AUML Series - Multilayer Transient Voltage Surge Suppressor

Roll Over to Zoom
Disclaimer Notice

Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.

The AUML Series of Multilayer Transient Surge Suppressors was specifically designed to suppress the destructive transient voltages found in an automobile. The most common transient condition results from large inductive energy discharges. The electronic systems in the automobile, e.g. antilock brake systems, direct ignition systems, engine control, airbag control systems, wiper motor controls, etc. are susceptible to damage from these voltage transients and thus require protection. The AUML transient suppressors have temperature independent suppression characteristics affording protection from -55°C to 125°C. The AUML suppressor is manufactured from semiconducting ceramics which offer rugged protection and excellent transient energy absorption in a small package. The devices are available in ceramic leadless chip form, eliminating lead inductance and assuring fast speed of response to transient surges. These Suppressors require significantly smaller space and land pads than silicon TVS diodes, offering greater circuit board layout flexibility for the designer.

  • AEC - Q200 compliant
  • RoHS Compliant
  • Load Dump energy rated per SAE Specification J1113 
  • Leadless, surface mount chip form
  • “Zero” Lead Inductance 
  • Variety of energy ratings available
  • No temperature derating up to 125ºC ambient 
  • High peak surge current capability
  • Low Profile, compact industry standard chip size; (1206, 1210, 1812 and 2220 Sizes) 
  • Inherent bidirectional clamping 
  • No Plastic or epoxy packaging assures better than 94V-0 flammability rating

Access specifications, certifications, check availability and order parts below

V18AUMLA12061501206 (3216)4024.514183223CheckOrder
V18AUMLA12101501210 (3225)4024.514183223CheckOrder
V18AUMLA181211001812 (4532)4024.514183223CheckOrder
V18AUMLA222012002220 (5650)4024.514183223CheckOrder
V24AUMLA222011002220 (5650)602519243932CheckOrder
V48AUMLA222012002220 (5650)10525404866.554.5CheckOrder

pdf icon Automotive Electronics Circuit Protection Applications Matrix

Littelfuse portfolio of AEC-Q101 (TVS Diodes and Diode Arrays) and AEC-Q200 (Varistors, Multi Layer Varistors and PPTCs) qualified components help to protect the growing number of electronic applications in modern vehicles.

Littelfuse_Dongguan BeiCe MOV_ISO TS16949icon Dongguan BeiCe ISO TS16949

Littelfuse_Dongguan BeiCe MOV_ISO14001 2004icon Dongguan BeiCe ISO 14001 2004

MOV Factory

Littelfuse_Dongguan BeiCe MOV_ISO9001 2000icon Dongguan BeiCe ISO 9001 2000

MOV/MLV Factory

pdf icon Varistor AUML Datasheet

The AUML Series of Multilayer Transient Surge Suppressors was specifically designed to suppress the destructive transient voltages found in an automobile...

Littelfuse ML Multilayer Surface Mount Surge Suppressors Application Note

This application note focuses on the ML version multilayer suppressor. Littelfuse produces four families of multilayer suppressor, including the ML, MLE, MLN and AUML. Much of the information presented here is generic to all four.

pdf icon Soldering Recommendations for Surface Mount and Multilayer Metal Oxide Varistors Application note

This application note discusses recommendations for soldering surfacemount. MMOVcomponents. Surface mount technology has the advantages of lower costs, increased reliability and the reduction in the size and weight of components used. With these advantages, surface mount technology is fast becoming the norm in circuit design.

AN9312 Suppression of Transients in an Automotive Environment

This application note discusses suppression of transients in the automotive environment. The circuit designer must ensure reliable circuit operation in this severe transient environment. The transients on the automobile power supply range from the severe, high energy, transients generated by the alternator/regulator system to the low-level "noise" generated by the ignition system and various accessories.

pdf icon The ABCs of Littelfuse Multilayer Suppressors Application Note

This application guide is similar to The ABCs of MOVs', offering specific information on Multilayer suppressor device technology and is intended to be a supplement to the Littelfuse Multilayer data sheets. Applications are covered, giving general examples of where these products are used. The Basics, describes the fundamental fabrication, operation and functions. And Common Questions addresses frequently asked questions from Production Engineers, and Designers.

pdf icon AEC Q200 Varistor Selection Guide

Examples of automotive applications and qualified varistors

AN9768 Transient Suppression Devices and Principles

This application note discusses the two major categories of transient suppressors: a) those that attenuate transients, thus preventing their propagation into the sensitive circuit; and b) those that divert transients away from sensitive loads and so limit the residual voltages.

AN9769 An Overview of Electromagnetic and Lightning Induced Voltage Transients

This application note is an overview of the sources and nature of various transient overvoltages, and the problems that may result.

Varistors ML SPICE Model OLB

pdf icon Product Selection Guide

Electronics Circuit Protection Product Selection Guide - A guide to selecting Littelfuse circuit protection components for electronic applications...

pdf icon Circuit Protection Technology Application Matrix

Littelfuse is the world leader in the design and manufacturing of fuses for the automotive, industrial, handheld, computer and telecom markets...

pdf icon Varistors Catalog

Catalog with varistors, metal oxide varistors, multilayer varistors, MLVs, surface mount varistors, radial lead varistors, disc varistors, industrial varistors, high energy varistors...