LED Module SI-B8RZ91B2CUS Equivalent & Substitute Parts

Part Overview

The SI-B8RZ91B2CUS is a Samsung Semiconductor LED Module classified as LT-VB24F Linear Light Strip, designed for white, cool-toned lighting applications at 5000K color temperature. This module delivers 15632 lm nominal luminous flux at 2.24A test current with a color rendering index (CRI) of 80. The product is currently listed as obsolete, necessitating identification of functionally equivalent active alternatives to maintain supply chain continuity for applications requiring compatible LED lighting modules with matching optical and electrical characteristics.

Substiute Parts

SI-B8RZ91B2CUS

Samsung Semiconductor, Inc.In Stock: 1042SI-B8RZ91B2CUS Datasheet

Current PartRFQ

SI-B8R923B20WW

Samsung Semiconductor, Inc.In Stock: 1139SI-B8R923B20WW Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete SI-B8RZ91B2CUS is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Color Temperature (CCT): 5000K (cool white) — must match exactly
• Color Rendering Index (CRI): 80 — must match exactly
• Configuration: Linear Light Strip — must match exactly
• Color Appearance: White, Cool — must match exactly
• Base Product Number: SI-B8 — indicates compatible platform architecture
• Lens Type: Flat — must match exactly
• Packaging: Tray — must match exactly

Secondary Compatibility Parameters:

• Forward voltage (Vf) within acceptable operating range for existing driver circuits
• Luminous flux output within functional range for target application
• Current ratings compatible with existing power supply specifications
• Physical dimensions permitting mechanical fit within existing fixtures

The substitute part SI-B8R923B20WW meets all primary substitution criteria and shares the SI-B8 base product platform, confirming functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

SI-B8R923B20WW as Direct Substitute:

The SI-B8R923B20WW is classified as an active product from Samsung Semiconductor, Inc., and is the designated substitute for the obsolete SI-B8RZ91B2CUS. Both modules share identical color temperature (5000K), color rendering index (80), configuration (linear light strip), and base product platform (SI-B8).

Electrical Compatibility: The substitute operates at lower forward voltage (45V vs. 48.8V) and lower test current (2.02A vs. 2.24A), resulting in reduced power consumption. Existing driver circuits designed for the main part will operate the substitute within safe parameters. The substitute's maximum current rating (2.02A) is lower than the main part's maximum rating (3.24A); applications operating at the main part's maximum current must be re-evaluated for the substitute.

Optical Performance: The substitute delivers higher luminous flux (16000 lm vs. 15632 lm) and superior luminous efficacy (176 lm/W vs. 143 lm/W), providing enhanced light output and energy efficiency. Color temperature and CRI remain identical, ensuring consistent color appearance and rendering in end-use applications.

Mechanical Considerations: The substitute is 80 mm shorter in length (1120 mm vs. 1200 mm) and features a lower profile (3.70 mm vs. 5.50 mm height). Applications requiring the full 1200 mm length must address the dimensional difference through fixture redesign or supplementary modules. The reduced height may improve thermal management and mechanical fit in space-constrained installations.

Regulatory and Compliance: Both parts carry identical ECCN (EAR99) and HTSUS classifications (8541.41.0000), confirming equivalent export control and tariff treatment. Moisture sensitivity level is not applicable to both parts.

Supply Chain Status: The substitute is currently in active production with confirmed inventory availability (1032 pcs), ensuring reliable procurement for new designs and replacement applications.

Frequently Asked Questions (FAQ)

Q1: Can SI-B8R923B20WW directly replace SI-B8RZ91B2CUS in existing fixtures?

A: Electrical substitution is direct for applications operating below 2.02A. Mechanical substitution requires evaluation of the 80 mm length difference and 1.80 mm height reduction. Fixtures designed for the 1200 mm length must be modified or supplemented. The lower profile of the substitute may improve fit in space-constrained applications.

Q2: What is the impact of the lower forward voltage on existing driver circuits?

A: The substitute operates at 45V versus 48.8V, a 7.8% reduction. Constant-current LED drivers will automatically adjust voltage to maintain the specified current, resulting in lower power consumption and improved efficiency. Constant-voltage supplies may require recalibration. Consult driver documentation for voltage adjustment range specifications.

Q3: Are the color temperature and color rendering identical between the two parts?

A: Yes. Both parts are specified at 5000K color temperature with CRI 80. Color appearance and rendering performance are identical. No color-related adjustments are required during substitution.

Q4: What is the significance of the higher luminous flux in the substitute?

A: The substitute delivers 16000 lm versus 15632 lm at test conditions, a 2.3% increase. This results in brighter light output from the same physical module. Applications sensitive to light output levels should account for this increase in system design calculations.

Q5: Why is the substitute's maximum current rating lower than the main part?

A: The SI-B8R923B20WW is specified with a maximum current of 2.02A, identical to its test current, indicating a narrower operating range. The SI-B8RZ91B2CUS allows operation up to 3.24A. Applications requiring operation above 2.02A cannot use the substitute without exceeding its maximum rating. Verify actual operating current in your application before substitution.

Q6: How does the viewing angle specification affect substitution?

A: The substitute specifies a 118° viewing angle; the main part does not provide this specification. The 118° viewing angle indicates a wide-angle light distribution suitable for general illumination. If your application requires a specific viewing angle, confirm that 118° meets performance requirements.

Q7: Are there any packaging or handling differences?

A: Both parts are supplied in Tray packaging with identical ECCN (EAR99) and HTSUS classifications. No special handling or packaging modifications are required. Standard LED module handling procedures apply to both parts.

Q8: What is the base product number significance?

A: Both parts share the SI-B8 base product number, indicating they are built on the same platform architecture. This confirms fundamental compatibility in electrical interface, thermal characteristics, and mechanical mounting provisions. The base product number is a primary indicator of substitution feasibility.

Q9: Can the substitute be used in applications requiring the full 1200 mm length?

A: No. The substitute is 1120 mm long, 80 mm shorter than the main part. Applications with fixed-length requirements must either modify fixtures to accommodate the shorter module or use multiple substitute modules to achieve the required total length. Consult application documentation for length-dependent performance specifications.

Q10: Is the substitute's improved efficiency (176 lm/W vs. 143 lm/W) a design change or manufacturing improvement?

A: The substitute is designated as V Gen3, indicating a newer generation design. The efficiency improvement reflects design advancement in the LED module platform. This is a beneficial characteristic for energy-conscious applications and does not introduce compatibility concerns.