Product Overview

1N4148WT is a high conductance fast switching diode launched by ON Semiconductor (formerly Fairchild Semiconductor), designed specifically for high-frequency and miniaturized circuits. This product adopts the SOD523F ultra-thin surface-mount package with a height of only 0.70mm, suitable for high-density PCB layouts; its core advantage is a reverse recovery time (Trr) < 4.0nsec, enabling efficient fast switching operations. It also meets lead-free (Pb-free) and RoHS compliance requirements, has a Moisture Sensitivity Level (MSL) of 1, and features a wide operating temperature range of -55~+150℃. Widely used in consumer electronics, industrial control, communication equipment, etc., it is an ideal diode solution that balances performance, reliability, and environmental friendliness.

Key Features

• Ultra-Fast Switching Performance: Reverse recovery time Trr < 4.0nsec (Test Conditions: I_F=10mA, V_R=6.0V, I_RR=1mA, R_L=100Ω), significantly reducing switching losses and adapting to high-frequency circuit requirements.
• Extremely Miniaturized Package: Adopts SOD523F surface-mount package with a maximum package height of 0.70mm and small footprint, saving space for compact design products such as smartphones and wearable devices.
• Industrial-Grade Reliability: Operating junction temperature (T_J) and storage temperature (T_STG) ranges are both -55~+150℃, with Moisture Sensitivity Level (MSL) 1, no additional baking required, adapting to extreme temperature and humidity environments.
• Comprehensive Environmental Compliance: Uses Matte Tin lead plating, lead-free (Pb-free) design, fully compliant with RoHS standards, avoiding global environmental trade barriers.
• Low-Loss Electrical Performance: Extremely low reverse current (I_R), maximum 5μA at V_R=75V; diode capacitance (C_O) ≤ 4pF (Test Conditions: V_R=0, f=1MHz), reducing circuit leakage current and signal interference.

Technical Specifications

Typical Applications

• Consumer Electronics Power Management: In power modules of smartphones, tablets, and wireless earbuds, 1N4148WT acts as a fast rectifier or switching component. With its SOD523F ultra-thin package, it adapts to compact PCB layouts; the Trr < 4.0nsec fast switching feature reduces power conversion losses, and the low reverse current (I_R ≤ 25nA at V_R=20V) lowers static power consumption, helping devices improve battery life.
• Industrial Control Signal Conditioning: In PLC (Programmable Logic Controller) and sensor signal acquisition circuits, 1N4148WT’s -55~+150℃ wide temperature range and MSL 1 reliability can stably cope with harsh factory environments such as high temperature and humidity; the fast reverse recovery time ensures no delayed processing of sensor signals, improving the control accuracy and response speed of industrial equipment.
• Automotive Electronics Auxiliary Systems: In in-vehicle USB chargers and instrument panel backlight driver circuits, 1N4148WT complies with RoHS and lead-free standards, adapting to automotive environmental requirements; the Matte Tin lead plating enhances soldering reliability, and the ultra-thin package fits the narrow installation space of automotive electronics, serving as a freewheeling diode or voltage clamping component to ensure stable operation of in-vehicle devices.
• High-Frequency Signal Paths in Communication Equipment: In RF (Radio Frequency) signal modules of routers and switches, 1N4148WT’s C_O ≤ 4pF low capacitance feature reduces high-frequency signal attenuation; Trr < 4.0nsec ensures fast signal switching, avoiding communication delays; the wide temperature range adapts to the high and low temperature environments of outdoor communication base stations, improving the all-weather working stability of equipment.
• Portable Medical Electronics: In non-life-support medical devices such as blood glucose meters and blood pressure monitors, 1N4148WT’s high reliability and environmental design meet medical industry standards; the low forward voltage (V_F ≤ 1V at I_F=10mA) reduces device power consumption, adapting to battery-powered needs; the wide temperature range ensures accurate operation of devices in homes, clinics, and other environments.

Why Choose 1N4148WT ?

• Leading High-Frequency Performance: The reverse recovery time of Trr < 4.0nsec is more than 30% faster than ordinary switching diodes, adapting to high-frequency circuits above 100MHz, reducing energy loss during switching, and improving overall circuit efficiency, especially suitable for high-frequency power conversion and signal switching scenarios.
• High Space Utilization: The SOD523F package height ≤ 0.70mm is 40% thinner than the traditional SOD-123 package (about 1.1mm in height) with a smaller footprint, freeing up more space for high-density PCB design and helping consumer electronics and wearable devices achieve ultra-thinness.
• Extreme Environment Adaptability: The -55~+150℃ wide temperature operating range covers the temperature needs of industrial, automotive, and outdoor equipment; MSL 1 moisture sensitivity eliminates pre-production baking, reducing manufacturing complexity and minimizing product failure risks caused by environmental factors.
• Global Compliance Without Worry: Fully compliant with RoHS 2.0 and lead-free standards, the Matte Tin lead plating meets environmental regulations in major markets such as the EU, the US, and China, avoiding trade barriers and suitable for enterprises with global layouts.
• Balance of Cost and Performance: As a mature product line of ON Semiconductor (formerly Fairchild), 1N4148WT has stable mass supply and high consistency in electrical performance (e.g., small deviations in V_F and I_R), reducing product yield risks and after-sales costs, making it a cost-effective choice for mid-to-high-end circuits.

SUNTOP COMPANY INTRODUCTION

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