Axial Leads Varistors
Description
Axial leads varistors are electronic components designed to protect circuits from overvoltage conditions. They function as voltage-dependent resistors, where their resistance decreases as the voltage increases, thereby forming a low-resistance path to shunt excess voltage away from sensitive components.
Working Principle
Axial leads varistors operate by changing their impedance in response to voltage levels. When exposed to high voltage transients, their impedance decreases significantly, allowing them to clamp the transient voltage to a safe level. This behavior is similar to back-to-back Zener diodes, providing excellent transient suppression performance. The varistor absorbs the potentially destructive energy of the incoming transient pulse, thus protecting vulnerable circuit components and preventing costly system damage .
Applications
Axial leads varistors are used in various applications where overvoltage protection is critical. Specific examples include their use in telecommunications devices, power supplies, data systems, and power systems. They are also employed in consumer electronics such as cell phones, digital cameras, personal digital assistants (PDAs), MP3 players, and notebook computers .
Advantages over other Varistors
Axial leads varistors offer several advantages over other types of varistors. They provide fast response times and low clamping voltage, which are crucial for effective overvoltage protection. Additionally, they exhibit low working voltages and low leakage current, making them suitable for a wide range of applications .
Limitations
One limitation of axial leads varistors is their temperature dependence. The performance of these varistors can vary with temperature changes, which may affect their clamping voltage and overall effectiveness in certain environments .
Considerations
When selecting axial leads varistors, several considerations should be taken into account. Initial costs and operating expenses can vary depending on the specific requirements of the application. Durability and accuracy are important factors, as they determine the long-term reliability of the varistor in protecting circuits. Replacement and maintenance costs should also be considered, as these can impact the overall cost-effectiveness of using axial leads varistors in a given application. Performance specifications such as maximum AC RMS voltage, maximum clamping voltage, and operating temperature are critical to ensure the varistor meets the necessary protection standards .
from DigiKey
220V 100A Varistor 1 Circuit Through Hole SOD-83A Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 185
- Mounting Option: Through Hole; Other
from DigiKey
82V 40A Varistor 1 Circuit Through Hole SOD-83A Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 185
- Mounting Option: Through Hole; Other
from DigiKey
8.5V 40A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
8.5V 150A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
18.5V 40A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
18.5V 150A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
25.5V 40A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
25.5V 150A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
34.5V 120A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
41V 120A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
76V 300A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
62V 100A Varistor 1 Circuit Through Hole Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 257
- Mounting Option: Through Hole; Other
from DigiKey
120V 100A Varistor 1 Circuit Through Hole SOD-83A Axial [See More]
- Lead Style: Axial
- Operating Temperature: -67 to 185
- Mounting Option: Through Hole; Other
from EPCOS AG
The development, manufacture and marketing of electronic components, modules and systems represents the largest business segment of the TDK Group. TDK focuses on demanding markets in the areas of information and communication technology and consumer, automotive and industrial electronics. Electronic... [See More]
- Lead Style: Radial; Axial; None
- Operating DC Voltage: 1465
- Mounting Option: Surface Mount Technology
- Operating AC Voltage: 1100
from Utmel Electronic Limited
VARISTOR 270V 100A SOD83A AXIAL [See More]
- Lead Style: Radial; Axial
- Mounting Option: Through Hole; Other
- Diameter: 3
- Operating DC Voltage: 270
from Littelfuse, Inc.
The MA Series of Transient surge suppressors are axial-lead metal oxide varistors (MOVs) for use in a wide variety of board level industrial and commercial electronic equipment. They are intended to protect components and signal/data lines from low energy transients where the small axial lead... [See More]
- Lead Style: Axial
- Operating AC Voltage: 57
- Operating DC Voltage: 120