onsemi BDW93C

Overview

BDW93C from ON Semiconductor is a high-voltage NPN epitaxial silicon Darlington transistor in TO-220 package, rated for 100 V V_CEO, 12 A DC collector current, and 80 W power dissipation at T_C = 25°C. It serves as a robust output stage in hammer drivers and audio amplifiers, delivering high current gain (h_FE ≥ 1000 at I_C = 3 A) with integrated parallel diode for inductive load protection.

For engineers reviewing the BDW93C datasheet, pinout, applications, or equivalent options, key selection considerations include its 100 V blocking capability, 1.5 °C/W junction-to-case thermal resistance, complementary pairing with BDW94C, and suitability for high-current switching in industrial solenoid and audio output circuits.

Technical Context

The BDW93C operates as a monolithic Darlington pair with built-in base-emitter shunt resistor and an integrated parallel diode across C–E terminals. Its structure enables high DC current gain while maintaining safe operating area up to 100 V and 10 A under pulsed conditions.

It features low saturation voltage (V_CE(sat) ≤ 3 V at I_C = 10 A, I_B = 100 mA), high sustaining voltage (B_VCEO(sus) = 100 V), and tight leakage control (I_CEO ≤ 1 mA at V_CE = 100 V), making it suitable for ruggedized linear and switching applications where voltage margin and thermal stability are critical.

Key Specifications

Pinout & Package

BDW93C is housed in a TO-220 package with insulated tab, featuring three leads: Base (pin 1), Collector (pin 2), Emitter (pin 3). The metal tab is electrically connected to the collector and must be isolated from chassis ground unless intentionally tied to system collector potential.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BUW13A and MJD122G, BDW93C uniquely combines 100 V rating, 12 A DC capability, 80 W dissipation, and integrated diode-making it the only option among the three qualified for high-energy inductive switching at full rated current without supplemental protection.

Availability

BDW93C is available at Aetrix Electronics and suitable for hammer drivers, audio amplifiers, and DC motor control applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.

Supply support for BDW93C 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, analog, sensor, and connectivity solutions for automotive, industrial, cloud computing, and consumer markets.

BDW93C belongs to ON Semiconductor's legacy power bipolar transistor portfolio, originally developed by Fairchild Semiconductor for high-reliability industrial switching and linear amplification where ruggedness, voltage margin, and integrated protection are essential.

FAQ

What is the maximum continuous collector current for BDW93C?

The BDW93C is rated for 12 A DC collector current at T_C = 25°C. Derating is required above 25°C case temperature per the power derating curve in the datasheet-e.g., at 100°C case temperature, maximum I_C drops to approximately 6 A. Operation beyond this limit risks thermal runaway and permanent failure. Always verify thermal design using R_θJC = 1.5 °C/W and ambient/heatsink conditions.

Does BDW93C have an integrated diode, and what is its purpose?

Yes, BDW93C includes an integrated anti-parallel diode between collector and emitter. This diode provides inherent flyback protection during turn-off of inductive loads such as solenoids or motors, clamping voltage spikes and eliminating the need for an external freewheeling diode. Its forward voltage is ≤1.8 V at 10 A, ensuring low-loss energy recirculation without compromising switching speed.

Is BDW93C pin-compatible with BDW93B or BDW93A?

No-BDW93C is not pin-compatible with BDW93B or BDW93A in terms of voltage rating or safe operating area, though all share identical TO-220 pinout (Base–Collector–Emitter). BDW93C is rated for 100 V V_CEO, whereas BDW93B is 80 V and BDW93A is 60 V. Substituting lower-voltage variants risks catastrophic breakdown under 100 V stress; always match the exact suffix for voltage compliance.

What is the typical DC current gain (h_FE) of BDW93C at different collector currents?

BDW93C exhibits h_FE ≥ 1000 at I_C = 3 A, ≥ 750 at I_C = 5 A, and ≥ 100 at I_C = 10 A (all at V_CE = 3 V). This progressive gain reduction reflects Darlington behavior under high current-designers should size base drive accordingly, e.g., 100 mA base current needed for 10 A collector current at minimum gain.

Can BDW93C be used in complementary symmetry amplifier configurations?

Yes-BDW93C is explicitly designed as the NPN complement to BDW94C (its PNP counterpart), sharing matched voltage ratings (100 V), thermal characteristics (R_θJC = 1.5 °C/W), and package (TO-220). This pairing enables thermally balanced push-pull or quasi-complementary output stages in audio amplifiers and motor drivers where symmetrical clipping and thermal tracking are critical.