DA03-11EWA Equivalent & Substitute Parts Reference

Part Overview

The DA03-11EWA is a 7-segment LED display module manufactured by Kingbright, featuring a dual-character red display in a 10-DIP package. This component is classified as an active product and is fully compliant with RoHS3 and REACH regulations. The display operates at 2V forward voltage with a 20mA test current and delivers 3.1mcd brightness at a peak wavelength of 627nm.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in circuit applications. Substitution becomes necessary due to inventory availability, supply chain considerations, or design optimization requirements while maintaining functional compatibility.

Substiute Parts

DA03-11EWA

KingbrightIn Stock: 1112DA03-11EWA Datasheet

Current PartRFQ

LDD-E304NI

Lumex Opto/Components Inc.In Stock: 1605LDD-E304NI Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DA03-11EWA is determined by strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Number of Characters: 2
• Display Type: 7-Segment
• Common Pin Configuration: Common Anode
• Color: Red
• Digit/Alpha Size: 0.30" (7.62mm)
• Physical Dimensions: 0.591" H × 0.610" W × 0.283" D (15.00mm × 15.50mm × 7.20mm)
• Package Type: 10-DIP (0.400", 10.16mm)
• Voltage - Forward (Vf) Typical: 2V

Allowable Parameter Variations: Substitute parts may differ in the following parameters while maintaining functional compatibility:

• Current - Test: Variation permitted within circuit design constraints
• Millicandela Rating: Variation permitted based on application brightness requirements
• Wavelength - Peak: Variation permitted within red spectrum range
• Power Dissipation (Max): Variation permitted based on thermal design

The LDD-E304NI qualifies as a substitute part based on matching all mandatory parameters while exhibiting allowable variations in current, brightness, wavelength, and power dissipation specifications.

Parameter Comparison

Engineering Selection Recommendations

DA03-11EWA (Kingbright) is recommended for applications requiring:

• Higher brightness output (3.1mcd vs. 2mcd)
• Lower wavelength specification (627nm red vs. 635nm)
• Standard test current operation (20mA)
• Lower maximum power dissipation (75mW)

LDD-E304NI (Lumex Opto/Components Inc.) is recommended for applications requiring:

• Lower current consumption (10mA vs. 20mA)
• Reduced power dissipation in thermal-constrained designs
• Longer wavelength red spectrum (635nm)
• Alternative sourcing or inventory availability

Both parts maintain full compliance with RoHS3 and REACH regulations. Both are classified as active products with unlimited moisture sensitivity rating (MSL 1). Selection between these parts should be based on specific circuit current requirements, brightness specifications, and supply chain considerations. No additional testing or verification is required for direct substitution when all mandatory parameters align.

Frequently Asked Questions (FAQ)

Q: Can the LDD-E304NI directly replace the DA03-11EWA in existing circuit designs?

A: Yes. Both parts share identical mandatory parameters: 2-character 7-segment common anode red display, 0.30" digit size, matching physical dimensions, 10-DIP package, and 2V forward voltage. The LDD-E304NI operates at 10mA test current versus 20mA for the DA03-11EWA, which may reduce power consumption in the circuit. Brightness and wavelength differences fall within allowable variation ranges for red LED displays.

Q: What is the significance of the wavelength difference (627nm vs. 635nm)?

A: Both wavelengths fall within the red spectrum range. The DA03-11EWA operates at 627nm (standard red), while the LDD-E304NI operates at 635nm (deep red). This difference is perceptually minimal in most applications and does not affect functional compatibility or circuit operation.

Q: Why does the LDD-E304NI have lower brightness (2mcd vs. 3.1mcd)?

A: The brightness difference reflects different LED chip specifications between manufacturers. The LDD-E304NI's lower brightness rating is offset by its lower test current (10mA vs. 20mA), resulting in reduced power consumption. Application brightness requirements determine whether this variation is acceptable.

Q: Are there any package differences between these parts?

A: Both parts use 10-DIP (0.400", 10.16mm) packaging with identical physical dimensions. The LDD-E304NI specification notes "9 Leads," which refers to the functional lead count within the 10-pin package. This does not affect PCB footprint or mechanical compatibility.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the DA03-11EWA and LDD-E304NI are RoHS3 compliant and REACH unaffected. Both carry MSL 1 (Unlimited) moisture sensitivity rating, indicating no special storage or handling requirements.

Q: Which part should be selected for battery-powered applications?

A: The LDD-E304NI is preferable for battery-powered designs due to its lower test current (10mA vs. 20mA), resulting in reduced power consumption and extended battery life. The lower maximum power dissipation (105mW vs. 75mW specification) reflects the reduced operating current.

Q: Can these parts be used interchangeably in high-brightness applications?

A: The DA03-11EWA is better suited for high-brightness requirements due to its 3.1mcd rating versus the LDD-E304NI's 2mcd rating. If brightness is a critical specification, the DA03-11EWA should be selected. The LDD-E304NI is suitable for standard-brightness applications.