High Current Shielded 4R7 Power Inductor for Stable DC-DC Power Supply Unit

The 4R7 SMD Power Inductor, representing a 4.7μH inductance value, is a cornerstone of modern power electronics. It is specifically designed for high-density Switching Mode Power Supplies (SMPS) where space, efficiency, and electromagnetic compatibility (EMC) are paramount. Unlike traditional wire-wound inductors that are fragile and prone to electromagnetic leakage, the 4R7 molded series utilizes an "Integrated Molding" process where a pre-wound coil is encased in a high-grade metallic alloy powder through high-pressure injection, resulting in a solid, monolithic component.

The "4R7" designation indicates a 4.7 microhenry inductance, an ideal value for DC-DC buck and boost converters operating in the 500kHz to 5MHz range. Its ultra-low profile and square footprint allow placement directly adjacent to high-speed microprocessors and GPUs without interference.

• Superior Metal Alloy Construction: Proprietary iron-based metallic powders provide higher saturation current than traditional ferrite materials, preventing saturation during current spikes
• Total Magnetic Shielding: Integrated molding creates a natural magnetic shield, significantly reducing electromagnetic interference (EMI)
• Ultra-Low Buzz Noise: Bonded coil and core eliminate physical vibrations caused by magnetostriction for silent operation
• Soft Saturation Characteristics: Gradual saturation curve maintains functionality during temporary over-current conditions
• Excellent Thermal Management: Metallic powder structure provides superior thermal conductivity for higher current handling
• Automated High-Precision Manufacturing: CNC-controlled molding ensures consistent electrical parameters across production
• Lead-Free & Eco-Friendly: Fully compliant with RoHS and REACH standards with lead-free tinned terminals

For power supply designers, Saturation Current (Isat) and Heating Current (Irms) are the most critical metrics. The 4R7's metal powder core provides 30-50% higher Isat than ferrite inductors of the same size, allowing smaller components to handle the same current. Ultra-low DCR minimizes I²R heat losses, ensuring cool and reliable continuous operation.

The Self-Resonant Frequency (SRF) above 15MHz makes the 4R7 ideal for high-frequency buck converters in modern electronics. The wide Operating Temperature Range (-55°C to +125°C) ensures robustness for automotive and industrial applications.

The 4R7 Molded Inductor features Advanced Material Engineering with an Integrated Molded Structure that eliminates internal air gaps, preventing electromagnetic leakage and mechanical instability. High-pressure molding creates a monolithic magnetic circuit enabling high saturation levels in compact profiles.

Metal Alloy Powder Technology utilizes a proprietary blend of iron, silicon, and aluminum powders with insulation coating to prevent eddy current losses. The "Soft Saturation" characteristic provides gradual inductance decrease during over-current conditions, offering a safety net for power supply stability.

Automated Winding and Termination processes ensure structural reliability with CNC-controlled winding and integrated terminals resistant to shock and vibration. Specialized cleaning and tinning processes prepare components for high-speed SMT assembly.

The built-in EMI/EMC Shielding Advantage uses the metal alloy core as a natural Faradic cage, trapping magnetic flux within the component. This eliminates the need for external shielding cans and complex PCB routing in many applications.

Primary energy storage element for DC-DC converters powering CPUs and GPUs. Low-profile, high-current design enables slim device designs while high efficiency extends battery life.

Vital component for ADAS and infotainment modules. AEC-Q200 compliant design with high-temperature tolerance withstands automotive environmental extremes while filtering electrical noise.

Essential for high-efficiency VRM designs in servers and workstations. High saturation current and ultra-low DCR minimize energy waste, reducing total cost of ownership and cooling requirements.

Provides stable power for Wi-Fi and Bluetooth communication modules. Low-loss design and silent operation make it ideal for battery-powered, always-on devices in living environments.

Chipsen Electronics is a professional manufacturer specializing in high-performance transformers and magnetic components with over 26 years of manufacturing expertise. Founded in 2000, we operate 4 production bases covering over 7,200 square meters with 400+ skilled employees.

We hold authoritative certifications including ISO9001, ISO14001, and IATF16949, with products approved by UL Class B/F/H, CQC, RoHS, and REACH. Our portfolio includes 36+ utility patents supported by a robust in-house R&D team.

• Full Service Customization: Rapid design support within 24-48 hours based on your specifications
• Extensive Product Portfolio: 200+ product types including transformers, inductors, filters, and chokes
• Advanced Manufacturing Capability: Automated winding and assembly machines improving efficiency by 8x
• Strict Quality Control: 100% testing procedures including electrical performance and reliability tests
• High Voltage & High Frequency Expertise: Specialized in 5KV to 40KV transformers and power solutions
• Flexible MOQ & Fast Lead Time: Prototype to bulk production with 7-15 day lead times
• OEM/ODM Supported: Competitive factory direct pricing with strong R&D team support