LDS-A3912RI Equivalent & Substitute Parts

Part Overview

The LDS-A3912RI is a single-character 7-segment LED display module manufactured by Lumex Opto/Components Inc. This green display operates with common anode configuration and is housed in a 10-DIP package. The device is classified as Active product status and maintains full RoHS3 compliance. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for 7-segment display applications.

Substiute Parts

LDS-A3912RI

Lumex Opto/Components Inc.In Stock: 854LDS-A3912RI Datasheet

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SA36-11CGKWA

KingbrightIn Stock: 1507SA36-11CGKWA Datasheet

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SA36-11GWA

KingbrightIn Stock: 998SA36-11GWA Datasheet

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SA39-12GWA

KingbrightIn Stock: 1417SA39-12GWA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LDS-A3912RI are qualified based on the following criteria:

Primary Compatibility Criteria:

• Display Type: 7-Segment configuration
• Common Pin: Common Anode
• Color: Green
• Package: 10-DIP
• Product Status: Active
• RoHS3 Compliance: Required

Electrical Parameter Tolerance:

• Forward Voltage (Vf): 2.1V to 2.2V
• Wavelength - Peak: 565nm to 574nm
• Common Anode configuration ensures pin-level compatibility

Mechanical Compatibility:

• 10-DIP package footprint compatibility
• Physical dimensions must accommodate PCB layout constraints

Substitutes are grouped into two categories based on digit size alignment: 0.36" (9.14mm) size variants and 0.39" (10.00mm) size variants. The 0.39" variants provide direct mechanical and electrical substitution. The 0.36" variants provide electrical substitution with minor dimensional differences.

Parameter Comparison

Engineering Selection Recommendations

SA39-12GWA (Kingbright) - Direct Mechanical and Electrical Substitute

The SA39-12GWA provides the closest substitution profile for the LDS-A3912RI. Both devices share identical digit size (0.39"), physical dimensions (0.512" H x 0.394" W x 0.276" D), package type (10-DIP 0.300"), forward voltage (2.2V), and wavelength peak (565nm). Both maintain Active product status and ROHS3 compliance. The SA39-12GWA operates at 20mA test current versus the LDS-A3912RI's 10mA, resulting in lower maximum power dissipation (62.5mW vs 105mW). This substitute is suitable for direct PCB layout replacement without modification.

SA36-11GWA (Kingbright) - Electrical Substitute with Dimensional Variance

The SA36-11GWA maintains electrical compatibility through matching forward voltage (2.2V) and wavelength peak (565nm). Common anode configuration and 7-segment display type ensure pin-level compatibility. However, the digit size is reduced to 0.36" (9.14mm) and physical dimensions differ (0.551" H x 0.295" W x 0.335" D). The 10-DIP package footprint differs (0.200" vs 0.300" pitch). This substitute requires PCB layout verification and is suitable only when dimensional constraints permit.

SA36-11CGKWA (Kingbright) - Electrical Substitute with Wavelength Variance

The SA36-11CGKWA provides electrical substitution with forward voltage of 2.1V (within tolerance range) and wavelength peak of 574nm (within green spectrum range). Common anode configuration and 7-segment display type maintain pin-level compatibility. Digit size is 0.36" (9.14mm) with physical dimensions of 0.551" H x 0.295" W x 0.335" D. The 10-DIP package footprint differs (0.200" vs 0.300" pitch). This substitute requires PCB layout verification and wavelength acceptance confirmation.

All substitute parts maintain Active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the main part.

Frequently Asked Questions (FAQ)

Q: Can SA39-12GWA be used as a direct replacement for LDS-A3912RI without PCB modification?

A: Yes. The SA39-12GWA shares identical physical dimensions (0.512" H x 0.394" W x 0.276" D), digit size (0.39"), and 10-DIP package pitch (0.300", 7.62mm). Both devices operate at 2.2V forward voltage with 565nm wavelength peak. No PCB layout modification is required.

Q: What is the difference between SA36-11GWA and SA36-11CGKWA?

A: Both devices share 0.36" digit size and identical physical dimensions. SA36-11GWA operates at 2.2V forward voltage with 565nm wavelength peak and 3.5mcd brightness. SA36-11CGKWA operates at 2.1V forward voltage with 574nm wavelength peak and 11mcd brightness. The wavelength difference places SA36-11CGKWA at the longer wavelength end of the green spectrum.

Q: Can 0.36" digit size displays (SA36-11GWA, SA36-11CGKWA) replace the 0.39" main part?

A: Electrical substitution is possible due to matching common anode configuration and compatible forward voltage ranges. However, mechanical substitution requires PCB layout verification. The 0.36" digit size is smaller, and the 10-DIP package pitch differs (0.200" vs 0.300"). Visual appearance and PCB footprint compatibility must be confirmed before implementation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (SA39-12GWA, SA36-11GWA, SA36-11CGKWA) maintain ROHS3 compliance equivalent to the LDS-A3912RI main part.

Q: What is the significance of the 10mA vs 20mA test current difference?

A: The LDS-A3912RI specifies 10mA test current with 105mW maximum power dissipation. Substitute parts specify 20mA test current with lower maximum power dissipation (62.5mW to 75mW). This indicates different brightness rating methodologies. Actual circuit current requirements depend on application design and are not constrained by these test specifications.

Q: Can wavelength differences between 565nm and 574nm affect visual appearance?

A: Both wavelengths fall within the green spectrum range. 565nm represents peak green, while 574nm represents yellow-green. Visual perception difference depends on application context and observer sensitivity. For applications requiring consistent color matching across multiple displays, wavelength alignment should be verified.