NXP BC858 Compact PNP Transistor for Low-Current Switching in SOT-23

The Nexperia (NXP) BC858 is a robust PNP silicon planar transistor, optimized for both switching and amplification in compact, surface-mount electronics. It comes in a durable SOT‑23 (TO‑236AB) package, delivering a professional balance of voltage handling, current capability, and thermal endurance.

Advanced Features and Benefits

• Polarity: PNP silicon, epitaxial planar construction, epoxy‑molded, surface-mount.
• Package Size: SOT‑23 (TO‑236AB) chip, compact and PCB-friendly.
• Voltage Rating: Collector-emitter voltage (VCEO) up to –30 V (BC858B variant).
• Current Rating: Collector current (IC) up to –100 mA; peak currents reach –200 mA.
• Power Dissipation: Up to 250 mW at 25 °C (FR4 board).
• Thermal Limit: Operates from –65 °C to +150 °C (junction/storage).
• Bandwidth & Capacitance: fT ~100 MHz; collector capacitance ~4.5 pF (or ~6 pF variant).
• Noise Performance: Low noise figure between 2–10 dB at VCE = –5 V, IC = –200 μA.
• Automotive Grade: AEC‑Q101 qualified for demanding automotive reliability.

Why Buy this Product?

This transistor excels in tightly spaced electronic systems due to its compact SOT-23 footprint, automotive reliability, and wide thermal tolerance. It is well-suited for signal switching, general-purpose amplification, and noise-critical tasks within industrial, automotive, and consumer electronics.