Nexperia USA Inc. BC860CW,135

Overview

BC860CW,135 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 I_C = −2 mA, used in low-noise audio preamplifier stages and signal switching circuits.

For engineers reviewing the BC860CW,135 datasheet, BC860CW,135 pinout, BC860CW,135 application, or BC860CW,135 equivalent, key selection criteria include its high h_FE range, low V_CE(sat) (≤ −300 mV @ −10 mA/−0.5 mA), noise figure (4 dB @ 1 kHz), SOT323 footprint compatibility, and PNP polarity for complementary circuit design.

Technical Context

This device operates as a medium-gain, low-power PNP BJT optimized for linear amplification and switching in ambient temperatures up to +150 °C. Its thermal resistance (R_{th j-a}) is 625 K/W on FR4 PCB, and it exhibits low collector cut-off current (I_CBO ≤ −15 nA @ −30 V, 25 °C).

It features a transition frequency f_T of 100 MHz, emitter capacitance C_e of 10 pF, and base-emitter voltage V_BE of 600–750 mV at −2 mA, supporting stable biasing in low-voltage analog front-ends.

Key Specifications

Pinout & Package

SOT323 (SC-70) plastic surface-mount package: 3-terminal, 1.3 mm × 1.8 mm footprint, 0.65 mm pitch, 0.9 mm max height, optimized for space-constrained consumer and portable audio PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC860B,115 and MMBT3906LT1G, BC860CW,135 delivers superior noise performance and higher gain consistency in SOT323 footprint-critical for miniaturized audio and portable analog signal chains where layout area and SNR are constrained.

Availability

BC860CW,135 is available at Aetrix Electronics and suitable for audio preamplifiers, tape recorder playback circuits, and low-voltage signal switches requiring stable component supply and consistent parametric binning.

Supply support for BC860CW,135 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, serving automotive, industrial, computing, and consumer markets with high-volume, high-reliability components.

BC860CW,135 belongs to Nexperia's general-purpose bipolar transistor product line, engineered for cost-effective, high-yield analog signal conditioning and switching in space- and power-constrained consumer electronics.

FAQ

Is BC860CW,135 RoHS compliant and lead-free?

Yes. BC860CW,135 is manufactured by Nexperia in compliance with RoHS Directive 2011/65/EU and is lead-free, with homogeneous lead content below 0.1 wt%. The SOT323 package uses matte tin (Sn) termination and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL1) requirements.

What is the maximum continuous collector current at 85 °C ambient?

At T_amb = 85 °C, the maximum continuous collector current is derated to approximately −60 mA, based on the 200 mW total power dissipation limit and 625 K/W thermal resistance. This assumes no heatsinking and standard FR4 PCB mounting per datasheet note 1.

Can BC860CW,135 replace BC857W in existing designs?

No-BC857W has V_CEO = −45 V but h_FE = 125–475 and different marking (4A∗). BC860CW,135 offers higher gain (420–800) and tighter binning, which may cause bias shift or instability in circuits designed for BC857W's lower h_FE range without recalculating base resistors.

Does BC860CW,135 support pulsed operation beyond 200 mA?

Yes-peak collector current I_CM is rated at −200 mA for pulse widths ≤ 300 μs and duty cycle ≤ 2%, per IEC 134 limiting values. Exceeding these conditions risks secondary breakdown or permanent parameter shift, even with adequate average power dissipation.