13 V regulation in a DO-35 axial footprint
The 1N6003B is a 13 V zener diode from Microchip Technology in the standard DO-204AH (DO-35) axial-lead package, rated for 500 mW continuous power dissipation. With a ±5% tolerance on the nominal zener voltage, the regulation window spans 12.35 V to 13.65 V at the specified test current — tight enough for most reference and clamping applications in through-hole designs.
Military temperature grade and dynamic impedance
The operating junction temperature range of -65°C to 175°C qualifies this diode for harsh-environment roles — avionics, downhole instrumentation, or engine-bay electronics where commercial-grade parts would drift out of regulation. Maximum zener impedance (Zzt) is 25 Ohms at the knee current; this dynamic resistance determines how much the regulated voltage shifts with load current — lower impedance means tighter line regulation in the shunt configuration. Reverse leakage is specified at 100 nA maximum when biased at 9.9 V, well below the zener threshold, confirming the diode blocks cleanly in the off state.
Obsolete — sourcing through surplus channels
No factory lead time or last-time-buy window applies.