PTGL6SAR0R8M1B51A0

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PTC resettable fuses have become increasingly popular since their invention in the late 1960s. Those fuses provide a reliable and cost-effective form of over-current protection. They can be applied in a variety of applications and provide safe and dependable operation with minimal maintenance.

The PTC resetable fuse, or PPTC (Polymer Positive Temperature Coefficient Resettable Fuse), can be found with a different alphanumeric model codes like PTGL6SAR0R8M1B51A0. This particular model is an AC two-pad high-temperature, surface mount resettable fuse.

The PTGL6SAR0R8M1B51A0 is most suitable for applications such as the protection of high-class electronic equipment, consumer and lighting products, and similar equipment. It comes with an external heat shrink tube for added moisture protection. The unit also has a built-in resin sealed structure for a dust-proof and waterproof design.

The working principle of PPTC resetable fuses is based on the fact that a polymer material changes its electrical characteristics as its temperature rises. When the device’s current is abnormally high, it will induce heat due to its I2R loss and the heat will rise to a point that the polymer material will increase its resistance significantly, thus limiting the current. The errant current will be reduced to a level below the rated value and the PTC resetable fuse will be reset. Such a working principle applies to all PTC resettable fuses.

PTC resettable fuses are usually mounted on the PCB, and their size and shape vary depending on their rated current and voltage. However, there are some common features for all PTC resettable fuses. They come with two contacts, usually tin-plated steel with a solder house section and a heat shrink tube section. The device’s reset voltage can range from 100V to 6000V, and its rated current ranges from 0.2A to 50A.

Apart from the PTGL6SAR0R8M1B51A0, there are a wide range of other PTC resettable fuses available to meet all kinds of applications, from consumer products and automotive systems to industrial equipment. All these fuses share the same working principle, making them reliable and cost-effective protection units.

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