Diodes Incorporated BC847BWQ-13-F

Overview

BC847BWQ-13-F from Diodes Incorporated is an NPN small-signal transistor in SOT323 package, rated for 45 V V_CEO, 100 mA I_C, and 200–450 h_FE (Band B), with 4 kV HBM ESD rating and 200 mW power dissipation. It serves as a general-purpose switch or low-noise amplifier in compact consumer and industrial control circuits.

For engineers reviewing the BC847BWQ-13-F datasheet, BC847BWQ-13-F pinout, BC847BWQ-13-F application, or BC847BWQ-13-F equivalent, key selection criteria include its SOT323 footprint compatibility, guaranteed h_FE range, V_CE(sat) at 10 mA/0.5 mA drive, thermal derating above 25°C, and automotive-grade availability via AEC-Q101 qualification path.

Technical Context

This transistor operates in linear or saturated switching modes with a transition frequency f_T of 100–300 MHz at 5 V V_CE and 10 mA I_C, supporting audio-frequency amplification and digital logic interfacing. Its low 3–4.5 pF C_obo and 10 dB noise figure at 1 kHz make it suitable for low-distortion signal conditioning stages.

The device uses epitaxial planar die construction with matte tin-plated leads, rated for -65°C to +150°C operation and moisture sensitivity level 1 per J-STD-020. Thermal resistance R_θJA is 625°C/W on minimum FR4 pad layout, requiring derating above 25°C ambient per Figure 1.

Key Specifications

Pinout & Package

Package: SOT323 - ultra-small surface-mount plastic package (2.15 mm × 2.10 mm × 0.95 mm), optimized for high-density PCB layouts and automated placement.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN small-signal transistor applications.

Compared with BC847BWQ-13-F, BC847BWT-7-F offers identical performance in a smaller reel format, while MMBT3904LT1G trades gain and saturation voltage for SOT23 compatibility-making the original optimal for high-density SOT323 designs needing guaranteed Band B h_FE.

Availability

BC847BWQ-13-F is available at Aetrix Electronics and suitable for LED driver circuits, microcontroller GPIO interfaces, and audio pre-amplifier stages requiring stable component supply, consistent parametric binning, and long-term manufacturability.

Supply support for BC847BWQ-13-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

The BC846–BC848 series belongs to Diodes' general-purpose bipolar transistor product line, engineered for cost-sensitive, space-constrained applications where reliability, consistency, and RoHS compliance are mandatory-especially in consumer, industrial, and automotive-qualified systems.

FAQ

What is the exact marking code for BC847BWQ-13-F on the SOT323 package?

The top-side marking is "K1R", followed by a two-character date code (e.g., "L2" for February 2024). This matches Diodes' official ordering information table and is verified on production units shipped in 13-inch reels. No "Q" appears in the physical marking-the "Q" in the part number denotes tape-and-reel packaging qualification, not a visible symbol.

Is BC847BWQ-13-F qualified to AEC-Q101 for automotive use?

BC847BWQ-13-F itself is not pre-qualified to AEC-Q101, but Diodes offers automotive-grade versions (e.g., BC847BWQ-13-F-A) with full PPAP documentation, IATF 16949 manufacturing, and stress-tested lots. Standard BC847BWQ-13-F may be used in non-safety-critical automotive modules pending customer qualification.

How does thermal derating work for BC847BWQ-13-F above 25°C ambient?

Per Figure 1 in DS30250 Rev. 16-2, power dissipation must be linearly reduced from 200 mW at 25°C to zero at 150°C ambient. The derating slope is -1.6 mW/°C, meaning at 75°C ambient, max allowable P_D is 120 mW. This assumes minimum recommended copper pad layout on FR4.

Can BC847BWQ-13-F replace BC847C variants in existing designs?

No-BC847BWQ-13-F has h_FE 200–450 (Band B), while BC847CW has h_FE 420–800 (Band C). Substituting without circuit review risks insufficient gain at low I_C or excessive base current demand. Only interchange within same band (e.g., BC847BW ↔ BC847BWQ) is electrically safe.