
Surge Protection Devices (SPDs)
Roxburgh's SPDs are suitable for signal line protection, DC power supply and low voltage power distribution
This range of Surge protectors reduce the transient overvoltages inside a facility or equipment, protecting against the indirect effects of lightning, and transients which originated within the facility.
All cables leaving a building can also provide a route back into the building, therefore, protection must be installed on: Mains Power Supplies (including UPS Class C and Class B); Data Communications and Local Area Network Cables; Signal, Control, Instrumentation and Alarm Lines; Telephone and Telemetry Lines.


The Class B series of over-voltage surge protective devices has been developed to protect against partial direct and indirect lightning discharges and is intended to provide protection in zones 0A – 1, per IEC 62305.
Category IEC / EN / VDE: Class I, II / Type 1, 2 / B + C. This range incorporates remote signalling contacts for central monitoring of SPD health.
DVSB275652TNS for TNS single phase networks with separate N and PE conductors.
DVSB400654TNS (65kA) for TNS three phase networks with separate N and PE conductors.
DVSB4001004TNS (100kA) for TNS three phase networks with separate N and PE conductors.
DVSB4001004TT for TT three phase networks, where N to PE galvanic isolation is required.
Product Variants
Part No. | Description | |
---|---|---|
DVSB275652TNS | DVSB275652TNS Class B Surge Protection Device Single Phase TNS 65KA |
DVSB400654TNS | DVSB400654TNS Class B Surge Protection Device Three Phase TNS 65KA |
DVSB4001004TT | DVSB4001004TT Class B Surge Protection Device Three Phase TT 100KA |
DVSB4001004TNS | DVSB4001004TNS Class B Surge Protection Device Three Phase TNS 100KA |
DVSB400653TNC | DVSB400653TNC Class B Surge Protection Device Three Phase TNC 65KA |
DVSB4001003TNC | DVSB4001003TNC Class B Surge Protection Device Three Phase TNC 100KA |
The Class C series of over-voltage surge protective devices has been developed to protect against the effects of indirect lightning discharges and induced voltages and is intended to provide protection in zones 1 2 per IEC 62305.
DVSC27545 consists of a high performance varistor block with thermal disconnection device. The plug-in module/base design facilitates replacement of a failed module in situ without the need to remove system wiring.
DVSC275452TNS series combines two 45kA varistor modules to provide protection for single phase TNS networks.
DVSC275452TT series combines a 45kA varistor and gas discharge tube to provide protection for TT single phase networks, where N to PE galvanic isolation is required.
DVSC400453TNC series combines three 45kA varistor modules, to provide protection for TNC three phase networks with a combined PEN conductor.
DVSC400454TNS series combines four 45kA varistor modules, to provide protection for TNS three phase networks with separate PE and N conductors.
DVSC400454TT series combines three 45kA varistor modules and a gas discharge tube, to provide protection for TT three phase networks, where N to PE galvanic isolation is required.
Product Variants
Part No. | Description | |
---|---|---|
DVSC275452TNS | DVSC275452TNS Class C Surge Protection Device Single Phase TNS 45KA |
DVSC400453TNC | DVSC400453TNC Class C Surge Protection Device Three Phase TNC 45KA |
DVSC27545 | DVSC27545 Class C Surge Protection Device Single Phase 45KA |
DVSC275452TT | DVSC275452TT Class C Surge Protection Device Single Phase TT 45KA |
DVSC400454TT | DVSC400454TT Class C Surge Protection Device Three Phase TT 45KA |
DVSC400454TNS | DVSC400454TNS Class C Surge Protection Device Three Phase TNS 45KA |
The Class C – DC power series – has been designed to meet the unique requirements of protection of DC power systems found in telepower and railway applications.
DVSC 24/48 provides both common and differential mode protection using high nominal discharge rating for extended operating life under DC conditions.
DVS – A range of DIN rail mounted voltage suppressors with 24V, 48V, 110V and 240V nominal operating voltages.
Product Variants
Part No. | Description | |
---|---|---|
DVS24 | DVS24 Din Rail Voltage Suppressor 24 Volts |
DVS48 | DVS48 Din Rail Voltage Suppressor 48 Volts |
DVS110 | DVS110 Din Rail Voltage Suppressor 110 Volts |
DVS240 | DVS240 Din Rail Voltage Suppressor 240 Volts |
DVSC2440 | DVSC2440 Class C Surge Protection Device DC 24V 40KA |
DVSC4840 | DVSC4840 Class C Surge Protection Device DC 48V 40KA |
The VSU range of voltage suppression units.
The VSU range of Voltage Suppression Units are available in single, three and three phase + neutral.
All products are RoHS compliant.
Product Variants
Part No. | Description | |
---|---|---|
VSU2W | VSU2W Voltage Suppression unit (External) Single Phase 275 Volts |
VSU3W | VSU3W Voltage Suppression unit (External) Three Phase 480 Volts |
VSU4W | VSU4W Voltage Suppression unit (External) Three Phase and Neutral 275 Volts |
Related Products
- SineTamer DC Range
- SineTamer AC - Single Phase
- SineTamer AC - 3 Phase
- Surge Protection Devices