CC0402BRNPO9BN1R8

The CC0402BRNPO9BN1R8 is a 1.8pF C0G (NP0) dielectric multilayer ceramic capacitor from Yageo’s CC series, designed specifically for temperature-compensating and high-frequency applications where capacitance stability is of paramount importance.

Unlike Class 2 dielectrics such as X5R and X7R which offer higher capacitance per volume but suffer from capacitance variation with temperature, voltage, and time, C0G (also known as NP0, for Negative-Positive Zero) is a Class 1 dielectric with near-zero temperature coefficient of capacitance. The CC0402BRNPO9BN1R8 exhibits a temperature coefficient of 0 ±30ppm/°C, meaning its capacitance changes by less than 0.3% over the full -55°C to +125°C operating temperature range — exceptional stability compared to X7R’s ±15% variation.

The tight ±0.1pF tolerance (tolerance code B) makes this 1.8pF capacitor particularly well-suited for precision applications such as oscillator loading, RF matching networks, and filter circuits where even small capacitance variations can significantly impact circuit performance. With a total tolerance of just ±0.1pF on a 1.8pF nominal value, the absolute capacitance accuracy is approximately ±5.6% — far better than the standard ±5% (code J) or ±10% (code K) tolerances common with higher-value MLCCs.

Another key advantage of C0G dielectric is that it exhibits no capacitance aging effect. While Class 2 dielectrics lose capacitance over time (typically a few percent per decade), C0G capacitors maintain their capacitance value indefinitely, eliminating the need to account for aging drift in precision designs. The dissipation factor is extremely low (typically less than 0.1%), resulting in a very high Q factor that is essential for resonant and RF circuits.

Packaged in a compact 0402 (1005 Metric) case with wraparound nickel-barrier and tin-plated terminations, the CC0402BRNPO9BN1R8 is supplied on 7-inch paper tape reels (code R = paper tape) containing 10,000 pieces per reel. Fully RoHS compliant and MSL Level 1 classified, this capacitor is ready for high-volume automated SMT assembly in consumer, industrial, and telecommunications electronics.

A C0G (NP0) multilayer ceramic capacitor stores electrical energy through the electrostatic field developed between interleaved conductive electrodes separated by a temperature-stable ceramic dielectric material.

In the CC0402BRNPO9BN1R8, the capacitor is constructed from multiple thin layers of C0G dielectric ceramic interleaved with internal metal electrodes. C0G dielectric — also called NP0 (Negative-Positive-Zero) — is a Class 1 ceramic formulation typically based on titanium dioxide (TiO2) or calcium zirconate with carefully controlled dopants that produce a near-zero temperature coefficient of capacitance. Unlike the barium titanate-based ferroelectric ceramics used in Class 2 (X5R, X7R) capacitors, C0G materials are paraelectric, meaning they do not exhibit the ferroelectric domain structure that causes high capacitance but also causes strong temperature dependence, voltage dependence, and aging.

The internal electrodes — typically made of nickel or a copper-based alloy for cost-effective base metal electrode (BME) technology, or silver-palladium for precious metal electrode (PME) types — are printed onto green (unfired) ceramic sheets using a precise screen-printing process. Multiple printed sheets are stacked and laminated together under pressure, creating a monolithic structure with alternating electrode layers. The stacked laminate is then cut into individual chips of the 0402 size (1.0mm × 0.5mm).

The green chips are then co-fired at high temperature (typically 1000°C to 1300°C, depending on the electrode material system) in a carefully controlled atmosphere. During firing, the ceramic layers densify and sinter together, forming a single solid monolithic block, while the electrode layers remain as continuous conductive paths within the ceramic. Alternating internal electrodes are connected to opposite ends of the chip, effectively creating many individual capacitors connected in parallel.

After firing, end terminations are applied to connect the internal electrodes to the external circuit. The wraparound termination structure typically consists of a copper or silver base layer applied to the chip ends, followed by a nickel barrier layer (to prevent solder leaching during assembly) and an outer tin plating for solderability.

When a voltage is applied across the capacitor terminals, an electric field develops across each dielectric layer, polarizing the ceramic material and storing electrical charge. In C0G dielectrics, the polarization mechanism is primarily ionic displacement — the slight shifting of ions within the crystal lattice in response to the applied field. Since this is a linear, reversible process with no ferroelectric domain switching, the capacitance is highly stable over temperature, voltage, and time.

The very low dissipation factor (DF) of C0G capacitors means minimal energy loss in AC applications, which translates directly to high Q factor — essential for resonant circuits, filters, and oscillators where low loss means better selectivity, lower phase noise, and higher efficiency. The high Q factor and excellent stability make C0G MLCCs the preferred choice for RF and timing applications where performance and consistency are critical.

For the CC0402BRNPO9BN1R8 specifically, the 1.8pF capacitance with ±0.1pF tolerance and the 0402 package size make it well-suited for miniature RF matching networks, crystal load capacitor applications, and high-frequency coupling/decoupling in compact wireless devices.

Note: The CC0402BRNPO9BN1R8 is a non-polarized capacitor — either terminal can be connected to either side of the circuit. The C0G dielectric exhibits no piezoelectric effects or DC bias capacitance loss, maintaining stable capacitance regardless of applied voltage polarity and magnitude within the rated voltage.

• RF impedance matching networks for wireless communications
• Crystal oscillator load capacitors and frequency trimming
• High-frequency band-pass and low-pass filters
• VCO (Voltage-Controlled Oscillator) resonant circuits
• RF coupling and DC blocking capacitors
• Wireless devices — Wi-Fi, Bluetooth, Zigbee, cellular
• Precision timing circuits and clock generators
• Microwave front-end circuits and LNAs
• Test and measurement instrumentation
• Satellite communication and GPS receivers