33uH 3A High Current Toroidal Dip Inductor

33uH 3A High Current Toroidal DIP Inductor is an essential passive component engineered for demanding power applications, providing superior energy storage and filtering capabilities. Featuring a distinctive ring-shaped ferrite core, this inductor offers a high inductance value in a compact footprint. Consequently, toroidal geometry minimizes the external magnetic field, drastically reducing electromagnetic interference (EMI) compared to traditional rod or drum core inductors. Its robust design allows it to safely handle continuous currents up to 3A, making it perfect for DC/DC conversion and power filtering. Therefore, designers frequently select this 33µH inductor to ensure high efficiency and stability in switching regulator circuits where space efficiency and low noise are critical performance factors.

Key Features:

• Toroidal Core Design: The closed magnetic path confines the magnetic flux within the core, significantly minimizing radiation noise and crosstalk, which in turn enhances circuit stability.
• High Current Capacity (3A): This specification guarantees reliable performance under heavy load conditions, making it suitable for modern power management circuits.
• Low DC Resistance (DCR): Features low DC resistance, thus minimizing power loss and improving overall system efficiency.
• Through-Hole Mounting (DIP): The radial pin configuration ensures simple, secure, and cost-effective mounting on standard Printed Circuit Boards (PCBs).
• High Saturation Flux Density: Maintains inductance at high current levels, preventing the core from saturating and avoiding sudden drops in inductance.

Technical Specifications:

• Nominal Inductance (L): 33 µH (Microhenry)
• Inductance Tolerance: ±20% (Standard)
• Maximum Rated Current (I_DC): 3 A (Amperes)
• Maximum DC Resistance (DCR): Typically 38 mΩ (Milliohms)
• Core Material: Ferrite or Iron Powder (e.g., T50-26)
• Operating Frequency: Up to ≈ 1 MHz (Application dependent)
• Operating Temperature Range: −40°C to +105°C

Mechanical Specifications:

• Package Style: Radial, Vertical (Open Toroid/DIP)
• Winding Type: Enameled Copper Wire
• Mounting: Through-Hole Technology (THT)
• Shielding: Unshielded (Inherently low EMI due to toroidal shape)

Dimensions:

• Outer Diameter (OD): ≈ 15.5 mm (Varies, commonly 14 mm to 19 mm)
• Height/Width (H): ≈ 7 mm to 8 mm
• Wire Diameter: ≈ 0.35 mm (AWG 27)
• Weight: ≈ 4 g to 9 g (Lightweight construction)

Pinout and Wiring:

• Pin 1 (Input): Connect this terminal to the input voltage source (e.g., the switching node of a DC/DC converter).
• Pin 2 (Output): Connect this terminal to the output circuit or filter stage.
• Polarity: This inductor is non-polarized; connect either pin as input or output.
• Wiring Note: Keep the lead wires trimmed short when soldering to the PCB to minimize parasitic resistance and stray inductance, which consequently preserves the inductor’s intended filtering performance.

Datasheet Reference:

• Download DTPU033A3 Toroidal Inductor Datasheet

Commonly Used in:

• DC-DC Converters: Essential for smoothing the output current and voltage ripple in buck, boost, and SEPIC topologies (e.g., circuits based on LM2596 regulators).
• Switch-Mode Power Supplies (SMPS): Used extensively in the output filtering stage to improve power quality.
• EMI/RFI Filtering: Serves as a differential mode choke to block high-frequency noise while passing the required DC current.

Applications:

• Voltage Regulator Modules (VRM): Integrates into computer motherboards and server power sections to ensure stable core voltage.
• Portable Electronics: Ideal for devices like notebook PCs, PDAs, and portable gaming machines that require high-density power conversion.
• LED Lighting Systems: Provides inductive filtering in high-power LED drivers to prevent flicker and enhance longevity.
• Industrial Control: Manages power rails in automation and measuring equipment that require a stable DC supply.

Equivalent Models:

• Bourns 2107-H-RC: A similar 33µH, high-current (5A), through-hole toroidal inductor from a major manufacturer.
• Murata 33330C Series: Furthermore, Murata offers toroidal inductors with similar µH and current ratings (e.g., 33µH, 4.2A) which function as suitable alternatives.
• Any 33µH Toroid: Generally speaking, any through-hole toroidal inductor with 33µH inductance and a current rating ≥ 3A can serve as a functional replacement.

Package Includes:

• 1 x 33uH 3A High Current Toroidal Dip Inductor