RSHT/RSH Series Space Heaters
AC mains-powered resistive space heaters for use inside electrical enclosures and control cabinets
Rated power range 50W to 500W (RSHT series: 50W to 200W; RSH series: 50W to 500W)
Operating voltage range AC 110V to AC 240V, 50Hz to 60Hz
Resistance range approximately 24Ω to 1267Ω depending on model and voltage rating
Tolerance ±10%
CE certification available; all models are RoHS compliant
Compact tubular aluminium housing with M4 or M5 burring tab mounting
Available as RSHT (with terminal block) or RSH (with lead wires) variants
What are the RSHT/RSH Series Space Heaters?
The RSHT and RSH series are AC-powered resistive space heaters designed to prevent condensation and maintain minimum ambient temperatures inside electrical enclosures, switchgear cabinets, control panels, and similar enclosed equipment. The heaters operate directly from mains voltages in the range of AC 110V to AC 240V at frequencies of 50Hz or 60Hz, making them suitable for deployment across a wide range of international power infrastructure without additional voltage conversion.
The resistive element is housed in a compact aluminium tube that provides both structural support and a degree of convective heat distribution. Mounting is achieved via a burring tab arrangement, with M4 fixings on the RSHT50 through RSHT200 and RSH50 through RSH200 models, and M5 fixings on the larger RSH300 through RSH500 models. The two series differ in their termination method: the RSHT variants are fitted with a terminal block for in-cabinet wiring, while the RSH variants are supplied with pre-attached lead wires for direct connection. Both variants share the same resistive element and thermal performance for equivalent power ratings.
Power ratings span 50W to 200W for the RSHT series and 50W to 500W for the RSH series. Within each rating, the resistance value is selected to produce the rated dissipation at the nominal supply voltage, with tolerance of ±10% accommodating supply variation and component spread. The CE-certified variants carry a unified 220V to 240V voltage marking and are verified to comply with applicable European directives; non-CE variants are marked for the specific nominal voltage for which they are rated. All models are manufactured in compliance with RoHS requirements, restricting the use of hazardous substances in line with current environmental legislation.
RSHT/RSH Series Space Heaters Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: RSHT, RSH
Resistor type: Heater
Description: Metal clad space heater
Power Rating: 50W~500W
Supply Voltage (V): 110-240
Tolerance (%): ±10
TCR (ppm/C): 260
Applications of the RSHT/RSH Series Space Heaters
Where RARA resistive heaters are deployed in the field.
Electrical switchgear and distribution panels — condensation prevention on busbars, contactors, and insulation surfaces
Industrial control cabinets and PLCs — maintaining minimum internal temperature in cold environments
Outdoor and unheated enclosures — preventing moisture ingress effects on sensitive electronic assemblies
Motor control centres and variable-speed drives — temperature maintenance during standby and shutdown periods
Telecommunications and data infrastructure cabinets — anti-condensation heating in exposed or unheated plant rooms
Renewable energy inverter and battery storage enclosures — cold-weather protection for power electronics
Railway and transportation electrical cubicles — reliable anti-condensation heating under vibration and wide temperature variation
Marine and offshore electrical panels — humidity and salt-air protection in corrosive environments
Related Products of the RSHT/RSH Series Space Heaters
Model: GBR-601
Resistor type: Heater
Description: Thick film elements
Power Rating: 10W~150W (heatsink)
Supply Voltage (V): 12-240
Tolerance (%): ±5
TCR (ppm/C): 50
Model: GBR-603
Resistor type: Heater
Description: Thick film elements
Power Rating: 5W~30W
Supply Voltage (V): 12-48
Tolerance (%): ±5
TCR (ppm/C): 1500
Model: GBR-605
Resistor type: Heater
Description: Thick film elements
Power Rating: 5W~60W (heatsink)
Supply Voltage (V): 12-240
Tolerance (%): ±5
TCR (ppm/C): 50
Model: GBR-612
Resistor type: Heater
Description: Thick film elements
Power Rating: 5W~100W
Supply Voltage (V): 12-240
Tolerance (%): ±5
TCR (ppm/C): 50
Why Choose RARA Resistive Heaters
What sets RARA apart for engineers and procurement managers in industrial and automotive markets.
01
Three Technologies
Metal clad space heaters, PTC self-regulating elements, and thick film heaters — RARA covers every industrial heating requirement from a single ISO-certified supplier.
02
Wide Voltage Range
From 3V DC low-voltage PCB warmers to 240V AC panel space heaters — the GBR series and RSHT/RSH range cover virtually any supply voltage in industrial or building systems.
03
PTC Self-Regulation
PTC models (YB, GBR-603) are inherently self-limiting — no thermostat or controller required. As temperature rises, power draw automatically decreases, preventing overheating by design.
04
Global Track Record
Deployed by Siemens, Schneider Electric, Rockwell, and Hanwha in industrial panels and power systems across six continents — backed by ISO 9001 and IATF 16949 certification.
