SD and SD-C Series 450 W TVS Diode Array

By Littelfuse Inc 109

SD and SD-C Series 450 W TVS Diode Array

The Littelfuse 450 W SD (unidirectional) and SD-C (bidirectional) series general-purpose TVS Diode Arrays (SPA® Devices), are designed to replace multilayer varistors (MLVs) for protecting electronic equipment from damage due to electrostatic discharge (ESD) and other transient events. Unlike ceramic devices, which have an inherent wear-out factor, these new devices are made of silicon diodes, which allow them to absorb repetitive ESD strikes or surge transients safely without performance degradation. Their low-dynamic resistance provides up to a 50% reduction in clamping voltage when compared with competing technologies, and they can safely dissipate induced surge currents up to 30 A. Typical applications of these devices include point-of-sale terminals, test equipment or instrumentation, medical equipment, desktop and notebook computers, servers, computer peripherals, and more.

  • Lightning: IEC61000-4-5, 30 A (tp=8/20 μs)
  • ESD: IEC61000-4-2, ±30 kV contact discharge
  • Low-dynamic resistance of only 0.5 Ω for the SD and 0.6 Ω for the SD-C
  • Low-leakage of 1 µA max
  • No inherent wear-out factor
  • SOD-323 package fits existing 0805 PCB footprints
  • Robust surge and enhanced ESD protection helps equipment manufacturers comply with, and exceed regulatory standards, extending equipment life and system up-time
  • Provides up to a 50% reduction in clamping voltage compared to competing technologies, making them ideal for protecting modern electronics
  • Up to a 97% decrease in leakage current compared to previous technologies, greatly increasing battery life
  • Capable of handling multiple ESD strikes or surge transients without performance degradation compared to ceramic devices, making for a more robust design
  • Offers flexibility to the manufacturer to replace existing 0805 MLVs without requiring a PCB or solder pad change

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