PSM4-821M-02B

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Feed-through capacitors are passive electronic components used in circuit designs to block or filter the direct current (DC) passing through the circuit while allowing alternative current (AC) to pass through. Feed-through capacitors, also known as fusing capacitors, ferrule capacitors, and safety capacitors, consist of multiple plates of metal foil and dielectric material. The PSM4-821M-02B is an example of a non-polarized feed-through capacitor, having a capacitance of 821 pF at a ± 10% tolerance. Its wide operating range includes varying temperatures, voltages and frequencies. This capacitor is encased in an earthed metal housing and also features safety protection.

The PSM4-821M-02B feed-through capacitor primarily operates as a power line filter, meaning it suppresses electromagnetic interference (EMI) on the DC portions of the power line of an electronic circuit, such as direct current power supplies, uninterruptible power supplies (UPS), and even diagnostic or medical instruments. It also filters incoming power into the circuit, preventing surges and protecting the remaining components from over-voltage.

More specifically, the PSM4-821M-02B feed-through capacitor has a transmission range of 0 Hz to 1 MHz, and works with a maximum impulse voltage of 10kV. It is rated with a maximum insulation resistance of 5000MΩ/250V DC, and a maximum dielectric withstanding voltage of 2000V AC/2s. The rise time of the capacitor is 5s, and features a voltage of 55V/DC.

In order to ensure proper functioning of the PSM4-821M-02B feed-through capacitor, it must be securely mounted at the power line input of the device. The capacitor is meant to be connected externally between and phase and line conductors. This connection makes the capacitor function to provide EMI suppression allowing the AC power to pass through while blocking any DC portions of the power line. This helps reduce EMI and can even suppress some forms of radio frequency interference (RFI).

The PSM4-821M-02B feed-through capacitor can be used in a variety of applications, such as power supplies, UPS, medical devices, laboratory test equipment, and measuring instruments. The capacitor is especially beneficial in protecting against EMI in medical imaging systems, where it is used to prevent malfunction due to interference between imaging components and the patient’s body. Additionally, the capacitor can help protect electronics from electrical damage due to spikes or surges in the power line, making it ideal for applications where power line reliability is critical.

Overall, the PSM4-821M-02B feed-through capacitor is a highly reliable component used to improve electrical system performance in areas where reliable power is essential. It boasts excellent attenuation of EMI, making it suitable for medical and other sensitive equipment applications. With its high electronic and physical durability, the capacitor is a useful tool for providing reliable, long-term protection in harsh power line environments.

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