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

STMicroelectronics BDW94CFP

Name: BDW94CFP
Brand: STMicroelectronics
SKU: BDW94CFP
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BDW94CFP

Manufacturer:: STMicroelectronics

Category:: Single Bipolar Transistors

Package:: TO-220-3 Full Pack

Datasheet:: BDW94CFP.pdf

Description:: TRANS PNP DARL 100V 12A TO-220FP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:790

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

Product details

Overview

BDW94CFP from STMicroelectronics is a complementary PNP silicon power Darlington transistor in monolithic configuration, housed in a fully molded insulated TO-220FP package. It features integrated antiparallel collector-emitter diode, 100 V V_CEO, 12 A continuous collector current, and 2000 V_DC insulation rating per UL standards - used in industrial linear and switching power stages.

For engineers reviewing the BDW94CFP datasheet, BDW94CFP pinout, BDW94CFP application, or BDW94CFP equivalent, key selection criteria include safe operating area (SOA) compliance at T_c ≤ 25 °C, V_CE(sat) ≤ 3 V at I_C = 10 A / I_B = 100 mA, and thermal resistance R_thj-case = 3.8 °C/W for heatsink-limited designs.

Technical Context

The BDW94CFP implements a monolithic PNP Darlington pair with built-in base-emitter resistor network (R1 ≈ 10 kΩ, R2 ≈ 150 Ω) enabling simplified drive and improved turn-off behavior. Its integrated antiparallel diode supports bidirectional current handling in inductive switching circuits without external flyback protection.

Rated for 150 °C maximum junction temperature and −65 to 150 °C storage range, it operates under pulsed conditions (300 µs, 1.5% duty cycle) for sustaining voltage (V_CEO(sus) = 100 V) and saturation performance, meeting industrial equipment reliability requirements.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO	100 V - Maximum collector-emitter blocking voltage with base open; defines usable voltage headroom in linear regulators or switch-mode output stages.
I_C	12 A - Continuous DC collector current at T_c ≤ 25 °C; sets baseline conduction capability for motor drives or power supplies.
P_tot	33 W - Total power dissipation at case temperature ≤ 25 °C; determines minimum heatsink requirement for thermal management.
R_thj-case	3.8 °C/W - Junction-to-case thermal resistance; directly calculates ΔT_j-c = P × 3.8 for thermal design margining.
V_CE(sat)	3 V max at I_C = 10 A / I_B = 100 mA - Saturation voltage defining conduction loss in switching applications.
h_FE	100–20000 - DC current gain range across I_C = 3–10 A; enables low-base-drive-current operation but requires careful bias stability design.
V_F	1.3–2 V at I_F = 5–10 A - Forward voltage of integrated antiparallel diode; reduces component count in H-bridge or relay driver topologies.

Pinout & Package

Package: TO-220FP - fully molded insulated plastic package with 2000 V_DC isolation between mounting base and internal leads, UL-compliant, intended for direct heatsink mounting without insulating washers.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Main emitter terminal	Low-side reference node; connected to load return path or ground in common-emitter configurations.
2 (Base)	Control input	Drives Darlington pair via internal resistive network; accepts ~100 mA for full saturation at 10 A collector current.
3 (Collector)	Main collector terminal	High-current output node; electrically isolated from heatsink due to TO-220FP insulation; connects to supply rail or inductive load.

Key Features

Feature	Design Value
Monolithic Darlington configuration	Single-die integration eliminates inter-device parameter mismatch and improves thermal coupling for consistent gain and switching behavior.
Integrated antiparallel diode	Eliminates need for external flyback diode in inductive load switching, reducing BOM count and PCB footprint in relay/motor drivers.
UL-rated 2000 V_DC insulation	Enables direct mounting to grounded heatsinks without additional isolation hardware, simplifying mechanical assembly and improving thermal transfer.
Internal base-emitter resistors (R1/R2)	Provides self-biasing and controlled turn-off, reducing external component count and improving immunity to leakage-induced false triggering.

Applications

Industrial Motor Control

Linear Power Supply Regulator

Use Scenario: Driving 12–24 V DC brushed motors in PLC-controlled conveyor systems with PWM frequencies up to 20 kHz.

IC Role / Device Role / Timing Role: High-current PNP Darlington switch providing bidirectional current control via complementary BDW93CFP/BDW94CFP H-bridge stage.

Use Value: Integrated antiparallel diode clamps inductive kickback during PWM off-time, eliminating external snubbers and reducing EMI generation.

Use Scenario: Pass transistor in adjustable 0–30 V / 5 A linear bench power supply with analog feedback loop.

IC Role / Device Role / Timing Role: Series pass element operating in active region, dissipating up to 33 W with forced-air heatsinking.

Use Value: High h_FE (>1000 at 3 A) minimizes base drive current demand, easing op-amp output stage design and improving regulation stability.

Switch-Mode Power Supply Output Stage

Industrial Relay Driver

Use Scenario: Low-side synchronous rectifier or high-side switch in 100–500 W offline SMPS auxiliary supplies.

IC Role / Device Role / Timing Role: Complementary Darlington pair used in quasi-resonant or hard-switched output stage with gate-driven base control.

Use Value: 100 V V_CEO and SOA compliance support 400 V DC bus derating, enabling robust operation under transient overvoltage conditions.

Use Scenario: Driving 24 V / 2 A industrial relays in safety-critical control panels requiring galvanic isolation.

IC Role / Device Role / Timing Role: High-gain PNP switch interfacing microcontroller GPIO to relay coil, with built-in diode clamping.

Use Value: 2000 V_DC insulation ensures creepage/clearance compliance between relay coil circuit and controller ground plane.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BDW94B	Same die, TO-220 (non-insulated) package; no 2000 V_DC isolation; R_thj-case = 3.0 °C/W.	Requires insulating washer for heatsink mounting; unsuitable where UL-rated isolation is mandated.	Select when cost-sensitive and isolation not required; verify creepage distance in final layout.
MJD47	TO-252 (DPAK) package; lower I_C = 8 A; V_CEO = 80 V; no integrated diode.	Limited to lower-power, surface-mount designs; needs external flyback diode and thermal pad routing.	Choose for space-constrained PCBs where 8 A and 80 V ratings suffice and SMT assembly is preferred.

Compared with BDW94B and MJD47, the BDW94CFP uniquely combines UL-certified insulation, integrated diode, and 12 A/100 V ratings in a through-hole package - making it optimal for safety-compliant, high-reliability industrial power stages where mechanical mounting simplicity and BOM reduction are critical.

Availability

BDW94CFP is available at Aetrix Electronics and suitable for industrial motor control, linear power supply regulation, switch-mode power supply output stages, and industrial relay driver applications requiring stable component supply and long-term lifecycle support.

Supply support for BDW94CFP 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and power applications.

The BDW94CFP belongs to ST's high-voltage power transistor family, engineered specifically for ruggedized industrial switching and linear power conversion where reliability, isolation, and integrated protection are mandatory.

FAQ

Is BDW94CFP pin-compatible with BDW94B?

No. BDW94CFP uses TO-220FP (insulated) packaging with lead spacing optimized for isolated mounting, while BDW94B uses standard TO-220 with electrically conductive tab. Pin numbering is identical (E-B-C), but mechanical mounting and thermal interface differ significantly - requiring PCB redesign and heatsink isolation review.

What is the role of the integrated antiparallel diode?

The integrated collector-emitter diode provides intrinsic flyback path for inductive loads, conducting reverse current during switch-off transients. It is rated for 5–10 A forward current with V_F = 1.3–2.0 V, eliminating need for discrete diodes in H-bridge or relay driver circuits while maintaining SOA integrity.

Can BDW94CFP be used in parallel for higher current?

Not recommended without individual emitter resistors and matched devices. Darlington h_FE variation causes current imbalance; thermal runaway risk increases due to positive temperature coefficient of V_BE. ST does not specify parallel operation - use single-device SOA limits or select higher-rated alternatives like BDX54C for >12 A needs.

Does BDW94CFP require a base resistor when driven by a microcontroller?

Yes. Although internal R1/R2 provide partial biasing, a series base resistor (typically 1–2.2 kΩ for 3.3 V/5 V GPIO) is required to limit peak base current and ensure reliable saturation at full I_C. Without it, excessive I_B may exceed 0.2 A absolute maximum rating and degrade long-term reliability.

BDW94CFP Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

Product Status:: Active

Transistor Type:: PNP - Darlington

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

Voltage - Collector Emitter Breakdown (Max):: 100 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:: 33 W

Frequency - Transition:: -

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220FP

BDW94CFP FAQ

1.How can I place an order for BDW94CFP through Aetrix?

Please submit a Request for Quotation (RFQ) for BDW94CFP 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 BDW94CFP reliable?

The price and inventory of BDW94CFP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BDW94CFP is usually 5 days.

3.What payment methods are accepted for BDW94CFP?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BDW94CFP transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BDW94CFP?

BDW94CFP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BDW94CFP 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 BDW94CFP?

For technical support, including BDW94CFP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BDW94CFP requirements.

6.How does Aetrix verify that BDW94CFP is sourced from the original manufacturer or authorized distributors?

All BDW94CFP 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 BDW94CFP meets industry standards.

7.What is the process for return or replacement of BDW94CFP?

All BDW94CFP units undergo pre-shipment inspection (PSI). If there is an issue with BDW94CFP, 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 BDW94CFP part is unused and in its original packaging.

Return procedure for BDW94CFP:

1.Submit a request within 90 days.

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

Tech Hub

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…

2026-08-21 What Is an LED Driver? Types, Circuits, Dimming, and Selection

An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…