The BB621 and BB622 are silicon epitaxial planar capacitance diodes supplied in MiniMELF packages, designed for automatic insertion and wide capacitance variation to tune VHF and UHF television bands. The diodes are offered as single units or matched sets and are delivered taped.
The document lists absolute maximum ratings, capacitance values at various bias voltages, series resistance, leakage current, and Q‑factor versus frequency. It also defines the tracking condition for matched groups, ensuring a maximum capacitance deviation of 2.5 % across the reverse bias range.
| Reverse Voltage (VR) | 32 V |
|---|---|
| Junction Temperature (TJ) | 125 °C |
| Storage Temperature Range | -55 °C to +150 °C |
| Series Resistance at 470 MHz, C=9 pF (BB621) | 0.55 – 0.7 Ω |
| Leakage Current at 30 V | 30 nA |
| Series Inductance | 2 nH |
| Weight per diode | ≈0.05 g |
Both BB621 and BB622 are rated for a reverse voltage of 32 V.
The diodes can be stored from –55 °C up to +150 °C.
Each diode weighs approximately 0.05 g.