BAS40-05-QR

BAS40-05-QR is a BAS40 family fast-switching, small-signal silicon diode in a QR (SMD) package. It’s intended for high-speed switching and signal-level rectification in compact, surface-mount designs.
Key points:
- Type: fast-switching diode (not a power rectifier).
- Package: QR, RoHS-compliant SMD two-terminal device.
- Typical uses: high-speed logic, RF/demod circuits, sampling, protection/clamping on signal lines.
- Electrical characteristics (typical ranges; check datasheet for exact): forward current up to a few hundred mA; reverse voltage in the tens of volts range (common BAS40 variants around 60–75 V); forward voltage about 0.6–0.8 V at moderate current; very fast recovery with low junction capacitance.
- How to use: connect anode to the source, cathode to the load; ensure the current and reverse voltage do not exceed the rated values.
- Why choose: small footprint, fast switching, low capacitance, RoHS-compliant.
For precise parameters (Vr, If, Vf, tr, Cj) for BAS40-05-QR, consult the manufacturer’s datasheet for the exact variant.

Here are typical features of BAS40-05-QR:
- Single Schottky barrier diode
- Reverse voltage rating: up to about 50 V
- Forward current rating: around several hundred mA (≈200 mA range)
- Very low forward voltage drop (Schottky, typically ~0.2–0.45 V at low to moderate current)
- Extremely fast switching with negligible reverse recovery
- Surface-mount device in QR package (compact, suitable for automated assembly)
- RoHS compliant
- Wide operating temperature range (typical -55°C to 150°C)
- Applications: general fast rectification, polarity protection, clamping/level shifting, decoupling circuits
Note: exact numbers can vary slightly by supplier; check the specific datasheet for precise Vr, If, and package details.

SOD-323 (two-terminal SMD diode) package.

- Pin count: 3 pins (SOT-23-3 package).
- Function: BAS40-05-QR is a dual silicon switching diode array (two diodes in one package, with a common terminal). Used for high‑speed switching, clamping, or signal routing (orientation of the diodes depends on the variant).

Manufacturer: Nexperia. Nexperia is a global semiconductor company that designs and manufactures discrete components and logic devices, including diodes, transistors, and protection devices.

BAS40-05-QR is a fast, small‑signal switching diode. Common applications include:
- High-speed switching, digital logic level shifting and low-current OR-ing in SMD circuits
- RF/IF front ends for envelope detection, clipping/limiting and peak detection
- Detector diodes in demodulation circuits
- Input protection and clamp/limiter diodes in receivers
(Uses: fast switching, signal conditioning, and basic protection in compact layouts.)

Equivalent parts to BAS40-05-QR (dual Schottky diodes in SOT-23) from other vendors include:
- BAT54S (dual Schottky, common cathode)
- BAT54C (dual Schottky, common anode)
- BAS40-04 / BAS40-06 (same BAS40 family in similar packages)
Note: verify pinout, voltage/current ratings, and cathode/anode configuration for exact replacement.