Infineon Technologies BCX 56-10 E6327

Overview

BCX56-10 E6327 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 a 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, DC current gain (h_FE) of 63–100 at I_C = 150 mA, and operates up to 150 °C junction temperature - used in automotive body control modules and industrial power supply bias circuits.

For engineers reviewing the BCX56-10 E6327 datasheet, BCX56-10 E6327 pinout, BCX56-10 E6327 application, or BCX56-10 E6327 equivalent, key selection criteria include verified V_CE(sat) performance at high I_C, thermal resistance (R_thJS ≤ 15 K/W), AEC-Q101 qualification status, SOT89 package mechanical compatibility, and complementary PNP pairing with BCX52-10.

Technical Context

This NPN BJT operates in active, saturation, and cutoff regions with defined DC gain linearity across I_C = 5 mA to 500 mA at V_CE = 2 V. Its low V_CE(sat) and high I_C rating support efficient current amplification in Class-A/B audio drivers and relay/LED load switches.

The device meets AEC-Q101 stress test requirements for automotive use and exhibits stable h_FE over −50 °C to +100 °C per characterization curves. Thermal derating follows a defined P_tot vs. T_S curve with 2 W maximum at T_S ≤ 120 °C.

Key Specifications

Pinout & Package

BCX56-10 E6327 is housed in a surface-mount SOT89 package with exposed emitter pad for thermal enhancement. The package measures 4.5 mm × 2.5 mm × 1.6 mm and features gull-wing leads compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCX56-10 E6327, the BCX56-16 offers higher gain for reduced base drive overhead, while MMBT5551LT1G trades automotive qualification and thermal robustness for footprint reduction - making BCX56-10 the optimal balance of gain, ruggedness, and qualification for production automotive systems.

Availability

BCX56-10 E6327 is available at Aetrix Electronics and suitable for automotive lighting control, industrial relay drivers, audio output stages, and DC-DC converter bias circuits requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for BCX56-10 E6327 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 BCX54–BCX56 series belongs to Infineon's AEC-Q101-qualified bipolar transistor portfolio, engineered for robust linear and switching operation in automotive body electronics and industrial power interfaces.

FAQ

Is BCX56-10 E6327 pin-compatible with BCX56-16 E6327?

Yes - both share identical SOT89 package outline, pin 1 (Base), pin 2 (Collector), and pin 3 (Emitter) assignments. Mechanical and solder footprint compatibility is guaranteed; only DC current gain (h_FE) differs between the variants.

What is the maximum allowable PCB copper area for thermal relief under the emitter pad?

Infineon recommends ≥100 mm² of 2-oz copper connected to the emitter pad via ≥4 thermal vias (0.3 mm diameter) to achieve R_thJA ≤ 60 K/W. This layout supports full 2 W dissipation at ambient ≤ 70 °C with natural convection.

Does BCX56-10 E6327 support pulsed operation beyond its DC ratings?

Yes - it supports peak collector current I_CM = 1.5 A for pulses ≤10 ms with duty cycle ≤2%, per datasheet Section 2. Pulse derating follows P_totmax/P_totDC curves in Figure 6, requiring strict adherence to t_p and D limits to avoid second breakdown.

Can BCX56-10 E6327 replace BCX55-10 in existing designs?

No - BCX55-10 has V_(BR)CEO = 60 V and V_(BR)CBO = 60 V, whereas BCX56-10 specifies 80 V and 100 V respectively. Substitution may cause premature breakdown in 48 V systems or high-voltage transient conditions unless circuit stress analysis confirms margin.