SLA40476B-120L - 120nH Shielded Power Bead SMD Inductor | ITG
N.º de pieza: SLA40476B-120L ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $1.95 | $1,95 |
| 10 | $1.65 | $16,50 |
| 100 | $1.48 | $148,00 |
| 500 | $1.2 | $600,00 |
| 1.000 | $0.98 | $980,00 |
| 1.200 | $0.98 | $1.176,00 |
SLA40476B-120L Descripción general
What is a power bead inductor? A power bead (or "power choke") is a wire-wound or stamped SMD inductor that uses a closed ferrite core path to contain the magnetic field, providing low DCR and high saturation current for switching-converter power stages. Power beads sit one level above chip inductors in the inductor taxonomy (fixed inductor -> chip inductor / wire-wound inductor / power bead), and they sit below discrete common-mode chokes and planar transformers in the magnetics hierarchy.
Key specifications for this part include a nominal inductance of 120 nH with a tolerance of 15%, a maximum rated current of 105 A (per datasheet title) or 77 A (per distributor listings), and a maximum DC resistance of 0.125 mOhm. The shielded magnetic structure minimizes radiated EMI and allows adjacent PCB placement without coupling, which is critical in dense multiphase VR layouts. The nonstandard SMD footprint is designed for direct PCB land-pattern compatibility within the SLA40476B series.
Typical applications include multiphase buck converters for server and datacom VRMs, GPU/CPU core supply filtering, telecom base-station point-of-load regulators, and high-current POL modules where the inductor must carry tens of amps with minimal conduction loss. The combination of sub-milliohm DCR and high saturation current makes this part suitable for switching frequencies from 500 kHz to 1 MHz.
When designing with this part, ensure that the PCB copper pad geometry matches ITG's recommended land pattern to avoid mechanical stress and to maintain thermal dissipation. The closed magnetic path will saturate predictably; derate operating current by 20 percent when ambient exceeds 85 C to preserve inductance tolerance.
Alternativas directas para SLA40476B-120L — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
SLA40476B-100L
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SLA40476B-150L
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SLA40476B-180L
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SLA40476B-R1-120L
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SLA40476B-220L
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SLA40476B-120L Valores máximos y características eléctricas
| Inductance | 120 nH |
| Inductance Tolerance | ±15% |
| Maximum DC Resistance (DCR) | 0.125 mΩ |
| Rated Current (distributor listing) | 77 A |
| Maximum Current (datasheet title) | 105 A |
| Shielding | Yes (shielded) |
| Construction | Power Bead SMD |
| Encapsulado / Carcasa | Nonstandard SMD |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (per distributor listings) |
| Lead-Free Status | Lead Free (per distributor listings) |
Guía de configuración de pines de SLA40476B-120L nonstandard smd
Configuración de pines para SLA40476B-120L (encapsulado nonstandard smd). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para SLA40476B-120L.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
SLA40476B-120L es adecuado para 7 aplicacións: Multiphase Server VRM Buck Inductor, GPU/AI Accelerator Point-of-Load Filtering, Telecom Base Station POL Module, Industrial High-Current DC-DC Module, Datacenter Hot-Swap ORing / Distribution, Automotive 48 V Mild-Hybrid DC-DC, FPGA / ASIC Core Rail Decoupling.
Multiphase Server VRM Buck Inductor
The SLA40476B-120L's 120 nH inductance and 0.125 mΩ DCR suit it to multiphase buck VRMs in server CPU/GPU core rails where switching frequencies sit between 500 kHz and 1 MHz. The 77 A continuous rating covers a single phase leg with thermal margin, while the shielded construction minimizes crosstalk between adjacent phase inductors on dense PCB layouts.
Recomendado
GPU/AI Accelerator Point-of-Load Filtering
AI accelerator cards draw hundreds of amps at sub-1V core voltages, and the SLA40476B-120L is well-matched as an output filter inductor for the high-current POL stage feeding GPU rails. The sub-milliohm DCR keeps conduction loss under 1 W at 77 A, while the 120 nH value provides sufficient energy storage for transient load steps up to several hundred amps per microsecond.
Recomendado
Telecom Base Station POL Module
48 V telecom systems step down to 12 V or 5 V intermediate buses, then further to sub-1V rails for DSP and FPGA cores. The SLA40476B-120L serves as the energy-storage choke in the second-stage POL converter, where its 77 A rating and 0.125 mΩ DCR support high-current rails with minimal efficiency loss. The shielded magnetic path prevents coupling to adjacent RF circuitry on the base-station board.
Recomendado
Industrial High-Current DC-DC Module
Industrial 24 V or 48 V bus converters often require >50 A output stages for motor drives and robotic actuators. The SLA40476B-120L can carry the full output current of a single buck phase in such modules, with 0.125 mΩ DCR keeping conduction loss below 1 percent of delivered power. The shielded structure also reduces radiated EMI, helping modules meet CISPR 11/32 conducted and radiated emissions limits.
Recomendado
Datacenter Hot-Swap ORing / Distribution
Hot-swap controllers and ORing FET circuits in datacenter power distribution units need inductors that can carry high continuous current with very low DCR. The SLA40476B-120L's 0.125 mΩ DCR and 77 A rating make it suitable as a current-ripple smoothing element in such 12 V distribution paths, where efficiency gains of even 0.5 percent translate into multi-kW savings at rack scale.
Recomendado
Automotive 48 V Mild-Hybrid DC-DC
Mild-hybrid 48 V vehicle electrical systems use high-current DC-DC converters to interface with 12 V subsystems, often requiring inductors rated for sustained 50-100 A operation. The SLA40476B-120L's shielded construction and low DCR suit such automotive converters, provided the engineer verifies AEC-Q200 qualification and operating temperature range with ITG before vehicle integration.
Recomendado
FPGA / ASIC Core Rail Decoupling
High-performance FPGAs and ASICs draw sub-1V rails at hundreds of amps with load transients exceeding 100 A/µs. The SLA40476B-120L serves as the output filter inductor in the final regulation stage, where its low DCR and 120 nH value provide fast transient response. Designers typically pair it with ceramic output capacitors whose effective series resistance complements the inductor's ripple current contribution.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para SLA40476B-120L — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | SLA40476B-100L | SLA40476B-150L | SLA40476B-180L | SLA40476B-R1-120L | SLA40476B-220L |
|---|---|---|---|---|---|---|
| Package | Nonstandard SMD (SLA40476B) | Nonstandard SMD (SLA40476B) - same | Nonstandard SMD (SLA40476B) - same | Nonstandard SMD (SLA40476B) - same | Nonstandard SMD (SLA40476B-R1) - same family | Nonstandard SMD (SLA40476B) - same |
| Brand | ITG Electronics | ITG Electronics | ITG Electronics | ITG Electronics | ITG Electronics | ITG Electronics |
| Inductance | 120 nH | 100 nH (-17%) | 150 nH (+25%) | 180 nH (+50%) | 120 nH (identical) | 220 nH (+83%) |
| Inductance Tolerance | ±15% | ±15% | ±15% | ±15% | ±15% | ±15% |
| Maximum DCR | 0.125 mΩ | 0.125 mΩ | 0.125 mΩ | 0.125 mΩ | ≤0.125 mΩ (improved) | 0.125 mΩ |
| Continuous Current (distributor) | 77 A | 77 A | 77 A | 77 A | 77 A (similar) | 77 A |
| Shielding | Shielded | Shielded | Shielded | Shielded | Shielded | Shielded |
| RoHS / Lead-Free | Yes | Yes | Yes | Yes | Yes | Yes |
Diferenciadores clave
- Sub-milliohm DCR in nonstandard SMD footprint (frente a Generic 120 nH chip inductors)
- Proprietary nonstandard SMD land pattern (frente a SLA40476B-100L / -150L same-family variants)
- Available higher-efficiency R1 revision on identical footprint (frente a SLA40476B-R1-120L revision)
Notas de diseño
Estimated: at 77 A continuous load and 0.125 mΩ DCR, conduction loss is I²·R ≈ 0.74 W per inductor. In a typical 4-phase multiphase VRM this contributes ~3 W of total inductor loss; place each inductor over a 4-layer PCB inner copper pour of at least 1 oz copper weight on layers 2 and 4 to keep hotspot temperature rise below 30 °C. Without thermal management, expect 50-60 °C rise above ambient at full load.
Use ITG's official footprint drawing from https://itg-electronics.com/en/series/708 in your PCB CAD library. The nonstandard SMD land pattern is not a generic EIA size (it is not 2525, 4040, or any standard chip-inductor footprint), so substituting a generic footprint will cause tombstoning, solder voids, or mechanical cracking during thermal cycling. Apply the recommended stencil thickness (typically 0.15 mm) for both termination pads.
Two figures of merit for current rating appear in the datasheet: 77 A continuous (DigiKey listing) and 105 A maximum (datasheet title). Design to the lower 77 A value and derate further at high ambient temperature — saturation current falls and winding loss rises with temperature, so a 20 percent current derating above 85 °C ambient is a reasonable starting point. Always check Isat and Irms ratings separately against your worst-case operating conditions.
The shielded magnetic structure minimizes near-field coupling, but adjacent inductors should still be spaced at least 5 mm apart and oriented with their axes parallel to minimize residual flux coupling. Keep the input-loop, output-loop, and snubber-loop areas as small as possible to reduce high-frequency ringing; pair the inductor with low-ESR ceramic output capacitors (e.g., X7R or C0G) for switching frequencies above 500 kHz.
Información de cumplimiento
RoHS and lead-free status confirmed by distributor listings (DigiKey 13237309, IC Components). REACH, halogen-free, and conflict-minerals declarations not specifically stated in the Verified Web Data; engineer should request the ITG material declaration for these compliance items.
