High-Q Porcelain P90 Capacitors
Ultra-Stable, Low ESR Porcelain, RF Capacitors for Low-Frequency Power Applications (<100 MHz)
Johanson Technology’s new P90 High-Q Capacitors are designed for low-frequency, high-reliability RF and power applications. These non-magnetic surface mount MLCCs deliver low-loss performance with excellent Q factor stability below 100MHz—ideal for demanding designs in industrial, aerospace, and medical electronics.
Manufactured in North America.
Features:
- Non-Magnetic Construction
- High Fire Porcelain Dielectric Body
- Highly Reliable, Low Loss Performance
- EIA Case Sizes: 0505, 1111, 2525, 3838 and 7676
- Low Frequency Power Handling Performance: <100MHZ
- Tape & Reel for Surface Mount Assembly 7” Reels Standard
- External Termination Layer on Chip: 100% Sn Standard (RoHS) and SnPb Optional
- Enhanced High-Q / Low Loss P90 – Lower Loss Than Standard NP0
- P90 Temperature Coefficient: -55°C to +150°C (-65°F to +302°F)
- Controlled Series Resonant Frequencies and Parallel Resonant Frequencies (SRF/PRF)
Common Applications:
- RF Matching and Filter Networks
- High Inductance Environments
- Decoupling, Bypass, and DC Block
- Cellular Base Station Equipment
- RF and Microwave Test Equipment
- MRI Coil Matching
- Broadband Wireless Equipment
- High Voltage RF Requirements
- High Power Radio and Radar
- Plasma Generator Equipment
- High Voltage RF Resonant Circuits
Advantages of a Low Loss Capacitor:
- Increased power output and higher efficiency from RF power amplifiers
- Reduced amount of heat generated through ultra-low ESR / High-Q
- Signal to noise ratio and overall noise temperature can be improved by lower losses
- Lower in-band insertion loss (S21) when used in filter networks
- Lower resistivity through the heat generation plane to transfer heat allowing higher power dissipation
Samples and Design Support
Contact Johanson Applications Engineers at: Ask a question.
| Size Code | Units | Length "L" | Width "W" | Thickness "T" | End Band "EB" | Mechanical Characteristics |
|---|---|---|---|---|---|---|
| 1111 DB | in mm |
0.110±0.020/-0.010 2.79 ± 0.51/-0.25 |
0.110±0.010 2.79±0.25 |
0.100 max. 2.54 max. |
0.024 max 0.61 max |
 |
| 2525 EV | in mm |
0.225±0.025/-0.010 5.72 ± 0.64/-0.25 |
0.250±0.015 6.35±0.38 |
0.150 max. 3.81 max. |
0.020 to 0.047 0.51 to 1.19 |
|
| 3838 FM | in mm |
0.380±0.015/-0.010 9.65 ± 0.38/-0.25 |
0.380±0.010 9.65±0.25 |
0.170 max. 4.32 max. |
0.024 to 0.059 0.61 to 1.50 |
|
| 7676 KG | in mm |
0.760 ± 0.015/-0.010 19.3 ± 0.28 to 0.25 |
0.760±0.010 19.3 ± 0.25 |
0.197 max 5.00 max |
0.024 to 0.059 0.60 ± 1.50 |
| Characteristics | Test Parameters |
|---|---|
| Dielectric Strength | Ultra-Low Loss, High-Q NPO |
| Rated Voltage (VDC) | 200 to 8000 Volts DC (See List Below) |
| Capacitance Range (EIA) | 0.2 to 20000 pF (See List Below) |
| Capacitance Tolerance | A, B, C, D, F, G, J, K |
| Test Parameters | 1 MHz ± 50 kHz @ 1.0 ± 0.2 VRMS, 25°C for <1000pF 1 kHz ± 50 kHz @ 1.0 ± 0.2 VRMS, 25°C for >1000pF |
| Temperature Coefficient | P90 -55° to 125°C +90ppm +/- 20ppm P90 125° to 200°C +90ppm +/- 30ppm |
| Dissipation Factor | 0.1% maximum |
| Quality Factor | Q > 1,000 @ 1 MHz 50 kHz, 25°C, 1.0 VRMS for cap < 1000pF Q > 1,000 @ 1 kHz 50 Hz, 25°C, 1.0 VRMS for cap > 1000pF Typically, greater than 10,000 |
| Insulation Resistance | > 100 GΩ minimum at 25°C, Test Voltage 500V >10 GΩ @ 125°C, Test Voltage 500V |
| Operating Environment Range | -55° to +200°C |
| Storage Post Assembly Non-Operating | -65° to 200°C |
| Storage Environment in packaging | Tape & Reeled: 5 to 40 C & 20% to 70% RH |
| Breakdown Voltage (DWV) | 250% of Rated Voltage for 5 sec for rated voltage <500V 150% of Rated Voltage for 5 sec for 500V < rated voltage <1250V 120% of Rated Voltage for 5 sec for rated voltage > 1250V |
| Cap Values (pF) | Code | Voltage |
|---|---|---|
| 0.2 | 0R1 | 1500V |
| 0.3 | 0R2 | 1500V |
| 0.4 | 0R3 | 1500V |
| 0.5 | 0R4 | 1500V |
| 0.6 | 0R5 | 1500V |
| 0.7 | 0R6 | 1500V |
| 0.8 | 0R7 | 1500V |
| 0.9 | 0R8 | 1500V |
| 1 | 0R9 | 1500V |
| 1.1 | 1R0 | 1500V |
| 1.2 | 1R1 | 1500V |
| 1.3 | 1R2 | 1500V |
| 1.4 | 1R3 | 1500V |
| 1.5 | 1R4 | 1500V |
| 1.6 | 1R5 | 1500V |
| 1.7 | 1R6 | 1500V |
| 1.8 | 1R7 | 1500V |
| 1.9 | 1R8 | 1500V |
| 2 | 1R9 | 1500V |
| 2.1 | 2R0 | 1500V |
| 2.2 | 2R1 | 1500V |
| 2.4 | 2R2 | 1500V |
| 2.7 | 2R4 | 1500V |
| 3 | 2R7 | 1500V |
| 3.3 | 3R0 | 1500V |
| 3.6 | 3R3 | 1500V |
| 3.9 | 3R6 | 1500V |
| 4.3 | 3R9 | 1500V |
| 4.7 | 4R3 | 1500V |
| 5.1 | 4R7 | 1500V |
| 5.6 | 5R1 | 1500V |
| 6.2 | 5R6 | 1500V |
| 6.8 | 6R2 | 1500V |
| 7.5 | 6R8 | 1500V |
| 8.2 | 7R5 | 1500V |
| 9.1 | 8R2 | 1500V |
| 10 | 9R1 | 1500V |
| 11 | 100 | 1500V |
| 12 | 110 | 1500V |
| 13 | 120 | 1500V |
| 14 | 130 | 1500V |
| 15 | 150 | 1500V |
| 16 | 160 | 1500V |
| 18 | 180 | 1500V |
| 20 | 200 | 1500V |
| 22 | 220 | 1500V |
| 24 | 240 | 1500V |
| 27 | 270 | 1500V |
| 30 | 300 | 1500V |
| 33 | 330 | 1500V |
| 36 | 360 | 1500V |
| 39 | 390 | 1500V |
| 43 | 430 | 1500V |
| 47 | 470 | 1500V |
| 51 | 510 | 1500V |
| 56 | 560 | 1500V |
| 62 | 620 | 1500V |
| 68 | 680 | 1500V |
| 75 | 750 | 1500V |
| 82 | 820 | 1500V |
| 91 | 910 | 1500V |
| 100 | 101 | 1500V |
| 110 | 111 | 1000V |
| 120 | 121 | 1000V |
| 130 | 131 | 1000V |
| 140 | 151 | 1000V |
| 150 | 161 | 1000V |
| 160 | 181 | 1000V |
| 180 | 201 | 1000V |
| 200 | 221 | 1000V |
| 220 | 241 | 600V |
| 240 | 271 | 600V |
| 270 | 301 | 600V |
| 300 | 331 | 600V |
| 360 | 361 | 600V |
| 390 | 391 | 600V |
| 430 | 431 | 600V |
| 470 | 471 | 600V |
| 510 | 511 | 200V |
| 560 | 561 | 200V |
| 620 | 621 | 200V |
| 680 | 681 | 200V |
| 750 | 751 | 200V |
| 820 | 821 | 200V |
| 910 | 911 | 200V |
| 1000 | 102 | 200V |
How to Order
Valid options are shown except for Capacitance
A typical PN isQPDB15291R0J1GU001 . This part number breaks down as follows:
High-Q Porcelain P90 Capacitors - QP Series
New Johanson Global Part Number Breakdown * Not all combinations create valid part numbers, ask our Apps Engineering Team for assistance creating a valid part number Request for assistance
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Example: QPDB15291R0J1GU001E Capacitors High-Q MLC P-Series, 1111, H1500V, Hi-Q P90, 1pF, ±5%, No Mark, Cu/Sn (RoHS), Default catalog item, 7" Reel Embossed Tape
Are P90 capacitors manufactured in North America?
Yes. Johanson P90 High-Q RF capacitors are manufactured in North America, providing engineers with a domestic source for critical RF power capacitors. This supports supply chain stability, responsive technical support, and dependable product availability
What are P90 High-Q RF capacitors used for?
P90 capacitors are designed for low-frequency power applications below 100 MHz, where high RF current capability, low ESR, and stable performance are essential. Typical applications include RF power amplifiers, impedance matching networks, industrial RF systems, and high-power RF equipment.
Why are porcelain RF capacitors used in high-power RF designs?
Porcelain dielectric capacitors offer excellent electrical stability, low losses, and the ability to handle high RF currents. These characteristics make them well suited for demanding RF power circuits where efficiency and thermal performance are critical
Can P90 capacitors improve RF power amplifier efficiency?
Yes. Low ESR and low loss characteristics help reduce power dissipation within matching and tuning networks, allowing more RF energy to be delivered to the load and improving overall system efficiency.
How do I select a capacitor for an RF power amplifier below 100 MHz?
When selecting a capacitor for RF power applications, engineers typically evaluate ESR, RF current capability, power handling, voltage rating, thermal performance, and frequency of operation. P90 capacitors are specifically designed to address these requirements in sub-100 MHz systems.
Contact Johanson Applications Engineers to help you select the capacitor for your design: RF Technical Support & Product Inquiries | Johanson