED display applications. Test current specification of 10mA for the LDS-C416RI versus 20mA for the SC43-11SRWA indicates lower power consumption, reducing thermal load in the substitute component. This parameter difference is compatible with existing current-limiting resistor designs when properly evaluated.

Brightness Consideration: The LDS-C416RI delivers 9.8mcd versus the original 42mcd. This represents a significant brightness reduction. Applications requiring the original brightness specification must evaluate whether the substitute meets visual performance requirements in the intended operating environment.

Frequently Asked Questions (FAQ)

Q: Can the LDS-C416RI directly replace the SC43-11SRWA without circuit modification?

A: The LDS-C416RI is mechanically and electrically compatible for direct substitution in 14-DIP socket applications. Both components share identical common cathode configuration, 0.43" digit height, and 660nm wavelength. Forward voltage difference of 0.05V is within standard design tolerance. However, the reduced brightness specification (9.8mcd versus 42mcd) must be evaluated against application visibility requirements.

Q: What is the significance of the current specification difference (20mA versus 10mA)?

A: The test current specification indicates the current level at which the brightness rating is measured. The LDS-C416RI operates at lower test current, resulting in reduced power dissipation. Existing circuit designs using current-limiting resistors for the SC43-11SRWA will function with the LDS-C416RI; however, actual brightness output will differ due to the lower millicandela rating, not the test current specification alone.

Q: Are both components suitable for new design implementations?

A: The SC43-11SRWA is classified as obsolete and unsuitable for new designs. The LDS-C416RI carries active product status and is the appropriate selection for new design implementations requiring a single-character, 0.43" red 7-segment display in 14-DIP package configuration.

Q: Do both components meet current regulatory requirements?

A: Yes. Both the SC43-11SRWA and LDS-C416RI are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic component manufacturing and distribution.

Q: What is the physical footprint compatibility between these components?

A: Both components utilize 14-DIP package configuration with 0.300" (7.62mm) lead spacing. Dimensional height and width are identical (0.748" x 0.496"). Depth variation of 0.07mm (7.87mm versus 7.80mm) is negligible for standard PCB assembly processes and does not affect socket or through-hole compatibility.

Q: Can the LDS-C416RI be used in applications where maximum brightness is critical?

A: The LDS-C416RI brightness rating of 9.8mcd is substantially lower than the SC43-11SRWA specification of 42mcd. Applications with brightness-critical requirements must evaluate whether the substitute meets minimum visibility thresholds in the intended operating environment, lighting conditions, and viewing distance specifications.