Surge Protection Devices

AC Power Protection

ERICO’s CRITEC® brand of AC panel protection are designed for electrical service panels, motor control and other switchboards.

Data, Control and Signal Line Protection

Surge Protection Devices (SPDs) for process control, computer, telephone and wireless communications applications.

Miscellaneous Products

Equipotential bonding products and Surge Protection Devices for pipeline insulated joints.


CRITEC® PEC – Potential Equalization Clamp

Provides equipotential bonding of ground systems under transient conditions, but for noise protection allows grounds to be separate under normal conditions.

Data, Control & Signal Line Protection

CRITEC® CCTV – Closed Circuit Television Protector

Protects security cameras and other video circuits. Simple BNC connection.

CRITEC® CSP Series – Coaxial Surge Protector

Protection of wireless communication equipment connected with BNC or N type coaxial connectors. Up to 3GHz.

CRITEC® DEP Series – Data Equipment Protector

Plug in protection for DB9 and DB25 circuits. Applications include RS232, RS423, RS422 & RS485.

CRITEC® DSD(DC) Series – DIN Surge Diverter

Protection of 12V, 24V and 48V power supply and control circuits. Applications include fire, security and DC powered communication systems.

CRITEC® LAN RJ45 – Local Area Network Protector

Plug in protection for Cat 5 Ethernet LAN networks. Connects to UTP systems with RJ45 connectors.

CRITEC® RTP – Remote Transmitter Protector

Protection of field installed 4-20mA connected transducers & transmitters.

CRITEC® UTB Series – Universal Transient Barrier

Data, signaling and LV supply protection. Applications include RS232, 422, 423, 485, 4-20mA, 0-10, 0-20V, telephone circuits, fire & security systems, transducers, modems and industrial circuits.

UTB Compact Series – Universal Transient Barrier

The UTB (Universal Transient Barrier) Compact series provides transient protection for equipment from surges induced onto balanced pair signal lines or low voltage AC or DC power supplies.

CRITEC® LCP – Load Cell Protector

Protection of load cells in weigh bridges, scales, cranes, silos and other industrial weight measurement systems. Can be used on any strain gauge system.


The SLP and HSP series are for Krone-LSA connected telephone and high speed data circuits. DLT provides screw terminal connection.

CRITEC® SLP1 RJ11 Series

The SLP1 RJ11 is for the protection of RJ11 connected telephone circuits, including DSL.

AC Power Protection

CRITEC® SES200 Series – Service Entrance Standard SPD

Features 200kA surge rating, TD technology, alarm contacts, LED percentage status display. Optional filter, counter and metal enclosure.

CRITEC® TDS-MPM – MOVTEC Protection Module

Features 200kA surge rating, TD technology, alarm contacts, LED percentage status display.

CRITEC® TSG-SRF Series – Triggered Spark Gap SRF

High performance surge protection and in-line series filtering. Load currents 40 to 2000A supported.

TDX Compact Series

The CRITEC® TDX Compact Series of Transient Voltage Surge Suppressors for equipment, panel and motor protection applications provides long life, even under the most adverse over-voltage conditions.


Connects to TDF opto-coupler outputs to provide potential free Form C alarm contacts.

CRITEC® DSD140 (40kA) Series – DIN Surge Diverter

DIN rail mount modular 40kA SPD. Indication and contacts.

CRITEC® DSD160 (60kA) Series – DIN Surge Diverter

DIN rail mount modular 60kA SPD. Indication and contacts.

CRITEC® DSD340, 380 Series – DIN Three Phase Surge Diverter

DIN rail mount three phase SPD. 40 & 80kA units for 240/415 systems. Indication and contacts.

CRITEC® DSF Series – DINLINE Surge Filter

Surge protection and in-line (series) filtering. 6 and 20A Load currents. Indicator, DIN rail mount.

CRITEC® SGD – Spark Gap Diverter

The SGD series of spark gap surge diverters are for equipotential bonding of neutral and earth in TT power distribution systems.

CRITEC® TDF Series – Transient Discriminating Filter

High performance surge protection and in-line (series) filtering. 3, 10 and 20A load currents. TD technology, indicator and alarm output. DIN rail mount.


Single and three mode protection units. Designed for inclusion in motor control and electrical panels. Up to 100kA surge rating, contacts and LED progressive status indication.

CRITEC® TDSSC – Surge Counter

Non-resettable surge counter

CRITEC® TSG Series – Triggered Spark Gap SPD

DIN rail mount triggered spark gap. 130kA surge rating. Triggering enables let-through voltage of under 1500V to be achieved. Superior follow current control allows use on line voltages.

CRITEC® PLF Series – Enhanced Powerline Filter

Plug-in solutions for protection of office equipment. 10A Australian AC sockets with telephone/data protection options. British and German options available.