Nexperia USA Inc. BC860CW/ZLF

Overview

BC860CW/ZLF from Nexperia is a PNP general-purpose bipolar junction transistor in SOT323 package, rated for −45 V V_CEO, −50 V V_CBO, and −100 mA I_C, with DC current gain (h_FE) of 420–800 at −2 mA/−5 V, optimized for low-noise audio-frequency amplification stages in hi-fi equipment and tape recorders.

For engineers reviewing the BC860CW/ZLF datasheet, BC860CW/ZLF pinout, BC860CW/ZLF application, or BC860CW/ZLF equivalent, key selection criteria include its PNP polarity, SOT323 footprint compatibility, guaranteed h_FE range, low noise figure (4 dB @ 1 kHz), and −45 V collector-emitter breakdown rating for mid-voltage analog signal handling.

Technical Context

This device operates as a medium-gain, low-noise PNP BJT with fixed emitter-base and collector-base junction structures optimized for linear amplification. Its thermal resistance (R_{th j-a}) is 625 K/W on FR4 PCB, and it supports pulse operation up to 200 mA I_CM with f_T = 100 MHz at −10 mA/−5 V.

It features low leakage (ICBO ≤ −15 nA at −30 V, −4 μA at 150 °C), tight V_CEsat (≤ −300 mV @ −10 mA/−0.5 mA), and stable h_FE across −2 mA to −100 mA, enabling predictable biasing in Class-A preamp stages without thermal runaway risk.

Key Specifications

Pinout & Package

SOT323 plastic surface-mount package (2.2 mm × 1.35 mm × 0.95 mm), 3-lead, lead-free and RoHS-compliant (ZLF suffix). Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP general-purpose transistor applications.

Compared with BC860CW/ZLF, BC857BW offers lower cost but reduced gain consistency, while MMBT3906 provides SOT23 compatibility at the expense of noise performance and voltage margin-making BC860CW optimal for new SOT323-based low-noise audio designs.

Availability

BC860CW/ZLF is available at Aetrix Electronics and suitable for audio preamplifiers, tape recorder signal chains, and hi-fi tone control circuits requiring stable component supply, consistent h_FE binning, and RoHS-compliant packaging.

Supply support for BC860CW/ZLF 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

Nexperia is a global leader in discrete, logic, and PowerMOS semiconductors, spun off from NXP in 2017, serving automotive, industrial, computing, and consumer markets with high-volume, high-reliability components.

The BC860CW belongs to Nexperia's BC8xxW series of general-purpose PNP transistors designed specifically for low-noise, low-voltage analog signal conditioning in compact audio and portable electronics.

FAQ

Is BC860CW/ZLF RoHS-compliant and lead-free?

Yes, the ZLF suffix explicitly denotes lead-free and RoHS-compliant construction per EU Directive 2011/65/EU. The device uses matte tin termination and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) requirements for standard reflow processes.

What is the maximum continuous power dissipation for BC860CW/ZLF?

The total power dissipation (P_tot) is 200 mW at T_amb ≤ 25 °C on an FR4 PCB. Derating is required above 25 °C at 1.6 mW/°C, reaching zero dissipation at 150 °C junction temperature, per the datasheet's thermal characteristics table.

Can BC860CW/ZLF replace BC857CW in existing designs?

Yes, with verification: both share SOT323 package and PNP polarity, but BC860CW has higher V_CEO (−45 V vs. −30 V) and wider h_FE range (420–800 vs. 420–800 for BC857CW per latest Nexperia docs). Confirm bias network stability under worst-case h_FE and voltage stress.

Does BC860CW/ZLF support pulsed operation beyond its DC ratings?

Yes - peak collector current (I_CM) is rated at −200 mA with pulse width ≤ 300 μs and duty cycle ≤ 2%, enabling brief overload tolerance in transient signal paths such as click/pop suppression or relay driving, provided average power remains within 200 mW limits.