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

onsemi BDW93A

Name: BDW93A
Brand: onsemi
SKU: BDW93A
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: BDW93A

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: BDW93A.pdf

Description:: TRANS NPN DARL 60V 12A TO-220-3

Quantity:: RFQ Add To RFQ list

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Inventory:8,993

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Product details

Overview

BDW93A from ON Semiconductor is an NPN epitaxial silicon Darlington transistor in TO-220 package, rated for 60 V V_CEO, 12 A continuous collector current, and 80 W power dissipation at T_C = 25°C. It serves as a high-current switching or amplification device in hammer drivers and audio amplifier output stages.

For engineers reviewing the BDW93A datasheet, pinout, applications, or equivalent options, key selection criteria include V_CEO = 60 V, h_FE ≥ 750 at I_C = 5 A, V_CE(sat) ≤ 3 V at I_C = 10 A / I_B = 100 mA, integrated parallel diode, and TO-220 thermal resistance of 1.5 °C/W.

Technical Context

The BDW93A is a monolithic NPN Darlington pair with built-in base-emitter shunt resistor and integrated antiparallel diode, optimized for high-current linear and switching operation. Its structure enables low saturation voltage and high DC current gain (h_FE ≥ 750 at I_C = 5 A) while maintaining safe operating area up to 100 V and 10 A under pulsed conditions.

It complements the BDW94A PNP Darlington in push-pull configurations and shares identical TO-220 mechanical footprint and pinout (Base–Collector–Emitter) with BDW93, BDW93B, and BDW93C variants-differing only in breakdown voltage ratings and corresponding test conditions for leakage and sustaining voltage.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	60 V - Maximum collector-emitter voltage before breakdown under open-base condition; defines safe DC voltage swing in amplifier or switch applications.
I_C (DC)	12 A - Continuous collector current capability at T_C = 25°C; determines maximum steady-state load drive capacity.
P_C	80 W - Maximum power dissipation at case temperature 25°C; requires heatsink design supporting R_θJC = 1.5 °C/W.
h_FE	750 min @ I_C = 5 A - Minimum DC current gain ensures reliable base drive efficiency in high-current switching circuits.
V_CE(sat)	3 V max @ I_C = 10 A / I_B = 100 mA - Low saturation voltage minimizes conduction loss and heat generation in on-state operation.
V_F (diode)	1.8 V max @ I_F = 10 A - Forward voltage of integrated antiparallel diode enables freewheeling in inductive load switching.

Pinout & Package

BDW93A uses the standard TO-220 package with 3 leads and isolated tab. The case is electrically connected to the collector terminal. Mounting requires insulating hardware if collector is not at chassis ground.

Pin/Terminal	Circuit Role	Design Meaning
1 (Left)	Base	Control input node; requires ~100 mA drive for full saturation at 10 A collector current.
2 (Center)	Collector	Main power output node; electrically tied to metal tab; must be thermally coupled to heatsink.
3 (Right)	Emitter	Power return path; referenced to system ground or negative rail in common-emitter configuration.

Key Features

Feature	Design Value
Integrated antiparallel diode	Enables self-contained flyback protection in relay or solenoid driver designs without external diode placement.
Darlington architecture	Delivers high h_FE (≥750) with low base drive requirement, reducing control circuit complexity and power loss.
TO-220 package with isolated tab	Supports direct mounting to heatsinks while enabling electrical isolation where collector voltage differs from chassis potential.
Complementary pairing with BDW94A	Allows matched push-pull output stage implementation in Class AB audio amplifiers or H-bridge motor drivers.

Applications

Hammer Drivers	Audio Amplifier Output Stage
Use Scenario: Driving electromagnetic solenoids in industrial riveting or pneumatic hammer tools requiring rapid on/off cycling at 10–12 A peak current. IC Role / Device Role / Timing Role: High-current NPN Darlington switch controlling solenoid coil current; operates in saturated switching mode with <1 µs turn-off delay when paired with snubber. Use Value: Integrated antiparallel diode clamps inductive kickback, eliminating need for discrete flyback diode and reducing PCB footprint by 25%.	Use Scenario: Output emitter-follower stage in 50 W Class AB audio power amplifier delivering low-distortion signal to 4 Ω or 8 Ω speakers. IC Role / Device Role / Timing Role: Final current gain and power delivery element; biased in linear region with V_CE > 2 V to minimize crossover distortion. Use Value: h_FE ≥ 750 at 5 A ensures stable bias point across temperature, reducing thermal drift and improving long-term THD performance.
DC Motor Control	Industrial Power Supply Regulator
Use Scenario: Unidirectional PWM-driven DC motor controller for conveyor systems handling loads up to 1 kW at 48 V bus. IC Role / Device Role / Timing Role: High-side or low-side switching element in half-bridge topology; operated with 5–20 kHz PWM frequency and 100 ns dead-time margin. Use Value: V_CEO = 60 V provides 20% voltage headroom above 48 V nominal rail, preventing avalanche failure during transient overvoltage events.	Use Scenario: Series pass transistor in adjustable linear power supply delivering 0–30 V / 0–10 A with foldback current limiting. IC Role / Device Role / Timing Role: Linear regulator pass element dissipating up to 60 W continuously; thermally managed via forced-air heatsink. Use Value: R_θJC = 1.5 °C/W enables junction temperature rise of ≤90°C at 60 W dissipation, ensuring reliable operation within 150°C T_J limit.

Hammer Drivers

Audio Amplifier Output Stage

Use Scenario: Driving electromagnetic solenoids in industrial riveting or pneumatic hammer tools requiring rapid on/off cycling at 10–12 A peak current.

IC Role / Device Role / Timing Role: High-current NPN Darlington switch controlling solenoid coil current; operates in saturated switching mode with <1 µs turn-off delay when paired with snubber.

Use Value: Integrated antiparallel diode clamps inductive kickback, eliminating need for discrete flyback diode and reducing PCB footprint by 25%.

Use Scenario: Output emitter-follower stage in 50 W Class AB audio power amplifier delivering low-distortion signal to 4 Ω or 8 Ω speakers.

IC Role / Device Role / Timing Role: Final current gain and power delivery element; biased in linear region with V_CE > 2 V to minimize crossover distortion.

Use Value: h_FE ≥ 750 at 5 A ensures stable bias point across temperature, reducing thermal drift and improving long-term THD performance.

DC Motor Control

Industrial Power Supply Regulator

Use Scenario: Unidirectional PWM-driven DC motor controller for conveyor systems handling loads up to 1 kW at 48 V bus.

IC Role / Device Role / Timing Role: High-side or low-side switching element in half-bridge topology; operated with 5–20 kHz PWM frequency and 100 ns dead-time margin.

Use Value: V_CEO = 60 V provides 20% voltage headroom above 48 V nominal rail, preventing avalanche failure during transient overvoltage events.

Use Scenario: Series pass transistor in adjustable linear power supply delivering 0–30 V / 0–10 A with foldback current limiting.

IC Role / Device Role / Timing Role: Linear regulator pass element dissipating up to 60 W continuously; thermally managed via forced-air heatsink.

Use Value: R_θJC = 1.5 °C/W enables junction temperature rise of ≤90°C at 60 W dissipation, ensuring reliable operation within 150°C T_J limit.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BDW93	V_CEO = 45 V (vs. 60 V); same package, pinout, and h_FE spec at lower current.	Not suitable for 48 V systems with transients; limited to ≤36 V DC rails.	Select BDW93 only when supply voltage remains strictly below 40 V and cost sensitivity outweighs voltage margin.
MJ11015G	Higher V_CEO = 100 V, but TO-3 package; no integrated diode; h_FE = 1000 min @ I_C = 5 A.	Requires external flyback diode and larger heatsink footprint; better for high-voltage industrial SMPS feedback loops.	Choose MJ11015G when >80 V breakdown and higher reliability in harsh environments justify TO-3 mechanical redesign.

Compared with BDW93 and MJ11015G, the BDW93A offers optimal balance of 60 V rating, integrated diode, TO-220 compatibility, and proven thermal performance-making it preferred for mid-voltage industrial drivers where layout space and BOM count are constrained.

Availability

BDW93A is available at Aetrix Electronics and suitable for hammer drivers, audio amplifier output stages, and DC motor control applications requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.

Supply support for BDW93A 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 power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The BDW93A belongs to Fairchild's legacy power bipolar transistor family, designed specifically for robust high-current linear and switching applications in industrial automation, audio systems, and electromechanical actuation.

FAQ

What is the maximum continuous collector current rating for BDW93A?

The BDW93A has a maximum continuous collector current (I_C) rating of 12 A at case temperature T_C = 25°C. This rating decreases with rising case temperature per the derating curve in the datasheet, reaching zero at T_C ≈ 175°C. For sustained 10 A operation, thermal design must maintain T_C ≤ 75°C using a heatsink with appropriate R_θCA.

Does BDW93A include an integrated diode, and what is its forward voltage?

Yes, BDW93A integrates an antiparallel diode between collector and emitter. Its forward voltage (V_F) is specified as 1.8 V maximum at I_F = 10 A and 2 V maximum at I_F = 10 A under pulse conditions. This diode enables inherent flyback protection in inductive switching applications without requiring external components.

What is the pin configuration of BDW93A in the TO-220 package?

The BDW93A uses standard TO-220 pinout: Pin 1 (left) is Base, Pin 2 (center) is Collector (electrically connected to the metal tab), and Pin 3 (right) is Emitter. This matches the pinout of BDW93, BDW93B, BDW93C, and complementary BDW94x series devices-ensuring board-level compatibility across voltage variants.

How does BDW93A differ from BDW93B and BDW93C in terms of voltage rating?

BDW93A is rated for V_CEO = 60 V and V_CBO = 60 V, whereas BDW93B is rated for 80 V and BDW93C for 100 V. All share identical package, pinout, thermal specs, and h_FE characteristics-but ICBO and ICEO test conditions scale with their respective voltage ratings. Select BDW93A for 48 V systems needing margin; BDW93B/C for higher bus voltages.

Is BDW93A suitable for linear regulator applications, and what thermal considerations apply?

Yes, BDW93A is commonly used as a series pass transistor in adjustable linear regulators. With P_C = 80 W at T_C = 25°C and R_θJC = 1.5 °C/W, it requires careful heatsink design: for 60 W dissipation, junction temperature rise is 90°C, so ambient + heatsink rise must stay below 60°C to remain within the 150°C T_J limit.

BDW93A Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: NPN - Darlington

Current - Collector (Ic) (Max):: 12 A

Voltage - Collector Emitter Breakdown (Max):: 60 V

Vce Saturation (Max) @ Ib, Ic:: 3V @ 100mA, 10A

Current - Collector Cutoff (Max):: 1mA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 750 @ 5A, 3V

Power - Max:: 80 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220-3

BDW93A FAQ

1.How can I place an order for BDW93A through Aetrix?

Please submit a Request for Quotation (RFQ) for BDW93A 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 BDW93A reliable?

The price and inventory of BDW93A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BDW93A is usually 5 days.

3.What payment methods are accepted for BDW93A?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BDW93A transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BDW93A?

BDW93A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BDW93A 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 BDW93A?

For technical support, including BDW93A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BDW93A requirements.

6.How does Aetrix verify that BDW93A is sourced from the original manufacturer or authorized distributors?

All BDW93A 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 BDW93A meets industry standards.

7.What is the process for return or replacement of BDW93A?

All BDW93A units undergo pre-shipment inspection (PSI). If there is an issue with BDW93A, 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 BDW93A part is unused and in its original packaging.

Return procedure for BDW93A:

1.Submit a request within 90 days.

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

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