0402B104K500CT - 0.1uF 50V X7R 0402 MLCC | Walsin
MPN: 0402B104K500CT β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.0052 | $0.01 |
| 10 | $0.0048 | $0.05 |
| 100 | $0.0035 | $0.35 |
| 500 | $0.0025 | $1.25 |
| 1,000 | $0.002 | $2.00 |
Drop-in alternatives for 0402B104K500CT 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:
GRM155R71H104KE14D
β Drop-Inπ Reference alternative (not in catalog)
CL05B104KO5NNNC
β Drop-Inπ Reference alternative (not in catalog)
C1005X7R1H104K050BB
β Drop-Inπ Reference alternative (not in catalog)
CC0402KRX7R9BB104
β Drop-Inπ Reference alternative (not in catalog)
C0402C104K5RACTU
β Drop-Inπ Reference alternative (not in catalog)
0402B104K500CT-C
β Drop-Inπ Reference alternative (not in catalog)
0402B104K500CT Maximum Ratings & Electrical Characteristics
| Capacitance | 0.1 uF (100 nF) |
| Tolerance | +/-10% (K) |
| Rated Voltage | 50 V DC |
| Dielectric | X7R (Class 2) |
| Temperature Range | -55C to +125C |
| Temperature Coefficient | +/-15% over -55C to +125C |
| Package / Case Size | 0402 (1005 Metric) |
| Mounting Type | Surface Mount, MLCC (SMD/SMT) |
| Type | Multilayer Ceramic Capacitor (MLCC) |
| Operating Category | General Purpose Series (10 V to 100 V) |
| Terminations | 2 (end terminations, non-polarized) |
| Packaging | Tape & Reel (CT suffix, tape carrier) |
0402B104K500CT 0402 (1005 metric) Pin Configuration Guide
Complete pinout information for 0402B104K500CT (0402 (1005 metric) 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 0402B104K500CT.
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
0402B104K500CT is suitable for 6 applications: Power Rail Decoupling, Consumer Electronics and IoT Devices, Automotive Body and Infotainment Electronics, Industrial Control and PLC Boards, Signal Coupling and DC Blocking, High-Density Digital Boards and Modules.
Power Rail Decoupling
The 0402B104K500CT is a classic choice for local decoupling of microcontroller, FPGA, and logic IC power pins. Its 0.1 uF capacitance in a 0402 package places a low-inductance charge reservoir within millimeters of the decoupled pin, suppressing high-frequency supply transients that larger bulk capacitors cannot reach due to loop inductance. The 50 V rating covers 3.3 V, 5 V, 12 V, and 24 V industrial rails with wide margin. Place the capacitor directly adjacent to the power pin with short, wide traces to the ground plane to minimize the power loop area. Designers should budget for X7R DC-bias derating when the rail voltage is a significant fraction of the 50 V rating.
Recommended
Consumer Electronics and IoT Devices
Wearables, smart-home nodes, and battery-powered IoT products benefit from the 0402B104K500CT's small 1.0 x 0.5 mm footprint, which conserves board area in dense module layouts. The X7R dielectric keeps capacitance within +/-15% from -55C to +125C, covering both outdoor temperature extremes and heat buildup in compact enclosures. With LCSC reporting roughly 700,000 units in stock and per-unit pricing around $0.005 at low volumes, it suits high-volume consumer BOMs where cost per placement matters. For RF modules, pair one 0402 0.1 uF with a 1 uF X5R bulk capacitor per supply domain to span the impedance-frequency spectrum effectively.
Recommended
Automotive Body and Infotainment Electronics
The X7R dielectric's -55C to +125C operating range aligns with many automotive cabin and under-dash environments, making the 0402B104K500CT suitable for non-critical-load automotive subsystems such as infotainment boards, body-control modules, and sensor interfaces in non-safety paths. The 50 V rating provides headroom against load-dump-adjacent transients after upstream protection. Designers targeting safety-relevant or AEC-Q200-mandated positions should confirm the qualified part status with Walsin and consider the automotive-grade variant of the same dielectric. Decouple each supply pin with 0.1 uF and add bulk capacitance at the connector to handle inductive harness effects.
Recommended
Industrial Control and PLC Boards
Industrial PLC I/O cards, motor-drive control boards, and factory automation sensors commonly run 24 V logic supplies, and the 0402B104K500CT's 50 V rating gives a comfortable 2x margin on a 24 V rail - satisfying the widely used 50-80% voltage-derating practice for MLCC reliability. X7R stability across -55C to +125C suits unconditioned factory floors. Use one 0402 0.1 uF per digital IC supply pin plus 4.7-10 uF bulk per board region; on the 24 V input, note that DC-bias derating reduces effective capacitance, so oversize nominal capacitance accordingly. Conformal coating compatibility should be checked for humid environments.
Recommended
Signal Coupling and DC Blocking
In audio and general analog signal chains, the 0402B104K500CT serves as a series DC-blocking coupling capacitor between stages. Its 0.1 uF value with a typical 10 kOhm load impedance forms a high-pass corner near 160 Hz; for full-bandwidth audio coupling, use it with higher-impedance nodes or select a larger nominal value. X7R exhibits some piezoelectric (microphonic) response, so for low-level microphone or precision gain stages, C0G/NP0 coupling capacitors are preferred. For digital and line-level signals, the part's small 0402 footprint keeps series loops short, preserving signal integrity and fitting tight routing channels on dense boards.
Recommended
High-Density Digital Boards and Modules
Smartphone-class and SODIMM-style boards place hundreds of 0402 0.1 uF decoupling capacitors, and the 0402B104K500CT is designed for exactly this high-capacitance-in-small-case role that Walsin highlights for the series. At roughly $0.002 or less per piece at 1000+ quantities (as of 2026-09-14), BOM cost per placement is negligible while providing distributed low-inductance decoupling across DDR, PMIC, and SoC supply domains. Best practice is a mix of capacitance values (0.1 uF X7R plus 10-22 uF X5R bulk) with one 0402 0.1 uF per power pin. Panelization and pick-and-place throughput favor the tape-and-reel CT packaging.
Recommended
Recommended Products Summary
Engineering reference data for 0402B104K500CT β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | GRM155R71H104KE14D | CL05B104KO5NNNC | C1005X7R1H104K050BB | CC0402KRX7R9BB104 | C0402C104K5RACTU |
|---|---|---|---|---|---|---|
| Package | 0402 (1005 Metric) | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same |
| Brand | Walsin | Murata Manufacturing | Samsung Electro-Mechanics | TDK | YAGEO | KEMET |
| Capacitance | 0.1 uF | 0.1 uF | 0.1 uF | 0.1 uF | 0.1 uF | 0.1 uF |
| Tolerance | +/-10% | +/-10% (K) | +/-10% (K) | +/-10% (K) | +/-10% (K) | +/-10% (K) |
| Rated Voltage | 50 V | 50 V | 50 V | 50 V | 50 V | 50 V |
| Dielectric | X7R | X7R | X7R | X7R | X7R | X7R |
| Operating Temperature | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C | -55C to +125C |
| Approx. Unit Price (qty 1) | $0.0052 (as of 2026-09-14) | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| DC-Bias Derating Curve | [DATA_NEEDED] | Published by Murata SimSurfing | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
Key Differentiators
- High volumetric capacitance density (vs C0402C104K5RACTU)
- Cost-effective commodity sourcing (vs GRM155R71H104KE14D)
- Identical footprint to all major-brand equivalents (vs CL05B104KO5NNNC)
Design Notes
Place the 0402B104K500CT as close as possible to the decoupled IC power pin, with the trace to the pin and the via to the ground plane kept short and wide. The effective decoupling bandwidth is dominated by loop inductance: a 0402 with an optimized via-in-pad or short via pair can achieve noticeably lower parasitic inductance than the same dielectric in an 0805 placed farther away. For BGA fanout regions, place one 0402 per power ball group and use a local ground via within 1 mm of the capacitor land pattern.
Budget effective capacitance, not nominal capacitance. The X7R dielectric loses capacitance under DC bias and at low temperature; at bias levels approaching the 50 V rating, effective capacitance can fall far below the nominal 0.1 uF (Estimated: consult the Walsin datasheet DC-bias curve for exact values - do not assume nominal capacitance holds). On 3.3 V and 5 V rails the loss is modest, but on 24 V industrial rails size the nominal value up or add parallel devices to meet the decoupling impedance target at the switching frequency of interest.
Avoid reflow-profile and board-flex stress on 0402 MLCCs: their small body cracks more easily under excessive flexure or hot-bar operations, and X7R parts are more sensitive than C0G. Specify a compatible solder paste and follow IPC-recommended land patterns; avoid placing 0402 ceramics within 3-5 mm of board edge, screw bosses, or connector insertion zones where board deflection is greatest. Cracked X7R capacitors often show as intermittent shorts that are hard to diagnose in the field.
Compliance Information
Compliance status not stated in the provided web data; modern Walsin commodity MLCCs are typically RoHS-compliant but this must be confirmed from the manufacturer datasheet or product page before design-in.