485ELC_10

05039 Only One Name Means ProTek’Tion™ 485ELC HIGH SPEED ETHERNET DATA LINE PROTECTOR DESCRIPTION The 485ELC is low capacitance, two-stage transient voltage protector the provides primary and secondary protection against lightning, inductive switching and electrostatic discharge (ESD) transient threats. The first stage diverts the transient current through the ground terminal return path and the second stage clamps the voltage to a safe level without interruption of service. The 485ELC is designed to protect data lines, transmission lines, timing and control interface circuits from commonmode (line-to-ground) or differential (line-line) transients. Terminals 1 & 2 and 3 & 4 are designed as line pairs. A transient voltage suppressor is connected across each line pair for differential mode protection. 485ELC Capacitance over the operating voltage range is important. If capacitance is non-linear, distortion, loss of data or access to the I/O port can occur (See Figure 1). APPLICATIONS • • • • • Ethernet & Catagory 5 Systems RS-485 Serial Communication Lines ISDN Equipment/Systems Video Transmission Systems Smoke Detector & Fire Alarm Systems C - TvS Capactiance - pF 1,000 FIGuRE 1 TyPICAL LOw CAPACITANCE CuRvE FEATuRES • Compatible with IEC 61000-4-2 (ESD): Air - 15kV, Contact - 8kV • Compatible with IEC 61000-4-4 (EFT): 40A - 5/50ns • Compatible with IEC 61000-4-5 (Surge): 95A, 8/20µs, Level 4 (LineGnd) & 48A, Level 4 (Line-Line) • Low Capacitance - 25pF • Designed for EIA Standard RS-485 Data Lines • Permanent Two-Stage 2 Line Pair Protector • Subnanosecond Response Time • Common & Differential Mode Protection • Automatic Reset - Does Not Interrupt Service • Effective Against Lightning, Inductive Switching and ESD Industry Standard Low Capacitance TVS Protector 100 ProTek Device 10 0 MECHANICAL CHARACTERISTICS • Approximate Weight: 142 grams • Flammability Rating UL 94V-0 1 2 3 4 v(OP) - Circuit Operating - volts 5 05039.R4 12/10 Page 1 www.protekdevices.com 05039 Only One Name Means ProTek’Tion™ 485ELC TyPICAL DEvICE CHARACTERISTICS MAXIMuM RATINGS @ 25°C unless Otherwise Specified PARAMETER Peak Operating Line Voltage Operating Line Current Transient Voltage Transient Current - 8/20µs waveform Transient Current - 8/20µs waveform Operating Temperature Storage Temperature Response Time SyMBOL VOP IO TA TSTG - vALuE ±7 250 20 10 40 -55 to 100 -55 to 100