Infineon Technologies BCX 51-16 E6327

Overview

BCX51-16 E6327 from Infineon Technologies is a PNP silicon bipolar junction transistor designed for audio-frequency driver and output stages in linear and switching applications. It features V_CEO = 45 V, I_C = 1 A continuous, h_FE = 63–100 at I_C = 150 mA, V_CE(sat) ≤ 0.5 V at I_C = 500 mA / I_B = 50 mA, and SOT-89 surface-mount package. Used in automotive lighting drivers and industrial relay interface circuits.

For engineers reviewing the BCX51-16 E6327 datasheet, BCX51-16 E6327 pinout, BCX51-16 E6327 application, or BCX51-16 E6327 equivalent, key selection criteria include guaranteed h_FE range at high current, low saturation voltage under 500 mA load, thermal resistance (R_thJS ≤ 15 K/W), and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This PNP BJT operates in active, saturation, and cutoff regions with DC current gain specified across three test conditions: h_FE ≥ 63 at I_C = 150 mA (V_CE = 2 V) and ≥ 100 at I_C = 500 mA (V_CE = 2 V) for the -16 variant. Its breakdown ratings-V_(BR)CEO = 45 V, V_(BR)CBO = 45 V, V_(BR)EBO = 5 V-define safe operating limits in grounded-emitter configurations.

Thermal performance is defined by R_thJS ≤ 15 K/W (junction-to-soldering-point), enabling 2 W total power dissipation at T_S ≤ 120 °C. Pulse operation supports I_CM = 1.5 A for t_p ≤ 10 ms with duty cycle-dependent derating per Fig. 6.

Key Specifications

Pinout & Package

BCX51-16 E6327 is housed in a plastic SOT-89 surface-mount package with gull-wing leads, optimized for thermal dissipation on PCBs with copper pour. Pin 1 = Base (B), Pin 2 = Collector (C), Pin 3 = Emitter (E).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCX51-16 E6327, BCX51-16TA offers identical electrical performance but reduced thermal robustness and no automotive qualification, while MMBT5087LT1G trades current capacity and package thermal efficiency for smaller size-making it unsuitable as a direct replacement in power-switching roles.

Availability

BCX51-16 E6327 is available at Aetrix Electronics and suitable for automotive lighting systems, industrial relay interfaces, linear audio output stages, and DC motor control circuits requiring stable component supply and AEC-Q101 compliance.

Supply support for BCX51-16 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 sensor solutions, with global manufacturing and R&D infrastructure.

The BCX51-16 E6327 belongs to Infineon's BCX51–BCX53 family of AEC-Q101-qualified PNP transistors, engineered for robust, thermally efficient switching in automotive and industrial power interface applications.

FAQ

Is BCX51-16 E6327 pin-compatible with BCX52-16 or BCX53-16?

Yes-BCX51-16, BCX52-16, and BCX53-16 share identical SOT-89 pinout (B-C-E) and mechanical footprint. However, they differ in maximum voltage ratings: BCX51-16 has V_CEO = 45 V, BCX52-16 = 60 V, and BCX53-16 = 80 V. Substitution requires verifying voltage margin in the target circuit.

What is the maximum allowable base current for continuous operation?

The absolute maximum rated base current (I_B) is 100 mA per datasheet Section 2. Exceeding this risks metallization failure. For reliable 1 A collector switching, design base current to achieve h_FE-based saturation-typically 5–10 mA for BCX51-16 at I_C = 500 mA, well within safe limits.

Does BCX51-16 E6327 support pulsed operation beyond 1 A?

Yes-peak collector current I_CM = 1.5 A is permitted for pulse widths ≤ 10 ms with duty cycle ≤ 2%, as defined in Section 2. Derating follows Fig. 6: at t_p = 1 ms, permissible peak current rises to ~1.3 A; at t_p = 100 µs, it reaches ~1.45 A.

How does the E6327 suffix affect packaging and marking?

E6327 denotes Infineon's standard tape-and-reel packaging: 1,000 pieces per 180 mm reel, with SOT-89 orientation and top-side laser marking "BCX5116" (no hyphen). The marking layout matches Figure 7 in the datasheet, including date code (YM format) and manufacturer logo.