The BB 837 is a silicon tuning diode produced by Dinghao. It is mainly used in TV-sat indoor units. It has the characteristics of extended frequency range up to 2.8GHz and high capacitance ratio.
This handbook describes the Siemens BB 837 silicon tuning diode, a high‑capacitance device intended for TV‑sat indoor units with an extended frequency range up to 2.8 GHz. It lists the part number, package type (SOD‑323), and ordering code.
Key data include maximum reverse voltage, forward current, temperature limits, and detailed DC and AC electrical characteristics such as reverse current, capacitance, series resistance and inductance. The document also provides typical capacitance values at various bias voltages and frequencies.
| Diode reverse voltage (Vp) | 30 V |
|---|---|
| Peak reverse voltage (Vem) | 35 V |
| Forward current (Ir) | 20 mA |
| Operating temperature range (Top) | 5 …+150 °C |
| Storage temperature (Tstg) | 5 …+150 |
| Reverse current (IR, typical max) | 10 nA |
| Reverse current (Ip, max) | 200 |
| Diode capacitance Cr at 1 V, 1 MHz | 6 pF |
| Capacitance ratio Cr1/Cr2 | 12 |
| Series resistance (Is) | 1.5 Ω |
| Series inductance (Ly) | 1.4 nH |
The diode reverse voltage (Vp) is rated at 30 V.
The forward current (Ir) rating is 20 mA.
It operates from 5 °C up to +150 °C.