Only One Name Means ProTek’Tion™
TEL185B
&
TEL185E
TELEPHONE INTERFACE PROTECTOR
APPLICATIONS
✔ Telcom Equipment Connected to Telcom Lines
✔ Line Connected Modems & Fax Machines
✔ Remote Telephone Extensions
✔ Private Wire/Leased Phone Lines
IEC COMPATIBILITY (EN61000-4)
✔ 61000-4-2 (ESD): Air - 15kV, Contact - 8kV
✔ 61000-4-4 (EFT): 40A - 5/50ns
✔ 61000-4-5 (Surge): 8/20µs - 95A, Level 4 (Line-Gnd) & 48A, Level 4 (Line-Line)
FEATURES
✔ Designed for ±185 Volt (Peak) Telephone Lines
✔ 4 Wire, Line-to-Ground Protection
✔ Permanent Two-Stage Protection
✔ Subnanosecond Response Time
✔ Automatic Reset - Does Not Interrupt Service
✔ Effective Against Lightning, Inductive Switching and ESD
MECHANICAL CHARACTERISTICS
✔ Weight: TEL185B - 28 grams & TEL185E - 142 grams (Approximate)
✔ Flammability Rating UL 94V-0
✔ Device Marking:
Case - Logo, Terminal Designations & Part Number
Board - Logo, Date Code & Part Number
DESCRIPTION
The TEL185B/E is a two-stage transient voltage protector that 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 TEL185B/E is designed to protect telcom lines from common mode (line-to-
ground) transients. There are four (4) independent lines referenced to the ground
terminals.
TEL185B
TEL185E
05050.R3 11/03
1
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