K511-K681 are low level zener diodes produced by Dinghao Electronics. They have a unique manufacturing process and remarkably sharp breaking diodes, with very low impedances at low current levels, and the lowest values of impedance ever achieved at the 250uA level.
The document provides the specifications for KNOX low‑level Zener diodes in the K511‑K681 series. It highlights the remarkably sharp breaking characteristics, very low impedance at low current levels, and the lowest impedance values achieved at 250 µA.
Key data include Zener voltage, dynamic impedance, reverse current limits, package style, power dissipation, forward voltage drop, and operating/storage temperature ranges. The diodes are supplied in a DO‑7 package and meet a standard voltage tolerance of +10 %.
| K511 Zener Voltage | 5.1 V |
|---|---|
| K511 Nominal Dynamic Impedance (250 µA) | 50 Ω |
| K561 Zener Voltage | 5.6 V |
| K621 Zener Voltage | 6.2 V |
| K681 Zener Voltage | 6.8 V |
| Package Style | DO-7 |
| DC Power Dissipation @ Ta=50 °C | 250 mW |
| Forward Voltage Drop @ If=100 mA | 1.3 V |
| Operating Temperature Range | -65 °C to +175 °C |
| Storage Temperature Range | -65 °C to +200 °C |
| Voltage Tolerance | +10 % |
They are supplied in a DO‑7 package.
The maximum DC power dissipation is 250 mW.
The forward voltage drop is 1.3 V.
They operate from –65 °C to +175 °C.