Infineon Technologies BCV47E6433HTMA1

Overview

BCV47E6433HTMA1 from Infineon Technologies is an NPN silicon Darlington transistor in SOT23 package, rated for 60 V V_CEO, 500 mA continuous collector current, and minimum DC current gain (h_FE) of 2000 at I_C = 100 µA, designed for general-purpose audio-frequency switching and amplification in compact power interface circuits.

For engineers reviewing the BCV47E6433HTMA1 datasheet, BCV47E6433HTMA1 pinout, BCV47E6433HTMA1 application, or BCV47E6433HTMA1 equivalent, this device serves as a high-gain, medium-voltage discrete switch where low base drive current and robust saturation performance (V_CE(sat) ≤ 1 V at I_C = 100 mA, I_B = 0.1 mA) are critical for relay drivers and sensor interface stages.

Technical Context

The BCV47E6433HTMA1 implements a two-stage monolithic NPN Darlington configuration delivering high current gain with integrated emitter degeneration for thermal stability. It operates with V_CEO = 60 V and V_CBO = 80 V, supporting medium-voltage load switching up to 500 mA DC while maintaining safe junction temperature limits (T_j = 150 °C).

Its f_T = 170 MHz (typ.) at I_C = 50 mA enables stable operation in AF bandwidths, and C_cb = 3 pF (typ.) at V_CB = 10 V ensures minimal Miller effect in switching applications requiring fast turn-off response.

Key Specifications

Pinout & Package

BCV47E6433HTMA1 is housed in a standard SOT23 plastic surface-mount package with gull-wing leads and moisture sensitivity level (MSL) 1. Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector - verified per Infineon's official outline drawing and marking layout.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCV47E6433HTMA1, the BCV47,115 offers identical voltage/current ratings but trades off bandwidth and saturation performance, while MMDT3904-7-F lacks Darlington gain entirely-making it unsuitable for low-drive applications unless circuit architecture is revised.

Availability

BCV47E6433HTMA1 is available at Aetrix Electronics and suitable for relay drivers, DC motor interfaces, LED current regulators, and sensor amplifiers requiring stable component supply with AEC-Q101 qualification and RoHS compliance.

Supply support for BCV47E6433HTMA1 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.

The BCV47 series belongs to Infineon's general-purpose bipolar transistor product line, engineered for reliable, high-gain switching in space-constrained industrial and automotive subsystems where low base drive and thermal robustness are essential.

FAQ

Is BCV47E6433HTMA1 AEC-Q101 qualified?

Yes. The BCV47E6433HTMA1 is explicitly qualified per AEC-Q101 standards for automotive-grade reliability, including stress testing for temperature cycling, humidity bias, and mechanical shock. This qualification is documented in Infineon's official product brief and supported by test reports available upon request through authorized distribution channels.

What is the maximum allowable junction temperature?

The absolute maximum junction temperature (T_j) for BCV47E6433HTMA1 is 150 °C, as specified in the Absolute Maximum Ratings table. Operation beyond this limit risks permanent degradation of h_FE and increased leakage. Derating curves in the datasheet show P_tot must be reduced linearly above T_S = 74 °C to maintain safe T_j.

Can BCV47E6433HTMA1 replace BCV27 in existing designs?

No - BCV47E6433HTMA1 is not a direct replacement for BCV27. While both share SOT23 packaging and pinout, BCV27 has V_CEO = 30 V and h_FE ≥ 4000 at I_C = 100 µA, whereas BCV47E6433HTMA1 offers higher voltage rating (60 V) but lower minimum gain at that condition. Substitution requires verification of voltage margin and gain-dependent timing in the target circuit.

Does BCV47E6433HTMA1 require a base resistor in switching applications?

Yes - a base resistor is required to limit I_B and prevent excessive power dissipation in the base-emitter junction. For example, driving from a 5 V MCU GPIO with I_C = 100 mA and h_FE = 2000 implies I_B ≈ 50 µA; a 68 kΩ resistor sets appropriate base current while accounting for V_BE(sat) ≈ 1.5 V. Omitting it risks thermal runaway or premature failure.