Littelfuse AUML Series at Digi-Key Electronics

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Littelfuse'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.

  • 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