RF Capacitors

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Our range of RF capacitors offers capacitance values from 0.1pF to 0.1µF, and voltage ratings from 2V to 2.5kV.

What is an RF Capacitor?

An RF capacitor is a capacitor with material and design characteristics optimised for RF frequencies. The key characteristics are:
  1. Lowest possible Equivalent Series Resistance (ESR) at RF frequencies
  2. High Q at RF frequencies
  3. Minimal capacitance change with temperature
  4. High series resonant frequency (SRF)

What is an RF Capacitor used for?

RF capacitors are used for various functions such as DC blocking, bypass, filtering, and impedance matching. Common applications include the following:
  1. RF power amplifiers (PA)
  2. Cellular base stations (4G, 5G)
  3. Wireless LAN
  4. Telecommunication Networks
  5. GPS
  6. Keyless entry systems
  7. Bluetooth
  8. Automotive V2X, Safety Systems, Power Train, Communication Systems

What capacitors are best for RF?

Single layer capacitors (SLCs) are specifically designed for use in microwave and RF applications. This is because the inherent self-resonant frequency (SRF), which is the point where the capacitor will exhibit the least amount of impedance, of an SLC is the highest of any discrete lumped constant capacitor. Capacitors with a high SRF have low equivalent series resistance (ESR), which is the internal resistance in the capacitor that appears in series with the capacitance of the device.

This is important because, in general, ESR increases as frequency increases, so using a capacitor that has inherently low ESR is necessary. Additionally, since SLCs are formed monolithically, the number of mechanical parts in the SLC is limited, which also contributes to a lower ESR value.

One potential drawback of SLCs is that since they comprise just a single layer of material, capacitance is heavily dependent on the dielectric constant of the dielectric used, which limits the capacitance that can be achieved. Therefore, SLCs are mainly ideal for high-frequency, low-capacitance applications.
 
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500R07S2R7BV4T
500R07S2R7BV4T - Capacitor, RF, High-Q, 2.7 pF, 50 V, S-Series, ± 0.1pF, 125 °C, 0402 [1005 Metric]

41M1574

Capacitor, RF, High-Q, 2.7 pF, 50 V, S-Series, ± 0.1pF, 125 °C, 0402 [1005 Metric]

JOHANSON TECHNOLOGY

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2.7pF 50V - - S-Series ± 0.1pF - 125°C - 0402 [1005 Metric] - - - - -
CBR02C239B5GAC
CBR02C239B5GAC - CAP, 2.3PF, 50V, 0201

43AC8709

CAP, 2.3PF, 50V, 0201

KEMET

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0 0 - - HiQ-CBR Series ± 0.1pF - 125°C - 0201 [0603 Metric] - - - - -
CBR02C289B5GAC
CBR02C289B5GAC - CAP, 2.8PF, 50V, 0201

43AC8714

CAP, 2.8PF, 50V, 0201

KEMET

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0 0 - - HiQ-CBR Series ± 0.1pF - 125°C - 0201 [0603 Metric] - - - - -
CBR02C179B5GAC
CBR02C179B5GAC - CAP, 1.7PF, 50V, 0201

43AC8700

CAP, 1.7PF, 50V, 0201

KEMET

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0 0 - - HiQ-CBR Series ± 0.1pF - 125°C - 0201 [0603 Metric] - - - - -
CBR02C299B5GAC
CBR02C299B5GAC - CAP, 2.9PF, 50V, 0201

43AC8715

CAP, 2.9PF, 50V, 0201

KEMET

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0 0 - - 0 0 - 125°C - 0 - - - - 0
CBR02C379B5GAC
CBR02C379B5GAC - CAP, 3.7PF, 50V, 0201

43AC8724

CAP, 3.7PF, 50V, 0201

KEMET

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0 0 - - HiQ-CBR Series ± 0.1pF - 125°C - 0201 [0603 Metric] - - - - -
CBR02C329B5GAC
CBR02C329B5GAC - CAP, 3.2PF, 50V, 0201

43AC8719

CAP, 3.2PF, 50V, 0201

KEMET

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0 0 - - HiQ-CBR Series ± 0.1pF - 125°C - 0201 [0603 Metric] - - - - -
CBR02C199B5GAC
CBR02C199B5GAC - CAP, 1.9PF, 50V, 0201

43AC8703

CAP, 1.9PF, 50V, 0201

KEMET

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0 0 - - HiQ-CBR Series ± 0.1pF - 125°C - 0201 [0603 Metric] - - - - -
CBR06C229B5GAC
CBR06C229B5GAC - CAP, 2.2PF, 50V, 0603 ROHS COMPLIANT: YES

67AH8922

CAP, 2.2PF, 50V, 0603 ROHS COMPLIANT: YES

KEMET

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2.2pF - - - HiQ-CBR Series ± 0.1pF - 125°C - 0603 [1608 Metric] - - - - -
04025U160FAT2A
04025U160FAT2A - Capacitor, RF, 16 pF, 50 V, U Series, ± 1%, 125 °C, 0402 [1005 Metric]

08AK4818

Capacitor, RF, 16 pF, 50 V, U Series, ± 1%, 125 °C, 0402 [1005 Metric]

KYOCERA AVX

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16pF - - - U Series ± 1% - 125°C - 0402 [1005 Metric] - - - - -
MC12FD101J-F
MC12FD101J-F - Capacitor, RF, High Frequency, 100 pF, 500 V, Type MC Series, ± 5%, 125 °C, 1210 [3225 Metric]

66K3042

Capacitor, RF, High Frequency, 100 pF, 500 V, Type MC Series, ± 5%, 125 °C, 1210 [3225 Metric]

CORNELL DUBILIER

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100pF - - - Type MC Series ± 5% - 125°C - 1210 [3225 Metric] - - - - -
251R15S5R6CV4E
251R15S5R6CV4E - CAP, 5.6PF, 250V, C0G/NP0, 0805

41T1811

CAP, 5.6PF, 250V, C0G/NP0, 0805

JOHANSON TECHNOLOGY

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0 0 - - S ± 0.25pF - 125°C - 0805 [2012 Metric] - - - - 0
MC12FA201J-F
MC12FA201J-F - Capacitor, RF, High-Frequency, 200 pF, 100 V, MC Series, ± 5%, 125 °C, 1210 [3225 Metric]

66K2929

Capacitor, RF, High-Frequency, 200 pF, 100 V, MC Series, ± 5%, 125 °C, 1210 [3225 Metric]

CORNELL DUBILIER

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200pF - - - MC Series ± 5% - 125°C - 1210 [3225 Metric] - - - - AEC-Q200
06032U6R8CAT2A
06032U6R8CAT2A - CAP, 6.8PF, 200V, C0G/NP0, 0603

39K0159

CAP, 6.8PF, 200V, C0G/NP0, 0603

KYOCERA AVX

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0 0 - - Accu-P ± 0.25pF - 125°C - 0603 [1608 Metric] - - - - 0
251R14S101JV4T
251R14S101JV4T - CAP, 100PF, 250V, 5%, C0G, 0603, SMD

41T1749

CAP, 100PF, 250V, 5%, C0G, 0603, SMD

JOHANSON TECHNOLOGY

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04025U3R3BAT2A
04025U3R3BAT2A - Capacitor, RF, 3.3 pF, 50 V, U Series, ± 0.1pF, 125 °C, 0402 [1005 Metric]

60R6161

Capacitor, RF, 3.3 pF, 50 V, U Series, ± 0.1pF, 125 °C, 0402 [1005 Metric]

KYOCERA AVX

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3.3pF - - - U Series ± 0.1pF - 125°C - 0402 [1005 Metric] - - - - -
CBR06C399BAGAC
CBR06C399BAGAC - CAP, 3.9PF, 250V, 0603

43AC8961

CAP, 3.9PF, 250V, 0603

KEMET

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0 0 - - HiQ-CBR Series ± 0.1pF - 125°C - 0603 [1608 Metric] - - - - -
CBR06C829B5GAC
CBR06C829B5GAC - CAP, 8.2PF, 50V, 0603 ROHS COMPLIANT: YES

67AH8933

CAP, 8.2PF, 50V, 0603 ROHS COMPLIANT: YES

KEMET

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8.2pF - - - HiQ-CBR Series ± 0.1pF - 125°C - 0603 [1608 Metric] - - - - -
CBR04C160F5GAC
CBR04C160F5GAC - CAP, 16PF, 50V, 0402 ROHS COMPLIANT: YES

67AH8898

CAP, 16PF, 50V, 0402 ROHS COMPLIANT: YES

KEMET

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16pF - - - HiQ-CBR Series ± 1% - 125°C - 0402 [1005 Metric] - - - - -
CBR04C108B5GAC
CBR04C108B5GAC - CAP, 0.1PF, 50V, 0402 ROHS COMPLIANT: YES

67AH8889

CAP, 0.1PF, 50V, 0402 ROHS COMPLIANT: YES

KEMET

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0.1pF - - - HiQ-CBR Series ± 0.1pF - 125°C - 0402 [1005 Metric] - - - - -
CBR04C109B1GAC
CBR04C109B1GAC - CAP, 1PF, 100V, 0402 ROHS COMPLIANT: YES

67AH8890

CAP, 1PF, 100V, 0402 ROHS COMPLIANT: YES

KEMET

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1pF - - - HiQ-CBR Series ± 0.1pF - 125°C - 0402 [1005 Metric] - - - - -
CBR06C470JAGAC
CBR06C470JAGAC - CAP, 47PF, 250V, 0603 ROHS COMPLIANT: YES

67AH8925

CAP, 47PF, 250V, 0603 ROHS COMPLIANT: YES

KEMET

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47pF 250V - - HiQ-CBR Series ± 5% - 125°C - 0603 [1608 Metric] - - - - -
MC18FD101J-F
MC18FD101J-F - Capacitor, RF, High-Frequency, 100 pF, 500 V, MC Series, ± 5%, 125 °C, 1812 [4532 Metric]

66K3258

Capacitor, RF, High-Frequency, 100 pF, 500 V, MC Series, ± 5%, 125 °C, 1812 [4532 Metric]

CORNELL DUBILIER

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100pF - - - MC Series ± 5% - 125°C - 1812 [4532 Metric] - - - - AEC-Q200
251R15S221JV4E
251R15S221JV4E - CAP, 220PF, 250V, 5%, C0G, 0805, SMD

41T1801

CAP, 220PF, 250V, 5%, C0G, 0805, SMD

JOHANSON TECHNOLOGY

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04025U4R7BAT2A
04025U4R7BAT2A - Capacitor, RF, Low ESR, 4.7 pF, 50 V, U Series, ± 0.1pF, 125 °C, 0402 [1005 Metric]

88M8104

Capacitor, RF, Low ESR, 4.7 pF, 50 V, U Series, ± 0.1pF, 125 °C, 0402 [1005 Metric]

KYOCERA AVX

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4.7 50 - - U Series ± 0.1pF - 125 - 0402 [1005 Metric] - - - - -