1N2985B

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1N2985B is a low-power zener diode which is widely used in the manufacture of electrical and electronic products. The zener diode is a two-terminal semiconductor device typically used for voltage regulation. A zener diode works on the principle of avalanche breakdown. The 1N2985B is one of the most common types of zener diodes and offers a wide range of applications.The 1N2985B can be used in a variety of circuit configurations and is most commonly used in voltage regulation and voltage clamping. It is also used for protection from over-voltages, which are caused by transient spikes or switching surges. Its low power dissipation makes it an ideal choice for use in low power applications where power dissipation must be minimized.The action of the 1N2985B is based on the principle of avalanche breakdown. As the voltage across the diode increases, the current passing through it increases exponentially. This causes the temperature at the junction of the diode to rise, which in turn increases the carrier concentration of the semiconductor material which eventually leads to “zener breakdown”.At zener breakdown, the device exhibits a sudden jump in current, which is known as “the zener kink”. This kink marks the voltage value at which “zener breakdown” occurs. Essentially, the zener diode is used to regulate the voltage at this value, or voltage clamping. The main advantage of this configuration is that the voltage is constantly clamped to the same value, regardless of the current in the circuit.The 1N2985B has a maximum reverse operating voltage of 6.9V and a power rating of 1/2W. The device comes in a standard DO-41 package and its low power dissipation allows it to be used in low power applications such as audio and video equipment, instrumentation, data processing and communication systems.In addition, the 1N2985B is also used as a protective device in integrated circuits, where its ability to limit the reverse voltage to 6.9V makes it an ideal choice for use in multi-processor systems. The device also finds application in medical and industrial equipment.In conclusion, the 1N2985B is an extremely versatile device and its low power dissipation makes it an ideal choice for use in a wide variety of applications. Its ability to regulate and clamp the voltage to a predetermined level makes it an invaluable asset for circuit designers.

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