GBR-666 Series Thick Film Heating Elements
Thick film resistive heating element on 96% alumina (Al₂O₃) ceramic substrate
Rated continuous power 10W to 100W when mounted on a heatsink
Pulse power capability 200W for 2 seconds on heatsink
Wide supply voltage range 12V to 240V, covering DC low-voltage through to full mains-voltage AC
Standard catalogue configurations at 12V DC (20W, 40W, 60W) and 24V DC (20W, 40W, 60W); other voltage and power combinations available on request
Power tolerance ±5%
Temperature coefficient of resistance (TCR) +50 ppm/°C
Maximum element temperature 300°C
Contact and solder field termination for direct electrical connection
Suitable as a heating element in various heater types and as a high-power resistor
What are the GBR-666 Series Thick Film Heating Elements?
The GBR-666 series are thick film heating elements fabricated on a 96% alumina (Al₂O₃) ceramic substrate, designed to deliver high power density in a compact footprint across a broad range of supply voltages. Rated at 10W to 100W continuous on a heatsink, with a 2-second pulse capability of 200W, the GBR-666 occupies a similar power tier to the GBR-619 but is distinguished by two notable characteristics: a unidirectional positive TCR of +50 ppm/°C rather than the bidirectional ± specification common across most of the GBR range, and a supply voltage ceiling of 240V, which is the highest nominal voltage rating in the standard GBR thick film heater catalogue. These attributes make the GBR-666 particularly well suited to applications powered directly from international mains supplies where the supply voltage may reach the upper end of the AC 230V tolerance band.
Standard catalogue configurations cover two DC bus voltages — 12V and 24V — at three power levels each: 20W, 40W, and 60W. The voltage range supported extends to 240V, meaning the element can also be specified for mains-voltage AC applications and higher-voltage DC systems by way of custom configurations available on request. The resistance value for each variant is selected to deliver its rated output at the nominal supply voltage, and all variants carry a power tolerance of ±5%. The maximum permissible element temperature is 300°C, consistent with other high-power members of the GBR family. The 200W pulse rating for 2-second durations provides useful transient power headroom for applications involving inrush loads, rapid warm-up cycles, or intermittent high-demand thermal tasks alongside lower steady-state operation.
Electrical connection is via contact and solder fields on the element surface, offering flexibility for both spring-contact and soldered wire or PCB attachment configurations. In addition to their primary role as heating elements in custom heater and precision surface-heating assemblies, the GBR-666 series elements can function as high-power resistors in circuits requiring a heatsinkable, ceramic-substrate dissipation element with a known and stable resistance value. The thick film construction and planar geometry inherently limit parasitic inductance, making the series appropriate for use in power electronics environments where inductive reactance in a load element would be undesirable.
GBR-666 Series Thick Film Heating Elements Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
Model: GBR-666
Resistor type: Heater
Description: Thick film elements
Power Rating: 10W~100W
Supply Voltage (V): 12-240
Tolerance (%): ±5
TCR (ppm/C): 50
Applications of the GBR-666 Series Thick Film Heating Elements
Where RARA resistive heaters are deployed in the field.
Mains-voltage heating assemblies — rated to 240V for direct integration into AC mains-powered heater designs covering the full international supply voltage tolerance range
Industrial control panels and switchgear — compact heatsink-mounted heating and power dissipation on 12V and 24V DC supply rails in automation and drive equipment
Precision surface heating systems — stable, uniform heat delivery for laboratory instruments, analytical equipment, and thermally controlled process surfaces
Rapid warm-up and thermal cycling equipment — 200W pulse capability for fast temperature ramp applications and cyclic heating duties
Automotive and EV power electronics — 12V and 24V DC compatible elements for battery module thermal management, fluid warmers, and on-board power conversion assemblies
High-power resistor applications — compact ceramic heatsink-mounted dissipation elements in power electronics test systems, load banks, and converter snubber circuits
Semiconductor and PCB processing equipment — localised precision heating of substrates and components during fabrication, bonding, and curing at defined power levels
Renewable energy and energy storage systems — wide voltage range compatibility for heating and load dissipation in solar, wind, and battery storage power conversion equipment
Medical and diagnostic instrumentation — compact low-TCR heating for temperature-sensitive analytical and clinical measurement devices requiring stable heat input
Fluid and gas heating assemblies — heatsink-coupled elements for flow-through heating, gas pre-conditioning, and reagent temperature control across DC and AC supplies
Related Products of the GBR-666 Series Thick Film Heating Elements
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.
