LCP1521S Datasheet Programmable transient voltage suppressor for SLIC protection Features Programmable transient suppressor Wide negative firing voltage range: V = -175 V max. Gn Low dynamic switching voltages: V and V FP DGL SO-8 Low gate triggering current: I = 5 mA max. GT Peak pulse current: I = 40 A (5/310 s) PP Holding current: I = 150 mA min. H Benefits: Line Line TIP or RING TIP or RING A Trisil is not subject to ageing and provides a fail-safe mode in short circuit 1 for a better protection. Gate (Gn) GND Trisils are used to help equipment to meet various standards such as UL60950, IEC 60950 / CSA C22.2, UL1459 and TIA-968-A (formerly FCC GND NC part 68) Line Line RING or TIP RING or TIP Trisils have UL94 V0 resin approved (Trisils are UL497B approved - file: E136224) Description These devices have been especially designed to protect new high voltage, as well as classical SLICs, against transient overvoltages. Product status link Positive overvoltages are clamped by 2 diodes. Negative surges are suppressed by 2 LCP1521S thyristors, their breakdown voltage being referenced to -V through the gate. BAT These components present a very low gate triggering current (IGT) in order to reduce the current consumption on printed circuit board during the firing phase. DS6608 - Rev 8 - July 2019 www.st.com For further information contact your local STMicroelectronics sales office.LCP1521S Characteristics 1 Characteristics Table 1. Standards compliance Minimum serial Peak surge Required peak Standard Voltage waveform Current waveform resistor to meet voltage (V) current (A) standard ( ) 2500 2/10 s 500 2/10 s 12 GR-1089 core first level 1000 10/1000 s 100 10/1000 s 24 GR-1089 core second 5000 2/10 s 500 2/10 s 24 level GR-1089 core intra- 1500 2/10 s 100 2/10 s 0 building 6000 150 110 ITU-T-K20/K21 10/700 s 5/310 s 1500 37.5 0 8000 ESD contact discharge 0 ITU-T-K20 (IEC 1/60 ns 61000-4-2) 15000 ESD air discharge 0 4000 10/700 s 100 5/310 s 60 IEC 61000-4-5 4000 1.2/50 s 100 8/20 s 0 TIA-968-A, 1500 10/160 s 200 10/160 s 22.5 lightning surge 800 10/560 s 100 10/560 s 15 type A TIA-968-A, lightning surge 1000 9/720 s 25 5/320 s 0 type B Table 2. Thermal resistance Symbol Parameter Value Unit R Junction to ambient 120 C/W th(j-a) DS6608 - Rev 8 page 2/13