Nexperia USA Inc. BCX56-16TX

Overview

BCX56-16TX from Nexperia is an AEC-Q101 qualified NPN power bipolar transistor in SOT89 (SC-62) package, designed for medium-power switching and linear amplification. It delivers 80 V V_CEO, 1 A continuous collector current, 250 h_FE at I_C = 150 mA, and supports peak pulse current up to 2 A - used in automotive-grade low-side switches and MOSFET drivers.

For engineers reviewing the BCX56-16TX datasheet, BCX56-16TX pinout, BCX56-16TX application, or BCX56-16TX equivalent, this page provides verified electrical parameters, thermal derating behavior, junction-to-ambient resistance under three PCB mounting conditions, and validated alternatives for power transistor selection in linear regulators and driver stages.

Technical Context

This NPN transistor operates with open-base V_CEO = 80 V and V_CB0 = 100 V, enabling robust operation in 24 V and 48 V industrial power rails. Its h_FE range of 100–250 at V_CE = 2 V and I_C = 150 mA ensures stable current gain across temperature and bias conditions.

Thermal performance is defined by three R_th(j-a) values: 250 K/W (standard footprint), 157 K/W (1 cm² collector pad), and 114 K/W (6 cm² pad), directly mapping to real-world PCB layout decisions for power dissipation up to 1100 mW at T_amb ≤ 25 °C.

Key Specifications

Pinout & Package

SOT89 (SC-62) plastic surface-mount package: 4.5 mm × 2.5 mm × 1.5 mm body, 1.5 mm lead pitch, single-sided copper FR4 mounting. Collector tab is electrically connected to Pin 2 and serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN power transistor applications.

Compared with BCX56-10TX and ZTX653, BCX56-16TX offers the highest guaranteed h_FE floor (100) in SOT89, enabling smaller base resistors and tighter current control in space-constrained automotive modules - while ZTX653 trades surface-mount convenience for higher voltage margin and serviceability.

Availability

BCX56-16TX is available at Aetrix Electronics and suitable for automotive body control modules, industrial motor drivers, and consumer power adapters requiring stable component supply and AEC-Q101 compliance.

Supply support for BCX56-16TX 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 system functionality - delivering high-performance, reliable discrete, logic, and MOSFET solutions for automotive, industrial, and mobile markets.

The BCX56T series belongs to Nexperia's AEC-Q101 qualified power transistor product line, engineered specifically for robust linear and switching operation in harsh-environment automotive power management and driver circuits.

FAQ

Is BCX56-16TX suitable for automotive applications?

Yes. BCX56-16TX is fully qualified to AEC-Q101 standards, tested for temperature cycling, humidity, mechanical shock, and ESD robustness. Its −55 °C to +150 °C operating range, 80 V V_CEO, and 150 °C max junction temperature meet requirements for under-hood and body electronics.

What is the recommended PCB layout for thermal performance?

For optimal thermal performance, connect Pin 2 (collector) to a ≥6 cm² copper pour using multiple thermal vias. Use the wave soldering footprint (Fig. 17) for mechanical strength, and ensure ≥1.5 mm clearance from adjacent components to avoid hot-spot accumulation.

How does h_FE vary with temperature and current?

h_FE increases with temperature: at I_C = 150 mA, it ranges from ~100 at −55 °C to ~250 at +100 °C (Fig. 5). At fixed temperature, h_FE peaks near 50–100 mA and declines above 500 mA due to high-level injection effects (Fig. 6).

Can BCX56-16TX replace BCX54-16 in existing designs?

No. BCX54-16 is a PNP transistor (complement to BCX53), while BCX56-16TX is NPN. Direct replacement would invert logic polarity and violate biasing requirements. For PNP equivalents, use BCX53-16TX - its pinout matches BCX56-16TX but with emitter and collector swapped.