GBR-612 Series Thick Film Heating Elements
Thick film resistive heating element on 96% alumina (Al₂O₃) ceramic substrate
Rated continuous power 5W to 100W when mounted on a heatsink
Extremely low inductance less than 3µH — suitable for high-frequency and fast-switching circuit environments
Wide supply voltage range 12V to 240V, covering DC low-voltage and full mains-voltage AC
Standard catalogue configurations: 40W at 12V, 24V, and 48V DC; 20W, 40W, and 60W at 230V AC; other voltage and power combinations available on request
Power tolerance ±5%
Temperature coefficient of resistance (TCR) ±50 ppm/°C
Maximum element temperature 250°C
Solder field termination for direct electrical connection
What are the GBR-612 Series Thick Film Heating Elements?
The GBR-612 series are thick film heating elements fabricated on a 96% alumina (Al₂O₃) ceramic substrate, engineered to deliver high power density within a compact footprint while maintaining an extremely low inductance of less than 3µH. The resistive layer is deposited directly onto the ceramic surface using a thick film process, producing a flat, low-profile element that mounts efficiently against a heatsink and supports continuous rated outputs from 5W to 100W. The GBR-612 shares its core thick film on alumina construction and sub-3µH inductance specification with the GBR-605 series, but is distinguished by a higher upper power ceiling of 100W and a broader catalogue of standard voltage and power configurations spanning both DC and AC supply levels.
A standout feature of the GBR-612 series is its coverage of both low-voltage DC and mains-voltage AC systems within a single product family. Standard catalogue configurations provide a 40W rating at each of the three most common DC bus voltages — 12V, 24V, and 48V — alongside 20W, 40W, and 60W ratings at 230V AC. This breadth of standard configurations allows the GBR-612 to be specified directly into automotive, industrial automation, telecommunications, and mains-connected heating applications without requiring custom resistance values, while designs demanding other voltage or power combinations remain available on request. The resistance value for each variant is selected to deliver its rated dissipation at the nominal supply, and all variants carry a power tolerance of ±5%.
The inductance of less than 3µH results from the planar geometry and non-inductive nature of the thick film element, making the GBR-612 equally suitable for use as a high-power resistor in high-frequency switching circuits, power electronics damping networks, and RF applications where parasitic inductance must be minimised. The temperature coefficient of resistance of ±50 ppm/°C ensures stable and predictable resistance across the operating temperature range, and the maximum permissible element temperature of 250°C defines the thermal ceiling for both continuous and overload conditions. Electrical connection is made through solder fields on the element surface, providing a compact and reliable termination method for wire attachment or PCB-based integration.
GBR-612 Series Thick Film Heating Elements Specifications
A practical overview for engineers and procurement teams evaluating resistive solutions.
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
Applications of the GBR-612 Series Thick Film Heating Elements
Where RARA resistive heaters are deployed in the field.
Industrial automation and control panels — low-inductance heating and load dissipation on 24V and 48V DC supply rails in PLCs, drives, and switchgear
High-frequency power electronics — non-inductive damping and snubber resistors in switching converters and inverters where inductance below 3µH is essential
Automotive and EV systems — multi-voltage DC compatibility for battery thermal management, on-board chargers, and DC–DC converter load elements
Telecommunications infrastructure — compact 48V DC heating elements for temperature-stabilised outdoor cabinets and equipment enclosures
Precision surface heating systems — stable uniform heat delivery for laboratory instruments, analytical devices, and controlled thermal platforms
Semiconductor and PCB processing equipment — localised precision heating of substrates and components during fabrication, bonding, and curing
RF and microwave circuits — low-inductance power resistors for signal termination, impedance matching, and attenuator networks at elevated frequencies
Medical and diagnostic instrumentation — stable low-TCR heating for temperature-sensitive analytical and clinical measurement equipment
Renewable energy and energy storage systems — flexible voltage compatibility for heating integration in solar, wind, and battery storage installations
Fluid and gas heating assemblies — compact heatsink-mounted elements for flow-through heating, gas pre-conditioning, and sample temperature control
Related Products of the GBR-612 Series Thick Film Heating Elements
Model: GBR-618
Resistor type: Heater
Description: Thick film elements
Power Rating: 5W~20W
Supply Voltage (V): 3-24
Tolerance (%): ±1
TCR (ppm/C): 100
Model: GBR-619
Resistor type: Heater
Description: Thick film elements
Power Rating: 10W~100W
Supply Voltage (V): 12-230
Tolerance (%): ±10
TCR (ppm/C): 100
Model: GBR-620
Resistor type: Heater
Description: Thick film elements
Power Rating: 1W~2W
Supply Voltage (V): 12-240
Tolerance (%): ±5
TCR (ppm/C): 50
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
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.
