1210L175SLYR

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PTC Resettable Fuses are self-resetting thermal protection devices that provide complete circuit protection. The 1210L175SLYR is a resettable fuse made with a PTC switch and a resistor network that together provide overcurrent protection.

Application

The 1210L175SLYR is specifically designed for overcurrent protection in handheld, vehicular and consumer electronics applications and can protect against harmful electrical faults. It is ideal for task lighting, power panel metering and other power control circuits. The device has an overvoltage lockout feature and can protect equipment from false thumps. The device is also great for low-current applications, and it supports are supply currents of up to 3 A. Its quick response time enables it to detect short-circuit currents in milliseconds and reset quickly. Moreover, the device has an operating temperature range of -40°C to 150°C.

Working Principle

The 1210L175SLYR functions using a two-part design: the PTC switch and the resistor network. This is the unique protective mechanism that allows both parts to work together to provide enhanced circuit protection. The Protected Switch connects the input and output electrical terminals, and it is the primary part of the circuit that continuously provides protection against short-circuits and other overcurrent conditions. When an overload is detected, the resistor network senses the current passing through the PTC switch and limits the voltage across the switch to provide a safe level. At the same time, the resistor net draws the heat away from the terminal to prevent overheating.

When overloading occurs, the switch rapidly opens and then its resistance increases quickly enough to prevent current flow, allowing the circuit voltage to climb quickly and safely. The resistor network then begins to dissipate heat through the PTC switch, limiting the heat buildup and protecting the device from damage. Once the overcurrent condition is cleared, the 1210L175SLYR quickly resets itself, allowing normal operation to resume. The device itself is designed to withstand high temperatures, and its self-healing properties make it incredibly durable and reliable.

The 1210L175SLYR PTC resettable fuse can withstand repetitive overcurrents due to its high surge strength and unique circuitry. It is a cost-effective and reliable solution for overcurrent protection in a wide range of applications. The device\'s wide temperature range and high surge strength make it an ideal choice for portable and consumer electronics applications, as well as task lighting, power panel metering and power control circuits. Furthermore, its self-healing properties make it an dependable choice for positive circuit protection.

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