Power Electronics
The varistors are available with 2500V hipot encapsulation for epoxy coatings and 500V for phenolic coatings Image courtesy of Littlefuse

The varistors are available with 2500V hi-pot encapsulation for epoxy coatings, and 500V for phenolic coatings. (Image courtesy of Littlefuse).

Varistors Suited for DC and Automotive Applications

Littelfuse AUMOV Series varistors offer 50% greater surge withstanding capability than existing technologies for low dc voltage applications. The maximum peak surge current is rated up to 5KA (8/20µs pulse) to protect sensitive automotive systems from voltage transients induced by load dump and other transient events. This AEC-Q200 (Table 10) compliant series is available in five disc sizes: 5mm, 7mm, 10mm, 14mm and 20mm.

Features:   

  • Operating range from 14VAC to 42VAC and 16VDC to 50VDC         
  • Non-Repetitive Surge Current, 8/20µs Waveform (ITM) 400 to 5,000 A     
  • Non-Repetitive Energy Capability, 2ms Waveform (WTM) 1.0 to 140 J      
  • Operating Ambient Temperature Range (TA) for Epoxy coated -40 to +85 °C        
  • Operating Ambient Temperature Range (TA) for Phenolic coated -40 to +125 °C    
  • Storage Temperature Range (TSTG) for Epoxy coated -40 to +125 °C       
  • Storage Temperature Range (TSTG) for Phenolic coated -40 to +150 °C    
  • Temperature Coefficient (µV) of Clamping Voltage (VC) at Specified Test Current <0.01% °C      
  • Hi-Pot Encapsulation (Isolation Voltage Capability) for Epoxy coated 2500 V    
  • Hi-Pot Encapsulation (Isolation Voltage Capability) for Phenolic coated 500 V  
  • Epoxy Coating Insulation Resistance >1,000 MW

Benefits:         

  • Low voltage varistor design provides high peak surge current rating    
  • Reduced footprint and volume required for surge protection     
  • Optional phenolic coating for higher operating temperature up to 125 °C        
  • High resistance to thermal cycles for phenolic coating         
  • High energy absorption particularly for automotive load dump and jump start    
  • Lead-free, Halogen-Free and RoHS compliant Applications        
  • Body Electronics Systems       
  • Powertrain Systems    
  • Infotainment Systems   
  • Automotive Control 
TAGS: Automotive
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