SSRP130B1 Datasheet | STMicroelectronics

DESCRIPTION The SSRP130B1 is a dual asymmetrical transient voltage suppressor designed to protect a solid-state ring relay or SLICs with integrated ring generator from overvoltages. The asymmetrical protection configuration is necessary to allow the use of all different types of ringing schemes. FEATURES Dual bidirectional asymmetrical protection : Stand-off voltages : + 130V for positive voltages - 185V for negative voltages Peak pulse current : IPP = 2 - 25A (5 / 310 µs) Holding current : 150m A SO8 FUNCTIONAL DIAGRAM RING PLIES WITH THE FOLLOWING STANDARDS: ITU-T K20 VDE0433 VDE0878 IEC 1000-4-5 FCC Part 68 BELLCORE TR-NWT-001089 Peak Surge Voltage (V) 1000 2000 1500 Level 2 1500 800 2500 1000 Voltage Waveform (µs) 10/700 10/700 1.2/50 10/700 1.2/50 10/160 10/560 2/10 10/1000 Current Waveform (µs) 5/310 5/310 1/20 5/310 8/20 10/160 10/560 2/10 10/1000 Admissible Ipp (A) 25 25 35 25 25 29 21 70 15 Necessary Resistor (Ω) 40 3 45 30 30 57 TM: ASD is trademarks of STMicroelectronics. July 1998 - Ed: 4A APPLICATION INFORMATION Fig 1 : Topologyof the classical line card protection. Fig 2 : Classical use of the SSRP130B1. PTC R PTC R Tip Tip 2nd 1st LINE PTC stage SLIC Line stage SLIC PTC R (- ) Ring Ring Ring generator (- ) SLIC with integrated ring generator or solid state relay. The classical line card requires protection before the ring relay and a second one for the SLIC (fig.1). The use of new SLICs with integrated ring generator or board based on solid state ring relay suppresses this second protection (Fig. 2). Then the only remaining stage, located between the line and the ring relay, has to optimize the protection. The classical symmetrical first stage protector bees not sufficient to avoid any circuit destructionduring surges. The SSRP130B1 device takes into account this fact and is based on asymmetrical voltage characteristics (Fig.3a). The ring signal being...