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1N4148WS

75V 150mA fast switching diode, 4ns trr, SOD-323FL, onsemi, SMD equivalent of 1N4148

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Manufacturer Part：

1N4148WS

Package：

SOD-323FL (Case 477AB) 2.5×1.25×0.9mm

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Description

Product Overview

The onsemi 1N4148WS is a small-signal silicon switching diode in a SOD-323FL (flat lead) surface mount package. With 75V repetitive reverse voltage, 150mA average rectified current, and fast reverse recovery time of 4ns, it is the SMD equivalent of the classic 1N4148 through-hole diode. The compact package and fast switching make it ideal for general-purpose switching and signal processing.

Key Specifications

Repetitive Peak Reverse Voltage (VRRM) 75 V (onsemi), 100 V (some manufacturers)
Non-Repetitive Peak Reverse Voltage (VRSM) 100 V
Average Rectified Current (IO) 150 mA
Repetitive Peak Forward Current (IFRM) 300 mA
Non-Repetitive Peak Forward Surge Current (IFSM) 1.0A (t=1s), 4.0A (t=1µs)
Forward Voltage (VF) 1.0V (max at IF=10mA), 1.25V (max at IF=150mA)
Reverse Current (IR) 25nA (max at VR=20V), 5µA (max at VR=75V)
Reverse Recovery Time (trr) 4.0 ns (max)
Junction Capacitance (Cj) 4.0 pF (at VR=0V, f=1MHz)
Power Dissipation 200 mW (at TA=25°C)
Operating Temperature -55°C to +150°C
Package SOD-323FL (Case 477AB)

Features

  • Fast switching: trr = 4ns maximum
  • Ultra-small SOD-323FL flat-lead package for high-density assembly
  • MSL Level 1 (unlimited floor life)
  • Matte tin (Sn) lead finish — Pb-free and RoHS compliant
  • Green mold compound
  • General-purpose switching diode for signal and logic applications
  • Low junction capacitance: 4pF

Applications

  • General-purpose switching circuits
  • Signal routing and logic gates
  • Reverse polarity protection (low current)
  • Free-wheeling diode for small relays
  • Clipping and clamping circuits
  • Mixing and detection in RF circuits

The onsemi 1N4148WS is a small-signal silicon epitaxial planar switching diode in a SOD-323FL surface mount package. As the SMD equivalent of the ubiquitous 1N4148 through-hole diode, it offers 75V repetitive reverse voltage, 150mA average rectified current, and an ultra-fast 4ns reverse recovery time. The flat-lead SOD-323FL package measures only 2.5×1.25×0.9mm, enabling high-density PCB assembly. With low junction capacitance (4pF), low reverse leakage (25nA at 20V), and MSL Level 1 rating, it is the go-to device for general-purpose signal switching, logic circuits, and protection applications.

The 1N4148WS is a PN junction diode manufactured using silicon epitaxial planar technology. Under forward bias (anode positive relative to cathode), current flows once the forward voltage exceeds approximately 0.7V (at 10mA), as charge carriers (electrons and holes) cross the PN junction. Under reverse bias, the depletion region widens and blocks current flow (only small leakage current of 25nA at 20V). The fast switching characteristic (trr=4ns) is achieved through gold doping of the silicon, which introduces recombination centers that rapidly clear stored minority carriers when the diode transitions from forward to reverse bias. This gold-doping process distinguishes switching diodes from rectifier diodes, which have much longer trr (microseconds) but lower leakage. The epitaxial construction ensures uniform breakdown characteristics and low noise.

Pin Description(Output pin definitions in table format only; return pure content without derivation or extra elaboration)

Application Scenarios (Output pin definitions in table format only; return pure content without derivation or extra elaboration)

1N4148W (SOD-123, larger package, higher current); BAV99 (dual diode, SOT-23); 1N4148 (DO-35 through-hole, original); MMSD4148 (SOD-123FL); CMOD4148 (various manufacturers, SOD-323)

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Quality is the core foundation of our long-term global cooperation. With over 20 years of experience in the electronic component industry, Materialparts has built a strict and standardized quality management system covering component sourcing, incoming inspection, full-batch testing, packaging and delivery. We are committed to delivering 100% genuine, high-reliability electronic components for industrial control, automotive electronics, consumer electronics and medical device industries, and fully safeguarding your production and R&D projects.

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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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Email: info@ic-vendor.com
Tel / WhatsApp: +86 13760382860
Address: Room 2919, Guoli Building, Huaqiang North, Futian District, Shenzhen, Guangdong, China
 

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