The 1N6312 is a 3.3 V Zener diode, ±5% tolerance, in a through-hole DO-35 (DO-204AH) axial package rated for 500 mW continuous power dissipation. That 500 mW ceiling sets the maximum steady-state current at about 150 mA — above that, the junction temperature climbs past the 175 °C absolute max and the device drifts or fails. The 27 Ohm maximum Zener impedance (Zzt) at the test current means the regulation slope is about 27 mV per mA of load change — adequate for a simple reference or clamp, but not a precision rail. The reverse leakage is 5 µA at 1 V, which is the leakage floor before the Zener knee; below 2.5 V the part draws essentially no current, so it works as a low-leakage overvoltage clamp on a 3.3 V logic supply.
1N6312
1N6312 Zener Diode 3.3 V 500 mW ±5% DO-35 Axial
MPN1N6312
Active
Microchip Technology 1N6312 Zener diode, 3.3 V nominal, 500 mW, ±5% tolerance, DO-204AH (DO-35) axial, through hole, bulk.
$8.0850Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Mounting | Through Hole |
| Voltage - zener (Nom) | 3.3 V |
| Voltage - forward (Vf) (Max) @ if | 1.4 V @ 1 A |
| Current - reverse leakage @ vr | 5 µA @ 1 V |
| Power - max | 500 mW |
| Operating temperature | -65°C~175°C |
| Package | Bulk |
| Tolerance | ±5% |
| Case | DO-204AH, DO-35, Axial |
| Impedance (Max) | 27 Ohms |