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High-performance sapphire variable capacitors



More informations

hese sapphire gigatrimmers have been selected from different types for their excellent features. Our aim is to propose 3 types with very good performances, which are better than other gigatrimmers and really offer top quality for RF and microwave applications.

Sapphire is the best material for: Insulation, heat dissipation and Q in microwave applications. It is completely chemically inert and has a very low moisture absorption value, which is even better than that of aluminium oxide.

Even though it is very small, it is often used for high power applications.

Comparison chart among the best microwave materials
  Sapphire Alumina AL2O2 Quartz SiO2 Pure Teflon
Dielectric constant εr about 11 about 10 about 3.8 about 2,05
dissipation factor tanδ @ 10GHz < 0,0001 0,0002 0.0015 0.0003
Thermal stability good good good poor
Mechanical performance good good good poor
Thermal dissipation very good good average poor

Main applications:

Very high Q, about 2-3 times higher than other gigatrimmers, they are suitable for low noise VCO and oscillators up to X-band (12 GHz for model CVG-Z5 27263).
Considerable applicable power ex. 50 W / 2 GHz tanks for sapphire isolation and 500 V work (1000 V test and 1500 V break), very good for medium power matching, they are often used on the last TX stage in 1.9 GHz mobile base station with 50 W
NP0 very high thermal stability, they are suitable for trimming in oscillators, OCXO thermostats working at high temperatures (+70°C/+90°C).
They are easy to mount, this type of enclosure is perfect for PCB mounting, for easy tuning the rotor touching the screwdriver is soldered directly to the ground
Very small size and very fine tuning resolution with multiturn control.
It is suitable for military specifications MIL STD 202E and C-14409.

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Temex AT27263 Sapphire variable capacitor, 0.3 - 1.2 pF, 500V
Sapphire variable capacitor, 0.3 - 1.2 pF, 500V
Order code: CVG-Z5
Sapphire variable capacitor, 0.3 - 1.2 pF, 500V

Temex AT27263
Conditions: N- (The product is brand new but it comes from an old production)
Min. capacitance : 0.3 pF
Max. capacitance : 1.2 pF
Rated voltage: 500 V
Q @ Freq.: > 5000 @ 250 MHz
Orientation : vertical
Mounting: SMD
Go to product page
CVG-Z5
Order code: CVG-Z5
Temex AT27263 
Stock: 2947 pcs
Price each
$7.73
Volume discounts
 10+
$7.38
 50+
$7.08
 100+
$6.65
 250+
$6.21
 500+
$5.78
(VAT tax not included)
Minimum: 1
Multiple: 1
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Temex AT27263
Bestseller
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Sapphire variable capacitor, 0.3 - 1.2 pF, 500V
Order code: CVG-Z5
Temex AT27263
  • N-
  • 0.3 pF
  • 1.2 pF
  • 500 V
  • > 5000 @ 250 MHz
  • vertical
  • SMD
Stock: 2947 pcs
Minimum: 1 pc
Multiple: 1 pc
 1+
$7.73
 10+
$7.38
 50+
$7.08
 100+
$6.65
 250+
$6.21
 500+
$5.78
(VAT tax not included)
 

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Sapphire variable capacitor, 0.3 - 1.2 pF, 500V
Temex AT27263
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