Infineon Technologies BCX6810H6327XTSA1

Overview

BCX6810H6327XTSA1 from Infineon Technologies is an NPN silicon bipolar junction transistor designed for general-purpose audio-frequency amplification and switching. It delivers 1 A continuous collector current, 50–100 DC current gain (h_FE) at IC = 500 mA / V_CE = 1 V, and a low 0.5 V collector-emitter saturation voltage at IC = 1 A / IB = 100 mA. It is housed in a thermally robust SOT-89 package and qualified to AEC-Q101 for automotive-grade reliability.

For engineers reviewing the BCX6810H6327XTSA1 datasheet, BCX6810H6327XTSA1 pinout, BCX6810H6327XTSA1 application, or BCX6810H6327XTSA1 equivalent, key selection criteria include its V_CEO = 20 V rating, thermal resistance R_thJS ≤ 12 K/W, complementary PNP pairing with BCX69, and suitability for linear/switching operation in space-constrained, thermally demanding circuits.

Technical Context

This transistor operates as a medium-power NPN BJT optimized for audio-frequency signal amplification and low-voltage switching. Its design emphasizes high current capability (IC = 1 A), stable DC gain across operating range, and low V_CE(sat) to minimize conduction losses in driver stages.

It features a complementary PNP counterpart (BCX69), supports pulsed operation up to I_CM = 2 A (tp ≤ 10 ms), and maintains specified h_FE and V_CE(sat) over −65 °C to +150 °C junction temperature range, enabling use in automotive under-hood environments.

Key Specifications

Pinout & Package

BCX6810H6327XTSA1 is supplied in the SOT-89 surface-mount package, featuring three leads with standard pin assignment: Pin 1 = Base (B), Pin 2 = Collector (C), Pin 3 = Emitter (E). The package provides enhanced thermal dissipation (R_thJS ≤ 12 K/W) and mechanical stability for automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BCX6810H6327XTSA1, BCX6816 offers higher gain without sacrificing thermal or voltage ratings, while MMBT4401LT1G trades current capacity and thermal robustness for miniaturization and higher V_CEO, making it unsuitable as a drop-in replacement in power stages.

Availability

BCX6810H6327XTSA1 is available at Aetrix Electronics and suitable for automotive door modules, industrial fan controllers, audio amplifier stages, and DC-DC pre-driver circuits requiring stable component supply, AEC-Q101 qualification, and SOT-89 thermal performance.

Supply support for BCX6810H6327XTSA1 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.

BCX6810H6327XTSA1 belongs to Infineon's BCX68 family of AEC-Q101-qualified NPN transistors engineered for reliable medium-current switching and amplification in harsh-environment automotive and industrial systems.

FAQ

Is BCX6810H6327XTSA1 pin-compatible with BCX6816 or BCX6825?

Yes - all BCX68 variants (including -10, -16, and -25) share identical SOT-89 pinout (Pin 1 = Base, Pin 2 = Collector, Pin 3 = Emitter) and mechanical footprint. Only DC current gain (h_FE) and maximum allowable collector current differ between grades; electrical substitution is permissible if gain and thermal margins align with circuit requirements.

What is the maximum allowable PCB copper area for thermal relief on the collector tab?

The SOT-89 collector tab (Pin 2) must be soldered to ≥ 100 mm² of 2 oz copper on the top layer, connected via ≥ 4 thermal vias (0.3 mm diameter) to inner ground/power planes. This achieves the rated R_thJS ≤ 12 K/W; reducing copper area increases junction temperature and may require derating above 0.7 A continuous current.

Does BCX6810H6327XTSA1 support pulsed operation beyond its 1 A DC rating?

Yes - it supports peak collector current I_CM = 2 A for pulse widths ≤ 10 ms with duty cycle ≤ 2%, provided case temperature remains ≤ 114 °C. Pulse operation must follow the permissible pulse load curve in Infineon's AN077, and transient thermal impedance must be verified for specific PCB layout and pulse profile.

Can BCX6810H6327XTSA1 replace BCX69 in a complementary pair?

No - BCX6810H6327XTSA1 is NPN; BCX69 is its PNP complement. They are not interchangeable. However, BCX6810 and BCX69-10 are matched in voltage/current ratings and gain ranges, enabling symmetrical push-pull or H-bridge designs when used together with appropriate biasing and polarity reversal.