The 2220Y1K00561KCT from Knowles Syfer represents a high-voltage multilayer ceramic capacitor engineered for applications where mechanical stress tolerance and voltage stability converge. This 560 pF capacitor with ±10% tolerance operates at a rated voltage of 1000V (1 kV), employing C0G (NP0, Class 1B) dielectric to deliver predictable performance across a -55°C to 125°C temperature range. The C0G formulation ensures near-zero temperature coefficient, making it well-suited for precision timing circuits, RF filtering, and voltage-sensitive analog designs where capacitance drift would compromise signal integrity.
Belonging to the FlexiCap™ series, the 2220Y1K00561KCT incorporates soft termination technology, a design feature that absorbs mechanical strain imposed by PCB flexure during assembly, thermal cycling, or field operation. This characteristic addresses a common failure mode in boardflex-sensitive applications—environments where substrates bend under load or thermal expansion, such as automotive underhood electronics, industrial control modules, and portable instrumentation. Soft termination mitigates crack propagation at the solder interface, enhancing long-term reliability without requiring additional mechanical reinforcement.
The 2220 (5750 Metric) surface-mount package measures 0.224" L × 0.197" W (5.70 mm × 5.00 mm) with a maximum thickness of 0.165" (4.20 mm). This footprint balances power handling and board density, offering sufficient dielectric volume to support 1 kV operation while remaining compatible with automated pick-and-place processes. The MLCC construction enables low equivalent series resistance and inductance, favorable for high-frequency decoupling and snubber networks in switching power supplies, motor drives, and pulse-width modulation circuits.
C0G dielectric distinguishes this capacitor from higher-permittivity alternatives by maintaining stable capacitance under voltage bias and temperature excursions. Unlike X7R or Y5V formulations, C0G does not exhibit piezoelectric noise or aging effects, making the 2220Y1K00561KCT a practical choice for resonant circuits, reference voltage filtering, and sensor signal conditioning. The 1 kV rating accommodates mains-referenced designs, isolated gate drivers, and medium-voltage energy storage applications, while the ±10% tolerance remains acceptable for bulk energy storage and general-purpose filtering where precise capacitance is less critical than voltage margin.
The component ships in tape and reel packaging with MSL 1 classification, requiring no controlled humidity storage prior to reflow. RoHS3 compliance and REACH unaffected status support global supply chain requirements, while the ECCN EAR99 designation indicates no export licensing restrictions for most destinations. The active production status and current inventory position the 2220Y1K00561KCT as a stable platform component for new designs and sustaining engineering programs alike.
2220Y1K00561KCT (1)
Finding a Practical Replacement for Knowles Syfer 2220Y1K00561KCT in 1kV C0G/NP0 MLCC Designs
Replacing the Knowles Syfer 2220Y1K00561KCT is usually driven by supply availability, second-source approval, cost control, or qualification of alternate vendors for long-life assemblies. Because this device is not just a standard 560 pF ceramic capacitor but a 1kV C0G/NP0 2220 MLCC with FlexiCap soft termination, the replacement process must consider electrical behavior, board-flex tolerance, package geometry, termination structure, and long-term reliability.
Potential replacement or alternative part numbers commonly evaluated for this type of design include:
| Manufacturer | Candidate Part Number |
|---|---|
| Knowles Syfer | 2220Y1K00561KCT |
| KEMET | C2220C561KDGACTU |
| Murata | GRM55C3A561KA01L |
| TDK | C5750C0G3A561K230KA |
| Vishay | VJ2220A561KXGAT5Z |
The main challenge is that matching capacitance, voltage rating, and package size is not always enough. A capacitor may be electrically close but mechanically less suitable if it lacks soft termination. Another option may offer similar C0G stability but differ in thickness, availability, or approved soldering profile. A reliable 2220Y1K00561KCT replacement should therefore be selected by comparing the full application environment, not only the nominal capacitance value.
What the Knowles Syfer 2220Y1K00561KCT Actually Provides in the Circuit
The Knowles Syfer 2220Y1K00561KCT is a surface-mount multilayer ceramic capacitor rated at 560 pF, ±10% tolerance, 1000 VDC, using C0G/NP0 dielectric in a 2220 imperial case size, also known as 5750 metric. It belongs to the Knowles Syfer FlexiCap series, which uses soft termination to reduce the risk of cracking caused by PCB bending, thermal cycling, or mechanical stress.
| Parameter | Knowles Syfer 2220Y1K00561KCT Characteristics | Replacement Relevance |
|---|---|---|
| Capacitance | 560 pF | Replacement should normally stay at 560 pF unless the circuit allows retuning |
| Tolerance | ±10% | Suitable alternatives should maintain ±10% or tighter tolerance |
| Rated voltage | 1000 VDC | Replacement must meet or exceed the working voltage plus derating margin |
| Dielectric | C0G/NP0 | Needed where capacitance stability, low loss, and low voltage coefficient matter |
| Package | 2220 / 5750 metric | Affects PCB pad compatibility and creepage/clearance assumptions |
| Termination | FlexiCap soft termination | Relevant for board-flex-sensitive applications |
| Operating temperature | -55°C to +125°C | Replacement should support the same environmental range |
| Mounting | Surface-mount MLCC | Replacement must match reflow process and land pattern requirements |
| Compliance | RoHS3, REACH unaffected, MSL 1 | Important for production handling and regulatory continuity |
The original part is suited for high-voltage filtering, resonant networks, snubbers with low capacitance requirements, RF coupling or bypassing where C0G stability is required, and board-flex-sensitive assemblies. Its C0G/NP0 dielectric provides stable capacitance across temperature and voltage compared with X7R or X5R capacitors. This matters when the capacitor is part of a timing, tuning, impedance-shaping, or high-frequency path.
The FlexiCap soft termination is a key differentiator. In large MLCC packages such as 2220, mechanical stress can cause ceramic cracking. If the original design selected the Knowles Syfer 2220Y1K00561KCT because of board flex, vibration, connector insertion force, or depanelization stress, a standard-termination replacement may require additional validation, layout review, or process controls.
Candidate Replacements for Knowles Syfer 2220Y1K00561KCT: Electrical and Mechanical Fit
The following table compares candidate replacement parts from the perspective of practical substitution. Exact orderable suffixes should be verified against current manufacturer datasheets, especially for termination finish, packaging, and automotive or flexible-termination variants.
| Manufacturer | Part Number | Key Specifications | Product Features | Typical Applications | Why It Can Replace the Original Part | Main Differences or Limitations | Recommended Usage |
|---|---|---|---|---|---|---|---|
| Knowles Syfer | 2220Y1K00561KCT | 560 pF, ±10%, 1000 V, C0G/NP0, 2220 MLCC | FlexiCap soft termination, high-voltage ceramic construction, stable dielectric | High-voltage filtering, board-flex-sensitive circuits, precision capacitive networks | Original reference device; best baseline for fit, function, and qualification | Availability or cost may drive second-source evaluation | Use when original qualification must be maintained or when board-flex resistance is required |
| KEMET | C2220C561KDGACTU | 560 pF, ±10%, 1000 V class, C0G, 2220 MLCC | Stable C0G dielectric, high-voltage MLCC construction, tape-and-reel availability | High-voltage bypassing, coupling, industrial electronics, power conversion control circuits | Matches the main electrical profile: capacitance, tolerance, voltage class, dielectric, and package size | Termination technology may not be identical to Knowles Syfer FlexiCap unless the selected KEMET variant includes flexible termination | Good general electrical replacement where mechanical stress level is moderate and land-pattern compatibility is confirmed |
| Murata | GRM55C3A561KA01L | 560 pF, ±10%, 1000 V, C0G, 2220-size MLCC | Low-loss Class I dielectric, strong supplier availability, stable capacitance behavior | Precision filtering, RF-related networks, high-voltage signal conditioning | Provides the same capacitance value, voltage rating, dielectric class, and comparable 2220 footprint | Standard GRM construction may not provide the same soft-termination behavior as FlexiCap | Suitable where electrical stability is the main requirement and board bending is controlled |
| TDK | C5750C0G3A561K230KA | 560 pF, ±10%, 1000 V, C0G, 5750 metric MLCC | C0G dielectric, high-voltage rating, 5750 metric body size | Industrial power supplies, HV signal filtering, low-loss capacitive paths | Comparable capacitance, dielectric, voltage rating, and package format support substitution | Thickness and mechanical stress tolerance must be checked against the original assembly constraints | Appropriate for high-voltage C0G replacement where dimensional clearance and reflow profile are acceptable |
| Vishay | VJ2220A561KXGAT5Z | 560 pF, ±10%, 1000 V class, C0G/NP0 family, 2220 MLCC | High-voltage MLCC platform, stable Class I dielectric option, tape packaging | HV filtering, coupling, measurement circuits, industrial control electronics | Aligns with the required capacitance, tolerance, dielectric behavior, voltage class, and 2220 mounting style | Full suffix must be reviewed for exact voltage code, termination type, and packaging; flex termination may differ from Knowles Syfer | Consider when multi-vendor sourcing is needed and the design can tolerate supplier-specific construction differences |
Among these alternatives, the KEMET C2220C561KDGACTU, Murata GRM55C3A561KA01L, TDK C5750C0G3A561K230KA, and Vishay VJ2220A561KXGAT5Z are primarily electrical and footprint-oriented replacement candidates. The original Knowles Syfer 2220Y1K00561KCT remains stronger where soft termination is part of the reliability requirement.
Comparing Knowles Syfer 2220Y1K00561KCT Replacement Options by Engineering Trade-Offs
A suitable alternative should be evaluated against the function of the capacitor in the actual circuit. If the capacitor is used in a precision or high-frequency path, C0G/NP0 behavior should not be replaced by X7R or other Class II dielectrics without circuit validation. If the part is placed near connectors, board edges, mounting screws, or depanelization stress zones, termination structure becomes a larger factor than nominal capacitance.
| Decision Factor | Knowles Syfer 2220Y1K00561KCT | KEMET C2220C561KDGACTU | Murata GRM55C3A561KA01L | TDK C5750C0G3A561K230KA | Vishay VJ2220A561KXGAT5Z |
|---|---|---|---|---|---|
| Electrical compatibility | Baseline: 560 pF, ±10%, 1kV, C0G/NP0 | Strong match for capacitance, tolerance, voltage, and dielectric | Strong electrical match with stable C0G behavior | Strong match for 5750 metric high-voltage C0G use | Strong candidate if suffix confirms voltage and dielectric requirements |
| Mechanical compatibility | 2220 case with FlexiCap soft termination | 2220 footprint; termination must be verified | 2220-class body; generally standard termination | 5750 metric body; thickness must be checked | 2220 footprint; termination and finish depend on full suffix |
| Board-flex performance | Advantage due to soft termination | Depends on selected termination option | May require more conservative PCB handling | May need layout and process validation in stressed boards | Must verify if flexible termination version is required |
| Capacitance stability | C0G/NP0 stability across temperature and voltage | Comparable Class I dielectric behavior | Comparable C0G stability | Comparable C0G stability | Comparable if C0G/NP0 version is confirmed |
| High-voltage suitability | 1000 V rating with original qualification baseline | Suitable for 1kV-class designs with derating review | Suitable for 1kV-class C0G applications | Suitable for high-voltage 5750 metric MLCC applications | Suitable if the exact voltage code is confirmed |
| Reliability considerations | Strong option for mechanically stressed assemblies | Good electrical replacement; mechanical behavior depends on construction | Good supplier base, but board flex must be managed | Good for controlled mechanical environments | Useful second-source option with suffix-level verification |
| Package availability | Original tape-and-reel part; availability may vary | Broad distribution availability is common | Often strong global availability | Common industrial MLCC supplier | Useful alternate sourcing path |
| Cost considerations | May carry premium due to FlexiCap construction | Often competitive for standard MLCC sourcing | May be favorable where Murata is already approved | Cost depends on voltage and case thickness | Can support sourcing flexibility |
| Best-fit scenario | Designs requiring the original soft-termination behavior | General 2220 560 pF 1kV C0G replacement with validation | Electrically stable replacement where mechanical stress is controlled | Industrial high-voltage designs with verified clearance and thickness | Multi-source qualification where exact suffix is reviewed |
| Main limitation | Supply or cost constraints | Not automatically equivalent to FlexiCap unless termination matches | Mechanical robustness may differ from FlexiCap | Dimensional and termination details require checking | Full manufacturer coding must be confirmed before approval |
For a direct engineering replacement, the first filter should be electrical: 560 pF capacitance, ±10% tolerance, 1000 V rating, and C0G/NP0 dielectric. The second filter should be physical compatibility: 2220 or 5750 metric case size, solder pad compatibility, component thickness, and reflow suitability. The third filter should be reliability: whether the application needs a soft-termination MLCC comparable to the Knowles Syfer FlexiCap construction.
If the original capacitor is installed in a mechanically sensitive area, the safest substitution strategy is to prioritize flexible-termination alternatives or continue using the Knowles Syfer 2220Y1K00561KCT. If the circuit is mechanically stable and the capacitor mainly serves a high-voltage, low-loss electrical function, the KEMET C2220C561KDGACTU, Murata GRM55C3A561KA01L, TDK C5750C0G3A561K230KA, and Vishay VJ2220A561KXGAT5Z can be reviewed as practical replacement candidates.
For current stock, pricing, and sourcing support for the Knowles Syfer 2220Y1K00561KCT and compatible replacement parts, obtain quotations through IC-Components.com or contact Info@IC-Components.com.
