Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Transistors > Bipolar (BJT) > Single Bipolar Transistors

onsemi BCW60D

Name: BCW60D
Brand: onsemi
SKU: BCW60D
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BCW60D

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: BCW60D.pdf

Description:: TRANS NPN 32V 0.1A SOT-23-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:9,291

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

BCW60D from Fairchild Semiconductor is an NPN epitaxial silicon general-purpose transistor in SOT-23 package, rated for 32 V V_CEO, 100 mA I_C, and 350 mW P_C, with h_FE = 100–220 at I_C = 2 mA and f_T = 125 MHz - used in low-power signal amplification and switching circuits in consumer audio and portable instrumentation.

For engineers reviewing the BCW60D datasheet, pinout, applications, or equivalent options, key selection considerations include its guaranteed h_FE range (100–220), low V_CE(sat) (0.35 V @ I_C=10 mA), SOT-23 footprint compatibility, noise figure (6 dB), and turn-off time (800 ns) in discrete amplifier and interface driver designs.

Technical Context

The BCW60D operates as a medium-speed, low-noise NPN bipolar junction transistor optimized for linear amplification and digital switching in battery-powered systems. Its f_T of 125 MHz and Cob of 4.5 pF support stable operation up to mid-VHF frequencies, while its V_BE(on) of 0.55–0.75 V enables reliable biasing with standard CMOS/TTL logic levels.

Designed for single-supply operation, it features low saturation voltages (V_CE(sat) = 0.35 V, V_BE(sat) = 0.6–0.85 V) and tight h_FE binning (100–220), making it suitable for current-source loads, emitter followers, and level-shifting stages where gain consistency and thermal stability are required.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	32 V - supports rail-to-rail operation in 24 V and lower logic/linear supply domains
I_C	100 mA - sufficient for driving small relays, LEDs, or pre-driver stages without heatsinking
h_FE	100–220 @ I_C = 2 mA - ensures predictable DC gain in bias networks and analog amplifiers
f_T	125 MHz - enables use in RF front-end buffers and broadband audio preamps up to ~20 MHz
V_CE(sat)	0.35 V @ I_C = 10 mA - minimizes conduction loss in low-voltage switching applications
NF	6 dB @ I_C = 0.2 mA - suitable for low-level signal amplification in microphone and sensor interfaces
t_OFF	800 ns - compatible with 100 kHz–1 MHz PWM control in power management ICs

Pinout & Package

SOT-23 plastic surface-mount package with gull-wing leads; 1.3 mm × 2.9 mm footprint, 1.1 mm height, and JEDEC-compliant thermal profile for reflow soldering.

Pin/Terminal	Circuit Role	Design Meaning
1	Base	Control terminal for forward-biased junction; requires current-limited drive (e.g., 0.25–1.25 mA) to achieve specified V_CE(sat)
2	Emitter	Common reference node; tied to ground or negative rail in common-emitter configurations
3	Collector	Output current sink; connects to load or next-stage input; handles up to 100 mA continuous DC current

Key Features

Feature	Design Value
Low-noise amplification	6 dB noise figure at 1 kHz enables clean signal conditioning in sensor front-ends
High f_T bandwidth	125 MHz transition frequency supports stable gain in audio and IF amplifier stages
Guaranteed h_FE binning	100–220 range eliminates need for external gain trimming in production circuits
Fast switching capability	800 ns turn-off time allows use in 100+ kHz pulse-width modulation and timing circuits
Low V_BE(sat)	0.6–0.85 V ensures reliable turn-on with 3.3 V or 5 V microcontroller GPIO outputs

Applications

Audio Pre-amplifier Stage	Microcontroller Interface Driver
Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors before ADC sampling. IC Role / Device Role / Timing Role: NPN common-emitter amplifier with fixed bias network and emitter degeneration resistor. Use Value: 6 dB noise figure and 100–220 h_FE ensure high SNR and consistent gain across production units.	Use Scenario: Level-shifting and current boosting between 3.3 V MCU GPIO and 5 V peripheral logic inputs. IC Role / Device Role / Timing Role: Digital switch configured in common-emitter mode with base resistor network. Use Value: 0.35 V V_CE(sat) and 800 ns t_OFF enable fast, low-loss toggling without shoot-through risk.
Portable Instrumentation Input Buffer	Low-Power Relay Driver
Use Scenario: Isolating and buffering analog sensor outputs in handheld multimeters or data loggers. IC Role / Device Role / Timing Role: Emitter-follower voltage buffer with unity gain and high input impedance. Use Value: Low V_BE(on) (0.55–0.75 V) and stable h_FE maintain linearity under varying battery voltage (2.7–3.6 V).	Use Scenario: Driving 5 V, 40 mA coil relays from battery-powered control boards. IC Role / Device Role / Timing Role: Saturated switch with base current limiting and collector flyback protection. Use Value: 350 mW P_C rating and 32 V V_CEO allow safe operation with inductive kickback suppression.

Audio Pre-amplifier Stage

Microcontroller Interface Driver

Use Scenario: Amplifying weak signals from electret microphones or piezoelectric sensors before ADC sampling.

IC Role / Device Role / Timing Role: NPN common-emitter amplifier with fixed bias network and emitter degeneration resistor.

Use Value: 6 dB noise figure and 100–220 h_FE ensure high SNR and consistent gain across production units.

Use Scenario: Level-shifting and current boosting between 3.3 V MCU GPIO and 5 V peripheral logic inputs.

IC Role / Device Role / Timing Role: Digital switch configured in common-emitter mode with base resistor network.

Use Value: 0.35 V V_CE(sat) and 800 ns t_OFF enable fast, low-loss toggling without shoot-through risk.

Portable Instrumentation Input Buffer

Low-Power Relay Driver

Use Scenario: Isolating and buffering analog sensor outputs in handheld multimeters or data loggers.

IC Role / Device Role / Timing Role: Emitter-follower voltage buffer with unity gain and high input impedance.

Use Value: Low V_BE(on) (0.55–0.75 V) and stable h_FE maintain linearity under varying battery voltage (2.7–3.6 V).

Use Scenario: Driving 5 V, 40 mA coil relays from battery-powered control boards.

IC Role / Device Role / Timing Role: Saturated switch with base current limiting and collector flyback protection.

Use Value: 350 mW P_C rating and 32 V V_CEO allow safe operation with inductive kickback suppression.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BC847BDW	Double-transistor SOT-363 package; h_FE = 200–450; V_CEO = 45 V; higher gain but dual-device footprint	Requires PCB redesign for dual-gang layout; better for matched-pair differential amps	Select when dual transistors or higher V_CEO margin is needed; not drop-in for single-device BCW60D layouts
MMBT3904LT1G	h_FE = 100–300; V_CEO = 40 V; same SOT-23 package; 300 mW P_C; slightly lower power rating	Compatible pinout and biasing; acceptable for most BCW60D linear/switching roles below 300 mW	Preferred for new designs requiring broader vendor availability and RoHS compliance; verify thermal derating at 100 mA

Compared with BCW60D, BC847BDW offers dual topology and higher voltage margin but demands layout changes, while MMBT3904LT1G provides identical SOT-23 fit with extended lifecycle support and tighter h_FE consistency - ideal for cost-sensitive, high-volume replacements.

Availability

BCW60D is available at Aetrix Electronics and suitable for portable instrumentation, consumer audio interfaces, and low-power relay control applications requiring stable component supply and long-term sourcing continuity.

Supply support for BCW60D 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

Fairchild Semiconductor was a U.S.-based semiconductor manufacturer specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016.

The BCW60D belongs to Fairchild's legacy BCW60 family of general-purpose NPN transistors designed for cost-effective, high-reliability signal amplification and switching in consumer and industrial electronics.

FAQ

What is the maximum collector current rating for BCW60D?

The BCW60D has a maximum continuous collector current (I_C) rating of 100 mA at T_A = 25°C. Derating is required above 25°C ambient per the thermal resistance curve in the original Fairchild datasheet. This rating supports typical use cases such as LED drivers, small-signal switches, and pre-amplifier stages without forced cooling.

Does BCW60D have a guaranteed h_FE range, and how is it binned?

Yes, BCW60D is binned to guarantee h_FE = 100–220 at V_CE = 5 V and I_C = 2 mA. This binning is confirmed in the "Electrical Characteristics" table of the Fairchild BCW60A/B/C/D datasheet Rev. B2. The AD marking code identifies the BCW60D variant, distinguishing it from BCW60A (AA), BCW60B (AB), and BCW60C (AC).

What is the pin configuration of BCW60D in the SOT-23 package?

The BCW60D uses standard SOT-23 pinout: Pin 1 = Base, Pin 2 = Emitter, Pin 3 = Collector. This configuration is explicitly shown in the "Package Dimensions" and "Pin Identification" diagrams of the Fairchild BCW60A/B/C/D datasheet. It matches JEDEC TO-236AB mechanical outline and is compatible with automated placement equipment calibrated for SOT-23 devices.

Can BCW60D be used in RF applications, and what is its f_T?

Yes, BCW60D is characterized with f_T = 125 MHz at I_C = 10 mA and V_CE = 5 V, making it suitable for VHF-band buffer amplifiers, IF stages, and low-power oscillator circuits up to ~20 MHz. Its 4.5 pF Cob and low noise figure further support stable small-signal RF performance in non-critical transmitter/receiver front-ends.

Is BCW60D still in active production, and what is its lifecycle status?

BCW60D is classified as obsolete by ON Semiconductor (which acquired Fairchild in 2016), with no active production or new datasheet revisions since Rev. B2 (December 2002). However, Aetrix Electronics maintains verified legacy stock with full traceability and supports design-in continuity through controlled distribution and cross-reference guidance for functional alternatives like MMBT3904LT1G.

BCW60D Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Transistor Type:: NPN

Current - Collector (Ic) (Max):: 100 mA

Voltage - Collector Emitter Breakdown (Max):: 32 V

Vce Saturation (Max) @ Ib, Ic:: 550mV @ 1.25mA, 50mA

Current - Collector Cutoff (Max):: 20nA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 380 @ 2mA, 5V

Power - Max:: 350 mW

Frequency - Transition:: 125MHz

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

BCW60D FAQ

1.How can I place an order for BCW60D through Aetrix?

Please submit a Request for Quotation (RFQ) for BCW60D on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for BCW60D reliable?

The price and inventory of BCW60D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BCW60D is usually 5 days.

3.What payment methods are accepted for BCW60D?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BCW60D transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BCW60D?

BCW60D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BCW60D order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for BCW60D?

For technical support, including BCW60D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BCW60D requirements.

6.How does Aetrix verify that BCW60D is sourced from the original manufacturer or authorized distributors?

All BCW60D products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BCW60D meets industry standards.

7.What is the process for return or replacement of BCW60D?

All BCW60D units undergo pre-shipment inspection (PSI). If there is an issue with BCW60D, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The BCW60D part is unused and in its original packaging.

Return procedure for BCW60D:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…