What are the key specifications of the LL4148?

Key specs include a 100V repetitive reverse voltage, 200mA average rectified forward current, and a fast reverse recovery time of 4.0ns.

What should engineers review before using the LL4148?

Engineers should verify the thermal limits (max junction temperature 200°C) and ensure the SOD-80 package is compatible with their PCB assembly process.

What are the sourcing risks for the LL4148?

The LL4148 is a mature, high-volume commodity component with excellent availability and low supply chain risk.

What is the pinout of LL4148?

Use the LL4148 datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about LL4148 pinout to locate pins, power rails, and interface signals before layout.

LL4148 Datasheet, Specs, Alternatives & ECAD | onsemi

AI summary

The LL4148 is a widely used, high-speed small signal switching diode in a SOD-80 package, suitable for general-purpose electronic applications.

Best for

General-purpose switching
Signal rectification
High-speed logic circuits

Avoid if

High-power rectification applications exceeding 200mA

Check before use

Polarity orientation
Thermal dissipation in high-density layouts

Key specifications

Reverse Voltage: 100 V
Forward Current: 200 mA
Reverse Recovery Time: 4.0 ns

Compliance & Environment

RoHS: ROHS3 Compliant
REACH: nan
MSL: nan
ECCN: EAR99
HTSUS: 8542.39.0001

Application

General PurposeSwitching

Datasheet

FAIR-S-A0002364043-1.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for LL4148: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol

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PCB Footprint

Land pattern for PCB layout

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3D Model

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Where to Buy

Real-time and catalog pricing from verified distributors

Alternative components

Part	Details	Match
US1MMDD	A functional alternative with higher voltage/current but in a different package and with slower switching speed.	Needs validation

Design and risk insights

Questions & answers

The LL4148 is a standard small signal switching diode manufactured by onsemi, commonly used in general-purpose applications requiring fast switching speeds.

RS1MMDD	A fast recovery diode with higher ratings but in a larger package and with much slower switching speed.	Needs validation
SS310MDD	A Schottky diode in a different package with no voltage margin; requires significant engineering review.	Needs validation

AI summary

Best for

Avoid if

Check before use

Key specifications

Compliance & Environment

Application

Datasheet

CAD Models

Where to Buy

Alternative components

Design and risk insights

Questions & answers

What is the LL4148?+×

What are the key specifications of the LL4148?+×

What should engineers review before using the LL4148?+×

What are the sourcing risks for the LL4148?+×

What is the pinout of LL4148?+×