BAS40LT1G

BAS40LT1G is a small-signal Schottky barrier diode in a SOT-23 package. It’s designed for fast switching and low forward voltage drop, making it suitable for high-speed rectification, clamping, level shifting, and input/output protection in low-voltage circuits. The BAS40 family typically has a reverse-voltage rating around 40 V and a forward current of a few hundred milliamps (check the exact part for precise values). Forward drop is typically about 0.2–0.3 V at light to moderate currents. The device is a single diode in a 3-pin SOT-23 package; the active pins are the anode and cathode, with the remaining pin usually unused or manufacturers’ specific. For exact electrical specs, pinout, and packaging details, consult the BAS40LT1G datasheet from the manufacturer.

Common equivalents: MMBAS40 / MMBAS40LT1G (ON Semiconductor / Diodes Inc), BAS40 variants from Rohm or Vishay (BAS40, BAS40-04). BAT54S or BAV99 may substitute in some designs but have different Vf/voltage specs — always compare datasheets (Vf, Vr, If, package, capacitance) before replacing.

Here are the typical features of BAS40LT1G:
- Fast-switching, small-signal diode for high-speed circuits
- Low forward voltage drop and low reverse leakage
- Low junction capacitance suitable for RF/fast signaling
- Surface-mount device (SMD) in RoHS-compliant, lead-free package (LT1G)
- Ideal for high-speed rectification, clamping, and protection in compact designs
- Wide operating temperature range for robustness
- Tape-and-reel packaging for automatic assembly

Pin count: 2 (Anode and Cathode).
Function: The BAS40LT1G is a small‑signal Schottky barrier diode (low forward voltage, fast switching, ~40 V reverse rating). Used for rectification/clamping, high‑speed switching, level shifting and reverse‑polarity or transient protection in RF and digital circuits.

Manufacturer: Nexperia. Nexperia is a Dutch multinational semiconductor company that specializes in discrete components (diodes, transistors), as well as logic and MOSFET devices, serving broad electronic and automotive markets.

The BAS40LT1G is supplied in a SOD523 (tiny 2‑lead surface‑mount) package.