Part Number: DO3316T-473MLB
Function: 47 µH, High Temp Power Inductor
Manufacturer: Coilcraft Inc
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Description
DO3316T-473MLB is a high-temperature, shielded ferrite power inductor designed for automotive and high-reliability power applications. It offers low DC resistance (DCR), high current handling capability, and stable inductance under elevated temperature conditions, making it suitable for DC/DC converters and power management circuits.
Features
- Inductance: 47 µH (±10% tolerance typical)
- Designed for high-temperature operation (up to 125°C ambient)
- AEC-Q200 Grade 1 qualified (–40°C to +125°C)
- Low DC resistance (DCR) for improved efficiency
- High RMS current handling capability
- Shielded construction (reduced EMI)
- Soldered self-leaded design for robust mounting
- RoHS compliant (Sn-Ag-Cu termination)
Mechanical / Material Characteristics
- Core material: Ferrite
- Construction: Molded / shielded power inductor
- Weight: 0.95 ~ 1.25 g
- Excellent solderability and mechanical reliability
Electrical Characteristics (Typical)
- Inductance (L): 47 µH
- Tolerance: ±10%
- Low DCR → reduces conduction losses
- High saturation current (Isat) → prevents inductance drop under load
Design Notes
- Verify both IRMS (thermal limit) and Isat (magnetic saturation limit)
- Ferrite core → low core loss at high frequency but saturation-sensitive
- Place close to switching node to minimize loop area and EMI
- Consider temperature derating for automotive environments
- Shielded structure helps reduce radiated EMI in dense layouts
Typical Applications
- Automotive DC/DC converters
- Switch-mode power supplies (SMPS)
- Power management for industrial electronics
- LED drivers and battery-powered systems
- Point-of-load (POL) converters
How to Choose This Inductor
- Select inductance value based on switching frequency and ripple current
- Ensure IRMS rating exceeds load current
- Ensure Isat exceeds peak inductor current
- Evaluate DCR for efficiency-sensitive designs
- Confirm thermal margin under worst-case ambient conditions
Other data sheets are available within the file:
DO3316T, DO3316T-102MLB, DO3316T-102MLD,
DO3316T-103MLB, DO3316T-103MLD
DO3316T-473MLB Datasheet PDF Download
