Infineon Technologies BC846SH6327XTSA1

Overview

BC846SH6327XTSA1 from Infineon Technologies is a dual NPN silicon small-signal transistor array in SOT363 (SC74) package, featuring galvanically isolated transistors with matched h_FE (200–450), V_CEO = 65 V, I_C = 100 mA, and V_CE(sat) ≤ 250 mV at I_C = 10 mA / I_B = 0.5 mA. It is designed for AF input stages and driver applications in automotive and industrial signal conditioning circuits.

For engineers reviewing the BC846SH6327XTSA1 datasheet, BC846SH6327XTSA1 pinout, BC846SH6327XTSA1 application, or BC846SH6327XTSA1 equivalent, key selection criteria include dual-transistor matching tolerance, AEC-Q101 qualification, low saturation voltage under 10 mA drive, thermal resistance R_thJS ≤ 140 K/W, and SOT363 footprint compatibility with space-constrained PCB layouts.

Technical Context

This dual NPN array integrates two electrically isolated transistors on a single die with tightly controlled parameter matching-especially h_FE and V_BE(sat)-enabling balanced push-pull or differential pair operation without external trimming. Its construction supports stable gain across temperature (T_j up to 150 °C) and meets automotive reliability requirements per AEC-Q101.

The device operates with V_CB up to 80 V and V_EB up to 6 V, exhibits f_T = 250 MHz at I_C = 20 mA, and maintains C_cb = 0.95 pF and C_eb = 9 pF at specified bias conditions-making it suitable for high-fidelity audio preamplifier inputs and low-noise switching interfaces.

Key Specifications

Pinout & Package

SOT363 (SC74) surface-mount package with 6-pin lead frame, 1.9 mm × 2.9 mm footprint, 1.1 mm max height, and Pb-free RoHS-compliant finish. Pin 1 marked by dot or bevel edge.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual NPN transistor array applications.

Compared with BC846SH6327XTSA1, BC847BH6327XTSA1 trades voltage headroom for marginal cost reduction, while MBT3904DW1T1G sacrifices AEC-Q101 compliance and gain matching-making the original part optimal for automotive signal integrity and reliability-critical designs.

Availability

BC846SH6327XTSA1 is available at Aetrix Electronics and suitable for automotive door modules, industrial sensor signal conditioners, audio preamplifier input stages, and smart lighting DALI interfaces requiring stable component supply and long-term lifecycle continuity.

Supply support for BC846SH6327XTSA1 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 is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs, with global manufacturing and quality certification infrastructure.

This device belongs to Infineon's BC84xS family of AEC-Q101-qualified dual-transistor arrays, engineered specifically for automotive signal conditioning, driver stages, and redundant sensing interfaces where parameter matching and reliability are critical.

FAQ

What is the maximum junction temperature and how does it affect continuous operation?

The BC846SH6327XTSA1 has a maximum junction temperature (T_j) of 150 °C. At ambient temperatures above 85 °C, derating of total power dissipation (P_tot) is required per the thermal curve in Figure 6 of the datasheet. With R_thJS ≤ 140 K/W, sustained 250 mW operation is only possible if solder-point temperature (T_S) remains ≤ 115 °C-verified using thermal simulation or IR measurement.

Is BC846SH6327XTSA1 pin-compatible with BC847S variants?

Yes-BC846SH6327XTSA1 shares identical SOT363 pinout (E1-B1-C2-E2-B2-C1) and mechanical footprint with BC847S and BC846U variants. However, electrical differences exist: BC846S offers V_CEO = 65 V and higher h_FE minimum (200 vs. 110 for BC847S), so substitution requires verification of voltage and gain margins in the target circuit.

How is "galvanic isolation" implemented between the two transistors?

The two NPN transistors are fabricated on a single silicon die but separated by deep trench or dielectric isolation structures-not just standard p-n junction isolation. This achieves >10⁹ Ω inter-transistor resistance and <0.1 pF coupling capacitance, enabling true signal separation in high-precision differential or feedback applications without substrate-mediated crosstalk.

Does this part support pulse operation beyond its DC power rating?

Yes-the device supports pulsed loads up to P_tot(max)/P_tot(DC) = 10× for pulse widths ≤ 10 ms (duty cycle D ≤ 2%), as shown in Figure 7. This enables short-duration peak current handling (e.g., inductive kickback suppression or burst-mode LED driving) without exceeding thermal limits, provided average power remains within 250 mW.