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HomeProductsCapacitorsCeramic Capacitors0603J200P400DQT
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0603J200P400DQT - Knowles Syfer

Manufacturer Part Number
0603J200P400DQT
Manufacturer
Knowles Syfer
Allelco Part Number
98D-0603J200P400DQT
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
39,039 pcs available, New & Original
Parts Description
CAP CER 0.4PF 200V C0G/NP0 0603
Package
0603 (1608 Metric)
Data sheet
0603J200P400DQT.pdf

HTML Datasheet

High Q Series.pdf

Environmental Information

Environmental Status Syfer.pdf
RoHs Status
ROHS3 Compliant
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Specifications

0603J200P400DQT Tech Specifications
Knowles Syfer - 0603J200P400DQT technical specifications, attributes, parameters and parts with similar specifications to Knowles Syfer - 0603J200P400DQT

Product Attribute Attribute Value
Manufacturer Knowles Syfer
Voltage - Rated 200V
Tolerance ±0.5pF
Thickness (Max) 0.031" (0.80mm)
Temperature Coefficient C0G, NP0
Size / Dimension 0.063" L x 0.031" W (1.60mm x 0.80mm)
Series -
Ratings -
Package / Case 0603 (1608 Metric)
Package Tape & Reel (TR)
Product Attribute Attribute Value
Operating Temperature -55°C ~ 125°C
Mounting Type Surface Mount, MLCC
Lead Style -
Lead Spacing -
Height - Seated (Max) -
Features High Q, Low Loss
Failure Rate -
Capacitance 0.4 pF
Base Product Number 0603J
Applications General Purpose

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8532.24.0020

Frequently Asked Questions(FAQ)

What makes the 0603J200P400DQT suitable for RF and high-frequency circuit design despite its tiny 0.4 pF capacitance?
The 0603J200P400DQT is engineered with high Q and low-loss characteristics that preserve signal integrity at microwave and RF frequencies where parasitic inductance becomes problematic. At 0.4 pF, the 0603J200P400DQT exhibits minimal self-resonant frequency shifts, making it effective for impedance matching networks, tuning circuits, and coupling applications in the GHz range. The C0G/NP0 dielectric ensures the 0603J200P400DQT maintains stable capacitance across temperature extremes (-55°C to 125°C), critical for frequency-sensitive designs where capacitance drift would detune resonant circuits or phase-shift compensation networks.
How does the ±0.5pF tolerance of the 0603J200P400DQT affect circuit tuning accuracy in oscillator and filter designs?
With a base capacitance of 0.4 pF, the ±0.5pF tolerance of the 0603J200P400DQT represents a ±125% tolerance band—substantially wider than typical film or larger ceramic capacitors. In fixed oscillator designs, this means the 0603J200P400DQT could drift between -0.1 pF (effective minimum) and +0.9 pF, causing frequency variation of several percent. For critical frequency applications, the 0603J200P400DQT should be used in circuits with post-tuning capability (varactor trimming or adjustable inductance) rather than as a standalone frequency-setting element. In filter networks, multiple 0603J200P400DQT units in parallel can average out tolerance effects, though this increases board real estate and parasitic coupling.
Can the 0603J200P400DQT handle 200V continuously in high-voltage analog and switching power applications?
The 0603J200P400DQT is rated for 200V DC, but sustained operation at rated voltage requires derating analysis. At 200V continuous across a 0.4 pF capacitive load, the 0603J200P400DQT experiences minimal energy storage (E = 0.5CV² ≈ 8 nanojoules), reducing thermal stress. However, the 0603J200P400DQT's physical size (0603 / 1.6mm × 0.8mm) limits heat dissipation; in switching applications with repetitive charging-discharging cycles, peak current handling and switching frequency determine whether the 0603J200P400DQT stays within safe thermal limits. For switching supplies above 1 MHz, the 0603J200P400DQT should be derated to 150V to ensure reliability margin and account for voltage transients.
Why is C0G/NP0 dielectric essential for the 0603J200P400DQT in temperature-stable analog circuits?
The 0603J200P400DQT uses C0G (IEC) / NP0 (EIA) dielectric, which guarantees zero temperature coefficient—capacitance change is less than ±30 ppm/°C across the operating range of -55°C to 125°C. For sub-picofarad tuning circuits, a 0.4 pF value in the 0603J200P400DQT experiencing even 50 ppm/°C drift (typical of X7R dielectrics) would shift capacitance by ±20 femtofarads, noticeably altering resonant frequencies in VCO and filter applications. The 0603J200P400DQT's C0G/NP0 specification eliminates this drift, enabling stable gain and phase response in precision instrumentation, frequency synthesis, and impedance-matching networks without external temperature compensation.
How does the 0603J200P400DQT compare to using air-gap or vacuum capacitors for ultra-low-loss RF applications?
While air-gap and vacuum capacitors offer superior Q factors (>5000) at high frequencies, the 0603J200P400DQT ceramic design achieves Q values around 1000–2000 in the VHF/UHF range, sufficient for most commercial RF applications. The 0603J200P400DQT integrates within surface-mount assembly workflows and eliminates mechanical variability; air-gap capacitors require manual tuning and occupy significantly more PCB area. For laboratory metrology or space-grade systems where Q>5000 is mandatory, air-gap capacitors remain necessary, but for production RF modules, IoT transceivers, and automotive radar, the 0603J200P400DQT provides an optimal balance of performance, size, cost, and manufacturing consistency.
What parasitic effects does the 0603J200P400DQT exhibit at microwave frequencies, and how should PCB layout compensate?
The 0603J200P400DQT's self-resonant frequency (SRF) is determined by its series inductance (~0.3–0.5 nH typical for 0603 ceramics) and 0.4 pF capacitance, yielding SRF in the range of 39–45 GHz. Below SRF, the 0603J200P400DQT behaves capacitively; above SRF, it becomes inductive. The 0603J200P400DQT is safe for use up to ~10–12 GHz in most RF designs. Above that, mounting inductance dominates: keep the 0603J200P400DQT lead lengths under 2mm, use low-impedance return paths on PCB ground layers, and minimize trace routing to and from the 0603J200P400DQT pads. Via stitching around the 0603J200P400DQT footprint reduces parasitic effects and improves high-frequency performance.
Is the 0603J200P400DQT appropriate for DC bias applications in varactor-tuned oscillators, and how does bias voltage affect stability?
The 0603J200P400DQT is not a varactor and does not exhibit voltage-dependent capacitance change. However, in varactor-tuned circuits, the 0603J200P400DQT can serve as a fixed dc-blocking or impedance-matching element in parallel with varactor diodes. When the 0603J200P400DQT is subjected to dc bias, its capacitance remains stable (±0.5pF tolerance band) because of the C0G/NP0 dielectric's insensitivity to dc field. This makes the 0603J200P400DQT reliable for circuits where tuning must be independent of bias stabilization, though designers must verify the 0603J200P400DQT remains within its 200V rating when combined with varactor bias and signal swings.
How does MSL1 rating for the 0603J200P400DQT simplify manufacturing and storage logistics?
MSL (Moisture Sensitivity Level) 1 on the 0603J200P400DQT means unlimited moisture exposure before solder reflow—no dry-bag storage, bake-out timers, or humidity-controlled cabinets required. This contrasts with MSL3 or higher components that demand tightly controlled humidity windows. For the 0603J200P400DQT, purchasing flexibility increases because inventory can be stored at ambient conditions without risk of moisture ingress degradation. Manufacturing throughput improves because pick-and-place lines do not require inter-stage desiccant stations for the 0603J200P400DQT. For distributed manufacturing or contract assembly partners with variable environmental controls, the 0603J200P400DQT's MSL1 status eliminates a common source of yield loss.
What is the practical difference between 0603J200P400DQT and 0603 X7R capacitors when substituting in legacy designs?
Substituting X7R 0603 ceramics for the 0603J200P400DQT introduces temperature-dependent capacitance drift (typically ±15% across -55°C to 125°C). For a 0.4 pF target, X7R variation could shift the actual value to 0.34–0.46 pF—a ±150 femtofarad swing. In tuned circuits, PLL bandwidth, and impedance-matching networks, this drift directly degrades frequency accuracy, phase noise, and impedance matching performance. The 0603J200P400DQT's C0G/NP0 dielectric eliminates this drift entirely. Substitution is viable only if circuit margins tolerate 10%+ capacitance variation, which is rare in RF tuning. For filter designs, the 0603J200P400DQT's stable response ensures predictable insertion loss and stopband attenuation across temperature.
How should the 0603J200P400DQT be de-rated in high-frequency switching circuits to ensure long-term reliability?
At switching frequencies above 2 GHz, the 0603J200P400DQT should be derated to 70–80% of its 200V rating (140–160V operating maximum) to account for voltage transients, ringing, and thermal hotspots that datasheet ratings do not capture. The 0603J200P400DQT's small footprint limits heat dissipation; in pulsed or high-duty-cycle applications, current surges through the 0603J200P400DQT can generate localized temperature rise beyond ambient. Simulation of the 0603J200P400DQT's impedance across your frequency band identifies resonance peaks where current amplification occurs; at those frequencies, operating voltage should be further reduced. For automotive or aerospace applications, derate the 0603J200P400DQT to 50V maximum to maintain design margin against component variability and long-term aging.
Why does the 0603J200P400DQT specify ±0.5pF absolute tolerance rather than a percentage tolerance, and how does this affect design calculations?
At sub-picofarad capacitances, percentage-based tolerances become impractical—a ±10% tolerance on 0.4 pF would be ±0.04 pF, smaller than typical manufacturing variation and measurement precision. The 0603J200P400DQT uses absolute ±0.5pF tolerance because it reflects the actual process capability of ultra-thin ceramic dielectric layers at these small values. For a capacitive voltage divider using the 0603J200P400DQT, the tolerance band significantly impacts output impedance and attenuation: if the 0603J200P400DQT drifts from 0.4 pF to 0.9 pF (worst case), impedance changes by 56%. Design calculations must include both the nominal 0.4 pF value and the ±0.5pF range; margin analysis should treat the 0603J200P400DQT's tolerance as a worst-case boundary condition rather than a negligible error term.
Can the 0603J200P400DQT be used in parallel configurations to reduce effective tolerance and improve frequency stability?
Yes, parallel connection of multiple 0603J200P400DQT units reduces effective tolerance through averaging. Two 0603J200P400DQT units in parallel nominally yield 0.8 pF with combined tolerance of ±0.5pF (not ±1.0pF), because tolerance bands partially overlap; statistical tolerance analysis shows effective tolerance reduces to approximately ±0.35pF for dual units. Four 0603J200P400DQT capacitors in parallel approach 1.6 pF ±0.25pF, enabling tighter frequency control. However, parallel configurations increase parasitic coupling and can introduce unexpected resonances; PCB layout must physically space multiple 0603J200P400DQT units to prevent capacitive coupling between traces. Parallel 0603J200P400DQT banks are practical for tuning-range extension and tolerance improvement in VCO and filter designs, though cost and board area increase proportionally.
How does the 0603J200P400DQT's RoHS3 compliance affect supply chain availability and end-of-life planning?
RoHS3 compliance means the 0603J200P400DQT contains no lead, cadmium, or restricted hazardous substances, ensuring legality in EU, California, and other regulated markets. This compliance status is stable for the 0603J200P400DQT because ceramic capacitors are inherently RoHS3-compliant materials; unlike active components with planned obsolescence windows, the 0603J200P400DQT has no scheduled discontinuation date tied to RoHS transitions. Supply chain risk for the 0603J200P400DQT remains low: Knowles Syfer maintains active production, and the 0603J200P400DQT's passive nature means drop-in equivalents from other manufacturers exist. For long-lifecycle products (automotive, industrial, medical), the 0603J200P400DQT's RoHS3 status provides regulatory continuity without requiring redesign.
What is the equivalent circuit model of the 0603J200P400DQT at RF frequencies, and which parasitic parameters dominate design performance?
The 0603J200P400DQT equivalent circuit consists of a 0.4 pF capacitance in series with approximately 0.3–0.5 nH inductance and 0.5–2 ohm series resistance, plus a parallel parasitic resistance (ESR) of 1–10 kΩ. At RF frequencies below 5 GHz, the series inductance and resistance dominate; the 0603J200P400DQT behaves nearly as an ideal capacitor. Above 10 GHz, series inductance becomes problematic—the 0603J200P400DQT begins behaving inductively, limiting practical use. For impedance matching and tuning circuits operating at 1–3 GHz, designers can typically model the 0603J200P400DQT as a pure 0.4 pF capacitor with negligible losses. For precision measurements or circuits above 8 GHz, full equivalent-circuit modeling of the 0603J200P400DQT including series inductance is necessary for accurate simulation and layout optimization.

Parts with Similar Specifications

The three parts on the right have similar specifications to Knowles Syfer 0603J200P400DQT

Product Attribute 0603J200P300DQT 0603J200P400CQT 0603J200P400HQT 0603J200P200DQT
Part Number 0603J200P300DQT 0603J200P400CQT 0603J200P400HQT 0603J200P200DQT
Manufacturer Knowles Syfer Knowles Syfer Knowles Syfer Knowles Syfer
Features - - - Simultaneous Sampling
Ratings - - - -
Size / Dimension - - - -
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
Thickness (Max) - - - -
Series - - - -
Height - Seated (Max) - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Temperature Coefficient - - - -
Capacitance - - - -
Voltage - Rated - - - -
Lead Spacing - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Tolerance - - - -
Applications - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Failure Rate - - - -
Lead Style - - - -

0603J200P400DQT Datasheet PDF

Download 0603J200P400DQT pdf datasheets and Knowles Syfer documentation for 0603J200P400DQT - Knowles Syfer.

HTML Datasheet
High Q Series.pdf
Environmental Information
Environmental Status Syfer.pdf

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0603J200P400DQT Image

0603J200P400DQT

Knowles Syfer
98D-0603J200P400DQT

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