Heating elements & braking resistors
AUREL Microelectronic Division has developed a line of Thick Film Resistors on stainless steel substrates used for heating applications as well, with different design features, suitable for braking, snubbing and discharge requirement applications.
Heating Elements and Braking resistors based on thick film technology, are realized printing on Stainless Ferritic and Austenitic substrates an electrically insulating, but thermally conductive, ceramic dielectric layer.
On this are subsequently printed conductive and resistive layers to obtain the desired resistor and capability issue.
HEATING ELEMENTS
Applications: coffee machines, kettles, boilers.
- Low thermal mass: quicker heating, energy saving
- Capability to generate flat elements: direct heat to food or water, thinner construction
- Capability to select and control resistance &TCR: better performance and control
- Potential to integrate additional functionality: more compact design
- Rapid design and flexibility: low investment and start-up cost
BRAKING RESISTORS
Applications: charge & discharge circuits for hybrid electric vehicle, motion control system for elevators.
- Improved thermal transfer for high power density applications
- Reduced size and compact design
- Higher reliability against shocks and vibration
- A cost effective solution for power application
THICK FILM ON STEEL
Heating elements and power resistors are realized printing on Stainless Ferritic or Austenitic Steel Substrates, an electrically insulating, but thermally conductive, ceramic dielectric layer.
On this are subsequently printed conductive and resistive layers to obtain the desired resistor and power capability values.
- Base material: AISI Serie 300 – AISI Serie 400
- Power density: up to 100W / cm2
- Dielectric strenght: > 1250 Vac @ dielectric >75 µm
- Max surface temperature: 400 °C
- TCR: 300 – 3.000 ppm/°C
Applications: due to the mechanical and thermal properties of the steel, these heaters are particularly suited for: kettles, boilers, coffee machines, analisys instrumentations, plastic moulding, braking resistors.
THICK FILM ON CERAMIC
Using standard thick-film technology and materials it is possible to obtain high power and non-inductive resistors realized on a high dielectric strenght substrate.
- Base material: Al2O3/AlN
- Power density: up to 100W / cm2
- Dielectric strenght: > 15 Kv/mm
- Max surface temperature: 450 °C
- TCR: < 150 ppm/°C
Applications: due to the high dielectric strenght and chemical resistance these resistors are particularly suited for: chemical analysys, high voltage and power applications, rf non-inductive dummy loads.