BAV99QAZ

BAV99QAZ is a dual series switching diode in a single SOT-23 package. It contains two diodes wired in series: D1 from pin 1 to pin 2 (anode at pin 1, cathode at pin 2) and D2 from pin 2 to pin 3 (anode at pin 2, cathode at pin 3). The middle pin (pin 2) is the common node.
Uses:
- High-speed signal switching, clipping/limiting, and simple level-shifting networks
- Protection and conditioning in compact, low-power circuits
Why choose it:
- Small-signal, fast switching diodes with low leakage
- Very compact three-pin package suitable for SMD designs
Notes:
- Electrical ratings (forward drop, reverse voltage, current) vary by vendor; consult the datasheet for exact values.
- "QAZ" is a vendor/lot code indicating a specific variant of the BAV99 family (often RoHS-compliant).
Pinout reminder: pin 1 = D1 anode, pin 2 = D1 cathode and D2 anode, pin 3 = D2 cathode.

BAV99QAZ is a dual small-signal switching diode in SOT-23. Common equivalents include:
- MMBD4148
- 1N4148DW (dual in SOT-23)
- other vendors’ BAV99 variants (e.g., BAV99W, BAV99S)
Always verify pinout and electrical specs with the specific datasheet.

- Dual, series-connected silicon switching diodes in one SOT-23 package
- Three-terminal package with the middle node accessible (two diodes in series)
- High‑speed switching suitable for RF/signal processing, clipping, demodulation, and level shifting
- Low forward voltage drop and low leakage (good for precision switching)
- RoHS compliant and compact for surface-mount designs
- General-purpose, small-signal diodes with fast recovery for high-frequency applications

- Pin count: 3 pins (SOT-23-3 package).
- Function: BAV99QAZ contains two ultrafast switching diodes connected in series inside one package (D1: pin 1 to pin 2; D2: pin 2 to pin 3). Pin 2 is the common node (cathode of D1 and anode of D2). Used for high-speed switching, clamping, or level-shifting applications.

Manufacturer: Nexperia.
Nexperia is a global semiconductor company that designs and manufactures discrete components (diodes, transistors), logic devices and MOSFETs; it originated as a spin-off from Philips/NXP.

BAV99QAZ is a dual high‑speed small‑signal switching diode in a SOT‑23 package. Common applications:
- Fast signal switching, level shifting, and gate protection in TTL/CMOS
- Pulse shaping, edge detection, and frequency gating
- Demodulation and envelope detection in RF/communication circuits
- Clipping/limiting and peak-detection networks
- OR’ing or steering diodes in low‑current digital/analog paths
- Input protection and overvoltage clamping for IC inputs
Notes: diodes have low capacitance suitable for RF and high‑speed switching.

SOT-23 (3-pin) surface-mount package.