Infineon Technologies BC857BL3E6327XTMA1

Overview

BC857BL3E6327XTMA1 from Infineon Technologies is a PNP silicon small-signal transistor optimized for audio-frequency input stages and driver circuits. It delivers high DC current gain (h_FE = 250–475 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), making it suitable for low-distortion preamplifier and level-shifting applications in automotive and industrial control modules.

For engineers reviewing the BC857BL3E6327XTMA1 datasheet, BC857BL3E6327XTMA1 pinout, BC857BL3E6327XTMA1 application, or BC857BL3E6327XTMA1 equivalent, key selection criteria include its AEC-Q101 qualification, SOT23-3 package thermal resistance (R_thJS ≤ 60 K/W), complementary NPN pairing with BC847B/BC847C, and guaranteed h_FE grouping across production lots.

Technical Context

This device operates as a linear PNP bipolar junction transistor with fixed emitter-base and collector-base junctions. Its design emphasizes stable h_FE over temperature (±15% variation from −55°C to 125°C) and low base-emitter on-voltage (V_BE(ON) = 650–750 mV at I_C = 2 mA), enabling predictable biasing in discrete amplifier topologies.

It supports continuous collector currents up to 100 mA and pulsed operation up to 200 mA, with maximum V_CEO = 45 V and V_CBO = 50 V. The BC857BL3 variant uses a TSLP-3-1 package with enhanced thermal performance versus standard SOT23, verified by R_thJS ≤ 60 K/W at T_S ≤ 135°C.

Key Specifications

Pinout & Package

BC857BL3E6327XTMA1 is housed in a TSLP-3-1 surface-mount package (2.1 × 1.3 × 0.9 mm), optimized for thermal performance and board space efficiency in high-density designs.

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, BC857BL3E6327XTMA1 provides superior thermal management (R_thJS ≤ 60 K/W), tighter h_FE spread, and automotive qualification-making it the preferred choice for thermally constrained, high-reliability applications requiring long-term parametric stability.

Availability

BC857BL3E6327XTMA1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, medical sensor interfaces, and audio signal conditioning requiring stable component supply and AEC-Q101 compliance.

Supply support for BC857BL3E6327XTMA1 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 BC856–BC860 family targets high-reliability analog signal conditioning and discrete switching in automotive and industrial environments, emphasizing thermal robustness, parametric consistency, and qualification to AEC-Q101 standards.

FAQ

What is the maximum continuous collector current for BC857BL3E6327XTMA1?

The absolute maximum continuous collector current is 100 mA at T_S ≤ 135°C. Derating is required above this temperature: power dissipation drops linearly to zero at 150°C junction temperature. Pulse operation up to 200 mA is permitted with duty cycle ≤ 2% and pulse width < 300 µs, per the permissible pulse load curve in the datasheet.

Is BC857BL3E6327XTMA1 pin-compatible with standard SOT23 PNP transistors?

No-it uses the TSLP-3-1 package (2.1 × 1.3 × 0.9 mm), which has identical pinout (Emitter-Base-Collector on pins 1–2–3) but smaller footprint and thinner profile than standard SOT23. Pad layout must follow Infineon's recommended land pattern (0.45 mm pad width, 0.8 mm length, 0.65 mm pitch), not generic SOT23 templates.

Does BC857BL3E6327XTMA1 require external bias stabilization in linear amplifier applications?

Yes-its h_FE varies with temperature and collector current. Stable DC bias requires emitter degeneration (e.g., 10–100 Ω resistor) and/or voltage-divider base bias with bypassed emitter capacitor. The datasheet provides h_FE vs. I_C curves and V_BE vs. I_C data to support accurate quiescent point calculation across operating conditions.

How does the noise performance of BC857BL3E6327XTMA1 compare to BC847B NPN counterparts?

At 1 kHz and 200 Hz bandwidth, BC857BL3E6327XTMA1 achieves 1 dB typical noise figure-identical to BC847B under matched conditions (I_C = 0.2 mA, R_S = 2 kΩ). Both share the same epitaxial base process and low-noise optimization, enabling balanced differential pair designs without noise asymmetry penalties.