BC847BPN-QX

BC847BPN-QX is a general‑purpose small‑signal NPN transistor in an SOT‑23 package. It belongs to the BC847 family and is used for low‑power amplification and switching in compact, surface‑mount designs.
Key points:
- Package and pinout: SOT‑23, 3 leads. Pin order (front view): 1 = Emitter, 2 = Base, 3 = Collector (verify with datasheet orientation).
- Electricals (typical for grade B): Vceo ≈ 45 V; Ic up to 100 mA; hFE (gain) in the roughly 200–450 range, depending on Ic and temperature.
- Characteristics: low noise for a small transistor; suitable for signal amplification, sensor interfaces, and light switching.
- Suffix meaning: -QX denotes RoHS/compliant Pb‑free packaging with a specific tape/reel code; -PN reflects the manufacturer’s Pb‑free leadframe/packaging variant for this part.
In short: a compact, hobby/field‑friendly NPN transistor for general purpose, with decent gain and a 45 V rating, in a widely used SOT‑23 format.

Equivalent parts (same device family, SOT-23, Pb-free):
- BC847BPN (direct cross from Nexperia)
- BC847BP / BC847BV (other vendors’ Pb-free BC847 variants)
- BC847B (generic BC847 in SOT-23)
- MMBT3904 (SMT substitute with similar ratings, widely used)
Note: Pinout is the same; for exact cross, check each vendor’s cross-reference table.

BC847BPN-QX features:
- NPN general-purpose small-signal transistor
- Package: SOT-23 (3-pin), Pb-free/RoHS compliant (QX)
- Collector-emitter voltage Vceo: 45 V
- Continuous collector current Ic: up to 100 mA
- DC current gain (hFE) group B: roughly 200–450
- Temperature range: -55°C to +150°C
- Low-noise, suitable for general switching and amplification
- Complementary to BC857 (PNP) variants
Note: exact values can vary slightly by lot; this variant is the B-gain group in the BC847 family.

Pin count: 3 pins. Function: NPN general-purpose transistor (BC847BPN-QX) in SOT-23, used for switching and amplification. Typical pinout: 1 = C, 2 = B, 3 = E.

- Manufacturer: Nexperia.
- Company type: A global semiconductor company that designs and manufactures discrete and logic devices (transistors, diodes, MOSFETs, etc.), originally part of Philips/NXP and now an independent Dutch corporation.

BC847BPN-QX is a general-purpose NPN transistor (SOT-23) for low-power switching and amplification. Common applications include:
- Switching small loads such as LEDs, relays, or optocoupler drivers
- Buffering and level-shifting stages in microcontroller and logic interfaces
- Small-signal amplification and emitter-follower stages in audio or sensor front-ends
- Signal conditioning and driver stages in consumer electronics, automotive, and industrial equipment
(Uses: enabling compact, low-voltage signal paths and drive circuits in compact devices.)

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