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NPIS43LS4R7MTRF

4.7uH shielded power inductor, 2.9A Isat, 2A Irms, 60mΩ DCR, 4.0x4.0x3.0mm SMD

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Manufacturer Part：

NPIS43LS4R7MTRF

Package：

SMD 4.0 x 4.0 x 3.0mm (Case 1515)

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Description

Product Overview

The NPIS43LS4R7MTRF from NIC Components is a shielded power wirewound inductor with 4.7µH inductance, ±20% tolerance, and a compact 4.0 x 4.0 x 3.0mm SMD package. It supports up to 2A RMS current with 2.9A saturation current, 60mΩ maximum DC resistance, and operates from -40°C to +125°C. The semi-shielded construction provides effective EMI suppression while maintaining a small footprint.

Key Specifications

Inductance 4.7 µH
Tolerance ±20% (M)
Saturation Current (Isat) 2.9 A
RMS Current (Irms) 2.0 A
DC Resistance (DCR) 60 mΩ max (78 mΩ typ at Arrow)
Self Resonant Frequency (SRF) 31 MHz
Test Frequency 100 kHz, 1V
Package 4.0 x 4.0 x 3.0mm (Case 1515)
Operating Temperature -40°C to +125°C

Features

  • Semi-shielded construction for EMI suppression
  • High current handling: up to 2.9A saturation
  • Low DC resistance: 60mΩ max
  • Compact 4.0 x 4.0mm footprint with 3.0mm profile
  • Wirewound technology for excellent saturation characteristics
  • RoHS compliant and tape-and-reel packaged

Applications

  • DC-DC buck/boost converter output inductors
  • Power management module energy storage
  • EMI filtering in power supply circuits
  • Portable electronics and battery-powered devices
  • Automotive and industrial power systems

The NPIS43LS4R7MTRF from NIC Components is a semi-shielded power wirewound inductor designed for DC-DC converter and power management applications. With 4.7µH nominal inductance and ±20% tolerance, it handles up to 2.9A saturation current and 2A RMS continuous current. The 60mΩ maximum DC resistance minimizes conduction losses, while the self-resonant frequency of 31MHz ensures stable performance across typical switching frequencies. The compact 4.0 x 4.0 x 3.0mm SMD package (case size 1515) is optimized for high-density PCB layouts in consumer, industrial, and automotive applications.

1. Energy Storage: The wirewound coil stores magnetic energy in its ferrite core when current flows through it, following the relationship E = ½LI². The 4.7µH inductance determines the energy storage capacity per cycle.
2. Semi-Shielded Design: A magnetic shield partially encloses the coil, containing most of the magnetic flux to reduce EMI radiation to nearby components while allowing sufficient cooling.
3. Saturation Behavior: At 2.9A saturation current, the ferrite core reaches magnetic saturation, causing inductance to drop by 30% from its initial value. Beyond this point, the inductor loses its energy storage effectiveness.
4. Frequency Response: The 31MHz self-resonant frequency is determined by the parasitic capacitance between windings. Below SRF, the component behaves as an inductor; above SRF, it becomes capacitive.

Pin Name Function
1 Terminal 1 Inductor terminal (non-polarized)
2 Terminal 2 Inductor terminal (non-polarized)
  • Output inductor for synchronous buck converters (e.g., 5V to 1.2V at 2A)
  • EMI filter inductor in switching power supply input stages
  • Energy storage element in boost converter LED driver circuits
  • Power line noise filtering in automotive electronic modules
  • Battery management system current smoothing
Manufacturer Part Number Package Notes
NIC Components NPIS43LS4R3MTRF 4.0×4.0×3.0mm 4.3µH, 2.95A Isat
NIC Components NPIS43LS5R6MTRF 4.0×4.0×3.0mm 5.6µH, 2.6A Isat
Coilcraft XAL4040-472ME 4.0×4.0mm 4.7µH, 3.5A Isat, shielded
Taiyo Yuden NR4040T4R7N 4.0×4.0mm 4.7µH, 3.0A Isat
Bourns SRP4020TA-4R7M 4.0×4.0mm 4.7µH, 3.0A Isat
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Contact Information

Email: info@ic-vendor.com

Tel / WhatsApp: +86 13760382860

Service & Packaging

Materialparts is a professional electronic component supplier based in Shenzhen, China, with over 20 years of global trading experience. We integrate component procurement, quality inspection, technical support, customized packaging, and global delivery services to provide one-stop supply chain solutions. Our business covers industrial control, automotive electronics, consumer electronics, medical devices and other industries. We always adhere to genuine sources, stable supply and considerate after-sales service.

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Contact Information

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Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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