100D125Q

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The 100D125Q electrical specialty fuse is designed for a range of specific applications.Overview of its working principles will be progressed in the ensuing discourse.

Design, Construction and Requirements

The 100D125Q is a 5 x 20 mm size fast-acting blade fuse with a high-temperature body. It achieves high current limiting performance with UL94V-2 body sealing. The shape of the body is cylindrical and the contact form is a blade type. It is constructed in a DC circuit for rated current of 4.5A at 125V.It utilizes Nickel-plated blades for superior strength. The terminal specifications are highly varied to range from spade, ring, and piggyback to Bayonet (captive) and “captive with variant”. Operating ambient temperatures range from -20°C(-4°F)to 85˚C(185°F). It operates as a standard fuse, with its element fully inserted into the fuse arm. If the current passes the fuse’s pre-set limit, the element melts,fault is interrupted and the fuse opens.

Application Field

Due to its ability for current limiting with fast-acting response, the 100D125Q is suitable for a myriad range of circuit protection applications, especially in automobile protections.It is commonly employed as a “blade style” SPD (surge protective device) in secondary AC/DC suppression circuitry.It is usually used in a variety of cars, motorcycles and other automotive electronic equipment, as a protection device for the circuit. In some situations, it is applied to protect power cords and supplies,as an over-current protective measure in DC power supplies. It is also used to spot the electric leakage current and in "systems" with AC or DC switchgear.

Working Principle

It has been established that the 100D125Q fuse is a fast-acting one; hence when its pre-set limit of current is remotely exceeded, the fuse element melts, forming an open circuit. The fast action of the fuse is achieved by means of a fast-acting element, in which a non-metallic strip melts gradually on approached of its pre-set limit – making a temporary flow of current before shortly opening the circuit, shunning permanent fault burning of the device. The necessary limitations for the current flow is adequately set up by the non-metallic strip.At temperatures of 85˚C, the resistance of the fuse rises as the coil reaches its maximum temperature point. As a result, a continuous burn of current is prevented thanks to the fuse’s built-in circuitry over-heat protection.

Conclusion

The 100D125Q is an electrical specialty fuse which entails a range of specific applications due to its fast-acting production technology. Its ability for current limiting is apt for automobile voltage circuit protection, and its overload protection characteristic in DC power supplies is exemplary. Lastly, the built-in circuitry temperature protection rounds-off the list of its multi-faceted reputation.

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