LED Module SI-B8T521B2CUS Equivalent & Substitute Parts

Part Overview

The SI-B8T521B2CUS is a Samsung Semiconductor LED Module classified as an LED Lighting COB Engine Module, specifically a white neutral linear light strip operating at 4000K color temperature. This component is designated as Obsolete product status. The LT-VB22F series module delivers 7816 lumens at nominal test conditions with a forward voltage of 48.8V and efficiency of 143 lumens per watt. Due to obsolescence, equivalent substitute parts from the SI-B8 base product family are available to maintain design compatibility and supply continuity.

Substiute Parts

SI-B8T521B2CUS

Samsung Semiconductor, Inc.In Stock: 1220SI-B8T521B2CUS Datasheet

Current PartRFQ

SI-B8T463B20WW

Samsung Semiconductor, Inc.In Stock: 1078SI-B8T463B20WW Datasheet

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SI-B8T522B2CUS

Samsung Semiconductor, Inc.In Stock: 912SI-B8T522B2CUS Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SI-B8T521B2CUS are selected based on strict compatibility criteria within the SI-B8 base product family. The primary substitution parameters are:

Critical Matching Parameters:

• Base Product Number: SI-B8 (all substitutes share this designation)
• Configuration: Linear Light Strip (maintained across all alternatives)
• Color: White, Neutral (consistent specification)
• CCT: 4000K (identical color temperature)
• Dimensions: 1120 mm length × 18 mm width (physical form factor match)
• CRI: 80 (color rendering index maintained)
• Manufacturer: Samsung Semiconductor, Inc.
• Compliance: ECCN EAR99, HTSUS 8541.41.0000 (regulatory alignment)

Allowable Variation Parameters:

• Luminous Flux: Substitutes may vary within operational range
• Forward Voltage (Vf): Acceptable variation within power supply design margins
• Current ratings: Test and maximum current may differ based on series generation
• Height: Minor dimensional variation (5.50 mm vs. 3.70 mm) acceptable for retrofit applications
• Lumens/Watt efficiency: Improved efficiency in newer generations
• Product Status: Active status preferred over obsolete for new designs
• Viewing Angle: Specification may be present or absent depending on series

Substitutes SI-B8T463B20WW and SI-B8T522B2CUS meet these criteria and are classified as equivalent alternatives.

Parameter Comparison

Engineering Selection Recommendations

For Obsolescence Mitigation:

The SI-B8T521B2CUS is classified as Obsolete. The SI-B8T463B20WW is the primary recommended substitute, as it carries Active product status and ensures long-term supply availability. This part is suitable for new designs and production continuity.

For Existing Design Compatibility:

The SI-B8T522B2CUS provides direct dimensional and electrical compatibility with the original SI-B8T521B2CUS, maintaining identical height (5.50 mm) and test current (1.12 A). However, this part is also Obsolete and should be considered only for short-term replacement needs.

Electrical Compatibility Considerations:

All three parts operate at 4000K with CRI 80 and identical physical length and width. Forward voltage varies between 45 V and 48.8 V; power supply designs must accommodate this range. The SI-B8T463B20WW operates at lower forward voltage (45 V) and lower test current (1.01 A), resulting in improved efficiency (176 lm/W). The SI-B8T522B2CUS delivers higher luminous flux (8690 lm) at identical test current to the main part.

Regulatory and Compliance Status:

All parts share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications, ensuring consistent export and tariff treatment.

Frequently Asked Questions (FAQ)

Q: Can SI-B8T463B20WW be used as a direct replacement for SI-B8T521B2CUS?

A: SI-B8T463B20WW is electrically and mechanically compatible within the SI-B8 product family. The primary difference is reduced height (3.70 mm vs. 5.50 mm). This substitution is valid for applications where the lower profile does not conflict with mechanical constraints. Forward voltage is 3.8 V lower (45 V vs. 48.8 V), which must be accommodated by the power supply design.

Q: What is the difference between the two substitute parts?

A: SI-B8T463B20WW (V Gen3 series, Active status) represents a newer generation with improved efficiency (176 lm/W) and reduced height. SI-B8T522B2CUS (V-Series Gen2, Obsolete status) maintains the original height and test current but delivers higher luminous flux. SI-B8T463B20WW is preferred for new designs due to Active product status.

Q: Are there packaging differences between these parts?

A: Yes. SI-B8T463B20WW is supplied in Tray packaging, while SI-B8T522B2CUS is supplied in Bulk packaging. The main part packaging is not specified. Packaging selection depends on production volume and handling requirements.

Q: Do all parts have the same color temperature and CRI?

A: Yes. All three parts operate at 4000K with CRI 80, ensuring consistent color rendering and correlated color temperature across substitutions.

Q: What is the significance of the MSL (Moisture Sensitivity Level) difference?

A: SI-B8T521B2CUS and SI-B8T463B20WW have MSL Not Applicable, indicating no moisture sensitivity requirements. SI-B8T522B2CUS has MSL 1 (Unlimited), which also indicates no practical moisture sensitivity constraints for storage and handling.

Q: Can these parts be used interchangeably in existing fixtures?

A: Mechanical interchangeability depends on height tolerance. SI-B8T463B20WW (3.70 mm height) is thinner than the original (5.50 mm) and SI-B8T522B2CUS (5.50 mm). Verify fixture design clearances before substitution. Electrical interchangeability requires power supply compatibility with the forward voltage range (45–48.8 V).

Q: Which substitute should be selected for new production?

A: SI-B8T463B20WW is the recommended choice for new designs, as it carries Active product status, ensuring supply continuity and supporting long-term production requirements.