Infineon Technologies BC849BE6327HTSA1

Overview

BC849BE6327HTSA1 from Infineon Technologies is an NPN silicon general-purpose bipolar junction transistor (BJT) designed for audio-frequency input stages and driver circuits. It features a DC current gain (h_FE) of 200–450 at I_C = 2 mA, V_CE = 5 V; V_CEO = 30 V; V_CE(sat) ≤ 250 mV at I_C = 10 mA, I_B = 0.5 mA; and low noise (F = 1.2–4 dB) in the 1 kHz band - enabling high-fidelity signal amplification in compact analog front-ends.

For engineers reviewing the BC849BE6327HTSA1 datasheet, BC849BE6327HTSA1 pinout, BC849BE6327HTSA1 application, or BC849BE6327HTSA1 equivalent, key selection criteria include its AEC-Q101 qualification for automotive use, SOT-23 package compatibility with space-constrained PCB layouts, low V_CE(sat) for efficient switching in driver stages, and verified h_FE group B performance across temperature.

Technical Context

This transistor operates as a linear amplifier or saturated switch in low-voltage analog signal paths. Its h_FE grouping (B: 200–450) ensures predictable current amplification at I_C = 2 mA and I_C = 10 mA, while f_T = 250 MHz supports stable gain up to mid-VHF frequencies. The device meets AEC-Q101 stress testing for automotive under-hood environments.

Thermal design relies on R_thJS ≤ 240 K/W (SOT-23), with P_tot = 330 mW at T_S ≤ 71 °C. Noise performance is specified at I_C = 200 µA, V_CE = 5 V, f = 1 kHz, ∆f = 200 Hz, R_S = 2 kΩ - confirming suitability for low-noise preamplifier nodes.

Key Specifications

Pinout & Package

BC849BE6327HTSA1 is housed in a RoHS-compliant SOT-23 plastic surface-mount package (JEDEC TO-236AB), measuring 2.9 × 1.3 × 1.0 mm with gull-wing leads. Thermal pad is not present; standard reflow profiles apply.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC849BE6327HTSA1, BC849B,115 offers identical gain and footprint but lacks automotive qualification, while MMBT3904LT1G trades guaranteed noise and AEC-Q101 for higher V_CEO and broader h_FE range - making the Infineon part optimal for noise-sensitive, automotive-grade driver stages.

Availability

BC849BE6327HTSA1 is available at Aetrix Electronics and suitable for automotive door modules, industrial PLC analog input cards, VoIP phone audio front-ends, and consumer appliance motor drivers requiring stable component supply, long-term lifecycle support, and AEC-Q101 compliance.

Supply support for BC849BE6327HTSA1 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 sensor solutions, with global manufacturing and quality certifications including IATF 16949.

The BC846–BC850 family targets cost-effective, high-reliability discrete transistors for automotive signal conditioning and industrial control - emphasizing AEC-Q101 qualification, tight h_FE binning, and low-noise performance in SOT-23 packaging.

FAQ

Is BC849BE6327HTSA1 pin-compatible with BC847B or BC848B?

Yes - all three share identical SOT-23 pinout (1=Base, 2=Emitter, 3=Collector) and mechanical footprint. However, BC849B has lower V_CEO (30 V vs. 45 V for BC847B and 30 V for BC848B), so substitution requires verification of maximum collector voltage in the target circuit.

What is the maximum continuous collector current for BC849BE6327HTSA1?

The absolute maximum continuous collector current is 100 mA at T_S ≤ 71 °C. At higher board temperatures, derating applies: at T_S = 100 °C, maximum I_C drops to approximately 65 mA based on the P_tot-vs-T_S curve in the datasheet.

Does BC849BE6327HTSA1 support pulsed operation beyond its DC ratings?

Yes - it supports peak collector currents up to 200 mA for pulse widths ≤ 10 ms (duty cycle ≤ 2%). Pulse capability is validated per JEDEC JESD78, with thermal limits defined by the permissible pulse load curve (P_tot(max)/P_tot(DC) vs. t_p) in the datasheet.

How does the noise performance of BC849BE6327HTSA1 compare to BC850B?

BC849B specifies F = 1.2–4 dB at 1 kHz; BC850B adds equivalent noise voltage (V_n = 0.135 µV, 10–50 Hz), indicating superior ultra-low-frequency noise. For audio-band applications above 100 Hz, both perform similarly; for sub-100 Hz sensor amplification, BC850B is preferred.