C0603C104K5RACTU - 0.1uF 50V X7R 0603 MLCC | KEMET
MPN: C0603C104K5RACTU β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.1 | $0.10 |
| 10 | $0.07 | $0.70 |
| 100 | $0.039 | $3.90 |
| 500 | $0.025 | $12.50 |
| 1,000 | $0.017 | $17.00 |
| 2,500 | $0.013 | $32.50 |
C0603C104K5RACTU Overview
A multilayer ceramic capacitor is a passive component built by stacking alternate layers of ceramic dielectric and metal electrodes, then sintering the structure into a monolithic chip. Within the passive component hierarchy, MLCCs belong to the capacitor family alongside film, tantalum, and aluminum electrolytic types, and are the dominant decoupling and bypass technology in modern surface-mount electronics due to their small size, low ESR, and non-polarized operation.
Key features of the C0603C104K5RACTU include the X7R Class II dielectric, which maintains capacitance within plus/minus 15% across the -55C to +125C temperature range, a 50 V DC working voltage suitable for most logic rails, and matte-tin-plated nickel-barrier terminations that provide excellent solderability for reflow and wave soldering processes.
The X7R dielectric is considered temperature stable by KEMET, with a maximum operating temperature of 125C. Like all Class II dielectrics, capacitance varies with applied DC bias and aging; engineers should consult the manufacturer datasheet DC bias curves when the effective capacitance under bias is critical to the design. The non-polarized construction means there are no orientation constraints during PCB assembly.
Typical applications, per the manufacturer datasheet, include decoupling, bypass, filtering, and transient voltage suppression. The 0.1 uF/50 V combination is the classic logic-IC decoupling value, placed close to VCC pins of microcontrollers, FPGAs, and digital ICs, and is equally common in analog signal-chain filtering.
Design consideration: for 5 V and 3.3 V rails, the 50 V rating provides generous margin, but at the maximum 125C ambient the effective capacitance can drop; verify derating requirements early.
This page synthesizes distributor pricing, drop-in alternates, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for C0603C104K5RACTU 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:
C0603X104K5RACTU
β Drop-Inπ Reference alternative (not in catalog)
C0603C104K5RAC7867
β Drop-Inπ Reference alternative (not in catalog)
06035C104K4T2A
β Drop-Inπ Reference alternative (not in catalog)
C0603C104K3RACTU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
C0603C104J5RACTU
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
C0603C104K5RACTU Maximum Ratings & Electrical Characteristics
| Capacitance | 0.1 uF (100 nF) |
| Tolerance | +/-10% |
| Rated Voltage (DC) | 50 V |
| Dielectric | X7R (Class II) |
| Temperature Coefficient | X7R (+/-15% over -55C to +125C) |
| Operating Temperature Range | -55C to +125C |
| Package / Case | 0603 (1608 Metric) |
| Mounting Type | Surface Mount (SMD/SMT) |
| Series | C Series (Commercial) |
| Termination Finish | Matte tin over nickel barrier |
| Applications | Decoupling, bypass, filtering, transient voltage suppression |
| Polarity | Non-polarized |
| Packaging Option (ACTU suffix) | Tape and Reel / Cut Tape per distributor option |
| RoHS Status | Compliant |
C0603C104K5RACTU Pin Configuration
| Pin 1 | Terminal 1 β Non-polarized electrode - either terminal may connect to the higher potential |
| Pin 2 | Terminal 2 β Non-polarized electrode - either terminal may connect to the lower potential |
Typical Applications
C0603C104K5RACTU is suitable for 6 applications: Logic IC Decoupling, Bypass Filtering on Power Rails, Consumer Electronics and IoT Devices, Industrial Control and Automation, Audio Signal Path Filtering, Automotive Electronics (Automotive Variant Path).
Logic IC Decoupling
The C0603C104K5RACTU is the canonical 0.1 uF decoupling capacitor for microcontrollers, FPGAs, and digital ICs. Its X7R dielectric and 0603 case give low ESR and low parasitic inductance, effectively shunting high-frequency switching transients from supply rails to ground. Placed within a few millimeters of each VCC pin with short traces and nearby ground vias, it supplies instantaneous charge during clock edges, reducing rail bounce and EMI. The 50 V rating provides wide margin on 5 V, 3.3 V, and 1.8 V rails, so one value can be standardized across an entire BOM for all logic supply decoupling, simplifying procurement and assembly.
Recommended
Bypass Filtering on Power Rails
On mixed-signal boards, the C0603C104K5RACTU serves as a bypass element alongside bulk capacitance to suppress residual ripple and high-frequency noise on analog supply rails. Its temperature-stable X7R dielectric holds capacitance within plus/minus 15% from -55C to +125C, ensuring consistent filtering behavior across operating conditions. Combined with an upstream LDO or DC-DC converter, the 0.1 uF value attenuates broadband noise at the load point. Because the part is non-polarized, it can be placed on any rail without orientation concerns, and the 50 V rating allows use on industrial 24 V-derived supplies with appropriate derating margin.
Recommended
Consumer Electronics and IoT Devices
The compact 0603 (1608 metric) footprint and low unit cost of the C0603C104K5RACTU make it ideal for high-density consumer products such as smart-home sensors, wearables, and wireless IoT modules where board area is scarce. One 0603 cap occupies roughly 1.6 x 0.8 mm, enabling dense placement around Bluetooth, Wi-Fi, and sensor ICs. The commercial C-Series grade is cost-optimized for non-automotive volume production, and RoHS-compliant matte-tin terminations are compatible with standard lead-free reflow assembly. Standardizing on this value across decoupling positions reduces feeder count on SMT lines, lowering assembly cost in mass production.
Recommended
Industrial Control and Automation
In industrial controllers, PLC I/O cards, and motor-drive control boards, the C0603C104K5RACTU provides transient voltage suppression support and decoupling in electrically noisy environments. Its X7R dielectric tolerates ambient temperatures up to 125C, covering control cabinets that run warm, and the 50 V rating withstands supply transients common on industrial 24 V rails. Per the KEMET datasheet, transient voltage suppression is a listed application for this family. For highest-reliability automotive-adjacent industrial deployments, the AEC-Q200 qualified C0603C104K5RAC7867 variant offers the same footprint and ratings with automotive-grade screening.
Recommended
Audio Signal Path Filtering
In audio preamps, DAC output stages, and headphone amplifier circuits, the C0603C104K5RACTU filters supply noise that would otherwise couple into the audio path. Its low ESR contributes minimal noise injection compared with electrolytic alternatives, and the X7R dielectric is suitable for supply-rail filtering positions. For critical low-distortion analog signal-path coupling where voltage-coefficient nonlinearity matters, designers often pair this decoupling part with film capacitors at the signal nodes while relying on the compact MLCC for rail cleaning. The 0603 size allows placement directly at each op-amp supply pin in dense audio PCB layouts.
Recommended
Automotive Electronics (Automotive Variant Path)
For automotive ECUs, body-control modules, and infotainment boards, KEMET offers the C0603C104K5RAC7867, an AEC-Q200 qualified drop-in variant of this part with identical 0.1 uF, 50 V, X7R, plus/minus 10% specifications in the same 0603 case. Design teams can prototype with the commercial C0603C104K5RACTU and transition to the automotive-qualified suffix for production without PCB changes. The wide -55C to +125C X7R operating range of the family supports under-hood-adjacent and passenger-compartment temperature profiles, while the small footprint suits modern ECU designs with high component density and automated assembly.
Recommended
Recommended Products Summary
Engineering reference data for C0603C104K5RACTU β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | C0603X104K5RACTU | C0603C104K5RAC7867 | 06035C104K4T2A | C0603C104K3RACTU |
|---|---|---|---|---|---|
| Package | 0603 (1608 Metric) | 0603 (1608 Metric) - same | 0603 (1608 Metric) - same | 0603 (1608 Metric) - same | 0603 (1608 Metric) - same |
| Brand | KEMET | KEMET | KEMET | Kyocera AVX | KEMET |
| Capacitance | 0.1 uF | 0.1 uF | 0.1 uF | 0.1 uF | 0.1 uF |
| Tolerance | +/-10% | +/-10% | +/-10% | +/-10% (K4 code) | +/-10% |
| Dielectric / Temp Range | X7R, -55C to +125C | X7R, -55C to +125C | X7R, -55C to +125C | X7R, -55C to +125C | X7R, -55C to +125C |
| Termination | Standard nickel-barrier / matte tin | FT-CAP flexible termination | Standard (automotive screened) | Standard nickel-barrier / tin | Standard nickel-barrier / matte tin |
| Qualification Grade | Commercial (C Series) | Commercial with flex termination | AEC-Q200 automotive | Commercial | Commercial |
Key Differentiators
- 50 V rating on a 0603 body (vs C0603C104K3RACTU)
- Temperature-stable X7R dielectric (vs 06035C104K4T2A (Kyocera AVX))
- Cost-optimized commercial grade with automotive upgrade path (vs C0603C104K5RAC7867)
Design Notes
For decoupling duty, place the C0603C104K5RACTU as close as possible to the IC supply pin, with the ground pad tied directly to a via into the ground plane. Keep the total loop length short; even the small 0603 ESL becomes significant if traces add nanohenries of inductance. Standard 0603 land pattern per the manufacturer datasheet supports lead-free reflow with matte-tin terminations; no wave-solder-specific pad shaping is needed.
X7R is a Class II dielectric: capacitance drops with applied DC bias and ages over time. KEMET's datasheet explicitly cautions that responses vary with manufacturing tolerances of capacitance, ESR, and ESL. Do not use this part where a precise capacitance value is required (timing, precision filters); use C0G/NP0 types instead. Also avoid mechanical board flex near the capacitor - standard rigid terminations are susceptible to flex cracking; specify the C0603X104K5RACTU flexible-termination version for flex-stressed assemblies.
Estimated: for a 5 V rail, the 50 V rated part operates at 10% of its rating, well inside common 50% derating practice, ensuring long-term reliability. For 24 V industrial rails the part sits at 48% of rating, still acceptable, but verify DC bias curves since effective capacitance at 24 V will be notably lower than nominal 0.1 uF. At 125C ambient, expect further capacitance reduction within the X7R +/-15% specification envelope.
Compliance Information
RoHS-compliant per distributor listings; matte-tin lead-free terminations. Not AEC-Q200 qualified - use C0603C104K5RAC7867 for automotive.
