The NTE5103A is a Zener diode with 1 watt of power dissipation, 180 volts of breakdown voltage, DO41/DO15 package type, single diode type, and up to 500 nanoamperes of maximum reverse current. It is manufactured by NTE Inc. USA. This diode provides precision regulation and protection against transient voltage surges in circuits with nominal output voltages of 5.5, 6.2, and 6.8 volts. It is used in general-purpose applications such as power supplies, regulators, and converters. Additionally, it can be used in military and communication systems.