Infineon Technologies BCX5616E6433HTMA1

Overview

BCX5616E6433HTMA1 from Infineon Technologies is an NPN silicon bipolar junction transistor designed for audio frequency driver and output stages in linear and switching applications. It features 80 V collector-emitter breakdown voltage (V_(BR)CEO), 1 A continuous collector current (I_C), 0.5 V collector-emitter saturation voltage (V_CE(sat)) at I_C = 500 mA / I_B = 50 mA, and DC current gain (h_FE) of 100–250 at I_C = 150 mA. It is used in automotive body control modules for relay and lamp driving.

For engineers reviewing the BCX5616E6433HTMA1 datasheet, BCX5616E6433HTMA1 pinout, BCX5616E6433HTMA1 application, or BCX5616E6433HTMA1 equivalent, key selection criteria include V_CE(sat) at high I_C, thermal resistance (R_thJS ≤ 15 K/W), AEC-Q101 qualification, SOT-89 package footprint compatibility, and complementary PNP pairing with BCX51–BCX53 series.

Technical Context

This transistor operates as a medium-power NPN switch or linear amplifier with fixed emitter-base and collector-base junction structures optimized for stable h_FE across temperature (−50°C to +150°C) and low V_CE(sat) under high-current drive conditions. Its f_T of 100 MHz supports audio-band signal amplification and fast-switching PWM control up to ~10 kHz without significant phase lag.

The device uses planar epitaxial technology with gold-doped base region to achieve tight parameter distribution and robust thermal performance. Its R_thJS ≤ 15 K/W enables operation at full 2 W dissipation with board-level heatsinking at T_S ≤ 120°C, and it meets AEC-Q101 stress test requirements for automotive under-hood environments.

Key Specifications

Pinout & Package

BCX5616E6433HTMA1 is housed in a surface-mount SOT-89 package with exposed emitter pad for thermal conduction and mechanical stability. The package measures 4.5 mm × 2.5 mm × 1.5 mm and is RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCX5616E6433HTMA1, BCX56-16TA offers identical performance in larger reels for production efficiency, while MMBT5551 trades automotive reliability and current capacity for smaller footprint-making it unsuitable for direct replacement in AEC-Q101 or ≥1 A applications.

Availability

BCX5616E6433HTMA1 is available at Aetrix Electronics and suitable for automotive lighting control, industrial relay interfacing, and audio output stages requiring stable component supply and AEC-Q101 compliance.

Supply support for BCX5616E6433HTMA1 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs and discrete devices.

BCX5616E6433HTMA1 belongs to Infineon's BCX family of AEC-Q101-qualified bipolar transistors engineered for robust, high-current switching in automotive body electronics and industrial actuation systems.

FAQ

Is BCX5616E6433HTMA1 pin-compatible with BCX56-16?

Yes - both share identical SOT-89 pinout (Base–Collector–Emitter on pins 1–2–3), same die, and identical maximum ratings. The suffix "E6433HTMA1" denotes Infineon's specific tape-and-reel packaging and traceability coding; electrical and thermal behavior are fully interchangeable.

What is the maximum allowable junction temperature during continuous operation?

The absolute maximum junction temperature (T_j) is 150°C. For reliable long-term operation, junction temperature should be kept below 130°C using appropriate PCB copper area and ambient thermal management, especially when dissipating >1.2 W continuously.

Does BCX5616E6433HTMA1 require a heatsink in typical 1 A switching applications?

No external heatsink is required if the emitter pad is soldered to ≥250 mm² of 2-oz copper on an inner layer. With that layout, R_thJA drops to ~50 K/W, allowing 1.5 W dissipation at ΔT = 75°C - sufficient for most 1 A pulsed or 0.7 A continuous use cases.

Can BCX5616E6433HTMA1 be used in complementary pair configurations?

Yes - it is explicitly designed to pair with BCX51–BCX53 PNP transistors (e.g., BCX51-16) for Class-B or Class-AB push-pull output stages. Matching h_FE ranges and thermal coefficients ensure balanced conduction and reduced crossover distortion.