Infineon Technologies BC 856B E6327

Overview

BC856B E6327 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 dB typical at 1 kHz, 200 Hz bandwidth) in SOT23 package. Used in bias networks, level shifters, and discrete amplifier front-ends.

For engineers reviewing the BC856B E6327 datasheet, BC856B E6327 pinout, BC856B E6327 application, or BC856B E6327 equivalent, key selection criteria include guaranteed h_FE group B performance, AEC-Q101 qualification for automotive use, RoHS-compliant SOT23 packaging, and verified V_CEO = 65 V rating under continuous operation.

Technical Context

This PNP transistor operates with emitter-base forward bias and collector-base reverse bias in common-emitter configuration. Its h_FE group B guarantees minimum DC current gain of 220 at I_C = 2 mA and V_CE = 5 V, and maintains stable gain across –55°C to +150°C junction temperature range.

It exhibits f_T = 250 MHz (typical at I_C = 20 mA, V_CE = 5 V), C_cb = 1.5 pF (typical at V_CB = 10 V), and C_eb = 8 pF (typical at V_EB = 0.5 V), supporting stable small-signal amplification up to mid-VHF without parasitic resonance.

Key Specifications

Pinout & Package

BC856B E6327 is housed in a standard SOT23 plastic surface-mount package (JEDEC TO-236AB), measuring 2.9 mm × 1.3 mm × 1.0 mm, with gull-wing leads optimized for reflow soldering and automated placement.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC856B E6327, BC857B E6327 trades 20 V breakdown headroom for identical gain and noise specs in lower-voltage systems, while MMBT856 sacrifices guaranteed h_FE consistency to meet cost targets-neither offers AEC-Q101 validation.

Availability

BC856B E6327 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input modules, and portable medical sensor designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q101 compliance.

Supply support for BC856B E6327 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 ICs, and discrete devices, with global manufacturing and quality certification to ISO/TS 16949 and IATF 16949.

The BC856x family belongs to Infineon's high-reliability bipolar transistor product line, engineered specifically for automotive signal conditioning and industrial control applications demanding robustness, low noise, and extended temperature operation.

FAQ

Is BC856B E6327 pin-compatible with BC846B?

No. BC856B is a PNP transistor with Base-Emitter-Collector pinout (1-2-3), while BC846B is an NPN device with the same physical SOT23 footprint but reversed polarity. Swapping them without circuit redesign causes immediate reverse-bias failure or no conduction. Always verify pin function-not just package-before substitution.

What is the maximum continuous collector current for BC856B E6327 at 100°C ambient?

At T_A = 100°C, derating applies: P_tot drops to ~180 mW (from 330 mW at 71°C case temp). Using V_CE(sat) ≤ 300 mV, max continuous I_C ≈ 600 mA is theoretically possible-but practical limit is 100 mA due to h_FE degradation and thermal instability beyond that point per datasheet safe operating area curves.

Does BC856B E6327 support pulsed operation beyond its DC ratings?

Yes. With duty cycle D ≤ 2% and pulse width t_p < 300 µs, peak collector current can reach 200 mA and instantaneous power up to 1.2 W, as confirmed by the permissible pulse load graph (EHP00377). This enables use in gated amplifier stages and transient sensor wake-up circuits without thermal saturation.

How does the AEC-Q101 qualification impact BC856B E6327's use in non-automotive applications?

AEC-Q101 qualification ensures enhanced reliability margins-including 1000-hour high-temperature operating life testing and 1000-cycle temperature cycling-making BC856B E6327 especially suitable for industrial equipment with 15+ year service life expectations. Its tighter parametric screening also improves lot-to-lot consistency in medical and aerospace applications where field failure is unacceptable.