Civaux CHR25 Semiconductor PTC Enclosure Heater (25W)

The Civaux CHR25 is an industrial grade, semiconductor PTC (Positive Temperature Coefficient) enclosure heater. It is engineered to maintain stable thermal conditions inside electrical cabinets, automation control panels, and instrument housings.

Generating a continuous thermal output of 25W, it is primarily used to prevent condensation build up and protect sensitive electronic components from freezing in cold environments.

Key Features

Self Regulating PTC Technology: Utilizes an advanced semiconductor PTC thermistor element. As the ambient cabinet temperature rises, the electrical resistance of the PTC element increases automatically, naturally limiting the current draw and heat output. This self regulating capability prevents localized overheating and eliminates the risk of thermal runaway.
Optimized Extruded Anodized Profile: Enclosed within a dark, deeply grooved extruded aluminum profile housing. The vertical fins create a large surface area that maximizes natural convection currents, drawing cool air up from the bottom of the panel and distributing warm air evenly throughout the enclosure.
Touch Safe Control Connection Block: Features a heavily insulated, flame retardant 3 pole terminal block positioned at the base of the heating unit. The terminal layout is explicitly screen printed with clear installation identifiers (L for Line, N for Neutral, and the Earth Ground symbol) to facilitate safe integration.
Space Saving DIN Rail Mounting: Designed with a built in rear mounting clip that snaps directly onto standard 35 mm DIN rails (EN 60715). This compact layout allows it to fit neatly in tight spaces at the bottom of the cabinet without obstructing nearby electronic components.

Technical Specifications

Feature	Specification
Model / Type Code	CHR25
Brand / Manufacturer	Civaux / Civaux Electric
Heating Element Type	Semiconductor PTC Resistor
Heating Capacity / Power Output	25 W (at an ambient temperature of 20 degrees Celsius)
Operational Voltage Range	Universal 110V to 250V AC/DC (Adjusts automatically to grid levels)
Inrush Current Maximum	Approximately 1.5 A to 2.0 A during initial power-up phase
Radiator Base Body Material	Extruded aluminum profile, anodized finish
Connection Terminal Matrix	3 pole screw terminal block for wires up to 2.5 square millimeters
Mounting Orientation	Vertical convection placement on standard 35 mm DIN rail
Ingress Protection Guard	IP20 (Finger safe connections)
Certifications & Standards	CE Compliant, RoHS Directive

Applications

Control Panel Anti Condensation Protection: Paired with an NC thermostat (such as the Civaux CTC01) to warm cabinet interiors above the dew point, preventing destructive moisture condensation on PLC boards, terminal points, and communication modules.
Low Temperature Frost Prevention: Installed inside remote distribution panels, outdoor junction boxes, and solar power array enclosures to keep ambient temperatures from dropping below freezing.
Traffic and Telecommunication Hubs: Placed within roadside control cabinets, telecommunication enclosures, and optical fiber distribution boxes to protect equipment from variable outdoor weather conditions.
Wind Turbine and Marine Controls: Deployed inside coastal or sub zero high altitude turbine bays where damp air and extreme cold can compromise power relays and electronic safety loops.