BAV99W-QX

BAV99W-QX is a dual high-speed switching diode in one SOT-23 (3‑pin) package. The two diodes are connected in series with a central pin, forming a compact 3-terminal diode string suitable for signal-level switching, clipping, and level shifting in small boards. The “W” indicates the standard SOT-23 package; “QX” is the manufacturer’s variant/lot code (including packaging/lead-free details).
Typical uses include fast logic switching, detector/demodulation circuits, and small-signal clipping or protection. Electrical ratings vary by supplier, but expect a fast, low‑capacitance diode pair with modest forward current (tens to a few hundred mA per diode) and reasonable reverse voltage (tens to hundreds of volts).
For exact pinout, voltage ratings (VR), forward current (IF(AV)), forward voltage (VF), recovery times, and junction capacitance (Cj), consult the specific BAV99W-QX datasheet from the chosen vendor.

Equivalent parts for BAV99W‑QX (dual small‑signal diodes in SOT‑23) include:
- BAV99W (Nexperia) – same device
- BAV99 (cross‑refs from Vishay/ON Semiconductor)
- BAV99DW (Diodes Inc)
- MMBD4148DW (dual 4148 type, from multiple vendors)
- MMBD4148 (dual variants)
Note: always verify datasheets for exact pinout, voltage/current ratings, and packaging/date code.

- Dual high-speed switching diodes in one package (two diodes in series)
- Very fast switching with low recovery time
- Small-signal silicon diodes; suitable for high-frequency logic, clipping, level shifting, and protection
- Low leakage and low junction capacitance
- Wide operating temperature range for reliability in harsh environments
- Surface-mount package (BAV99W-QX variant) for automated PCB assembly
Note: BAV99W-QX is a dual-diode in a single SMD package; each diode is used in fast-switching or protection/clamping applications.

Pin count: 3 pins (SOT-23 package).
Function: Dual high-speed switching diodes connected in series (D1 between pins 1–2 and D2 between pins 2–3; pin 2 is the common junction).

- Manufacturer: Vishay Intertechnology (often listed as Vishay).
- What kind of company: A global manufacturer of electronic components, including discrete semiconductors (e.g., diodes), resistors, capacitors, and related passive components.

BAV99W-QX is a dual high-speed switching diode pair in one SOT-23 package. Common applications:
- Fast signal switching and shaping in digital/analog circuits
- Demodulation and envelope detection in RF/communications
- Peak clipping/limiting and level shifting in signal paths
- Small-signal rectification at high frequency
- Input protection/clamping for microcontrollers and op-amps
- Simple diode-logic/gating in low-power circuits

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