Home > News > Industry News

Inside the Shield: Exploring the Primary Components of OBO Type Surge Protection Devices



Surge Protection Devices (SPDs) play a crucial role in safeguarding electrical systems from the detrimental effects of power surges. OBO Type Surge Protection Devices, bearing the reputable OBO Bettermann brand, are known for their reliability and effectiveness. In this blog post, we'll embark on a journey inside these protective shields, exploring the primary components that make OBO Type SPDs robust defenders against transient overvoltages.

1. Metal Oxide Varistors (MOVs):

  - At the heart of OBO Type Surge Protection Devices are Metal Oxide Varistors (MOVs). MOVs are semiconductor devices that respond to voltage spikes by rapidly changing their resistance. They act as the first line of defense, absorbing and dissipating excess energy during a surge.

2. Gas Discharge Tubes (GDTs):

  - Working in tandem with MOVs, Gas Discharge Tubes are another critical component. GDTs provide additional protection by quickly conducting excess voltage to the ground. These tubes help prevent sustained overvoltages and contribute to the overall reliability of the surge protection system.

3. Thermal Disconnectors:

  - OBO Type SPDs often incorporate thermal disconnectors, which act as safety mechanisms. In the event of prolonged exposure to high currents, the thermal disconnectors interrupt the circuit, preventing overheating and potential damage to the surge protection device.

4. Status Indicators:

  - To keep users informed about the operational status of the surge protection system, OBO Type SPDs may feature status indicators. These indicators provide visual feedback, signaling whether the device is functioning correctly or if it requires attention.

5. Enclosure and Mounting Hardware:

  - The physical structure of OBO Type Surge Protection Devices is designed for durability and ease of installation. The enclosure, often made of robust materials, protects the internal components from environmental factors and mechanical stress. Mounting hardware ensures secure placement within electrical systems.

6. Remote Signaling Contacts:

  - In some applications, remote monitoring is crucial. OBO Type SPDs may include remote signaling contacts, allowing integration with monitoring systems. This feature enables users to receive alerts or notifications about the status of the surge protection device from a central location.

7. Filter Circuits (Optional):

  - Depending on the specific model and application requirements, OBO Type Surge Protection Devices may incorporate filter circuits. These circuits help mitigate electromagnetic interference (EMI) and radiofrequency interference (RFI), contributing to the overall cleanliness of the power supply.

8. Internal Wiring and Connections:

  - The internal wiring and connections within OBO Type SPDs are meticulously designed to handle high currents while maintaining electrical integrity. Quality materials and workmanship ensure reliable conductivity and reduce the risk of internal failures.

9. Overcurrent Protection (Optional):

  - In certain scenarios, OBO Type Surge Protection Devices may include overcurrent protection features. These features enhance the device's ability to withstand sustained overcurrent conditions, offering an additional layer of defense against extreme events.

10. DIN Rail Mounting (Optional):

   - For streamlined integration into electrical panels and systems, OBO Type SPDs may feature DIN rail mounting options. DIN rail compatibility simplifies the installation process and facilitates the organization of surge protection devices within a control panel.


OBO Type Surge Protection Devices embody a synergy of sophisticated components designed to provide robust defense against power surges. From MOVs and GDTs to thermal disconnectors and status indicators, each component plays a vital role in ensuring the reliability and effectiveness of these protective devices. As guardians of electrical systems, OBO Type SPDs stand as a testament to the commitment of OBO Bettermann to quality and innovation in the realm of surge protection.

Previous:No News
Next:No News

Leave Your Message