The 1N821UR thru 1N829AUR-1 series of surface mount Zero-TC Reference Diodes provides a selection of both 6.2 V and 6.55 V nominal voltages and temperature coefficients to as low as 0.0005%/oC for minimal voltage change with temperature when operated at 7.5 mA. These glass surface mount DO-213AA (MELF) reference diodes are optionally available with an internal-metallurgical-bond by adding a “-1” suffix. This type of bonded Zener package construction is also available in JAN, JANTX, and JANTXV military qualifications. Microsemi also offers numerous other Zener Reference Diode products for a variety of other voltages up to 200 V.
The 1N821UR‑1 through 1N829AUR‑1 series are surface‑mount Zener reference diodes offering 6.2 V or 6.55 V nominal voltages with extremely low temperature coefficients (as low as 0.0005 %/°C). They are supplied in a hermetically sealed glass DO‑213AA (MELF) package and are available with an internal metallurgical bond ("‑1" suffix) and various military‑grade qualifications.
The datasheet provides electrical characteristics such as voltage tolerance, Zener impedance, and power dissipation, as well as mechanical details like package dimensions, tape‑and‑reel options, and operating/storage temperature limits.
| Operating Temperature Range | -65 °C to +175 °C |
|---|---|
| Storage Temperature Range | -65 °C to +175 °C |
| Maximum Power Dissipation | 500 mW @ 25 °C |
| Reference Voltage Options | 6.2 V or 6.55 V ±5 % |
| Temperature Coefficient Range | 0.01 %/°C to 0.0005 %/°C |
| Package Type | Hermetically sealed glass DO‑213AA (MELF) |
The diodes operate from –65 °C up to +175 °C.
Each diode can dissipate up to 500 mW at 25 °C, with a maximum current of 70 mA.
The series provides nominal voltages of 6.2 V and 6.55 V, each with a ±5 % tolerance and tighter options available.
They are supplied in a hermetically sealed glass DO‑213AA (MELF) package.