Capacitor networks – find manufacturers and suppliers

Capacitor networks are components that integrate several individual capacitors in a single housing.

Instead of placing several individual capacitors on the circuit board, they are combined in one compact component. The networks are designed in such a way that their connections and internal wiring are standardized and easy to assemble.

Below you will find an overview of the functionality, structure and technologies of capacitor networks, as well as an overview of their typical use and their advantages and disadvantages:

How capacitor networks work:

At their core, capacitor networks work no differently than individual capacitors:
They store electric charge in the electric field between two conductive surfaces separated by a dielectric. The capacitance of each element in the network determines how much charge can be stored and how well it can block or pass AC voltages of certain frequencies.

The internal wiring is the decisive difference:

1. In a "common" network, all capacitors share one connection, typically ground. The other connections each lead to a signal pin.
2. In an "Isolated" network, all capacitors are completely separate. Each has two separate pins.

Integration in one component saves installation space and solder joints.

Design and technologies of capacitor networks:

Capacitor networks are usually manufactured using multilayer ceramic technology (MLCC). Thin ceramic layers and electrodes are stacked so that many capacitors are tightly packed in a compact housing.

The choice of dielectric, e.g. NP0/C0G or X7R, influences capacitance stability, temperature behavior and dissipation factor. Networks are available in very small SMD sizes about the size of single 0603 or 0805 capacitors or as slightly larger leaded arrays.

Typical use of capacitor networks:

Capacitor networks are used in many areas of modern electronics:

1. Decoupling digital circuits:
A "common" network is often used to decouple several supply pins of an IC to ground at the same time.
This allows several power supply lines to be cleanly filtered with a single component.

2. Bus lines:
With parallel data buses, the signal lines are often individually terminated or decoupled to ground with small capacitors.
A capacitor network makes this much easier.

3. Pull-down/pull-up networks with capacitance:
In some designs, an RC network is used to stabilize inputs.
Ready-made networks can combine such functions.

4. Filter applications:
Multiple capacitors can sit near a connector or interface as a simple multi-channel filter and reduce common mode noise.

5. Space-critical designs:
Smartphones, tablets and other extremely compact devices use networks extensively to maximize component density.

Advantages of capacitor networks:

• Space savings: multiple capacitors in a single package reduce the amount of board space required.
• Simplified assembly: Fewer pick-and-place steps and solder joints save time and costs.
• Reduced component diversity: Instead of stocking many different individual capacitors, a network can cover several values or several identical values.
• Design simplification: Pre-determined wiring in the component saves space and routing effort.
• Reliability: Fewer solder joints means potentially fewer failure points.

Disadvantages of capacitor networks:

• Fixed wiring: once specified - you have less flexibility in the layout than with individual capacitors.
• Dependence on the supplier: With very specific networks, replacements can be more difficult to obtain.
• Capacitance dispersion: Networks often share the same tolerance as individual capacitors, but can vary across all elements.
• Cost: Sometimes more expensive per capacitance value than individual components, especially with high voltage or precision requirements.

Capacitor networks are a highly integrated and practical solution for accommodating multiple capacitors in a single component. Their functionality is similar to that of single capacitors, but they save space, reduce assembly costs and improve manufacturing efficiency. Typical applications include decoupling multiple supply pins from ground, filtering parallel data lines and saving space in very dense designs. For professional electronics developers, capacitor networks are an important means of realizing compact and cost-efficient PCB layouts.

Below you will find an overview of the most important points to consider when purchasing capacitor networks:

Purchasing capacitor networks is not just about finding the cheapest solution per piece. It is crucial that the network really fits the circuit, production and quality requirements - and that over the entire product life cycle.

• The key question is: What capacitance values are required per capacitor? Networks are available in fixed values, such as 10 nF, 100 nF or 1 µF per channel.
• The tolerance, e.g. ±10 %, ±20 %, must also be suitable, especially if the networks are intended for filter purposes or analog applications.
• The dielectric strength is just as important. It must be higher than the operating voltage, including the safety reserve. This should not be neglected, especially for designs with 12 V, 24 V or higher peaks.
• Many networks are made of ceramic (MLCC). There are different dielectrics with very different properties. NP0/C0G offers extremely stable capacitance over temperature and voltage - ideal for precision applications. X7R is cheaper and more compact, but its capacitance is variable with temperature and voltage. Purchasing must match exactly what the circuit needs.
• The specified temperature range is also important. The standard range is -40 °C to +85 °C or +125 °C. Automotive or industrial applications may require even more.
• The network type and the internal wiring are also important. There are two main types:
• "Common" networks with a common pin (usually ground), where all capacitors are wired against this connection.
• "Isolated" networks, where each capacitor is completely separate.
• When purchasing, it must be clear which type is required for the layout. The wrong types often cannot be replaced.
• A professional purchaser always checks whether the component fits mechanically and electrically into the intended layout. SMD networks are available in different housing sizes and pin spacings. Incorrect selection can mean that the components cannot be assembled by machine or that they waste space on the circuit board.
• The ESR (Equivalent Series Resistance) is particularly important for decoupling purposes in digital circuits. An ESR that is too high can lead to inadequate filtering. With very fast signals, the ESL (Equivalent Series Inductance) can also be relevant.
• A professional purchaser ensures that the selected type has a sufficiently low impedance for the desired frequency.
• Industrial and automotive applications often require robust components with proven quality. This includes certifications such as AEC-Q200, proven suppliers with quality management such as ISO 9001 and stable, documented production.
• Lifetime aspects are also important: ceramic networks are usually very durable, but there are differences in ageing and dielectric strength. Purchasing checks whether the service life covers the product cycle.
• Responsible purchasing rarely works with just one supplier. Particularly in the case of networks that can be layout-specific, it is important to check whether alternative manufacturers offer the same pinout and design.
• Supplier evaluation, consistency across batches and clean documentation, e.g. data sheets, PCN/EOL notifications, are also mandatory.
• The delivery form must match the production - usually belts for automatic assembly. Check whether packaging units, humidity specifications (for certain types) and storage conditions are compatible with the production process.
• Ensure that the capacitor networks are RoHS compliant and do not contain any banned substances. REACH compliance and other local legal requirements must also be observed. Non-compliant components can make it impossible to sell an end product.
• Professional purchasing not only calculates the unit price. Assembly costs (less space, fewer pick-and-place cycles), warehousing, obsolescence risks and possible warranty costs in the event of failures are also included. A more expensive but higher quality network can reduce costs in the long term.
• Electronic products often run for many years. Purchasing must check whether the selected network is available in the long term and how the manufacturer communicates discontinuations (EOL). Good planning avoids rework or costly redesigns.

When purchasing capacitor networks professionally, pure capacity is only one aspect of many. Exact electrical specifications such as capacitance, voltage, tolerance, dielectric, the correct wiring (common or isolated), design compatibility, quality and reliability requirements, supplier management, packaging and suitability for assembly as well as environmental and cost aspects over the entire product life cycle are crucial. Only proper coordination with development and production ensures that the networks not only fit technically, but can also be used economically and reliably.

Capacitor networks can be obtained from various suppliers. Comprehensive information about manufacturers and suppliers of Capacitor networks from all over the world can be found on Exportpages.