onsemi BCV72

Overview

BCV72 from ON Semiconductor is an NPN general-purpose bipolar junction transistor (BJT) designed for amplification and switching in low-to-medium current applications. It features a 60 V collector-emitter breakdown voltage, 500 mA DC collector current rating, 200–450 DC current gain at 2 mA/5 V, 0.25 V saturation voltage at 10 mA/0.5 mA drive, and operates across –55 °C to +150 °C. It is commonly used in signal amplification stages of consumer audio preamps and sensor interface circuits.

For engineers reviewing the BCV72 datasheet, pinout, applications, or equivalent options, key selection considerations include its SOT-23 package footprint, V_CEO/V_CBO ratings, h_FE distribution, thermal resistance (357 °C/W), and suitability for discrete amplifier or active load configurations in space-constrained PCB designs.

Technical Context

The BCV72 is a single NPN silicon BJT fabricated using Fairchild's Process 10, optimized for general-purpose linear and switching operation up to 300 mA continuous collector current. Its design emphasizes stable h_FE across temperature and low V_CE(sat) under moderate drive conditions.

It exhibits defined absolute maximum ratings including 80 V V_CBO, 60 V V_CEO, and 5.0 V V_EBO, with thermal performance characterized on a standard FR-4 PCB (40 mm × 40 mm × 1.5 mm). Junction-to-ambient thermal resistance is specified at 357 °C/W, supporting operation up to 150 °C junction temperature.

Key Specifications

Pinout & Package

SOT-23 plastic surface-mount package with 3-pin configuration, marked "K8". Dimensions conform to JEDEC MO-178AA: 2.90 mm × 1.30 mm × 1.00 mm max height. Standard lead-free finish, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN general-purpose amplifier applications.

Compared with BC846B and MMBT3904, the BCV72 offers superior thermal capability (350 mW vs. 250/225 mW) and tighter h_FE distribution (200–450), making it preferable for thermally constrained or precision-biased amplifier designs requiring consistent gain across production lots.

Availability

BCV72 is available at Aetrix Electronics and suitable for audio pre-amplifier stages, sensor signal conditioning circuits, LED driver switches, and logic-level interface designs requiring stable component supply and long-term manufacturability.

Supply support for BCV72 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BCV72 belongs to ON Semiconductor's legacy general-purpose discrete transistor portfolio, originally developed by Fairchild Semiconductor for cost-effective, reliable amplification and switching in non-critical signal-path applications.

FAQ

What is the maximum continuous collector current rating for BCV72?

The BCV72 has a rated DC collector current (I_C) of 500 mA, verified per its Absolute Maximum Ratings table. However, the device is specifically characterized for general-purpose applications up to 300 mA continuous operation, as noted in its functional description. Actual usable current depends on PCB layout, ambient temperature, and thermal derating-designers must ensure junction temperature remains ≤150 °C using the 357 °C/W R_θJA value. The BCV72 datasheet specifies 300 mA as the recommended upper limit for stable long-term performance.

Does BCV72 have a documented pinout for SOT-23 package?

Yes, the BCV72 uses standard SOT-23 pinout: Pin 1 is Base, Pin 2 is Emitter, Pin 3 is Collector-confirmed in the official ON Semiconductor datasheet (Rev. A, April 2004) and marked "K8" on the package. This matches JEDEC MO-178AA mechanical outline and is electrically validated for common-emitter, common-base, and emitter-follower configurations. No alternate pin assignments or variants exist for this part number.

What is the typical DC current gain (h_FE) range for BCV72 at 2 mA collector current?

The BCV72 exhibits a minimum h_FE of 200 and a maximum of 450 when tested at I_C = 2.0 mA and V_CE = 5.0 V, as specified in its Electrical Characteristics table. This wide but controlled gain range allows predictable biasing in amplifier designs while accommodating process variation. Unlike some transistors with binned h_FE, the BCV72 is sold as a single grade-designers should use worst-case (200) for saturation analysis and typical (300–350) for AC gain estimation.

Can BCV72 be used in automotive under-hood applications?

Yes, the BCV72 supports junction temperatures from –55 °C to +150 °C and is qualified for industrial-grade operation. While not AEC-Q101 certified, its thermal and voltage ratings (60 V V_CEO, 80 V V_CBO) align with many non-safety-critical under-hood functions-such as cabin temperature sensor interfaces or HVAC actuator drivers-provided board-level thermal design maintains T_J ≤150 °C. System-level qualification remains the customer's responsibility.

Is BCV72 RoHS-compliant and lead-free?

Yes, the BCV72 is manufactured with lead-free terminations and complies with RoHS Directive 2011/65/EU. Its SOT-23 package uses matte tin plating over copper leadframe, confirmed in ON Semiconductor's material declarations and packaging specifications. No exemptions apply, and the device is suitable for use in consumer, industrial, and medical electronics where RoHS compliance is mandatory.