Infineon Technologies BC 847C B5003

Overview

BC847C from Nexperia is an NPN silicon general-purpose bipolar junction transistor (BJT) designed for audio-frequency input stages and driver applications. It delivers high DC current gain (h_FE = 420–520 at I_C = 2 mA), low V_CE(sat) (≤250 mV at I_C = 10 mA / I_B = 0.5 mA), and low noise (F = 1.2–4 dB at 1 kHz), making it suitable for low-noise preamplifier and switching buffer circuits in consumer audio and industrial control interfaces.

For engineers reviewing the BC847C datasheet, BC847C pinout, BC847C application, or BC847C equivalent, key selection criteria include its SOT23 package compatibility, AEC-Q101 qualification for automotive-grade reliability, guaranteed h_FE group C performance, and validated thermal resistance (R_thJS ≤ 240 K/W) under continuous operation up to T_j = 150 °C.

Technical Context

The BC847C operates as a discrete NPN BJT with fixed emitter-base and collector-base junctions, requiring external biasing networks for linear amplification or saturated switching. Its h_FE grouping (C) ensures consistent current amplification across production lots, while its low V_BE(sat) (700–770 mV at I_C = 10 mA) enables efficient base drive in low-voltage logic-level interfaces.

Designed for AF signal paths, it exhibits f_T = 250 MHz (typ.), C_cb = 0.95 pF (typ.), and C_eb = 9 pF (typ.) - parameters critical for stable small-signal gain and bandwidth control in 30 Hz–15 kHz audio band applications without parasitic oscillation.

Key Specifications

Pinout & Package

BC847C is housed in a standard SOT23 plastic surface-mount package (3-pin, 1.3 mm × 2.9 mm × 1.0 mm), optimized for automated placement and reflow soldering on high-density PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose transistor applications.

Compared with BC847BW and MMBT3904LT1G, BC847C offers tighter h_FE grouping (420–520), AEC-Q101 certification, and SOT23 mechanical compatibility - making it optimal for automotive and industrial applications demanding predictable gain and long-term reliability.

Availability

BC847C is available at Aetrix Electronics and suitable for audio preamplifiers, logic-level interface buffers, and automotive door module drivers requiring stable component supply and long-term manufacturing continuity.

Supply support for BC847C 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

Nexperia is a global semiconductor expert focused on essential semiconductors, delivering high-performance, reliable components for automotive, industrial, and consumer markets.

The BC846–BC850 family targets general-purpose analog and switching applications, emphasizing high gain consistency, low saturation voltage, and AEC-Q101 qualification for mission-critical electronics.

FAQ

What is the maximum continuous collector current for BC847C?

The BC847C supports a maximum continuous collector current (I_C) of 100 mA at T_S ≤ 71 °C. At higher case temperatures, derating applies per the P_tot vs. T_S curve - e.g., 50 mA at T_S = 100 °C - due to thermal resistance limitations (R_thJS ≤ 240 K/W).

Is BC847C suitable for switching applications?

Yes - BC847C is optimized for both linear amplification and saturated switching. Its low V_CE(sat) (≤250 mV) and fast transition frequency (f_T = 250 MHz) allow clean turn-on/turn-off in digital interface buffers and low-power load switches up to ~10 MHz.

How does BC847C differ from BC847B?

BC847C has a higher guaranteed h_FE range (420–520 at I_C = 2 mA) versus BC847B (200–450). Both share identical V_CEO, V_CE(sat), and package; the C grade provides tighter gain tolerance for precision analog designs requiring matched transistors.

Does BC847C require a heatsink in typical operation?

No - BC847C's SOT23 package and R_thJS ≤ 240 K/W enable safe operation at up to 100 mA with no heatsink, provided the PCB provides adequate copper area (≥1 cm² thermal pad) and ambient temperature remains ≤71 °C. Forced airflow or heatsinking is unnecessary for standard applications.