0402B222K250CT - 2200pF 25V X7R 0402 MLCC | Walsin
料号： 0402B222K250CT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 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 |
0402B222K250CT 概述
An MLCC is a passive capacitor built from alternating layers of ceramic dielectric and metal electrodes, terminated at opposite ends for surface mounting. Within the passive component hierarchy, it belongs to the ceramic capacitor family, itself a subset of fixed capacitors. X7R is a temperature-stable Class 2 dielectric defined as maintaining capacitance within +/-15% over the -55C to +125C temperature range, making it the workhorse dielectric for decoupling, bypass, and filtering where moderate stability is sufficient.
Key features of the 0402B222K250CT include the X7R dielectric for temperature stability up to 125C, a 25 V DC voltage rating suitable for 3.3 V, 5 V, and 12 V logic rails with margin, the compact 0402 (1.0 mm x 0.5 mm) footprint that supports high-density PCB layouts, and +/-10% K tolerance for predictable circuit behavior. The nickel-barrier termination is compatible with reflow and wave soldering profiles per standard SMT assembly processes.
The multilayer construction stacks thin dielectric layers with sintered nickel and copper or silver terminations, yielding high capacitance per unit volume and low equivalent series inductance compared with through-hole alternatives. X7R capacitance varies with applied DC bias, so designers should derate expected effective capacitance at operating voltage in timing or filter circuits.
Typical applications include power-supply decoupling for microcontrollers and FPGAs, input and output filtering on DC-DC converters, analog signal coupling and bypass, and general-purpose RC networks in consumer, industrial, and automotive-adjacent electronics. The 2.2 nF value is common in snubber and EMI filter positions.
Design consideration: X7R components exhibit piezoelectric (acoustic) effects and DC-bias capacitance loss; for precision timing, prefer C0G dielectric. Keep traces short to minimize parasitic inductance at decoupling sites.
This page synthesizes distributor pricing, cross-referenced drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： 0402B222K250CT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
0402B222K500CT
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
C0402C222K3RACTU
✅ 直接替换📋 参考替代料（不在目录中）
CGJ2B2X7R1E222K050BA
✅ 直接替换📋 参考替代料（不在目录中）
0402B222K250CT 最大额定值与电气特性
| Capacitance | 2200 pF (2.2 nF) |
| Tolerance | +/-10% |
| Rated Voltage (DC) | 25 V |
| Dielectric | X7R (Class 2) |
| Temperature Characteristics | +/-15% over -55C to +125C |
| 封装 | 0402 (1005 Metric) |
| Package Dimensions | 1.0 mm x 0.5 mm |
| 安装类型 | Surface Mount (SMD/SMT) |
| 工作温度 | -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 引脚配置指南
0402B222K250CT（1.0 mm x 0.5 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： 0402B222K250CT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
0402B222K250CT 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： 0402B222K250CT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Same-family 50 V upgrade option （对比 0402B222K500CT)
- Cost leadership at volume （对比 CGJ2B2X7R1E222K050BA)
- Identical specification to premium brands （对比 C0402C222K3RACTU)
设计说明
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.
合规信息
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.
