Infineon Technologies BC857BE6327HTSA1

Overview

BC857BE6327HTSA1 from Infineon Technologies is a PNP silicon small-signal transistor designed for audio-frequency input stages and driver circuits. It delivers high DC current gain (h_FE = 220–480 at I_C = 2 mA), low V_CE(sat) (max 300 mV at I_C = 10 mA/I_B = 0.5 mA), and low noise (1–4 dB at 1 kHz), making it suitable for low-noise preamplifier and level-shifting applications in automotive and industrial control modules.

For engineers reviewing the BC857BE6327HTSA1 datasheet, BC857BE6327HTSA1 pinout, BC857BE6327HTSA1 application, or BC857BE6327HTSA1 equivalent, key selection criteria include verified h_FE grouping (B), AEC-Q101 qualification, SOT-23 package thermal resistance (R_thJS ≤ 240 K/W), and complementary NPN pairing with BC847B.

Technical Context

This transistor operates as a linear amplifying device with fixed emitter-base and collector-base junctions optimized for stable DC biasing and low-distortion AC signal handling. Its h_FE grouping (B) guarantees 220–480 gain at I_C = 2 mA/V_CE = 5 V, and its f_T of 250 MHz supports wideband AF response up to 15 kHz with minimal phase shift.

Designed for operation under ambient temperatures from –65 °C to 150 °C, it maintains specified V_CE(sat) ≤ 300 mV and V_BE(sat) ≤ 850 mV across its full rated I_C range (100 mA continuous, 200 mA peak), with thermal derating defined for T_S ≤ 71 °C (P_tot = 330 mW).

Key Specifications

Pinout & Package

BC857BE6327HTSA1 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 optimized for reflow soldering and automated pick-and-place.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal transistor applications.

Compared with BC857B,215 and MMBT3906LT1G, BC857BE6327HTSA1 offers superior thermal resistance, tighter h_FE grouping, and mandatory AEC-Q101 validation-making it the only option qualified for safety-critical automotive signal conditioning where long-term parametric drift must be bounded.

Availability

BC857BE6327HTSA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor signal chains, and audio preamplifier stages requiring stable component supply and long-term manufacturing continuity.

Supply support for BC857BE6327HTSA1 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.

BC857BE6327HTSA1 belongs to Infineon's BC856–BC860 family of AEC-Q101-qualified PNP transistors, engineered specifically for robust, low-noise signal amplification and switching in harsh-environment automotive and industrial applications.

FAQ

Is BC857BE6327HTSA1 pin-compatible with BC847B?

No-BC857BE6327HTSA1 is a PNP transistor with E-B-C pinout (1=Emitter, 2=Base, 3=Collector), while BC847B is an NPN with C-B-E pinout (1=Collector, 2=Base, 3=Emitter). Physical insertion into the same footprint will reverse polarity and cause circuit failure unless board layout accounts for complementary topology.

What is the maximum allowable junction temperature during continuous operation?

The absolute maximum junction temperature (T_j) is 150 °C. Under continuous DC conditions, this corresponds to a maximum case temperature (T_S) of 71 °C at full 330 mW power dissipation, per the R_thJS ≤ 240 K/W thermal specification. Exceeding T_S = 71 °C requires proportional derating per the P_tot vs. T_S curve in the datasheet.

Does BC857BE6327HTSA1 support pulsed operation beyond its DC ratings?

Yes-pulse operation up to 200 mA peak is permitted with duty cycle D ≤ 2% and pulse width t_p < 300 µs, as validated by the "Permissible Pulse Load" graph. At D = 0.02, P_tot(max)/P_tot(DC) reaches 5×, enabling short-duration surge handling in motor driver enable circuits.

How does the "B" suffix in BC857BE6327HTSA1 relate to h_FE performance?

The "B" denotes h_FE group B, specifying a guaranteed DC current gain range of 220–480 at I_C = 2 mA and V_CE = 5 V. This tight binning enables predictable bias point setting in discrete amplifier designs and eliminates post-manufacturing gain sorting for production assemblies.