The Knowles Syfer 2220J1K50561KXR is a multilayer ceramic capacitor engineered for applications requiring stable capacitance performance across temperature extremes and elevated voltage conditions. This surface-mount component delivers 560 pF capacitance with ±10% tolerance, rated for continuous operation at 1500V in a compact 2220 (5750 metric) form factor measuring 0.224" × 0.197" × 0.098" (5.70mm × 5.00mm × 2.50mm).
Built on X7R dielectric formulation, the capacitor maintains consistent electrical characteristics from -55°C to 125°C, exhibiting capacitance variation within ±15% across this operating range. This temperature stability positions X7R ceramic capacitors between the tighter tolerance of C0G/NP0 types and the higher volumetric efficiency of Y5V alternatives, making the 2220J1K50561KXR suitable for general-purpose filtering, decoupling, and AC coupling in industrial power supplies, motor drives, and high-voltage switching circuits where moderate capacitance drift is acceptable.
The 1.5kV voltage rating accommodates designs with bus voltages up to several hundred volts DC while maintaining adequate derating margin—a common requirement in off-line converters, IGBT gate drivers, and three-phase inverter topologies. The MLCC construction provides low equivalent series resistance and inductance compared to film or electrolytic alternatives, supporting high-frequency operation in switched-mode power stages and reducing impedance in DC link applications.
Physical characteristics include a 2220 footprint that balances current-handling capability with board space efficiency, particularly in layouts where through-hole components are being replaced or where voltage clearance demands larger package dimensions. The maximum thickness of 2.50mm allows clearance under typical heat sink profiles and connector assemblies. Surface-mount configuration enables automated placement and reflow soldering, with MSL-1 rating permitting unlimited floor life under standard warehouse conditions without moisture-related assembly concerns.
Active product status from Knowles Syfer ensures consistent availability for both prototype builds and volume manufacturing, with RoHS3 and REACH compliance supporting regulatory requirements in automotive, industrial, and consumer markets. The EAR99 ECCN classification facilitates export in most commercial applications without specialized licensing.
This ceramic capacitor serves designs that prioritize voltage withstand and thermal range over ultra-tight capacitance tolerance, including three-phase rectifiers, isolated DC-DC converters, snubber networks across power semiconductors, and EMI filter stages in industrial controllers. The X7R characteristic curve supports AC-coupled signal paths and energy storage elements where voltage coefficient effects remain within acceptable limits for the application's performance envelope.
2220J1K50561KXR (1)
Replacing Knowles Syfer 2220J1K50561KXR Without Creating High-Voltage MLCC Design Risk
Finding an equivalent for Knowles Syfer 2220J1K50561KXR is usually driven by stock availability, approved-vendor-list expansion, lifecycle control, or cost optimization. Because this component is a 560 pF, 1.5 kV, X7R ceramic capacitor in a 2220 surface-mount package, replacement selection is not only a capacitance match. The substitute must also satisfy voltage stress, temperature behavior, PCB footprint compatibility, dielectric performance, reliability expectations, and assembly constraints.
Potential replacement and alternative part numbers for 2220J1K50561KXR include:
| Manufacturer | Candidate Part Number |
|---|---|
| Knowles Syfer | 2220J1K50561KXR |
| TDK | C5750X7R3D561K230KA |
| Murata | GRM55DR73D561KW01L |
| KYOCERA AVX | 2220GC561KAT1A |
| Johanson Dielectrics | 202R18W561KV4E |
These parts are best evaluated as high-voltage 560 pF 2220 MLCC replacement options, not as automatic drop-in substitutes. The final choice depends on whether the circuit uses the capacitor for high-voltage coupling, snubbing, EMI filtering, resonant shaping, protection networks, or general-purpose bypassing.
What the Knowles Syfer 2220J1K50561KXR Ceramic Capacitor Defines as the Baseline
The original Knowles Syfer 2220J1K50561KXR is a surface-mount multilayer ceramic capacitor with the following baseline characteristics:
| Parameter | Knowles Syfer 2220J1K50561KXR |
|---|---|
| Capacitance | 560 pF |
| Tolerance | ±10% |
| Rated Voltage | 1500 VDC |
| Dielectric | X7R |
| Operating Temperature | -55°C to +125°C |
| Package | 2220 / 5750 metric |
| Dimensions | 5.70 mm x 5.00 mm |
| Thickness | Up to 2.50 mm |
| Mounting Type | Surface-mount MLCC |
| Application Class | General-purpose high-voltage ceramic capacitor |
| Compliance | RoHS3 compliant, REACH unaffected |
| MSL | Level 1 |
For replacement work, the 560 pF capacitance and ±10% tolerance define the electrical target, but the 1.5 kV rating is the main screening factor. A lower-voltage MLCC should not be used unless the circuit voltage stress, derating policy, transient exposure, and regulatory margin have been reviewed.
The X7R dielectric provides a practical balance of capacitance density, temperature stability, and high-voltage availability. However, X7R capacitance can vary with DC bias, temperature, and aging. At 560 pF, DC bias loss is generally less severe than in high-capacitance MLCCs, but high-voltage designs should still consider effective capacitance under operating conditions.
The 2220 package is also part of the replacement decision. It provides larger electrode spacing and voltage handling capability than smaller MLCC packages, but it is more sensitive to board flex and mechanical stress. A substitute should match the 2220 land pattern, soldering process, and maximum mounted height where enclosure spacing or high-voltage clearance is constrained.
Typical uses include high-voltage filtering, coupling and decoupling in power supplies, pulse circuits, EMI suppression networks, voltage multiplier stages, lighting electronics, industrial controls, and protection-related RC networks. In these applications, a replacement part must maintain voltage margin and dielectric behavior rather than simply matching nominal capacitance.
Candidate 560 pF 1.5 kV / 2 kV 2220 MLCC Alternatives for 2220J1K50561KXR
The following table compares practical candidate replacements for Knowles Syfer 2220J1K50561KXR. Several alternatives use a 2 kV voltage rating, which can be acceptable when package size, capacitance, tolerance, temperature coefficient, and assembly limits are compatible. A higher voltage rating may improve derating margin, but it can also affect thickness, cost, availability, and mechanical fit.
| Manufacturer | Part Number | Key Specifications | Product Features | Typical Applications | Why It Can Replace the Original Part | Main Differences or Limitations | Recommended Usage |
|---|---|---|---|---|---|---|---|
| Knowles Syfer | 2220J1K50561KXR | 560 pF, ±10%, 1.5 kV, X7R, 2220, -55°C to +125°C | Original high-voltage MLCC, RoHS3, MSL 1 | General-purpose high-voltage filtering, coupling, snubber and EMI networks | Direct baseline part with the same manufacturer and specified parameters | Availability may vary; exact termination and ordering code should be confirmed | Preferred when maintaining original BOM approval and qualification history |
| TDK | C5750X7R3D561K230KA | 560 pF, ±10%, X7R, 2220 / 5750 metric, 2 kV class | High-voltage MLCC family, compact SMD construction | HV power supplies, industrial electronics, EMI filtering, coupling | Same capacitance, tolerance, dielectric family, and 2220 footprint with higher voltage class | Check thickness, termination finish, and DC bias behavior against the original | Good alternative when additional voltage derating margin is desired |
| Murata | GRM55DR73D561KW01L | 560 pF, ±10%, X7R, 2220 size, 2 kV class | GRM series MLCC with broad industry usage | High-voltage decoupling, filtering, signal coupling, protection circuits | Matches capacitance class, dielectric type, tolerance, and package size while offering 2 kV rating | Murata mechanical dimensions and solder fillet behavior should be checked on dense layouts | Suitable for designs needing a widely sourced 2220 high-voltage MLCC |
| KYOCERA AVX | 2220GC561KAT1A | 560 pF, ±10%, X7R, 2220, high-voltage 2 kV class | Established high-voltage ceramic capacitor option | Power conversion, HV filtering, lighting, industrial modules | Comparable capacitance, X7R dielectric, tolerance, and 2220 mounting format | Voltage code, height, and qualification requirements should be verified from current datasheet | Useful for alternate AVL qualification and second-source planning |
| Johanson Dielectrics | 202R18W561KV4E | 560 pF, ±10%, X7R-class high-voltage ceramic, 2220/R18 format, 2 kV class | High-voltage MLCC designed for elevated voltage stress | HV coupling, resonant circuits, RF-related HV networks, pulse applications | Same nominal capacitance and similar high-voltage 2220 MLCC category | Part coding and dimensional details differ from standard 2220 naming; confirm footprint and voltage conditions | Appropriate where high-voltage specialty MLCC sourcing is preferred |
Among these candidates, TDK C5750X7R3D561K230KA and Murata GRM55DR73D561KW01L are common choices when the design can accept a 2 kV rated MLCC in the same 2220 footprint. KYOCERA AVX 2220GC561KAT1A provides another practical second-source option for high-voltage ceramic capacitor replacement. Johanson Dielectrics 202R18W561KV4E is more specialized and should be checked carefully against footprint, voltage waveform, and mechanical constraints.
Engineering Comparison of 2220J1K50561KXR Replacement Options
A suitable replacement for 2220J1K50561KXR should be selected by comparing how each capacitor behaves in the actual circuit, not only by matching catalog values. The table below focuses on engineering trade-offs.
| Evaluation Factor | Knowles Syfer 2220J1K50561KXR | TDK C5750X7R3D561K230KA | Murata GRM55DR73D561KW01L | KYOCERA AVX 2220GC561KAT1A | Johanson Dielectrics 202R18W561KV4E |
|---|---|---|---|---|---|
| Electrical Compatibility | Direct match: 560 pF, ±10%, 1.5 kV, X7R | Strong match with higher 2 kV voltage class | Strong match with higher 2 kV voltage class | Strong match with high-voltage 560 pF X7R profile | Strong match for high-voltage 560 pF MLCC use |
| Voltage Derating Margin | Baseline 1.5 kV rating | May provide more derating headroom | May provide more derating headroom | May provide more derating headroom | May provide more derating headroom |
| Mechanical Compatibility | Original 2220 / 5750 metric footprint | 2220 / 5750 metric; verify height | 2220 class; verify exact body and height | 2220 footprint; verify thickness and pad fit | R18 / 2220 equivalent format; confirm land pattern |
| Dielectric Behavior | X7R, suitable for general-purpose HV use | X7R; effective capacitance should be checked under bias | X7R; check capacitance stability in circuit conditions | X7R; suitable for general HV filtering and coupling | X7R-class HV ceramic; check datasheet conditions |
| Reliability Considerations | Known baseline if already qualified | Good for second-source qualification; review flex and solder stress | Broadly used MLCC platform; review board flex risk | Suitable for AVL expansion; review termination and solder profile | Often selected for HV specialty use; confirm application ratings |
| Package Availability | Depends on current stock | Usually available through major MLCC channels | Usually available through major MLCC channels | Common second-source option | May be more application-specific depending on distributor stock |
| Cost Considerations | May be preferred if already approved | Higher voltage rating may affect price | Brand availability can influence cost | Competitive second-source candidate | Specialty sourcing may influence cost |
| Best Application Fit | Existing designs requiring the original Knowles Syfer part | Designs needing extra voltage margin without package change | Designs needing a broad-source high-voltage MLCC alternative | Designs requiring another established 2220 HV MLCC supplier | Designs where high-voltage ceramic specialization is valued |
| Main Advantage | No redesign if same part is available | Higher voltage class in same general footprint | Strong supplier ecosystem and compatible ratings | Good AVL diversification | Useful for high-voltage focused capacitor sourcing |
| Main Limitation | Supply dependence on original part | Must confirm height and solder process | Must confirm actual rated conditions and dimensions | Verify current datasheet before approval | Requires careful code and footprint verification |
For most replacement evaluations, the first screening step is to reject any candidate below 1.5 kV unless the circuit has been revalidated. The next step is to confirm the 2220 land pattern, maximum component height, soldering profile, and spacing to nearby conductors. After that, compare effective capacitance, dielectric aging, insulation resistance, dissipation factor, and pulse or ripple conditions if the capacitor is exposed to fast transients or AC stress.
If the design is already qualified around Knowles Syfer 2220J1K50561KXR, using the same part remains the lowest-risk procurement path. If the goal is a second source, TDK C5750X7R3D561K230KA, Murata GRM55DR73D561KW01L, KYOCERA AVX 2220GC561KAT1A, and Johanson Dielectrics 202R18W561KV4E are reasonable candidates for engineering review, provided current datasheets and sample testing confirm compatibility.
For pricing, availability, and sourcing support for 2220J1K50561KXR or compatible replacement parts, obtain quotations through IC-Components.com or email Info@IC-Components.com.
