CDRH127 47uH (470) Power Inductor

CDRH127 47µH (470) SMD Power Inductor 12x12x7mm is a high-current, surface-mount component specifically engineered to handle the demanding energy storage and filtering requirements of modern DC-DC converters. This inductor features a robust magnetic shielded structure, which consequently minimizes flux leakage and reduces electromagnetic interference (EMI) with surrounding components on the PCB. With its large size (12x12mm footprint) and low DC resistance, the CDRH127 effectively maintains high efficiency in power supply circuits operating at high switching frequencies. Furthermore, its capability to sustain a significant saturation current makes it an excellent choice for stabilizing voltage and regulating current in critical power pathways. Therefore, design engineers rely on this inductor for power management modules where reliable performance under heavy load conditions is non-negotiable.

Key Features:

• High Current Capacity: The inductor structure allows it to handle large DC bias currents without suffering significant inductance drop, ensuring stability under peak loads.
• Magnetic Shielding: Utilizing a shielded construction, the device effectively confines the magnetic field, preventing crosstalk and interference in dense circuit layouts.
• Low DC Resistance (DCR): Maintains a low DCR, which minimizes power loss and improves the overall efficiency of the power conversion circuit.
• Surface Mount Design (SMD): The component uses surface-mount technology, facilitating automated assembly and integration into compact, high-density PCBs.
• Broad Operating Temperature: Ensures reliable performance across a wide industrial temperature range, suitable for diverse operating environments.

Technical Specifications:

• Inductance (L): 47 µH (±20%)
• Inductance Marking: 470 (R47)
• DC Resistance (DCR): Typically 120 mΩ (Maximum 145 mΩ)
• Saturation Current (I_sat): ≈ 1.5 A (Current that causes L drop of ≤ 30%)
• Rated Current (I_rms): ≈ 1.4 A (Current that causes ΔT of 40°C)
• Self-Resonant Frequency (SRF): Typically 6.0 MHz
• Operating Temperature Range: −40°C to +105°C

Mechanical Specifications:

• Core Material: Ferrite Drum Core
• Shielding: Magnetic Shielded (Ferrite sleeve/cap)
• Termination: Plated Pads for Reflow Soldering
• Package Type: CDRH127 (Fixed Inductor)

Dimensions:

• Body Length (L): 12.0 mm (±0.3 mm)
• Body Width (W): 12.0 mm (±0.3 mm)
• Body Height (H): 7.0 mm (Maximum)
• Recommended Pad Layout: Consult manufacturer datasheet for precise land pattern.

Pinout and Wiring:

• Pin 1 (Input/Output): Connect one pad to the switching node of the converter (e.g., MOSFET drain or switch output).
• Pin 2 (Output/Input): Connect the second pad to the output capacitor and load.
• Orientation Note: Since power inductors are typically non-polarized components, orientation does not usually affect electrical function; however, always ensure secure soldering to the designated solder pads.

Datasheet Reference:

• Download CDRH127 Power Inductor Datasheet

Commonly Used in:

• Voltage Regulators: Forming the primary energy storage element in buck, boost, and buck-boost converter topologies.
• Battery-Powered Devices: Essential for converting battery voltage efficiently to the required system voltage (e.g., in portable medical equipment).
• Industrial Equipment: Used in robotics, networking hardware, and PLC modules where transient suppression is vital.

Applications:

• DC-DC Power Conversion: Smooths the switching current, delivering a stable voltage rail to microprocessors and high-power ASICs.
• EMI Filtering: Acts as a key filter element in power lines, suppressing high-frequency noise and improving system electromagnetic compatibility.
• LED Driver Circuits: Stores and releases energy to control the current flowing through high-brightness LED strings effectively.

Equivalent Models:

• Murata 744771147: A functionally similar 47µH shielded SMD power inductor; consequently, check the DCR and current rating for drop-in compatibility.
• Taiyo Yuden NR8070470M: Offers comparable inductance and current characteristics, providing an alternative choice for sourcing.
• TDK RLF1270470M: Features a similar 12×12 footprint and inductance value, furthermore, verify the specific height and DCR before substitution.

Package Includes:

• 1 x CDRH127 47µH SMD Power Inductor