0402B222K250CT - 2200pF 25V X7R 0402 MLCC | Walsin
MPN: 0402B222K250CT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.01 | $0.01 |
| 10 | $0.005 | $0.05 |
| 100 | $0.002 | $0.20 |
| 500 | $0.001 | $0.50 |
| 1,000 | $0.0007 | $0.70 |
Drop-in alternatives for 0402B222K250CT β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
0402B222K500CT
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
C0402C222K3RACTU
β Drop-Inπ Reference alternative (not in catalog)
CGJ2B2X7R1E222K050BA
β Drop-Inπ Reference alternative (not in catalog)
0402B222K250CT Maximum Ratings & Electrical Characteristics
| Capacitance | 2200 pF (2.2 nF) |
| Tolerance | +/-10% |
| Rated Voltage (DC) | 25 V |
| Dielectric | X7R (Class 2) |
| Temperature Characteristics | +/-15% over -55C to +125C |
| Package | 0402 (1005 Metric) |
| Package Dimensions | 1.0 mm x 0.5 mm |
| Mounting Type | Surface Mount (SMD/SMT) |
| Operating Temperature | -55C to +125C |
| Termination Style | SMD termination, nickel barrier |
| Packaging | Tape & Reel (T/R) |
| Type | Multilayer Ceramic Capacitor (MLCC) |
| Application Category | General purpose / decoupling / bypass |
0402B222K250CT 1.0 mm x 0.5 mm Pin Configuration Guide
Complete pinout information for 0402B222K250CT (1.0 mm x 0.5 mm package). Learn about pin numbering, functions, and connection diagrams. Refer to the manufacturer datasheet for exact footprint and soldering guidelines. Common applications include circuit design and PCB assembly.
No detailed pinout data available for 0402B222K250CT.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
0402B222K250CT is suitable for 6 applications: Power Supply Decoupling, DC-DC Converter Input/Output Filtering, Analog Signal Coupling and Bypass, EMI Input Filters, Consumer Electronics General Purpose, Industrial Control Boards.
Power Supply Decoupling
The 0402B222K250CT's 2.2 nF value, 25 V rating, and X7R temperature stability make it ideal for high-frequency decoupling at microcontroller and FPGA power pins. Its small 0402 (1.0 mm x 0.5 mm) footprint allows placement within millimeters of the IC supply pin, minimizing loop inductance and improving high-frequency bypass effectiveness versus larger packages. In a typical 5 V or 12 V rail, the 25 V rating provides ample margin, and the +/-10% tolerance keeps the bypass impedance predictable. Pair it with bulk 10 uF capacitance upstream to cover lower frequencies; the X7R DC-bias derating is negligible at 2.2 nF values on low-voltage rails.
Recommended
DC-DC Converter Input/Output Filtering
In buck and boost converter designs, the 0402B222K250CT serves as a snubber or EMI-filter element across switch nodes and input terminals, where its 2.2 nF capacitance forms an RC damper with a series resistor to damp ring frequencies in the tens of MHz. The X7R dielectric tolerates the ripple current and -55C to +125C temperature excursions typical of power conversion, and the compact 0402 case keeps the damping network close to the switch node, minimizing parasitic loop area. Because snubber effectiveness depends on stable capacitance, verify the X7R DC-bias curve at the switch-node voltage; at 25 V rated parts on 12 V rails, expect modest effective capacitance reduction.
Recommended
Analog Signal Coupling and Bypass
The 0402B222K250CT works as an AC coupling or reference-bypass capacitor in analog front ends. At 2.2 nF, its impedance at audio and intermediate frequencies (about 36 ohms at 2 MHz, 7.2 kohms at 10 kHz) suits RF and IF coupling stages and op-amp reference-pin bypassing where a smaller capacitor sets a defined high-pass corner with a bias resistor. The X7R dielectric keeps the transfer function stable across -55C to +125C, and the non-polarized chip requires no orientation. For precision timing or sample-hold positions, substitute a C0G dielectric instead, since X7R exhibits voltage coefficient and piezoelectric behavior that can inject microphonic noise.
Recommended
EMI Input Filters
The 0402B222K250CT is commonly used as the X-capacitor element in board-level EMI input filters, where its 2.2 nF value with a common-mode choke or series ferrite attenuates conducted emissions in the 1 MHz to 30 MHz band. The 25 V rating covers typical 5 V, 12 V, and 24 V-derived supplies with derating, and the X7R dielectric maintains filtering performance over the full -55C to +125C industrial range. Its 0402 footprint permits placement immediately at the connector entry point, which is critical for filter effectiveness because any trace before the capacitor becomes an antenna. Verify creepage and clearance requirements for the applicable safety standard in mains-referenced designs.
Recommended
Consumer Electronics General Purpose
In consumer products such as set-top boxes, wearables, and IoT devices, the 0402B222K250CT fills general-purpose decoupling, coupling, and timing-support roles where cost and placement density dominate. At sub-cent pricing in volume (approximately $0.0007 per unit at 1000 pieces on LCSC as of 2026-09-14), it enables aggressive BOM cost targets, and the 0402 case supports the dense double-sided layouts typical of compact consumer PCBs. The +/-10% tolerance is sufficient for digital and mixed-signal bypass duty. Designers should note X7R capacitance aging (a few percent per decade-hour) and account for it in marginal filter designs, or reserve C0G for those positions.
Recommended
Industrial Control Boards
On industrial PLC I/O modules, motor-control interface boards, and sensor conditioning circuits, the 0402B222K250CT provides robust decoupling and filtering across the -55C to +125C range demanded by factory-floor environments. The 25 V rating supports 24 V industrial logic rails with adequate margin, and the X7R dielectric's +/-15% temperature characteristic keeps filter corners stable across thermal cycles. Chip MLCC construction with nickel-barrier terminations survives reflow, wave, and rework soldering profiles used in industrial assembly. For vibration-prone installations, confirm board flexure limits, since small 0402 ceramics are susceptible to flex cracking; use edgemount orientation away from board edges.
Recommended
Recommended Products Summary
Engineering reference data for 0402B222K250CT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 0402B222K500CT | C0402C222K3RACTU | CGJ2B2X7R1E222K050BA |
|---|---|---|---|---|
| Package | 0402 (1005 Metric) | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same |
| Brand | Walsin Technology Corporation | Walsin Technology Corporation | KEMET | TDK |
| Capacitance | 2200 pF | 2200 pF | 2200 pF | 2200 pF |
| Tolerance | +/-10% | +/-10% | +/-10% | +/-10% |
| Rated Voltage | 25 V | 50 V | 25 V | 25 V |
| Dielectric | X7R | X7R | X7R | X7R |
| Operating Temperature | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C |
| Approx. Unit Price (qty 1, as of 2026-09-14) | $0.01 | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- Same-family 50 V upgrade option (vs 0402B222K500CT)
- Cost leadership at volume (vs CGJ2B2X7R1E222K050BA)
- Identical specification to premium brands (vs C0402C222K3RACTU)
Design Notes
Use the standard 0402 land pattern of approximately 0.55 mm x 0.6 mm pads with 0.5 mm spacing. Place decoupling capacitors within 2 mm of the IC supply pin and connect to the ground plane with at least two vias to minimize loop inductance. The 0402 case is flex-crack sensitive: orient capacitors perpendicular to board bending axes and keep them at least 3 mm from mounting holes and board edges per best-practice IPC assembly guidance.
X7R capacitance drops with applied DC voltage. Estimated: at 12 V on a 25 V-rated X7R 0402, effective capacitance can fall 15-30% below nominal 2200 pF depending on the specific design. If the 2.2 nF value sets a filter corner or snubber frequency, verify the manufacturer DC-bias characteristic curve in the datasheet and size accordingly, or step up to a 50 V-rated variant (0402B222K500CT) for lower bias derating.
Do not use X7R for precision timing, sample-hold, or Integrator positions - its voltage coefficient, aging (typically 1-3% per decade-hour), and piezoelectric sensitivity make C0G/NP0 the correct choice there. Also avoid reflow profiles exceeding the manufacturer maximum temperature and ramp rates, which can cause termination cracking on small MLCCs. Verify reel quantity (typically 10,000 per reel for 0402) when planning SMT changeovers.
Compliance Information
Part is a modern SMD MLCC and is sold lead-free/reflow-compatible, but RoHS/REACH declarations should be confirmed from the official Walsin datasheet or certificate of conformance; distributor pages in the verified data do not state compliance status.