CC56-11SRWA Equivalent & Substitute Parts

Part Overview

The CC56-11SRWA is a 4-character red 7-segment LED display module manufactured by Kingbright, designed for clock and numeric display applications. This component features a common cathode configuration with 0.56-inch character height and operates at 1.85V forward voltage with 20mA test current. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for new designs and production continuity.

Substiute Parts

CC56-11SRWA

KingbrightIn Stock: 672CC56-11SRWA Datasheet

Current PartRFQ

CC56-11SURKWA

KingbrightIn Stock: 788CC56-11SURKWA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CC56-11SRWA is determined by strict adherence to the following critical parameters:

Mandatory Matching Parameters:

• Number of Characters: 4
• Display Type: 7-Segment Clock
• Common Pin Configuration: Common Cathode
• Character Height: 0.56" (14.22mm)
• Physical Dimensions: 0.748" H x 1.980" W x 0.319" D
• Package Type: 36-DIP Module (0.600", 15.24mm)
• Color: Red
• Current - Test: 20mA
• Power Dissipation (Max): 75mW

Allowable Variation Parameters:

• Voltage - Forward (Vf): Tolerance within typical operating range
• Millicandela Rating: Variation acceptable within brightness specifications
• Wavelength - Peak: Variation within red spectrum acceptable

The CC56-11SURKWA qualifies as a direct substitute based on identical mechanical dimensions, package configuration, character count, display type, common cathode topology, test current, and maximum power dissipation. Variations in forward voltage (1.95V vs. 1.85V) and brightness characteristics (72mcd vs. 40mcd) remain within acceptable operational parameters for this component category.

Parameter Comparison

Engineering Selection Recommendations

The CC56-11SURKWA is the manufacturer-recommended substitute for the obsolete CC56-11SRWA. Selection of the CC56-11SURKWA is based on the following engineering criteria:

Product Status: The CC56-11SRWA is classified as obsolete, while the CC56-11SURKWA maintains active product status, ensuring long-term availability and supply chain continuity.

Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.

Mechanical Compatibility: Identical physical dimensions, package configuration (36-DIP), and pin count ensure direct PCB footprint compatibility without layout modifications.

Electrical Compatibility: The substitute part operates within acceptable parameters for this component category. The forward voltage increase from 1.85V to 1.95V represents a 5.4% variation, which is within typical design tolerances for LED display applications. The increased brightness rating (72mcd vs. 40mcd) provides enhanced visibility without exceeding maximum power dissipation limits (75mW).

Functional Equivalence: Both components share identical character count, display type, common cathode configuration, test current, and maximum power dissipation, confirming functional equivalence for clock and numeric display applications.

Frequently Asked Questions (FAQ)

Q: Can the CC56-11SURKWA be used as a direct replacement for the CC56-11SRWA without circuit modifications?

A: Yes. The CC56-11SURKWA is mechanically and electrically compatible with the CC56-11SRWA. Identical package configuration, pin count, physical dimensions, and test current specifications enable direct substitution. The forward voltage variation (1.95V vs. 1.85V) falls within acceptable operating tolerances for this component category.

Q: What is the significance of the forward voltage difference between the two parts?

A: The CC56-11SURKWA operates at 1.95V compared to the CC56-11SRWA at 1.85V, representing a 0.10V increase. This 5.4% variation is typical within LED display component families and does not require circuit redesign. Both parts maintain identical maximum power dissipation (75mW) and test current (20mA).

Q: Why does the CC56-11SURKWA have higher brightness (72mcd vs. 40mcd)?

A: The increased millicandela rating reflects improved LED die efficiency in the active substitute part. This enhancement provides superior display visibility while maintaining identical power dissipation limits, representing a performance improvement over the obsolete predecessor.

Q: Are the physical dimensions and package footprints identical?

A: Yes. Both the CC56-11SRWA and CC56-11SURKWA feature identical dimensions of 0.748" H x 1.980" W x 0.319" D (19.00mm x 50.30mm x 8.10mm) and use the same 36-DIP Module package with 0.600" (15.24mm) pin spacing. No PCB layout modifications are required.

Q: What is the difference in wavelength between the two parts?

A: The CC56-11SRWA operates at 660nm peak wavelength, while the CC56-11SURKWA operates at 645nm. Both wavelengths fall within the red spectrum and are visually indistinguishable in typical display applications. The wavelength variation reflects manufacturing improvements in the active substitute part.

Q: Are both parts RoHS compliant?

A: Yes. Both the CC56-11SRWA and CC56-11SURKWA are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: Why is the CC56-11SRWA classified as obsolete?

A: The CC56-11SRWA has reached end-of-life status in the manufacturer's product portfolio. The CC56-11SURKWA represents the active equivalent, offering improved performance characteristics while maintaining full compatibility with existing designs.