Automotive AEC-Q200 SMT Multilayer Varistors - AUML Series

Littelfuse's AUML series of multilayer varistors are designed to protect against destructive transient voltages in automobiles

Image of Littelfuse's AUML Series Multilayer VaristorsLittelfuse's AUML series of multilayer transient surge suppressors is 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.

Varistor Products

Multilayer Varistors (MLVs) Design Guide

  • 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 +125°C 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
  • Suppression of inductive switching or other transient events such as EFT and surge voltage at the circuit board level
  • ESD protection for components sensitive to IEC 61000-4-2 (Level 4), MIL-STD883C, Method 3015.7, and other industry specifications
  • Provides on-board transient voltage protection for ICs and transistors
  • Used to help achieve electromagnetic compliance of end products
  • Replace larger surface mount TVS Zeners in many applications

AUML Series Multilayer Varistors

ImageManufacturer Part NumberDescriptionMaximum AC VoltsMaximum DC VoltsAvailable QuantityView Details
VARISTOR 27.5V 1206V18AUMLA1206NHVARISTOR 27.5V 120614V18V3155 - Immediate
7500 - Factory Stock
View Details
VARISTOR 27.5V 2220V18AUMLA2220HVARISTOR 27.5V 222014V18V6123 - ImmediateView Details
VARISTOR 27.5V 1210V18AUMLA1210HVARISTOR 27.5V 121014V18V645 - Immediate
28000 - Factory Stock
View Details
VARISTOR 27.5V 1812V18AUMLA1812HVARISTOR 27.5V 181214V18V4150 - ImmediateView Details
VARISTOR 35.5V 2220V24AUMLA2220HVARISTOR 35.5V 222019V24V715 - Immediate
3000 - Factory Stock
View Details
VARISTOR 60.5V 2220V48AUMLA2220HVARISTOR 60.5V 222040V48V3667 - ImmediateView Details
VARISTOR 16V 42VC AECQ 2220V16AUMLA2220NSVARISTOR 16V 42VC AECQ 222016V21.6V576 - ImmediateView Details
Updated: 2019-09-04
Published: 2018-03-20

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Metal Oxide Varistors
The basic operation, electrical characteristics, and applications of Littelfuse's Metal Oxide Varistors.