onsemi BC560CBU

Overview

BC560CBU from onsemi is a PNP epitaxial silicon transistor optimized for low-noise amplification and general-purpose switching, with V_CEO = −45 V, h_FE = 420–800 (Class C), f_T = 150 MHz, and V_BE(on) = −600 to −750 mV at I_C = −2 mA - used in audio preamplifier stages and bias networks of linear power supplies.

For engineers reviewing the BC560CBU datasheet, pinout, applications, or equivalent options, key selection criteria include its low-noise figure (1.2–2.0 dB at 1 kHz), TO-92-3 package compatibility, complementary pairing with BC546–BC550 NPN series, and RoHS-compliant Pb-free construction.

Technical Context

The BC560CBU operates as a medium-power PNP bipolar junction transistor with epitaxial base structure enabling high current gain linearity and stable f_T performance up to 150 MHz. Its low noise figure (1.2 dB min) and tight h_FE classification (C: 420–800) support precision analog signal conditioning where gain consistency and minimal thermal drift are required.

Designed for operation at T_J ≤ 150°C with R_JA = 250°C/W, it delivers reliable DC switching and small-signal amplification under V_CE = −5 V, I_C = −2 mA conditions. The device exhibits V_CE(sat) ≤ −300 mV at I_C = −10 mA / I_B = −0.5 mA and Cob = 6 pF at V_CB = −10 V, supporting stable high-frequency biasing in multi-stage amplifier topologies.

Key Specifications

Pinout & Package

BC560CBU is housed in a TO-92-3 plastic package (Case 135AR), with standard leadform orientation: lead 1 = Collector, lead 2 = Base, lead 3 = Emitter - compatible with automated through-hole assembly and manual prototyping.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC559CTA and BC856B, the BC560CBU provides superior noise performance (1.2–2.0 dB) and balanced voltage rating (−45 V), making it optimal for mid-range audio and precision biasing where both signal fidelity and rail flexibility matter.

Availability

BC560CBU is available at Aetrix Electronics and suitable for audio preamplifier stages, linear power supply bias networks, differential pair inputs, and relay/LED switching applications requiring stable component supply, long-term manufacturability, and RoHS-compliant sourcing.

Supply support for BC560CBU 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The BC560CBU belongs to onsemi's legacy general-purpose bipolar transistor family, designed specifically for cost-sensitive, high-reliability analog signal conditioning and discrete switching in consumer and industrial equipment.

FAQ

What is the maximum collector-emitter voltage rating for BC560CBU?

The BC560CBU has a maximum collector-emitter voltage (V_CEO) rating of −45 V at T_A = 25°C. This rating applies under DC conditions and defines the upper limit for safe operation in negative-rail amplifier or switching circuits. Exceeding this voltage risks avalanche breakdown and permanent device degradation. Derating is required above 25°C ambient per the datasheet thermal curve.

Is BC560CBU pin-compatible with BC557 or BC558?

Yes, BC560CBU shares identical TO-92-3 pinout (Collector-Base-Emitter on leads 1-2-3) and mechanical footprint with BC557 and BC558. However, electrical differences exist: BC560CBU offers higher h_FE (Class C), lower noise (1.2–2.0 dB), and same V_CEO = −45 V as BC557, whereas BC558 has V_CEO = −30 V. Direct substitution is electrically valid only if noise and gain requirements align.

Does BC560CBU meet RoHS and lead-free requirements?

Yes, BC560CBU is manufactured by onsemi as a Pb-free, halogen-free/BFR-free device compliant with EU RoHS Directive 2011/65/EU. The TO-92-3 package (Case 135AR) carries no lead content in solderable terminations or mold compound, and full compliance documentation is available via onsemi's product change notifications and material declarations.

What is the typical noise figure of BC560CBU and under what conditions is it measured?

The BC560CBU exhibits a typical noise figure of 1.2 dB, measured at V_CE = −5 V, I_C = −200 µA (not −200 A, which is a datasheet typo), f = 1 kHz, and R_G = 2 kΩ. This value reflects its optimization for low-noise small-signal amplification, particularly in audio front-ends where signal-to-noise ratio directly impacts perceived fidelity.

Can BC560CBU be used as a direct replacement for BC559 in existing designs?

BC560CBU can replace BC559 in many designs due to matching TO-92-3 pinout and overlapping h_FE range (both Class C), but caution is required: BC559 has V_CEO = −30 V and higher max noise (1.2–4.0 dB), while BC560CBU offers −45 V rating and tighter 1.2–2.0 dB NF. Verify voltage headroom and noise budget before substitution - no PCB changes are needed, but system-level validation is recommended.