Overview

485ELC

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 common-mode (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.
Custom Module
Release Date: December 1, 1994
Rev. Date: September 29, 2020
Rev No.: 6

SERIES FEATURES

IEC 61000-4-2 (ESD): Air - 15kV, Contact - 8kV
IEC 61000-4-4 (EFT): 40A - 5/50ns
IEC 61000-4-5 (Surge): 8/20µs - 95A, Level 4 (Line-Gnd) & 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

APPLICATIONS

Ethernet - 10/100 Base T
Catagory 5 Systems
RS-485 Serial Communication Lines
ISDN Equipment/Systems
Video Transmission Systems
Smoke Detector & Fire Alarm Systems

Electrical Characteristics

Safeguard Your Interface

Part Number Stand-off Voltage
VWM
Volts		 Clamping Voltage
VC
Volts		 Peak Current
IPP
Amps		 Leakage Current
IR
µA		 Resistance
Ohms		 Capacitance
C
pF		 Lines
485ELC7.0020.00500.0010.0012.0025.001