Nexperia USA Inc. BC847W-QX

Overview

BC847W-Q from Nexperia is an AEC-Q101-qualified NPN general-purpose transistor in SOT323 (SC-70) package, rated for 45 V V_CEO, 100 mA I_C, and DC current gain (h_FE) spanning 110–800 at V_CE = 5 V and I_C = 2 mA. It serves as a compact, automotive-grade switching and amplification device in space-constrained PCBs for signal-level control and load interface.

For engineers reviewing the BC847W-Q datasheet, BC847W-Q pinout, BC847W-Q application, or BC847W-Q equivalent, key selection considerations include its SOT323 thermal resistance (625 K/W), V_CE(sat) ≤ 400 mV at I_C = 100 mA / I_B = 5 mA, AEC-Q101 qualification, and three gain-bin variants (W/AW/BW/CW) enabling precise biasing in analog and digital circuits.

Technical Context

This transistor operates as a single-element NPN bipolar junction device with base-controlled current amplification. Its design supports linear amplification (h_FE-driven bias networks) and saturated switching (IC/IB = 20 typical), with V_BE(sat) ≤ 900 mV and V_CE(sat) ≤ 400 mV under pulsed 100 mA conditions.

Thermal performance is defined for FR4 PCB mounting (single-sided copper, tin-plated, standard footprint), delivering R_th(j-a) = 625 K/W and T_j(max) = 150 °C. Absolute maximum ratings include V_CBO = 50 V, V_EBO = 6 V, and P_tot = 200 mW at T_amb ≤ 25 °C.

Key Specifications

Pinout & Package

SOT323 (SC-70) surface-mount plastic package: 1.35 mm × 1.75 mm footprint, 0.95 mm height, 3-terminal leadframe with gull-wing terminations. Optimized for reflow soldering per IPC-J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC847C-Q and MMBT3904LT1G, BC847W-Q uniquely balances wide h_FE tolerance, AEC-Q101 compliance, and ultra-compact SOT323 packaging-making it optimal for automotive and space-constrained industrial switching where gain flexibility and qualification are jointly required.

Availability

BC847W-Q is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor interfaces, and consumer power management systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BC847W-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 high-volume, high-reliability essential semiconductors - delivering discrete, logic, and MOSFET solutions optimized for automotive, industrial, and mobile markets.

The BC847xW-Q series belongs to Nexperia's AEC-Q101-qualified general-purpose transistor portfolio, engineered specifically for robust, space-efficient switching and amplification in harsh-environment automotive electronics.

FAQ

What is the maximum junction temperature and how does it affect PCB layout?

The BC847W-Q has a maximum junction temperature (T_j) of 150 °C. To maintain safe operation, PCB layout must follow Nexperia's recommended SOT323 footprint (2.65 mm × 2.35 mm solder lands, 0.55 mm paste apertures) on FR4 with single-sided copper. Thermal resistance is 625 K/W - at 100 mW dissipation, ambient must stay below 87.5 °C to avoid exceeding T_j.

How does the W-suffix differ from AW/BW/CW variants in practical circuit design?

The "W" suffix denotes the broadest h_FE bin (110–800), offering maximum flexibility for cost-sensitive designs where gain variation is managed via feedback or tolerance analysis. In contrast, AW (110–220), BW (200–450), and CW (420–800) enable tighter bias point control - e.g., CW is preferred for current mirrors requiring matched h_FE, while W suits simple on/off switching where exact gain is irrelevant.

Can BC847W-Q replace BC847B in non-automotive applications?

Yes - BC847W-Q shares identical electrical specifications (V_CEO, I_C, h_FE min/max, V_CE(sat)) with BC847B but adds AEC-Q101 qualification and tighter process controls. In non-automotive use, it provides enhanced reliability and longer-lifecycle assurance without design changes; however, its higher qualification cost may not be justified unless long-term supply stability or extended temperature margin is required.

What is the significance of the "Q" suffix in BC847W-Q?

The "Q" suffix indicates Nexperia's automotive-grade product line, meaning the device is manufactured and tested per AEC-Q101 standards - including stress tests for temperature cycling, humidity, mechanical shock, and ESD. It also implies traceable lot documentation, extended temperature screening (−55 °C to +150 °C), and controlled manufacturing flow - distinguishing it from commercial-grade BC847W parts lacking these qualifications.