0402X105K100CT - 1uF 10V X5R 0402 MLCC | Walsin | Decoupling
Référence : 0402X105K100CT ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $0.01 | $0,01 |
| 10 | $0.009 | $0,09 |
| 100 | $0.0082 | $0,82 |
| 500 | $0.005 | $2,50 |
| 1 000 | $0.004 | $4,00 |
0402X105K100CT Présentation
An MLCC is a passive electronic component built from alternating layers of ceramic dielectric material and metal electrodes, fired together into a monolithic block with termination electrodes on both ends. As part of the capacitor family within the broader passive components hierarchy, MLCCs store charge, filter noise, and stabilize supply rails, and they are the most widely deployed passive device on modern PCBs due to their small size, low ESR, and lack of polarity.
Key features of the 0402X105K100CT include a high volumetric efficiency of 1 uF in the 0402 (1005 metric) outline, the X5R dielectric specification (-55C to +85C operating range, +/-15% capacitance change over temperature), and a tight +/-10% capacitance tolerance (K code). The CT suffix denotes tape-and-reel packaging suitable for automated pick-and-place assembly.
The X5R ferroelectric dielectric provides substantially higher permittivity than Class 1 dielectrics such as C0G, enabling large capacitance in a tiny footprint, at the cost of voltage-dependent capacitance (DC bias derating) and moderate temperature stability. Designers must account for effective capacitance derating under DC bias when relying on this part for decoupling.
Typical applications include general-purpose power-supply decoupling at microcontroller and FPGA supply pins, input and output filtering for DC-DC converter modules, and bulk capacitive buffering in portable, IoT, and consumer electronics where board area is at a premium.
A key design consideration is DC bias derating: X5R devices in small case sizes can lose 30-50% of rated capacitance at a significant fraction of rated voltage, so verify effective capacitance under the actual operating voltage rather than nominal value.
This page synthesizes distributor pricing, cross-referenced drop-in alternatives from multiple manufacturers, and practical design notes not found in the manufacturer datasheet alone.
Alternatives de remplacement direct pour 0402X105K100CT — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec 0402X105K100CT (même facteur de forme et même empreinte) — différant par Dielectric, Mounting Type, Rated Voltage (DC), Termination Style.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
0402S105K100CT
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
0402ZD105KAT2A
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
CC0402KRX5R6BB105
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
0402X105K100CT Valeurs maximales et caractéristiques électriques
| Capacitance | 1 uF |
| Capacitance Tolerance | +/-10% (K) |
| Rated Voltage (DC) | 10 V |
| Dielectric | X5R (Class 2) |
| Plage de température de fonctionnement | -55C to +85C |
| Temperature Coefficient | +/-15% over -55C to +85C |
| Package / Case Size | 0402 (1005 Metric) |
| Type de montage | Surface Mount (SMD/SMT) |
| Technology | Multilayer Ceramic Capacitor (MLCC) |
| Termination Style | Solder-plated terminations, non-polar |
| Packaging | Tape & Reel (CT suffix) |
| Application Class | General purpose decoupling and filtering |
Guide de configuration des broches du 0402X105K100CT 0402 (1005 metric)
Configuration des broches du 0402X105K100CT (boîtier 0402 (1005 metric)). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour 0402X105K100CT.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
0402X105K100CT convient pour 6 applications: Microcontroller Supply Decoupling, DC-DC Converter Input/Output Filtering, IoT and Wearable Device Power Rails, Consumer Electronics and Mobile Devices, Industrial Control and Automation Boards, RF Module and Wireless Communication Boards.
Microcontroller Supply Decoupling
The 0402X105K100CT is a standard choice for decoupling microcontroller supply pins such as STM32, STM8, and ARM Cortex-M class MCUs. Its 1 uF capacitance and small 0402 footprint place its self-resonance in the tens-to-hundreds of MHz region, giving low impedance exactly where logic switching transients demand charge. Placed within 2-3 mm of each VDD pin with short, wide traces, it suppresses ground bounce and supply ripple that would otherwise cause clock jitter or brownout resets. Because X5R capacitance derates under DC bias, at 3.3 V rails the effective capacitance is somewhat below nominal 1 uF but remains ample for per-pin decoupling when paired with local bulk capacitance.
Recommandé
DC-DC Converter Input/Output Filtering
In buck and boost converter designs, the 0402X105K100CT serves as input decoupling for switching regulators and as output capacitance for low-current rails. For converter inputs, its 1 uF value and low ESR ceramic construction absorb the pulsed input current, reducing conducted EMI back onto the source rail; place it directly across the converter VIN and PGND pins. On outputs of small converters feeding 1.8 V to 5 V rails, the +/-10% X5R tolerance keeps output ripple predictable, though designers must budget for DC bias derating at higher rail voltages. For switching nodes up to the 10 V rating, this part provides a compact, reflow-compatible solution in dense power layouts.
Recommandé
IoT and Wearable Device Power Rails
Battery-powered IoT nodes, smart sensors, and wearables demand maximum capacitance in minimum board area, which is exactly the 0402X105K100CT's value proposition: 1 uF in a 1.0 x 0.5 mm footprint. It decouples radios such as BLE and Wi-Fi modules whose transmit bursts draw sharp current spikes, and it buffers sensor supply rails against radio-induced droop. The X5R dielectric's -55C to +85C range covers typical indoor and wearable environments, though enclosed wearable designs exceeding +85C ambient should move to the X6S variant 0402S105K100CT. Its non-polar ceramic construction simplifies assembly and eliminates electrolytic lifetime concerns in long-deployment devices.
Recommandé
Consumer Electronics and Mobile Devices
Smartphones, tablets, TWS earbuds, and set-top boxes place hundreds of MLCCs per board, and the 0402X105K100CT is a workhorse for their miscellaneous power and filter roles: baseband and application processor I/O rails, camera module supplies, audio codec AVDD decoupling, and display driver filtering. The tape-and-reel CT packaging supports high-speed pick-and-place at consumer volumes, and the commodity price point (around $0.004-0.01 as of 2026-09-14) suits cost-driven BOMs. Its +/-10% K tolerance is the standard grade accepted for consumer decoupling, while the 0402 size keeps routing channels open under dense BGA fans-outs and fine-pitch connector fields.
Recommandé
Industrial Control and Automation Boards
Industrial PLC I/O modules, motor-control interface boards, and factory sensor nodes use the 0402X105K100CT to decouple isolated transceivers, gate-driver logic supplies, and 3.3 V/5 V micro rails in environments with electrical noise from motors and switching loads. Its 10 V rating comfortably covers standard 5 V and 3.3 V industrial logic rails with margin, and ceramic construction withstands vibration better than through-hole electrolytes. In noisy industrial settings, pairing this 1 uF with a ferrite bead or a small series resistor forms a pi-filter that attenuates conducted noise before it reaches sensitive controller pins, improving immunity on boards that must operate reliably for years in the field.
Recommandé
RF Module and Wireless Communication Boards
RF modules, GPS receivers, and short-range wireless boards require low-impedance, low-parasitic decoupling at PA supply pins and VCO/PLL rails, where the 0402X105K100CT's tiny case minimizes series inductance and keeps the impedance dip at useful frequencies. Its 1 uF value complements the standard 100 pF/10 nF/1 uF decoupling ladder that places each capacitor's self-resonance over a different band. Designers should verify DC-bias-derated capacitance at the RF rail voltage and place the part with solid via-stitched ground connections so the low ESR advantage is not lost to trace inductance. The X5R dielectric is acceptable for supply decoupling, though C0G remains preferred inside tunable matching networks.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour 0402X105K100CT — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | 0402S105K100CT | 0402ZD105KAT2A | CC0402KRX5R6BB105 |
|---|---|---|---|---|
| Package | 0402 (1005 Metric) | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same | 0402 (1005 Metric) - same |
| Brand | Walsin | Walsin | Yageo | Yageo |
| Capacitance | 1 uF | 1 uF | 1 uF | 1 uF |
| Rated Voltage | 10 V | 10 V | 10 V (X5R, 6.3V code per Yageo nomenclature - verify datasheet) | 6.3 V (BB105 = X5R 6.3V; verify against requirement) |
| Tolerance | +/-10% | +/-10% | +/-10% | +/-10% |
| Dielectric | X5R | X6S | X5R | X5R |
| Temperature Range | -55C to +85C (X5R) | -55C to +105C (X6S) | -55C to +85C | -55C to +85C |
Principaux différenciateurs
- High capacitance density for the footprint (vs 0402B104K500CT)
- Extended temperature headroom option within the same brand (vs 0402S105K100CT)
- Higher voltage rating than the Yageo BB-series equivalent code (vs CC0402KRX5R6BB105)
Notes de conception
DC bias derating is the number one pitfall with X5R MLCCs in 0402 case size. The nominal 1 uF capacitance of the 0402X105K100CT decreases as DC voltage approaches the 10 V rating - small-case X5R parts commonly lose 30-50% of nominal capacitance at a significant fraction of rated voltage (consult the manufacturer's DC bias characteristic curves in the Walsin datasheet for exact figures). Size your decoupling using the derated effective capacitance at your rail voltage, not the 1 uF nominal value, and add a parallel 0.1 uF part for high-frequency coverage.
Layout dominates MLCC performance. Place the 0402X105K100CT within 2-3 mm of the IC supply pin it decouples, with a solid, short ground connection - ideally an immediate via to the ground plane at each pad. Long thin traces add series inductance (roughly 1 nH per mm), which raises impedance exactly at the switching frequencies of concern. Avoid sharing one capacitor between multiple distant pins; one 1 uF per supply pin group with a nearby bulk capacitor (e.g., 4.7 uF 0402X475M6R3CT) gives the flattest supply impedance profile.
X5R capacitance also derates with temperature: combined with the +/-15% X5R temperature coefficient and the +/-10% initial tolerance, worst-case capacitance can deviate roughly +/-25% from nominal near the -55C to +85C range limits. For designs operating continuously above +70C ambient or below -40C, budget the extra margin or move to the same-footprint X6S variant (0402S105K100CT) which holds its capacitance to a higher upper temperature. Ceramics themselves handle heat well, but reflow and board flex cracking are the physical risks for 0402 parts - follow IPC handling guidelines for small MLCCs.
Informations de conformité
Compliance declarations not included in the provided web data. DigiKey and Mouser listings for 0402X105K100CT publish per-part RoHS/REACH status - consult those listings for authoritative values.
