485ELC Datasheet: HIGH SPEED ETHERNET DATA LINE PROTECTOR





485ELC HIGH SPEED ETHERNET DATA LINE PROTECTOR Datasheet

Part Number 485ELC
Description HIGH SPEED ETHERNET DATA LINE PROTECTOR
Manufacture Protek Devices
Total Page 5 Pages
PDF Download Download 485ELC Datasheet PDF

Features: 05039 C - TVS Capactiance - pF Only One Name Means ProTek’Tion™ HIGH SPEED ETHERNET DATA LINE PROTECTOR 485ELC 485ELC DESCRIPTION The 485ELC is low c apacitance, two-stage transient voltage protector the provides primary and sec ondary protection against lightning, in ductive switching and electrostatic dis charge (ESD) transient threats. The fir st stage diverts the transient current through the ground terminal return path and the second stage clamps the voltag e to a safe level without interruption of service. The 485ELC is designed to p rotect data lines, transmission lines, timing and control interface circuits f rom commonmode (line-to-ground) or diff erential (line-line) transients. Termin als 1 & 2 and 3 & 4 are designed as lin e pairs. A transient voltage suppressor is connected across each line pair for differential mode protection. Capacita nce over the operating voltage range is important. If capacitance is non-linea r, distortion, loss of data or access to the I/O port can occur (Se.

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Only One Name Means ProTek’Tion™
HIGH SPEED ETHERNET DATA LINE PROTECTOR
485ELC
485ELC
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 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.
Capacitance over the operating voltage range is important. If capacitance is non-linear, distortion, loss of data or ac-
cess 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
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 (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
MECHANICAL CHARACTERISTICS
Approximate Weight: 142 grams
Flammability Rating UL 94V-0
FIGURE 1
1,000 TYPICAL LOW CAPACITANCE CURVE
Industry
Standard Low
Capacitance TVS
Protector
100
ProTek Device
10
0
12
34
V(OP) - Circuit Operating - Volts
5
05039.R5 9/12
Page 1
ISO 9001: 2015 CERTIFIED

              






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