Advanced High Temperature Capacitors
Next Generation High Temperature Capacitors
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TRS high temperature capacitors are based on a unique relaxor ferroelectric
with high volumetric efficiency. The temperature characteristics of the
dielectric can be engineered to suit the specific requirements of an application,
with operating temperatures ranging from 150°C to over 450°C.
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Typical Commercial Uses
- Deep-well oil exploration
- Automotive electronics
- Motor controllers
- Power inverters
- Pulsed power
- Power electronics
- Scientific instrumentation, etc.
Performance Characteristics
Several dielectric formulations have been developed to provide high dielectric
constant (K) performance centered around operating temperatures of 300°C
(HT-300, left) and 450°C (HT-460, right). These materials have been developed
for characteristics similar to Y5V except that the operating temperature is
shifted from 10-40°C to 150-350°C or 300-500°C.
The HT dielectrics have outstanding high-temperature dielectric properties.
Near the operating temperature, HT-300 capacitors are designed with a 4x voltage
safety margin, have RC constants of 11Ω-F, ~30% change in capacitance
at the rated voltage, and limited frequency dependence. Cap. values up to ~2μF
are available.
High Temperature Capacitor Specifications
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Dielectric
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HT-300
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HT-460
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WT-1
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| Operating Temperature (°C) |
300 (±50)
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460 (±50)
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-55-200*
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| Rated Voltage, max. (V) |
500
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185
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500**
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Breakdown Voltage (V)
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2230
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370
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-
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| Nominal Capacitance @ 1 kHz
(μF) |
0.1-2.0
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0.1-2.0
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0.1-1.0
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Nominal Dielectric Loss @ 1
kHz (%)
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~1
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4-5
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~1
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| C/C0V @ Rated Voltage
and Temp. |
0.73
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0.70
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-
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| IR @ 100nF, rated volt. and
temp. (Ω-F) |
10.7
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-
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-
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*Estimated: ΔC(-55/+200°C)
~ -20% / +66%
**Reverse voltage limited to approx. -125V |
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Wide Temperature Dependence Capacitors
Typical temperature dependence of TRS' wide temperature dependence capacitors:
- WT-1 dielectric is ~X7R with a capacitance change of -15% at -55°C and
+66% at 200°C operation can be extended to 300°C with capacitance
variation +161%.
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