BB178 is a variable capacitance diode from Philips. It uses planar technology and is packaged in a SOD523 (SC-79) ultra small plastic package. The device has excellent linearity and matching performance and can be used in VHF television tuners and VCOs.
The BB178 is a planar‑technology VHF variable capacitance diode offered in an ultra‑small SOD523 (SC‑79) plastic surface‑mounted package. It features excellent linearity, low series resistance, and a matching performance achieved by a Direct Matching Assembly (DMA) process.
Key specifications include a reverse voltage rating of 32 V, a peak reverse voltage of 35 V, a forward current limit of 20 mA, and operating temperature ranges from –55 °C to +150 °C (storage) and –55 °C to +125 °C (junction). The device is intended for electronic tuning in VHF television tuners and voltage‑controlled oscillators.
| Maximum reverse voltage | 32 V |
|---|---|
| Maximum forward current | 20 mA |
| Storage temperature range | -55 °C to +150 °C |
| Junction temperature range | -55 °C to +125 °C |
| Capacitance at 1 V bias | 34.65 pF – 42.35 pF |
| Package type | SOD523 (SC‑79) plastic surface‑mounted, 2‑lead |
The maximum reverse voltage is 32 V.
It uses a plastic surface‑mounted SOD523 (SC‑79) package with two leads.
Typical capacitance ranges from 34.65 pF to 42.35 pF at 1 V.