Quietly powerful, Murata LQW43FT series reshapes RF coils for 5G designs

Reviewed: ad hoc news Software & Services desk. Edited and checked on 2026-06-18, 05:52. Details in the imprint.

Murata's LQW43FT series is one of those components you barely see on the PCB, yet it decides whether a 5G radio front end stays cool and clean or starts misbehaving under load. Tiny, dark, wire-wound coils that quietly carry surprisingly high RF currents.

What makes this coil special

The LQW43FT series is a family of wire-wound RF inductors in a 1812 footprint that aims at high-current applications such as 5G base stations, optical network equipment and server boards. According to Murata's official product page, it supports currents up to around 1.7 A depending on inductance value.

Engineers get a broad inductance range roughly from the low nano-Henry region up into several hundred nano-Henry, covering typical matching, choke and filter roles in RF paths. The components are magnetically shielded, which helps keep crosstalk in dense layouts under control.

Daily design work with LQW43FT

On the bench, parts like the LQW43FT series feel like small, robust bricks - 4.5 mm by 3.2 mm, still hand-solderable in a pinch but clearly at home in automated reflow. The rectangular, ferrite-like body looks unremarkable, yet the datasheet power ratings invite confident current budgeting.

For layout engineers, the shielded construction and relatively tight tolerance reduce the usual dance around unexpected coupling or detuning in compact RF modules. That can translate into fewer board spins when integrating power-hungry 5G or Wi-Fi 7 chipsets close to their matching networks.

Performance, loss and heat

Murata specifies low DC resistance and Q values tailored for high-frequency use, which is crucial when every tenth of a dB insertion loss matters. In practice that means less heat on crowded RF boards and more margin before power amplifiers start complaining.

The high rated current of the LQW43FT series compared with many legacy inductors gives designers room to handle power bursts from modern radios and high-speed SerDes rails. It is a quiet form of robustness - no LEDs, no fan noise, just a cooler RF path under full load.

Where it fits in Murata's lineup

Murata frames the LQW43FT series as part of its wider portfolio of RF chip inductors and noise-suppression parts that feed into smartphones, base stations and increasingly AI server platforms. That context matters as AI and 5G push demand for high-end multilayer and wire-wound components upward.

Compared with tiny 0603 or 0402 inductors, the 1812 size clearly targets infrastructure and industrial boards rather than slim handsets. Designers trading board area for higher current and better thermal behavior are the natural audience here.

Availability and tools for designers

The LQW43FT series is offered as a standard catalog product through Murata distributors and global electronics channels, typically in tape-and-reel quantities for automated assembly. Major distributors in Europe and Asia list multiple inductance values with short lead times.

Simulation support is increasingly a selling point. Murata recently highlighted collaborations bringing detailed simulation models of its components into tools from Ansys and Synopsys, easing pre-layout design for power integrity and RF paths. Designers can sketch out LQW43FT-based filters virtually before committing to board prototypes.

Company backdrop and stock note

Murata Manufacturing leans heavily on advanced capacitors, inductors and RF modules, and recent analyst commentary points to strong demand for high-performance passives in AI servers and data centers. That broader components ecosystem is precisely where series such as LQW43FT sit.

Shares of Murata Manufacturing (JP3932000007) trade on the Tokyo Stock Exchange in Japanese yen.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.