nVent RAYCHEM Raystat-EX-03 electronic trace heating thermostat


The Raystat-EX-03 is a hazardous area electronic surface sensing thermostat providing accurate temperature control for heating cables.

The Raystat EX-03 unit can be supplied at nominal voltages of either 110 V 50/60 Hz or 230 V 50/60 Hz and has a double pole switch rated at 16 A. The switch contacts can be arranged to be volt free. The temperature setting is set via digital thumb wheel switches inside the enclosure. The thermostat is supplied with a PT100 sensor with a 2 m long stainless steel cable.

Technical Specifications

Area of useHazardous area: Zone 1 or Zone 2 (Gas) or Zone 21 or Zone 22 (Dust) &Ordinary
Temperature range0°C to 499°C
Ambient temperature range–50°C to +55°C
Output relayDual pole change overtype (DPDT) (optional volt free)
Switching capacity16 A 110 Vac ±10% 50/60 Hz resistive load
Supply voltage110 Vac ±10% 50/60 Hz  230/253 Vac ±10% 50/60 Hz


Installation Manuals
Connection and Protection