Infineon Technologies BC846SE6327BTSA1

Overview

BC846SE6327BTSA1 from Infineon Technologies is a dual NPN silicon small-signal transistor array in SOT-363 (SC74) package, designed for AF input stages and driver applications. It features two galvanically isolated transistors with matched h_FE (min 200 at I_C = 10 µA), V_CEO = 65 V, and low V_CE(sat) of 90 mV (typ) at I_C = 10 mA / I_B = 0.5 mA. Used in automotive audio preamplifier stages requiring stable gain matching and AEC-Q101 qualification.

For engineers reviewing the BC846SE6327BTSA1 datasheet, BC846SE6327BTSA1 pinout, BC846SE6327BTSA1 application, or BC846SE6327BTSA1 equivalent, key selection criteria include dual-transistor matching tolerance, junction temperature rating (T_j = 150 °C), V_CEO/V_CBO voltage margins, thermal resistance (R_thJS ≤ 140 K/W), and RoHS-compliant Pb-free packaging for automotive-grade reliability.

Technical Context

This dual NPN array integrates two electrically isolated transistors on a single die with tightly controlled h_FE spread (200–450 at I_C = 2 mA) and matched V_BE(sat) (660–770 mV). Its f_T = 250 MHz enables stable operation up to mid-VHF range in small-signal amplification.

The device operates under AEC-Q101 stress testing for automotive use, with guaranteed performance across −65 °C to +150 °C storage and junction temperatures. Thermal design relies on R_thJS ≤ 140 K/W and derated P_tot = 250 mW at T_S ≤ 115 °C.

Key Specifications

Pinout & Package

SOT-363 (SC74) surface-mount package with 6-pin lead frame, 0.65 mm pitch, and exposed thermal pad (not electrically connected). Dimensions: 2.1 × 2.0 × 0.9 mm (L × W × H).

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC846SE6327BTSA1, BC847SE6327HTSA1 trades voltage headroom and gain for lower cost, while MBT3904DW1T1G sacrifices automotive qualification and thermal performance for broader distributor availability.

Availability

BC846SE6327BTSA1 is available at Aetrix Electronics and suitable for automotive audio preamplifiers, industrial sensor signal conditioning, and LED driver interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BC846SE6327BTSA1 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 to ISO/TS 16949.

This part belongs to Infineon's BC846S/BC847S family of AEC-Q101-qualified dual NPN transistors, engineered specifically for high-reliability analog signal conditioning in automotive and industrial environments.

FAQ

What is the maximum allowable base current for continuous operation?

The absolute maximum peak base current is 5 mA per transistor, derived from the I_CM = 200 mA rating and minimum h_FE of 200. For continuous DC operation, limit I_B to ≤1 mA to maintain V_CE(sat) ≤ 250 mV and prevent thermal runaway at T_j = 150 °C.

Can BC846SE6327BTSA1 be used in linear amplifier mode with V_CE = 12 V?

Yes - V_CEO = 65 V exceeds 12 V, and the device is characterized for linear operation at V_CE = 5 V. At V_CE = 12 V, h_FE remains ≥180 (per curve EHP00365), and f_T drops only to ~220 MHz, supporting stable Class-A audio amplification.

How does the galvanic isolation affect PCB layout?

Galvanic isolation means no internal substrate connection between transistors, allowing separate ground returns and independent bias networks. Layout must avoid shared emitter traces; each E1/E2 should route directly to its own local ground plane region to preserve isolation integrity and minimize crosstalk.

Is the SOT-363 package compatible with standard reflow profiles?

Yes - the Pb-free SC74 package is qualified for JEDEC J-STD-020D Level 1 moisture sensitivity and withstands peak reflow temperatures up to 260 °C for 30 seconds. Recommended profile uses ramp rate ≤3 °C/s, soak at 150–200 °C for 60–120 s, and time above liquidus (217 °C) of 60–90 s.