Diodes Incorporated BC847AQ-7-F

Overview

BC847AQ-7-F from Diodes Incorporated is an NPN small-signal transistor in SOT23 package, rated for V_CEO = 45 V, I_C = 100 mA, and h_FE = 200–450 (at I_C = 2 mA), optimized for switching and audio-frequency amplification in space-constrained consumer and industrial PCBs.

For engineers reviewing the BC847AQ-7-F datasheet, BC847AQ-7-F pinout, BC847AQ-7-F application, or BC847AQ-7-F equivalent, this page delivers verified electrical parameters, validated SOT23 terminal mapping, automotive-grade reliability data, and direct substitution guidance for discrete BJT selection in low-voltage analog and digital interface stages.

Technical Context

This NPN bipolar junction transistor operates with a typical transition frequency f_T of 300 MHz at V_CE = 5 V and I_C = 10 mA, supporting high-speed switching up to ~10 MHz and low-noise amplification (NF = 2–10 dB) in 1 kHz–100 kHz AF bands. Its V_BE(on) = 660 mV (typ.) and V_CE(sat) = 90 mV (typ. at I_C = 10 mA/I_B = 0.5 mA) enable efficient drive in logic-level interfacing and load control.

The device complies with AEC-Q101 stress-test requirements (as indicated by "Q" suffix), features halogen- and antimony-free green molding compound (UL 94V-0), and exhibits ESD robustness of 4 kV HBM - making it suitable for automotive body electronics and industrial control modules where thermal stability (T_J = –65°C to +150°C) and long-term solderability are critical.

Key Specifications

Pinout & Package

BC847AQ-7-F is housed in a standard SOT23 plastic surface-mount package (JEDEC TO-236AB), measuring 2.90 mm × 1.30 mm × 1.03 mm (L × W × H), with matte tin-plated leads compliant with MIL-STD-202 Method 208 solderability requirements.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847B-7-F and MMBT3904-7-F, BC847AQ-7-F uniquely delivers AEC-Q101 validation, 4 kV HBM ESD, and halogen-free green packaging - essential for Tier-1 automotive suppliers and industrial OEMs requiring full compliance documentation and extended temperature reliability.

Availability

BC847AQ-7-F is available at Aetrix Electronics and suitable for automotive interior lighting, industrial sensor signal conditioning, and smart home relay interface applications requiring stable component supply, full RoHS 3 compliance, and AEC-Q101 traceability.

Supply support for BC847AQ-7-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, specializing in high-reliability components for automotive, industrial, and consumer markets.

BC847AQ-7-F belongs to Diodes' AEC-Q101-qualified small-signal transistor portfolio, engineered specifically for automotive body electronics and industrial control systems demanding extended temperature operation and green material compliance.

FAQ

Is BC847AQ-7-F pin-compatible with BC847B-7-F?

Yes - both use identical SOT23 package with Collector/Base/Emitter pinout (pin 3/2/1). Mechanical and soldering footprint match exactly, enabling physical replacement without PCB redesign. However, BC847AQ-7-F adds AEC-Q101 qualification and guaranteed 4 kV HBM ESD performance not documented for the B-grade part.

What does the "Q" suffix signify in BC847AQ-7-F?

The "Q" denotes AEC-Q101 qualification per the Automotive Electronics Council standard, confirming the device has passed stress tests for temperature cycling, humidity bias, mechanical shock, and ESD. It also signals compliance with automotive-specific material requirements, including halogen-free green packaging and traceable lot control.

Can BC847AQ-7-F replace BC847C-7-F in high-gain amplifier designs?

No - BC847C-7-F has h_FE = 420–800, while BC847AQ-7-F is B-grade (200–450). Substituting may cause gain shortfall or bias instability in circuits relying on minimum h_FE ≥ 420. Use only if design accommodates lower gain margin or includes feedback compensation.

Does BC847AQ-7-F require derating above 25°C ambient?

Yes - its maximum power dissipation drops linearly from 350 mW at 25°C to zero at 150°C, with a derating factor of 3.5 mW/°C above 25°C (per R_θJA = 357°C/W on 15 mm × 15 mm copper). At 85°C ambient, max usable power is ~140 mW for continuous operation.