SC40-19SRWA 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The SC40-19SRWA is a 7-segment LED display module manufactured by Kingbright, featuring a single red character with 3.98" digit height in a 10-DIP package configuration. This component is classified as obsolete, indicating discontinued production status. Locating equivalent and substitute parts is necessary to support ongoing maintenance, repair, and new design requirements where this display module is specified or functionally required.

Substiute Parts

SC40-19SRWA

KingbrightIn Stock: 1036SC40-19SRWA Datasheet

Current PartRFQ

SC40-19SURKWA

KingbrightIn Stock: 852SC40-19SURKWA Datasheet

MFR RecommendedRFQ

XDMDK100C

SunLEDIn Stock: 873XDMDK100C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SC40-19SRWA are identified based on strict compatibility criteria within the 7-segment LED display category. The following parameters determine substitution eligibility:

Primary Compatibility Criteria:

• Display Type: 7-Segment (required match)
• Number of Characters: 1 (required match)
• Common Pin Configuration: Common Cathode (required match)
• Package / Case: 10-DIP (4.210", 107.00mm) (required match)
• Physical Dimensions: 4.803" H x 3.543" W x 0.591" D (required match)
• Digit/Alpha Size: 3.98" (101.20mm) (required match)
• Color: Red (required match)

Secondary Parameters (Allowable Variation):

• Voltage - Forward (Vf): Variation permitted within circuit design constraints
• Current - Test: Variation permitted based on driver capability
• Wavelength - Peak: Variation permitted within red spectrum (645nm–660nm)
• Millicandela Rating: Variation permitted based on brightness requirements
• Power Dissipation: Variation permitted based on thermal design

Two substitute parts meet these criteria: SC40-19SURKWA (Kingbright, manufacturer recommended) and XDMDK100C (SunLED, similar alternative).

Parameter Comparison

Engineering Selection Recommendations

SC40-19SURKWA (Kingbright - Manufacturer Recommended Substitute)

This part is the primary substitute option. It is manufactured by Kingbright, the original equipment manufacturer of the SC40-19SRWA, and carries active product status. All mechanical and electrical interface parameters are identical to the main part. The SC40-19SURKWA differs in forward voltage (3.9V vs. 7.4V), test current (20mA maintained), brightness (250mcd vs. 110mcd), and power dissipation (150mW vs. 600mW). These differences require circuit design evaluation but do not prevent substitution in applications where the lower voltage and reduced power consumption are compatible with existing driver circuits. RoHS3 compliance, unlimited moisture sensitivity rating, and REACH unaffected status match the original part.

XDMDK100C (SunLED - Similar Alternative)

This part provides an alternative from a different manufacturer. It maintains identical mechanical compatibility and 10-DIP package configuration. The XDMDK100C matches the original forward voltage (7.4V) and wavelength peak (645nm within red spectrum), supporting direct electrical compatibility in circuits designed for the SC40-19SRWA. Test current is reduced to 10mA, and brightness is lower at 74mcd. Power dissipation is reduced to 150mW. This part carries active product status and meets all compliance requirements (RoHS3, REACH unaffected, EAR99 classification). Selection of this part is appropriate where voltage compatibility is prioritized and lower brightness is acceptable.

Compliance and Regulatory Alignment

All substitute parts maintain RoHS3 compliance, unlimited moisture sensitivity rating (MSL 1), REACH unaffected status, and EAR99 export classification. No regulatory barriers exist to substitution.

Frequently Asked Questions (FAQ)

Q: Can SC40-19SURKWA be used as a direct replacement for SC40-19SRWA in existing circuits?

A: Mechanical and interface compatibility is complete. Electrical compatibility requires circuit evaluation. The SC40-19SURKWA operates at 3.9V forward voltage compared to 7.4V in the original part. If the circuit driver is capable of operating at the lower voltage with 20mA test current, substitution is feasible. If the circuit is designed specifically for 7.4V operation, circuit modification may be required.

Q: What are the brightness differences between the three parts?

A: SC40-19SRWA provides 110mcd at 7.4V and 20mA. SC40-19SURKWA provides 250mcd at 3.9V and 20mA, offering higher brightness at lower voltage. XDMDK100C provides 74mcd at 7.4V and 10mA, offering lower brightness with reduced current draw. Selection depends on application brightness requirements and circuit driver specifications.

Q: Are there packaging differences between the substitute parts?

A: Yes. SC40-19SURKWA is supplied in Tube packaging, while XDMDK100C is supplied in Box packaging. Both use the identical 10-DIP (4.210", 107.00mm) package case. Packaging format does not affect electrical or mechanical compatibility but may influence procurement, handling, and storage procedures.

Q: Do all parts meet the same compliance standards?

A: Yes. SC40-19SRWA, SC40-19SURKWA, and XDMDK100C are all RoHS3 compliant, REACH unaffected, and classified as EAR99 for export purposes. Moisture sensitivity level is 1 (unlimited) for all three parts. No compliance barriers exist to substitution.

Q: What is the wavelength difference between the parts?

A: SC40-19SRWA has a peak wavelength of 660nm (standard red). SC40-19SURKWA and XDMDK100C both have peak wavelengths of 645nm (red-orange spectrum). Both wavelengths fall within the red LED category and are visually compatible for most applications. Wavelength selection depends on specific color matching requirements in the end application.

Q: Which substitute part should be selected for new designs?

A: SC40-19SURKWA is recommended for new designs as it is manufactured by Kingbright (the original equipment manufacturer) and carries active product status. It offers improved brightness (250mcd) and reduced power dissipation (150mW) compared to the obsolete SC40-19SRWA. XDMDK100C is a secondary option where voltage compatibility with existing 7.4V circuits is required and lower brightness is acceptable.