Thermally Protected Varistors – TMOV® and iTMOV® Series

Littelfuse's TMOV and iTMOV thermally protected varistors represent a development in integrated circuit protection, offering quick thermal response due to their close proximity of the integrated thermal element to the MOV body. The integrated configuration also offers lower inductance than most discrete solutions, resulting in improved clamping performance to fast overvoltage transients. The iTMOV varistor differs from the TMOV varistor by the inclusion of a third lead to indicate the MOV has been disconnected from the circuit. This lead facilitates connection to monitoring circuitry. In conjunction with appropriate enclosure design, these thermally protected varistors with integrated thermal elements help facilitate SPD module compliance to UL1449 for both cord connected and permanently connected applications.

Resources

• Application Note

Features

• Designed to facilitate compliance to UL1449 3rd Edition for SPD products
• High peak surge current rating up to 10 kA
• Low leakage
• -55°C to +85°C operating temperature range
• Three-lead version available for indication - iTMOV series