The JANTX1N973B-1 is a 500 mW Zener voltage regulator in a hermetically sealed DO-35 glass package, designed for high-reliability applications. It provides a nominal Zener voltage of 33V at a test current of 3.8 mA and has a maximum Zener impedance of 58 Ohms. This device features a maximum DC Zener current of 12 mA and a low maximum reverse leakage current of 0.5 µA at 25V. With an operating temperature range of -65°C to +175°C and an internal metallurgical bond, it ensures stable voltage regulation across broad operating conditions. As a JANTX-qualified component, it is suitable for demanding military and aerospace applications requiring robust performance.