SI-N8T1123B1US

FAQFrequently Asked Questions

• What are the key design constraints when integrating the SI-N8T1123B1US LED module into a 120VAC fixture? The SI-N8T1123B1US operates directly from 120VAC input, which eliminates the need for a separate AC-to-DC converter in the fixture design. However, you must ensure that the fixture's thermal management and optical path accommodate the module's 55mm × 55mm square footprint and 12.5mm height. The 120VAC forward voltage specification means the module includes integrated rectification and current limiting, so your fixture design should focus on mechanical mounting, heat dissipation (the module operates at 25°C under test conditions), and optical integration rather than power conversion circuitry.
• Can the SI-N8T1123B1US be used as a direct replacement for other 4000K LED modules in existing fixtures? The SI-N8T1123B1US is not a direct replacement for all 4000K LED modules because compatibility depends on three critical factors: (1) voltage input—the module requires 120VAC, so it only replaces modules also rated for 120VAC, not 12VDC or 24VDC alternatives; (2) physical footprint—the square 55mm × 55mm configuration may not fit fixtures designed for round or rectangular modules; and (3) thermal characteristics—since the module is rated at 1200lm typical output with a 106 lm/W efficiency, verify that your fixture's heat sink can handle the thermal load. Before substituting the SI-N8T1123B1US into an existing design, confirm the voltage compatibility and measure the thermal interface to avoid premature failure.
• How does the 115° viewing angle of the SI-N8T1123B1US affect fixture design for general lighting applications? The 115° viewing angle on the SI-N8T1123B1US means light is emitted across a relatively wide cone, which is typical for general illumination and architectural lighting rather than narrow-beam spotlights. When designing a fixture, this wide angle allows for simplified optics—you may not need complex reflectors or secondary lenses to achieve acceptable light distribution. However, if your application requires tighter beam control or directional lighting (such as accent lighting or task lighting), you may need to add a lens assembly or reflector around the SI-N8T1123B1US to narrow the beam. The flat lens type integrated into the module supports this flexibility.
• What reliability concerns should be considered for long-term operation of the SI-N8T1123B1US in industrial or outdoor environments? The SI-N8T1123B1US is rated as RoHS compliant and carries an MSL (Moisture Sensitivity Level) classification of 'Not Applicable,' indicating that the module is designed to tolerate typical manufacturing and operational moisture exposure without requiring special desiccant handling. For industrial or outdoor use, the primary reliability considerations are thermal cycling (repeated heating and cooling) and sustained elevated temperatures—ensure your fixture provides active or passive cooling to keep the module near its 25°C test condition. The module's 120VAC input design means you must also verify electrical safety compliance (UL, CE, or equivalent) at the fixture level, as the module itself operates at mains voltage.
• Is the SI-N8T1123B1US suitable for retrofit applications in existing incandescent or halogen fixtures designed for 120VAC operation? The SI-N8T1123B1US can be adapted for retrofit use in 120VAC fixtures if the fixture's mechanical socket and thermal design can accommodate a 55mm × 55mm × 12.5mm module. The direct 120VAC operation is compatible with legacy AC wiring. However, critical retrofit challenges include: (1) the fixture's optical path may be designed for a different light source geometry, potentially causing uneven illumination; (2) thermal management differs—incandescent fixtures often rely on convective cooling suitable for heat-generating sources, whereas the SI-N8T1123B1US generates less waste heat but requires different heat-sink design; and (3) the SI-N8T1123B1US delivers 1200lm at 4000K (neutral white), whereas halogen fixtures may produce warmer light, affecting perceived brightness and color appearance. Test photometric output and thermal behavior before deploying in existing fixtures.
• How do the 106 lm/W efficiency and 1200lm output of the SI-N8T1123B1US compare to alternative 4000K LED modules for cost and power consumption? The SI-N8T1123B1US achieves 106 lm/W efficiency, which translates to approximately 11.3W power consumption at the 1200lm output level (1200lm ÷ 106 lm/W ≈ 11.3W). This efficiency is competitive with mid-range LED modules but trails premium high-efficiency modules (which may exceed 140 lm/W in optimized designs). When evaluating alternatives, compare not only lm/W but also: (1) total light output needed for your application; (2) thermal management costs (higher efficiency means lower cooling burden); (3) module cost versus lifetime operational savings; and (4) whether alternative modules operate at compatible voltages (many alternatives use 12VDC or 24VDC, requiring additional power supply hardware). The SI-N8T1123B1US's direct 120VAC operation eliminates power supply costs, which may offset slightly lower lm/W efficiency compared to some premium 24VDC alternatives.
• What is the practical difference between the SI-N8T1123B1US's 80 CRI and higher CRI alternatives, and when does it matter for design? The SI-N8T1123B1US has a Color Rendering Index (CRI) of 80, which means colors appear reasonably natural but with subtle desaturation compared to natural daylight (CRI 100). In practical terms, 80 CRI is acceptable for general illumination, retail displays, and most commercial applications where budget is a concern. However, applications requiring accurate color discrimination—such as art galleries, photography studios, or retail jewelry displays—typically specify 90+ CRI. When choosing the SI-N8T1123B1US for your design, verify that end users will not perceive unnatural color rendering. If higher CRI is required, you will need to source an alternative module or accept the cost and thermal implications of upgrading to a higher-CRI 4000K LED engine. The SI-N8T1123B1US's CRI is fixed and cannot be adjusted in the field.
• Can the SI-N8T1123B1US be dimmed or color-tuned after installation, and what are the design implications? The SI-N8T1123B1US is a fixed 4000K LED module with no built-in dimming or color-tuning capability described in its specification. If your application requires dimming, you must integrate a dimming circuit (phase-cut or 0-10V control) at the fixture level, which adds design complexity and cost. The module's 120VAC input makes traditional phase-cut dimming feasible if done upstream of the module, but you should verify compatibility with the module's internal driver. Color tuning is not possible with the SI-N8T1123B1US because the 4000K output is fixed at the module level—to enable tunable color temperature, you would need a tunable color-temperature module (if available from Samsung) or a fixture using multiple fixed-color modules with independent controls. Plan your fixture design around the SI-N8T1123B1US's fixed 4000K output unless dimming or tuning capability is integrated at the system level.
• What thermal management approach is needed to maintain the SI-N8T1123B1US at or near its 25°C test condition in continuous operation? The SI-N8T1123B1US is rated at 1200lm and 106 lm/W under 25°C test conditions. In real-world operation, the module will generate heat, and sustained elevated temperatures will degrade lumen output and color stability. To maintain performance, design your fixture with adequate thermal interface—typically a metal heat sink in direct contact with the module's base, thermally coupled to ambient air or a cooling fluid. The fixture's thermal resistance (°C/W) must be low enough that the module remains within acceptable operating limits. Without explicit maximum junction temperature or thermal resistance data in the basic specification, consult Samsung's detailed datasheet or thermal modeling to determine the required heat sink design. Inadequate cooling will result in lumen droop (reduced light output) and potential CRI shift over time, particularly problematic in applications where consistent brightness is required.
• How does the SI-N8T1123B1US's square 55mm × 55mm form factor affect optical and mechanical design compared to circular LED modules? The SI-N8T1123B1US's square 55mm × 55mm footprint differs from the common circular modules found in many industrial LED applications. Mechanically, the square form factor can be advantageous in fixture designs where space is rectangular (such as panel lights or linear fixtures), reducing wasted area compared to circular modules. Optically, the square geometry means secondary lens or reflector designs must account for four distinct edges rather than radial symmetry, potentially complicating uniform light distribution. The flat lens integrated into the SI-N8T1123B1US helps, but fixture designers must verify that the square source geometry produces acceptable illumination patterns for the intended application. If your fixture design already uses circular or other non-square modules, retrofitting the SI-N8T1123B1US will require redesign of the optical path and mechanical mounting—this is not a simple plug-in replacement.
• What electrical safety and compliance testing is required when integrating the SI-N8T1123B1US into a commercial lighting fixture? The SI-N8T1123B1US operates at 120VAC, which means the fixture using this module must meet electrical safety standards such as UL 1598 (safety of luminaires), CSA C22.2, or equivalent regional standards. The module itself is marked as RoHS compliant and carries ECCN code EAR99, but compliance at the module level does not automatically satisfy fixture-level safety requirements. Your fixture design must ensure that the 120VAC power path includes proper isolation, current limiting, fault protection, and grounding to prevent shock hazards and fire risks. Additionally, thermal testing is required to verify that external surfaces do not reach hazardous temperatures. Before shipping a fixture incorporating the SI-N8T1123B1US, conduct or obtain third-party safety certification appropriate for your market (North America, EU, etc.). The module's simplicity—direct 120VAC operation without external components—simplifies electrical design compared to DC modules but does not eliminate safety certification requirements at the fixture level.
• Are there Samsung Semiconductor part number alternatives or variants of the SI-N8T1123B1US with different color temperatures, efficacy, or form factors? The SI-N8T1123B1US belongs to Samsung's ACOM DLE series, as indicated by the base product number SI-N8T. Within this series, variants likely exist with different color temperatures (e.g., 3000K warm white or 5000K cool white), different lumen outputs, or different configurations. The 'B1US' suffix in the part number may indicate specific binning (color and intensity sorting) and market designation (US region). If you need a variant with different specifications—such as higher efficacy, different CRI, or alternative color temperature—consult Samsung's product selector tool or contact their applications support to identify the correct part number. Mixing variants from different bins or configurations in a production fixture can result in visible color or brightness differences between units, so standardize your part number across all units in a design.
• What are the long-term degradation patterns and lumen maintenance characteristics of the SI-N8T1123B1US, and how should this be factored into fixture design life predictions? The SI-N8T1123B1US specification provides the 1200lm output at 25°C test condition but does not explicitly state lumen maintenance data (e.g., L70 or L90 lifetime, which indicate time-to-70% or 90% of initial lumens). Without this data in the basic spec, consult Samsung's detailed datasheet or IES photometric reports to obtain lumen maintenance curves. Typical LED modules degrade from thermal stress, phosphor degradation, and encapsulant yellowing over time. In fixture design, account for lumen depreciation by over-specifying initial lumen output by 10–20% depending on the target application life (e.g., 25,000 or 50,000 hours). Additionally, if color temperature stability is critical, verify Samsung's color shift data (Δu'v over time) under realistic thermal cycles. Long-term performance prediction requires this manufacturer data to ensure the fixture meets brightness and color requirements throughout its intended operational life.
• How does the SI-N8T1123B1US's 115° viewing angle compare to narrow-angle alternatives, and when should a different module be selected? The SI-N8T1123B1US emits light across a 115° viewing angle, which provides wide, diffuse illumination suitable for general-purpose lighting (overhead panels, ambient room lighting). Narrow-angle modules (typically 30–60°) concentrate light into a tight beam, useful for spotlights or task lighting where directionality is required. If your application is architectural or general illumination where wide light spread is desired, the SI-N8T1123B1US's 115° angle is appropriate and reduces the need for complex optical redirecting. Conversely, if your application requires directional lighting or accent lighting, the wide angle becomes a disadvantage—light is wasted outside the target zone, reducing effective brightness in the intended direction. In such cases, select a narrow-angle alternative from Samsung's product line or design secondary optics around the SI-N8T1123B1US to collimate the light. The choice between wide-angle and narrow-angle modules is application-specific and affects fixture efficiency and cost.
• What is the expected behavior and reliability of the SI-N8T1123B1US if operated outside its 25°C test condition, such as in hot climates or enclosed spaces? The SI-N8T1123B1US is rated at 1200lm and 106 lm/W at 25°C (typically room temperature). Operation at elevated temperatures (e.g., 40°C, 50°C, or higher in enclosed fixtures or hot climates) will cause: (1) lumen output to decrease, typically 0.2–0.4% per °C above the test temperature; (2) color shift toward cooler hues due to phosphor thermal quenching; and (3) accelerated long-term degradation of the encapsulant and phosphor. Without explicit thermal derating curves in the basic spec, consult Samsung's detailed datasheet to quantify performance loss at your expected operating temperature. For fixtures in hot environments, design increased thermal dissipation (larger or better-cooled heat sinks) to keep the module as close to 25°C as possible. If the fixture will operate at temperatures significantly above 25°C for extended periods, factor in performance degradation when specifying initial brightness or request a higher-lumen variant of the SI-N8T1123B1US to compensate.