AEC-Q200 Qualified Automotive Grade Surface Mount Multilayer Varistors - AUML Series

Littelfuse's AUML Series Multilayer Varistors are designed to protect systems from damaging voltage transients in vehicles

Image of Littelfuse's AUML Series Multilayer Varistors Littelfuse's AUML Series Multilayer Transient Surge Suppressors are designed to suppress the effects of damaging voltage transients in automobiles. The most common transient conditions arise from large inductive energy discharges. Electronic systems in automobiles such as anti-lock braking systems, direct ignition systems, engine controls, airbag control systems, wiper motor controls, etc. are susceptible to damage from these voltage transients and therefore require protection. AUML transient suppressors have temperature-independent suppression characteristics that provide protection from -55 °C to +125 °C.

AUML suppressors feature rugged protection and excellent transient energy absorption in a semiconducting ceramic small package. These devices are in the form of ceramic leadless chips with no lead inductance, while ensuring that the product achieves high-speed transient surge response. These suppressors require significantly less space and pads than silicon TVS diodes, giving designers greater board layout flexibility.

Varistor Products

Multilayer Varistor (MLV) Design Guidelines

characteristic

AEC-Q200 Compliant

RoHS compliant

Load dump energy to SAE J1113 specification levels

Leadless, Surface Mount Chip Format

Zero lead inductance

Various energy ratings

No temperature derating in environments up to +125 °C

High surge current capability

Low profile, compact industry standard die sizes (1206, 1210, 1812 and 2220 sizes)

Inherent two-way clamp

Non-plastic or epoxy encapsulation ensures flammability rating better than 94V-0 standard

application

Suppresses inductive switching or other transient events such as EFT and board level surge voltages

ESD protection of sensitive components according to IEC 61000-4-2 (Class 4), MIL-STD883C, Method 3015.7 and other industry specifications

On-board transient voltage protection for ICs and transistors

Helps achieve electromagnetic compatibility of end products

Replaces large surface mount TVS Zener devices in many applications