SI-B8U521B2CUS LED Module Equivalent & Substitute Parts

Part Overview

The SI-B8U521B2CUS is a Samsung Semiconductor LED Module classified as an LED Lighting COB Engine Module, specifically a linear light strip configuration with warm white color temperature (3500K). This component is designated as Obsolete in product status. The module delivers 7488 lumens at rated test conditions (1.12A, 65°C) with a forward voltage of 48.8V and efficiency of 137 lm/W. Due to its obsolete classification, equivalent substitute parts are necessary for ongoing design support, production continuity, and system integration in applications requiring compatible linear LED strip modules with matching optical and electrical characteristics.

Substiute Parts

SI-B8U521B2CUS

Samsung Semiconductor, Inc.In Stock: 1221SI-B8U521B2CUS Datasheet

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SI-B8U463B20WW

Samsung Semiconductor, Inc.In Stock: 894SI-B8U463B20WW Datasheet

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SI-B8U522B2CUS

Samsung Semiconductor, Inc.In Stock: 1035SI-B8U522B2CUS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SI-B8U521B2CUS is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Configuration: Linear Light Strip (mandatory match)
• Color: White, Warm (mandatory match)
• CCT: 3500K (mandatory match)
• CRI: 80 (mandatory match)
• Lens Type: Flat (mandatory match)
• Base Product Number: SI-B8 (mandatory match)
• Dimensions: 1120mm L × 18mm W (mandatory match)
• Compliance: ECCN EAR99, HTSUS 8541.41.0000 (mandatory match)

Secondary Compatibility Parameters:

• Voltage – Forward (Vf): Acceptable range 45–50V for direct circuit integration
• Current – Test: Acceptable range 1.0–1.2A for standard driver compatibility
• Luminous Flux: Acceptable range 7150–8410 lm for equivalent light output
• Lumens per Watt: Acceptable range 137–169 lm/W for efficiency equivalence

Two substitute parts meet these criteria: SI-B8U463B20WW and SI-B8U522B2CUS. Both share the SI-B8 base product number, identical physical dimensions, matching color temperature, CRI, and compliance classifications. Variations in height, forward voltage, current characteristics, and efficiency are within acceptable engineering tolerances for linear LED strip module substitution.

Parameter Comparison

Engineering Selection Recommendations

SI-B8U463B20WW (V Series Gen3) – Primary Substitute:

This substitute is classified as Active product status, ensuring long-term availability and manufacturing support. It delivers superior efficiency at 169 lm/W compared to the main part's 137 lm/W, with marginally higher luminous flux (7680 lm vs. 7488 lm) at a lower test current (1.01A vs. 1.12A). Forward voltage is 45V, which is 3.8V lower than the main part, requiring circuit verification for driver compatibility. The reduced height (3.70mm vs. 5.50mm) may affect mechanical fit in space-constrained applications. Maximum current rating is 2.02A, providing greater operational headroom. This part is suitable for new designs and production continuity where active product status is required.

SI-B8U522B2CUS (V-Series Gen2) – Secondary Substitute:

This substitute shares identical height (5.50mm) and test current (1.12A) with the main part, minimizing mechanical and electrical integration changes. It delivers higher luminous flux (8410 lm) and superior efficiency (161 lm/W). Forward voltage is 46.5V, within acceptable tolerance of the main part's 48.8V. Product status is Obsolete, matching the main part's classification. MSL rating is 1 (Unlimited), providing enhanced moisture protection during storage and handling. This part is suitable for direct replacement in existing production lines where mechanical and electrical compatibility with the original design is prioritized.

Both substitutes comply with identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, ensuring regulatory equivalence. Selection between these substitutes depends on design priorities: SI-B8U463B20WW for active product status and efficiency optimization; SI-B8U522B2CUS for mechanical compatibility and higher light output.

Frequently Asked Questions (FAQ)

Q1: Can SI-B8U463B20WW be used as a direct replacement for SI-B8U521B2CUS without circuit modification?

A: SI-B8U463B20WW has a forward voltage of 45V compared to 48.8V for the main part. This 3.8V difference requires driver circuit verification. If the driver is voltage-regulated, substitution is feasible. If the driver is current-regulated, substitution is direct. Physical height differs (3.70mm vs. 5.50mm), requiring mechanical fit assessment.

Q2: What is the primary advantage of SI-B8U463B20WW over the main part?

A: SI-B8U463B20WW offers 23% higher efficiency (169 lm/W vs. 137 lm/W) and Active product status, ensuring long-term supply availability. It delivers equivalent light output at lower current draw.

Q3: Why is SI-B8U522B2CUS listed as a substitute if it is also Obsolete?

A: SI-B8U522B2CUS is Obsolete but currently has 1001 pieces in stock inventory. It provides a viable short-term substitute with identical mechanical dimensions and test current, minimizing design changes. For long-term production, SI-B8U463B20WW (Active status) is preferred.

Q4: Are there packaging differences between the substitutes?

A: Yes. SI-B8U521B2CUS is packaged in bulk. SI-B8U463B20WW is packaged in trays. SI-B8U522B2CUS is packaged in bulk. Packaging affects handling, storage, and logistics but does not affect electrical or optical performance.

Q5: Can these substitutes be used interchangeably in the same circuit?

A: No. Forward voltage differences (45V, 46.5V, 48.8V) require driver circuit compatibility verification. Current ratings differ (1.62A, 2.02A, 1.35A maximum), affecting thermal management and power supply sizing. Mechanical height variations (3.70mm, 5.50mm) may affect thermal interface and mechanical mounting.

Q6: What is the significance of the 3500K CCT specification?

A: 3500K is the correlated color temperature, defining the warm white appearance of the light. All three parts (main and substitutes) are specified at 3500K, ensuring identical color appearance in the application. This is a mandatory matching criterion for substitution.

Q7: How does the CRI of 80 affect substitution eligibility?

A: CRI (Color Rendering Index) of 80 indicates the accuracy of color reproduction. All three parts have CRI 80, meeting the same color fidelity standard. This is a mandatory matching criterion for substitution in applications requiring consistent color rendering.

Q8: What does the viewing angle specification mean for SI-B8U463B20WW?

A: SI-B8U463B20WW specifies a viewing angle of 118°, indicating the angular range over which light output remains above 50% of peak intensity. The main part and SI-B8U522B2CUS do not specify viewing angle. This parameter does not affect substitution eligibility but may influence optical system design.

Q9: Are there compliance or export restrictions affecting these substitutes?

A: All three parts share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, indicating equivalent export control and tariff treatment. No additional compliance barriers exist for substitution.

Q10: Which substitute should be selected for a new product design?

A: SI-B8U463B20WW is recommended for new designs due to Active product status, ensuring supply continuity beyond the typical product lifecycle. Its superior efficiency (169 lm/W) reduces power consumption and thermal load. Circuit design must accommodate the 45V forward voltage specification.