Infineon Technologies BCX5616H6327XTSA1

Overview

BCX5616H6327XTSA1 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 V_CEO = 80 V, I_C = 1 A continuous, V_CE(sat) ≤ 0.5 V at I_C = 500 mA / I_B = 50 mA, h_FE = 100–250 (at I_C = 150 mA), and operates up to T_j = 150 °C in SOT-89 package. It is used in automotive body control modules for relay and lamp driving.

For engineers reviewing the BCX5616H6327XTSA1 datasheet, BCX5616H6327XTSA1 pinout, BCX5616H6327XTSA1 application, or BCX5616H6327XTSA1 equivalent, key selection criteria include collector-emitter breakdown voltage, DC current gain linearity across I_C, saturation voltage under high-current switching, thermal resistance R_thJS ≤ 15 K/W, and AEC-Q101 qualification for automotive use.

Technical Context

This transistor operates as a medium-power NPN switch or linear amplifier with fixed emitter-base and collector-base junction structures. Its h_FE range (100–250) supports stable biasing in Class-A/B audio drivers and load-switching circuits where predictable current gain is required over I_C = 5 mA to 500 mA.

The device exhibits low V_CE(sat) (≤ 0.5 V) at I_C/I_B = 10, enabling efficient power delivery in 12 V automotive loads. Its f_T = 100 MHz ensures adequate bandwidth for AF signal amplification and fast switching in PWM-controlled solenoids and LED arrays.

Key Specifications

Pinout & Package

SOT-89 package: surface-mount, 3-pin, single-ended heatsink tab (pin 2), JEDEC-compliant outline with 2.5 mm × 4.5 mm footprint and 1.6 mm height. Tab is electrically connected to collector.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCX5616H6327XTSA1, BCX56-16TA offers identical performance in alternate packaging, while MJD122G trades gain stability for higher voltage/current capability and larger footprint-making it appropriate only when the original's 80 V/1 A limits are exceeded.

Availability

BCX5616H6327XTSA1 is available at Aetrix Electronics and suitable for automotive lamp control, industrial relay interfacing, and audio output stages requiring stable component supply with AEC-Q101 compliance and RoHS certification.

Supply support for BCX5616H6327XTSA1 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.

BCX5616H6327XTSA1 belongs to Infineon's BCX family of general-purpose bipolar transistors engineered for robust, cost-effective switching and amplification in automotive and industrial environments.

FAQ

Is BCX5616H6327XTSA1 pin-compatible with BCX54 or BCX55 variants?

Yes-BCX5616H6327XTSA1 shares identical SOT-89 pinout (E-C-B) and mechanical footprint with BCX54 and BCX55 series. However, V_CEO (80 V), V_CB0 (100 V), and h_FE range differ; substitution requires verification of voltage margin and gain requirements in the target circuit.

What is the maximum allowable base current for continuous operation?

The absolute maximum rated base current is I_B = 100 mA, but for reliable long-term operation at I_C = 1 A, design practice limits I_B to ≤ 100 mA with duty cycle < 50% or ≤ 50 mA for DC operation to avoid bond wire overheating and h_FE degradation.

Does this transistor require a heatsink in 2 W dissipation scenarios?

At P_tot = 2 W and T_S ≤ 120 °C, R_thJS ≤ 15 K/W implies ≤30 K junction-to-solder-point rise. With proper copper pour (≥2 cm² 2 oz Cu) under the tab, no external heatsink is required-however, airflow or board-level thermal vias are recommended for sustained 2 W operation above 85 °C ambient.

Can BCX5616H6327XTSA1 be used in linear regulator pass transistor applications?

Yes-it is suitable as a series pass element in adjustable linear regulators up to 80 V input, provided V_CE remains within safe operating area (SOA). Derating is required above 500 mA due to second breakdown limits; thermal shutdown must be implemented if T_j exceeds 150 °C.