Infineon Technologies BCX5310H6327XTSA1

Overview

BCX5310H6327XTSA1 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 = 80 V, I_C = 1 A continuous, V_CE(sat) ≤ 0.5 V at I_C = 500 mA / I_B = 50 mA, h_FE = 63–100 at I_C = 150 mA, and SOT-89 surface-mount package. It is used in automotive lighting drivers and industrial relay interface circuits.

For engineers reviewing the BCX5310H6327XTSA1 datasheet, BCX5310H6327XTSA1 pinout, BCX5310H6327XTSA1 application, or BCX5310H6327XTSA1 equivalent, key selection criteria include guaranteed h_FE range at high I_C, 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 defined DC gain linearity across I_C = 5 mA to 500 mA at V_CE = 2 V. Its f_T = 125 MHz (typ.) supports stable operation up to mid-frequency AF ranges without unintended oscillation.

The device uses epitaxial planar technology with emitter ballasting for current sharing and thermal stability. Its complementary NPN counterparts (BCX54–BCX56) enable matched push-pull stage design, and its SOT-89 package provides direct thermal path to PCB copper for power dissipation up to 2 W at T_S ≤ 120 °C.

Key Specifications

Pinout & Package

SOT-89 package: 3-pin surface-mount plastic case with exposed collector tab for thermal conduction and mechanical anchoring. Pin 1 = Base, Pin 2 = Collector (tab), Pin 3 = Emitter.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCX5310H6327XTSA1, BCX53-16 offers higher gain for reduced base drive burden, while MJD2955T4G trades RF capability and automotive qualification for raw current capacity and thermal mass-making it suitable only in non-automotive, high-current, low-frequency roles.

Availability

BCX5310H6327XTSA1 is available at Aetrix Electronics and suitable for automotive lighting control, industrial relay interface, and audio frequency output stages requiring stable component supply, AEC-Q101 compliance, and SOT-89 thermal performance.

Supply support for BCX5310H6327XTSA1 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 ICs, and discrete devices, with global R&D and manufacturing infrastructure.

The BCX51–BCX53 family belongs to Infineon's general-purpose bipolar transistor product line, engineered for robustness in automotive and industrial signal switching and amplification applications where reliability under thermal and electrical stress is critical.

FAQ

Is BCX5310H6327XTSA1 pin-compatible with BCX53-16?

Yes-both share identical SOT-89 pinout (Base–Collector–Emitter) and mechanical footprint. The difference lies solely in h_FE binning: BCX5310 specifies 63–100, while BCX53-16 guarantees 100–160. No PCB redesign is needed for substitution, but base resistor values may require adjustment to maintain optimal saturation.

What is the maximum allowable PCB copper area for thermal relief with this SOT-89 device?

Infineon's AN077 specifies that a minimum 100 mm² copper pour connected to the collector tab reduces R_thJA to ~120 K/W. For 2 W continuous dissipation at T_A = 70 °C, ≥200 mm² of 2-oz copper with thermal vias is recommended to hold T_J ≤ 130 °C.

Does BCX5310H6327XTSA1 support pulsed operation beyond 1 A?

Yes-peak collector current I_CM is rated at 1.5 A for pulse widths ≤ 10 ms with duty cycle ≤ 2%. The permissible pulse load curve (Fig. 6) shows P_tot(max)/P_tot(DC) = 3.5 at t_p = 1 ms, enabling short-duration 3.5 A surges when thermally managed.

Can this transistor be used in linear regulator pass elements?

No-it lacks safe operating area (SOA) characterization for linear-mode operation. Its SOA is defined only for switching use (V_CE < 1 V in saturation). For linear regulators, Infineon recommends dedicated pass transistors like BDX53C with full SOA curves and second breakdown limits.