3SMC100A TR13

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TR13, sometimes referred to as an 3SMC100A, is a type of transient voltage suppressor diode (TVS-Diodes) which is used to protect a circuit from transient voltage overshoots. They are used in applications such as over-voltage protection, lightning protection, switching voltage clamping, electrosurge protection and reverse polarity protection. TR13 diodes are designed to limit the voltage and current that can flow through them and are a cost effective way of protecting circuits from electrical surges.

TR13 diodes work by using two junctions to form an electrical field between the two junctions. In the presence of an overvoltage, the junctions momentarily short circuit and the diode acts as a clamp to limit the maximum voltage and current. This clamping action reduces the damage to electrical components by controlling the potential risk. The exact voltage level that is clamped depends on the design of the diode.

TR13 diodes are available in many varieties including ceramic, polycarbonates, metal oxide surge arresters and other configurations. The type needed depends on the application and the environment in which it will be used. For example, for a surge produced by lightning, metal oxide surge arresters are usually preferred as it can provide a more reliable protection. Additionally, for a non-aggressive transient environment, ceramic or polycarbonate TR13 will offer less resistance.

Their primary application in regards to protection is to limit the overvoltage that can occur in a circuit by clamping the voltage to a set level. This prevents the destruction or degradation of other electrical components in the circuit as the diode absorbs the overvoltage. TR13 diodes are most often used to protect the power supply of various circuits, such as computers, telecommunication systems, and mission critical industrial devices. Additionally, TR13’s can be used in applications such as reverse polarity protection, motor control and load switching.

As TR13 diodes are designed to protect against electrical transients, it is important to note that they are not suited as a substitute for a fuse or circuit breaker in the application. TR13 diodes can be destroyed by an overvoltage that is too strong, whereas a fuse or circuit breaker provides an open circuit that ensures that the power to the circuit is removed when an overload occurs.

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