FB160

Silicon Avalanche Diodes Axial Leaded Telecommunications Transient Voltage Suppressors FOLDBAK™ SERIES Designed to protect sensitive telecommunications electronics from transients which originate from induced lightning, power cross and inductive load switching etc., especially where breakover devices would cause nuisance latch-up. Typical equipment would be: line cards, PABX, modems, multiplexers and NTDs. FEATURES • Foldback characteristics • 2200 watts Peak Power rated with 10/1000µS pulse • 30,000 watts Peak Pulse Power based on 8/20µS • UL 94V-0 flammability classification DESCRIPTION The foldback characteristic of this device eliminates the clamping of the DC current, or the battery, used in telecom systems, so latch-up is eliminated. Latch-up can occur with breakover devices due to the conduction follow-on current supplied by the DC system, after the device has responded to a transient. With breakover devices, latch-up will happen more readily as the ambient temperature rises because the holding current values will fall with rising temperature. The Foldbak eliminates this problem while still providing high levels of protection. Min 25.4 4.826 5.207 0.966 - 1.066 ABSOLUTE MAXIMUM RATINGS @25˚C case temp (unless otherwise noted) SYMBOL PPP PARAMETER Peak Pulse Current 10x1000µsec 8-20µsec Steady state power dissipation, lead length 9.5mm, TL - 85˚C (note 1) Junction temperature Storage temperature VALUE 2,200 20,000 5.0 -55 to 150 -55 to 150 Units W W W ˚C ˚C 9.155 9.527 Min 25.4 PM (AV) Tj T stg All dimensions in mm Note 1. Mounted on copper pad area 40mm square Characteristics @25˚C case temp (unless otherwise noted) DEVICE Working Maximum Maximum Minimum Maximum TYPE voltage breakover leakage foldback Peak Pulse Voltage current (Ir) voltage Vfb Current (lpp) (Vr) (Vbo) @ Vr @ Vcl Note 2 volts FB120 FB160 120 160 volts 170 220 µA 1.0 1.0 volts 55 110 amps 170 Ipp Vfb Ibo Irm Vbo Vrm 220 Note 2. Using 10/1000µS pulse 304 V-I Characteristic w w w. l i t t e l f u s e . c o m