DR3W 9x12 3 Pins Drum Core Inductor Radial Choke Coil For Switching Power Supply
The 3-Pin Drum Core Inductor (also known as a Tapped Inductor or Auto-transformer Inductor) is a specialized radial leaded magnetic component designed for high-density power and signal circuits. Built on a high-grade ferrite drum core with a specialized three-terminal base, this inductor features a dual-winding or center-tapped architecture. It bridges the gap between simple energy-storage inductors and full-sized transformers, providing a compact, low-cost solution for voltage step-up, step-down, or feedback sensing within a single, space-efficient footprint.
| Parameter | Typical Value / Spec |
|---|---|
| Type | 3-Pin Drum Core (Tapped) |
| Core Dimensions | 0608 / 0810 / 0912 / 1012 / 1016 |
| Mounting | Radial Through-hole (THT) |
| Protective Cover | UL Heat Shrink Tubing (Black/Clear) |
| Total Inductance Range | 10 uH - 100 mH |
| Tap Configuration | Center Tapped / Custom Ratio |
| Inductance Tolerance | +/- 10% / +/- 20% |
| Rated Current (Idc) | 50 mA - 3.5 A (Depends on size) |
| Max DCR (Resistance) | 0.05 Ohm - 10.0 Ohm |
| Dielectric Strength | 500V - 1000V AC (Between windings) |
| Core Material | Mn-Zn / Ni-Zn Ferrite Core |
| Winding Wire | High-Temp Enameled Copper Wire |
| Insulation Class | Class B (130°C) / Class F (155°C) |
| Operating Temp | -25°C to +105°C |
| Storage Temp | -40°C to +85°C |
| Compliance | RoHS, REACH, ISO9001 |
- Integrated Tapped Geometry: The third pin enables the inductor to function as a miniature auto-transformer, allowing for voltage transformation without the bulk of a secondary winding frame.
- High Saturation Magnetic Cores: Utilizing premium Mn-Zn (Manganese-Zinc) or Ni-Zn (Nickel-Zinc) ferrite materials to ensure high saturation flux density and stable inductance under continuous DC bias.
- Precision Automatic Winding: Each unit is precision-wound with high-purity enameled copper wire to ensure exact turn counts and specific tap ratios (e.g., 1:5, 1:10), which is critical for consistent output voltages.
- Durable Protective Cover: Encased in UL-rated polyolefin heat-shrink tubing, providing excellent mechanical protection, moisture resistance, and high-voltage dielectric strength.
- Space-Saving Radial Design: The vertical mounting profile minimizes PCB real estate, making it ideal for compact chargers, handheld devices, and LED drivers.
- Switch Mode Power Supplies (SMPS): Used as the primary energy storage and feedback element in small-power AC/DC and DC/DC modules.
- LED Driver Circuits: Provides precise current sensing or voltage feedback to maintain stable LED brightness and pass EMI tests.
- Electronic Ballasts & Igniters: Functions as a compact voltage-boost element for starting and driving gas-discharge lamps.
- Smart Home & Handheld Gadgets: Supplies stable power filtering and voltage transformation for smart plugs, wearable sensors, and portable chargers.
- Exceptional Cost-Performance Ratio: Significantly more economical than traditional E-core or Toroidal transformers, offering similar voltage-transformation capabilities in a simplified manufacturing process.
- High Energy Density: The drum core shape is optimized for maximum energy storage within a minimal vertical profile, supporting higher power ratings than similarly sized chip inductors.
- Superior Consistency: Automated production lines and 100% inductance testing guarantee that electrical parameters like Leakage Inductance and DC Resistance (DCR) are perfectly uniform across mass-production batches.
- Rugged Reliability: The solid core construction and high-grade insulation make the inductor highly resistant to mechanical shock and vibration, ensuring a maintenance-free service life of over 10 years in diverse industrial, consumer, and automotive electronics.
Chipsen Electronics Technology Co., Ltd., established in 2000, is a specialized manufacturer of high frequency transformer, low frequency transformer, toroidal inductor, SMD power inductor, super high current inductor, choke coil and switch. Chipsen has earned a strong reputation in domestic and overseas markets including North & South America, Europe and Southeast Asia.
As an ISO9001, ISO14001 & IATF16949 audited company, Chipsen possesses a professional management team committed to producing environmentally friendly and qualified products. Our products are certified by UL Class B/Class F/Class H, CQC and RoHS, and we hold 21 patents. These achievements stem from our strong R&D team, which provides various solutions for temperature reduction, noise cancellation, and coupled radiation conductivity.
Our products are widely used in various fields including new energy, PV, UPS, Robotics, smart home, security systems, health care and communication.
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Mission: Create Values for Customers and Society, Grow with Customers and Staff
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