Murata Electronics NFM21CC221R1H3D

Product Summary NFM21CC221R1H3D Murata

The NFM21CC221R1H3D from Murata Electronics is a feedthrough capacitor designed for high-frequency noise suppression in general electronic applications. This multilayer ceramic device offers a nominal capacitance of 220 pF, with a voltage rating of 50V and a maximum rated current of 700 mA. Packaged in a compact 0805 (2012 metric) SMD configuration, the NFM21CC221R1H3D is an optimal choice for engineers seeking robust EMC performance within space-constrained designs. Fully compliant with RoHS and REACH directives, this part is suitable for automated assembly processes and supports sustainable manufacturing initiatives.

Principal Attributes and Design NFM21CC221R1H3D Murata

A primary characteristic of the NFM21CC221R1H3D is its three-terminal structure, a low ESL (equivalent series inductance) configuration that enhances its effectiveness in high-frequency applications. Manufactured as a chip multilayer ceramic capacitor under the EMIFIL series, the device incorporates Murata's advanced ceramic processing technologies to maximize dielectric reliability and stable performance across a wide range of operating conditions. The 0805 footprint allows dense placement and makes this capacitor appropriate for compact PCBs, supporting board layouts where effective grounding and minimal transmission line impedance are required.

The NFM21CC221R1H3D features a three-pad design, which promotes superior noise shunting to ground and minimizes parasitic inductance that can degrade filtering performance. This structure is particularly well-suited for suppressing EMI in circuits with critical data lines or power rails. The base tape and top tape of the standard 8 mm-wide paper reel packaging ensure safe transport and storage prior to PCB assembly.

Electrical Properties and Performance Characteristics NFM21CC221R1H3D Murata

Engineers specifying the NFM21CC221R1H3D should note its rated values: a capacitance of 220 pF (±20%), voltage rating of DC 50V, and a current handling capacity of up to 700 mA. It is tested under standard conditions (15–35°C, 25–85% RH, atmospheric pressure 86–106 kPa) to ensure reliable operation. Capacitance, like other high dielectric constant ceramics, is temperature and voltage dependent; thus, in applications requiring tight tolerances, designers must carefully evaluate and confirm device performance under intended system conditions.

It is critical to observe the maximum applied voltage (including any superimposed AC signals) and to ensure that self-heating of the capacitor does not exceed 20°C above ambient at 25°C. Over-voltage events, including surges and excessive pulse voltages, may degrade dielectric layers and result in device failure. The NFM21CC221R1H3D is noted for its aging characteristic, as capacitance values will diminish gradually over time; periodic verification in time-constant and filter circuits is recommended for systems with strict EMC requirements.

Physical and Environmental Factors NFM21CC221R1H3D Murata

The mechanical integrity of the NFM21CC221R1H3D is a direct function of its installation and operating environment. The capacitor is rated for unlimited moisture sensitivity (MSL 1), which facilitates ease of handling during automated assembly. However, appropriate storage at +5°C to +40°C and 20–70% RH is advised. Avoid any exposure to corrosive gases, direct sunlight, or moisture-condensing environments during storage and after installation to preserve solderability and electrical performance.

Resonance and mechanical shock must be carefully managed during PCB assembly, testing, and operation. The device should be mounted horizontally relative to board stress, especially near scores, perforations, or screw holes, to minimize the risk of cracking. Board separation, cropping, or mounting of additional components should be executed using controlled techniques (e.g., router-based separation) and jigs that minimize flexure at component locations.

Assembly, Soldering Methods, and PCB Integration NFM21CC221R1H3D Murata

For optimal reliability, the NFM21CC221R1H3D requires correctly managed mounting and soldering processes. Establish a mounting position that reduces flexural stress, particularly on densely populated or thin PCBs. Confirm the rated electrical characteristics before assembly, and avoid reusing previously mounted or dropped capacitors. Solder paste thickness should typically be between 100–150 µm to balance adhesive strength and thermal stress profile. Use only lead-free solder alloys such as Sn-3.0Ag-0.5Cu unless otherwise qualified.

During reflow and flow soldering, controlled pre-heating mitigates the impact of thermal shock, reducing the risk of cracks and solder voids. For rework, preheat both board and component before soldering iron application, and use wire and tip sizes suited for precision without imposing direct force or excessive temperature. Cleaning processes should avoid excessive ultrasonic energy; always verify process compatibility with actual assemblies.

The PCB land design is crucial for low impedance grounding and noise suppression. A sufficiently large ground plane, connected via through-holes (vias), is recommended to optimize EMI filtering. Adhesive selection, flux usage, and post-assembly washing must be managed to prevent corrosion, insufficient insulation, or degradation due to resin contraction mismatches.

Usage Instructions and Application Guidelines NFM21CC221R1H3D Murata

NFM21CC221R1H3D capacitors should be verified within the actual circuit environment to confirm electrical, thermal, and mechanical compatibility. In high-reliability systems—such as medical, aerospace, or safety-critical controls—engineers are encouraged to contact Murata or a qualified applications expert before implementing this device. Fail-safe features such as circuit fuses should be considered, as the device is not safety standard certified and could short if cracked or critically overstressed.

Environmental atmosphere and piezoelectric phenomena must be evaluated if the capacitor is used in AC or pulse circuits, as vibration or shock may induce audible noise or performance shifts. Handling, assembly, and system operating protocols should ensure the device and assembled board are not subjected to excessive shocks, bending, or insertion forces during manufacturing or service.

Possible Alternative or Substitute Models NFM21CC221R1H3D Murata

For engineers considering alternative or backup sourcing, Murata offers several related series and models within the EMIFIL chip multilayer ceramic lineup, notably including the NFM21CC and compatible variants in other value ranges or package sizes (for example, NFM15CC, NFM18CC/PC, and NFM31KC/PC). These alternatives maintain similar construction and performance characteristics, allowing ease of substitution in designs where footprint and electrical specifications align. It is imperative to cross-check the capacitance, voltage, current, and package before integrating an equivalent model to ensure sustained EMC performance and mechanical reliability.

Conclusion

: NFM21CC221R1H3D Murata

The Murata NFM21CC221R1H3D feedthrough capacitor exemplifies robust EMI filtering performance for general electronic applications, combining compact size, high reliability, and versatile mounting options. Engineers focused on precision noise suppression and PCB integration will find this part a strong candidate for a wide spectrum of commercial design needs. Successful implementation relies on informed handling of its electrical characteristics, mechanical requirements, and process integration, as outlined in this detailed overview. For projects demanding long-term reliability and high EMC performance, the NFM21CC221R1H3D remains a compelling solution within Murata’s industry-leading ceramic capacitor portfolio.