BC857CW

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BC857CW

TRANS PNP 45V 0.1A SOT323

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사양

Supplier Yangzhou Yangjie Electronic Technology Co.,Ltd
Package Tape & Reel (TR),Cut Tape (CT)
ProductStatus Active
TransistorType PNP
Current-Collector(Ic)(Max) 100 mA
Voltage-CollectorEmitterBreakdown(Max) 45 V
VceSaturation(Max)@IbIc 650mV @ 5mA, 100mA
Current-CollectorCutoff(Max) 100nA (ICBO)
DCCurrentGain(hFE)(Min)@IcVce 420 @ 2mA, 5V
Power-Max 200 mW
Frequency-Transition 100MHz
OperatingTemperature 150°C (TJ)
MountingType Surface Mount
Package/Case SC-70, SOT-323

개요

Description

BC857CW is a PNP general‑purpose small‑signal transistor in the BC857 family. The “CW” suffix indicates the SOT‑23 surface‑mount variant.
- Package: SOT‑23; PNP; complements BC847 (NPN).
- Typical specs (varies by grade): Vceo ≈ -45 V; Ic max ≈ -100 mA; Ptot ≈ 250 mW.
- Gain: hFE depends on grade (A/B/C) and operating point; broad ranges (roughly hundreds at low currents).
- Applications: low‑power amplification and switching, general signal processing.
- Pinout (SOT‑23): usually E‑B‑C from left to right with the flat face toward you; always check the vendor datasheet for the exact pinout.
For exact electrical values and pin configuration, consult the specific BC857CW datasheet from your manufacturer.

Features

BC857CW is a PNP silicon small-signal transistor in an SMD (SOT-23) package. Key features:
- Vceo: 45 V; Ic max: 100 mA
- Ptot (max dissipation): ~250 mW
- Gain group: C (high gain): hFE ≈ 420–800 (typical at Ic = 2 mA)
- Vebo: ~5 V
- Temperature range: −55 to +150 °C (operating); storage −55 to +150 °C
- Low-noise, general-purpose for amplification and switching
- Complement to BC847 family; suitable for biasing, buffering, and small-signal applications
- Package code: CW (SOT-23)

Package

The BC857CW is the SMD version of the BC857 PNP small‑signal transistor, supplied in a 3‑lead SOT‑23 surface‑mount package.

Pinout

BC857CW is a PNP bipolar junction transistor in a 3‑pin SOT package. Pin count: 3. Function: PNP general‑purpose amplifier/switch (signal transistor). Typical pin assignment (verify with the manufacturer datasheet): pin 1 = Base (B), pin 2 = Emitter (E), pin 3 = Collector (C).

Manufacturer

- Manufacturer: Vishay Intertechnology.
- What kind of company: A global manufacturer of electronic components, including semiconductors (transistors, diodes) and passive components (resistors, capacitors, inductors).

Application

BC857CW is a PNP general‑purpose, low‑noise small‑signal transistor in SOT‑23. Typical applications:
- Small-signal amplification in audio, sensors, and instrumentation
- Switching and level‑shifting/buffering in logic and driver circuits
- Pull‑up/pull‑down biasing in low‑current analog stages
- Signal conditioning in consumer electronics, telecom, and hobby projects

Equivalent

Direct equivalents: BC857 (same device), BC857C / BC557C (package/grade variants), and BC557 (through‑hole counterpart). Close substitutes: 2N3906 / MMBT3906 (PNP small‑signal) or BC327 for higher current. Verify VCE, IC, hFE and pinout before substituting.

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