Nexperia USA Inc. BC847AQB-QZ

Overview

BC847AQB-Q from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in a DFN1110D-3 (SOT8015) leadless package, rated for 45 V V_CEO, 100 mA I_C, and DC current gain (h_FE) of 110–220 at V_CE = 5 V and I_C = 2 mA. It delivers low V_CE(sat) (≤400 mV at I_C = 100 mA, I_B = 5 mA), 0.5 mm profile, and side-wettable flanks for AOI-compatible solder joint inspection - deployed in automotive body control modules for LED driver switching and sensor signal conditioning.

For engineers reviewing the BC847AQB-Q datasheet, BC847AQB-Q pinout, BC847AQB-Q application, or BC847AQB-Q equivalent, this page provides verified package mapping (SOT8015), terminal roles (Base/Emitter/Collector), thermal derating curves, AEC-Q101 qualification status, and direct alternatives with documented h_FE and saturation voltage differences.

Technical Context

This NPN bipolar junction transistor operates as a linear amplifier or saturated switch in low-power analog and digital circuits. Its h_FE range (110–220) supports predictable biasing in fixed-gain configurations, while its 45 V V_CEO rating enables use in 24 V automotive supply rails with margin. The device exhibits V_BE ≈ 650–770 mV at I_C = 10 mA and shows negative temperature coefficient (~−2 mV/K).

Thermal performance is defined by R_th(j-a) = 368 K/W (35 µm FR4) and 298 K/W (70 µm FR4), with power dissipation derated above 25 °C ambient. Transient thermal impedance data confirms suitability for pulsed loads up to 200 mA (t_p ≤ 1 ms), and C_c = 1.5 pF ensures minimal capacitive loading in high-frequency switching nodes.

Key Specifications

Pinout & Package

DFN1110D-3 (SOT8015) is a 3-terminal, leadless, ultra-thin plastic package with exposed thermal pad not connected internally; dimensions are 1.1 mm × 1.0 mm × 0.48 mm, height 0.5 mm, pitch 0.65 mm, and side-wettable flanks for AOI compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847AQB-Q, BC847BW offers mechanical compatibility with older designs but sacrifices AOI support and thermal efficiency; MMBT3904LT1G provides broader h_FE spread and lower saturation voltage at light loads but lacks automotive qualification and 45 V headroom needed for robust 24 V system design.

Availability

BC847AQB-Q is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor signal conditioning, smart meter load switching, and USB-C power path management requiring stable component supply across extended temperature ranges (−55 °C to 150 °C).

Supply support for BC847AQB-Q 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 efficiency technologies, delivering high-performance, reliable discrete, logic, and MOSFET devices.

BC847AQB-Q belongs to the BC847xQB-Q series - a family of AEC-Q101-qualified, ultra-small-footprint NPN transistors engineered specifically for space-constrained automotive and industrial control applications demanding AOI-compliant assembly and thermal resilience.

FAQ

Is BC847AQB-Q pin-compatible with standard SOT-23 NPN transistors?

No. BC847AQB-Q uses the DFN1110D-3 (SOT8015) leadless package with terminals arranged as Base–Emitter–Collector in a 1.1 mm × 1.0 mm outline and 0.65 mm pitch. It is not mechanically or electrically pin-compatible with SOT-23 (2.1 mm × 1.3 mm, 1.9 mm pitch) or SC-70 packages. PCB layout must follow the exact footprint in Figure 17 of the datasheet.

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 100 mA (single pulse, t_p ≤ 1 ms). For continuous DC operation, I_B must be limited to ensure I_C ≤ 100 mA and junction temperature remains ≤ 150 °C. At I_C = 100 mA and minimum h_FE = 110, required I_B is ≥ 0.91 mA; practical design uses 5 mA to guarantee saturation, well within safe continuous limits.

Does BC847AQB-Q require special reflow profile considerations?

Yes. Due to its leadless DFN construction and side-wettable flanks, BC847AQB-Q requires precise stencil design (0.1 mm thickness recommended), solder paste volume control, and peak reflow temperature ≤ 260 °C per JEDEC J-STD-020. The footprint in Figure 17 specifies 0.34 mm × 0.65 mm solder lands with 0.22 mm solder mask clearance to ensure reliable fillet formation for AOI.

How does h_FE variation affect bias stability in amplifier designs?

With h_FE ranging from 110 to 220, collector current can vary by up to 2× for identical base drive. Stable bias requires emitter degeneration (e.g., 10–100 Ω resistor) or feedback networks. In switching applications, design for worst-case h_FE = 110 ensures sufficient base drive (≥5 mA) to maintain V_CE(sat) ≤ 400 mV at I_C = 100 mA.