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 BDW47G

Name: BDW47G
Brand: onsemi
SKU: BDW47G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: BDW47G

Manufacturer:: onsemi

Category:: Single Bipolar Transistors

Package:: TO-220-3

Datasheet:: BDW47G.pdf

Description:: TRANS PNP DARL 100V 15A TO-220

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,911

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

Product details

Overview

BDW47G from onsemi is a PNP silicon Darlington power transistor in TO-220 package, rated for 100 V_CEO(sus), 15 A_C, and 85 W at T_C = 25°C, with typical h_FE = 2500 at I_C = 5.0 A - designed for medium-power low-speed switching in industrial motor controls and relay drivers.

For engineers reviewing the BDW47G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical ratings, thermal derating behavior, safe operating area limits, saturation voltage performance at 5–10 A, and validated PNP Darlington alternatives for high-gain switching designs.

Technical Context

The BDW47G implements a monolithic PNP Darlington pair with built-in base-emitter shunt resistors, enabling simplified drive requirements and stable DC current gain across temperature. Its second-breakdown-limited SOA supports pulsed operation up to 3.8 A at V_CE = 22.5 V (non-repetitive, 250 ms).

Thermal resistance R_JC is 1.47°C/W, and output capacitance C_ob is 300 pF at V_CB = 10 V, confirming suitability for <5 MHz switching applications where charge storage and thermal management are critical.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CEO(sus)	100 V min - sustains 100 V collector-emitter voltage at I_C = 30 mA with zero base current, defining maximum off-state blocking capability
I_C (max)	15 A dc - continuous collector current rating, usable up to 10 A with V_CE(sat) ≤ 3.0 V under specified drive conditions
h_FE (typ)	2500 @ I_C = 5.0 A - enables microampere-level base drive for 5 A load switching, reducing driver circuit complexity
V_CE(sat)	2.0 V max @ I_C = 5.0 A, I_B = 10 mA - low saturation voltage minimizes conduction loss in linear and switching modes
P_D	85 W @ T_C = 25°C - power dissipation limit requiring heatsink design per 1.47°C/W junction-to-case thermal path
f_T	4.0 MHz - transition frequency confirms usable bandwidth for low-speed switching (<100 kHz) with adequate gain margin
C_ob	300 pF @ V_CB = 10 V - output capacitance impacts turn-off speed and snubber design in inductive load circuits

Pinout & Package

BDW47G is housed in a TO-220 (Case 221A, Style 1) plastic package with center-tab mounting and isolated collector. The tab is electrically connected to the collector terminal.

Pin/Terminal	Circuit Role	Design Meaning
1 (Emitter)	Emitting terminal of PNP Darlington pair	Connected to system ground or low-side return; carries full load current with minimal voltage drop
2 (Base)	Control input for Darlington pair	Receives low-current drive (≤500 mA); internal shunt resistor provides turn-off biasing
3 (Collector / Tab)	Main current-carrying terminal	Electrically tied to metal tab; must be insulated from heatsink unless system common is collector-referenced

Key Features

Feature	Design Value
Monolithic Darlington construction	Integrates driver and output transistors on single die, eliminating external interconnects and improving reliability over discrete pairs
Built-in base-emitter shunt resistors	Ensures active turn-off without external pull-down, reducing component count and PCB space in relay/motor control boards
100 V_CEO(sus) rating	Supports direct interface with 48 V industrial buses and 100 V peak inductive kickback without external clamping
R_JC = 1.47°C/W	Enables compact heatsink design: ~10°C rise per 7 W dissipated, critical for enclosed industrial enclosures
Pb-Free / RoHS compliant	Meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 3 moisture sensitivity, supporting lead-free reflow assembly

Applications

Industrial Relay Drivers	DC Motor Start/Stop Control
Use Scenario: Driving 24–48 V DC electromagnetic relays with coil currents up to 12 A in PLC output modules. IC Role / Device Role / Timing Role: High-gain PNP switch providing galvanically isolated load switching via optocoupler-driven base. Use Value: 2500 h_FE allows 5 mA opto-output to switch 12 A loads, eliminating secondary driver stages and reducing BOM cost.	Use Scenario: Controlling bidirectional brushed DC motors (up to 1 kW) in conveyor systems using complementary H-bridge configurations. IC Role / Device Role / Timing Role: Upper-leg PNP switch in half-bridge topology, handling reverse EMF during motor coasting. Use Value: 100 V_CEO(sus) withstands >80 V inductive spikes without snubbers, simplifying protection circuitry in harsh factory environments.
AC Solid-State Relay Input Stage	High-Voltage Linear Regulator Pass Element
Use Scenario: Isolated AC SSR input stage converting 120/240 VAC line-synchronized signals into low-voltage DC logic-compatible pulses. IC Role / Device Role / Timing Role: PNP Darlington amplifier stage translating zero-crossing detector output into clean TTL-level enable signals. Use Value: Low V_CE(sat) (2.0 V max) ensures minimal self-heating during sustained conduction, extending SSR lifetime in continuous-duty applications.	Use Scenario: Pass transistor in 72 V input, 24 V/5 A adjustable linear regulator for test equipment power supplies. IC Role / Device Role / Timing Role: Series pass element operating in linear region with forced-air cooling and current limiting. Use Value: 85 W power rating and 150°C max junction temperature support 5 A output at 48 V dropout with conservative thermal margin.

Industrial Relay Drivers

DC Motor Start/Stop Control

Use Scenario: Driving 24–48 V DC electromagnetic relays with coil currents up to 12 A in PLC output modules.

IC Role / Device Role / Timing Role: High-gain PNP switch providing galvanically isolated load switching via optocoupler-driven base.

Use Value: 2500 h_FE allows 5 mA opto-output to switch 12 A loads, eliminating secondary driver stages and reducing BOM cost.

Use Scenario: Controlling bidirectional brushed DC motors (up to 1 kW) in conveyor systems using complementary H-bridge configurations.

IC Role / Device Role / Timing Role: Upper-leg PNP switch in half-bridge topology, handling reverse EMF during motor coasting.

Use Value: 100 V_CEO(sus) withstands >80 V inductive spikes without snubbers, simplifying protection circuitry in harsh factory environments.

AC Solid-State Relay Input Stage

High-Voltage Linear Regulator Pass Element

Use Scenario: Isolated AC SSR input stage converting 120/240 VAC line-synchronized signals into low-voltage DC logic-compatible pulses.

IC Role / Device Role / Timing Role: PNP Darlington amplifier stage translating zero-crossing detector output into clean TTL-level enable signals.

Use Value: Low V_CE(sat) (2.0 V max) ensures minimal self-heating during sustained conduction, extending SSR lifetime in continuous-duty applications.

Use Scenario: Pass transistor in 72 V input, 24 V/5 A adjustable linear regulator for test equipment power supplies.

IC Role / Device Role / Timing Role: Series pass element operating in linear region with forced-air cooling and current limiting.

Use Value: 85 W power rating and 150°C max junction temperature support 5 A output at 48 V dropout with conservative thermal margin.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MJD47T4G	TO-252 (DPAK), 100 V_CEO, 10 A_C, h_FE = 750 (min) - lower current, surface-mount, no integrated shunt resistor	Requires external base pull-down; suited for automated SMT assembly but needs higher drive current	Select when board space is constrained and reflow compatibility is required; not drop-in for through-hole BDW47G layouts
BDW46G	Same TO-220 package, but rated for 80 V_CEO(sus) and 15 A_C; otherwise identical construction and pinout	Lower voltage rating restricts use in 100 V bus or high-inductance load applications	Choose only if system maximum V_CE remains ≤80 V; shares same footprint and thermal profile

Compared with MJD47T4G and BDW46G, the BDW47G offers the highest sustainable voltage (100 V) among TO-220 PNP Darlingtons in its family, making it the preferred choice for 48–100 V industrial switching where second-breakdown margin and simplified drive are critical.

Availability

BDW47G is available at Aetrix Electronics and suitable for industrial relay drivers, DC motor controllers, solid-state relay input stages, and high-voltage linear regulators requiring stable component supply and long-term obsolescence management.

Supply support for BDW47G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.

The BDW47G belongs to onsemi's legacy silicon power transistor product line, engineered for ruggedized medium-power switching in industrial automation, where high DC gain, thermal robustness, and proven field reliability are prioritized over ultra-high-frequency performance.

FAQ

What is the maximum continuous collector current rating for BDW47G?

The BDW47G is rated for 15 A continuous collector current (I_C) at case temperature T_C = 25°C. Derating is required above 25°C at 0.68 W/°C, and actual usable current depends on heatsink performance and ambient conditions. At T_C = 100°C, the practical I_C limit drops to approximately 7.5 A based on the 85 W power dissipation rating and thermal resistance of 1.47°C/W.

Does BDW47G have built-in base-emitter resistors?

Yes, the BDW47G features monolithic construction with built-in base-emitter shunt resistors. This design ensures reliable turn-off without requiring an external pull-down resistor, simplifying drive circuitry and improving noise immunity in industrial environments where base drive may be weak or intermittent.

What is the collector-emitter sustaining voltage (V_CEO(sus)) specification for BDW47G?

The BDW47G has a minimum collector-emitter sustaining voltage V_CEO(sus) of 100 Vdc at I_C = 30 mAdc and I_B = 0. This parameter defines the maximum voltage the device can block in the off state under specified test conditions and is higher than the BDW46G's 80 V rating, making BDW47G suitable for higher bus voltage applications.

Can BDW47G be used in linear regulator applications?

Yes, the BDW47G is suitable for linear regulator pass element applications due to its 85 W power dissipation rating, 150°C maximum junction temperature, and stable h_FE across temperature. When used with appropriate heatsinking and current limiting, it supports up to 5 A output at 48 V dropout while maintaining safe thermal margins in bench power supplies and test equipment.

Is BDW47G RoHS compliant and lead-free?

Yes, the BDW47G is Pb-Free and RoHS compliant, as confirmed by onsemi's packaging designation "G" suffix and documentation in the BDW42/D datasheet (Rev. 17, August 2016). It meets JEDEC J-STD-609A Class 3 moisture sensitivity and is qualified for lead-free reflow soldering processes.

BDW47G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: TO-220-3

Packaging:: Bulk

Product Status:: Obsolete

Transistor Type:: PNP - Darlington

Current - Collector (Ic) (Max):: 15 A

Voltage - Collector Emitter Breakdown (Max):: 100 V

Vce Saturation (Max) @ Ib, Ic:: 3V @ 50mA, 10A

Current - Collector Cutoff (Max):: 2mA

DC Current Gain (hFE) (Min) @ Ic, Vce:: 1000 @ 5A, 4V

Power - Max:: 85 W

Frequency - Transition:: 4MHz

Operating Temperature:: -55°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

BDW47G FAQ

1.How can I place an order for BDW47G through Aetrix?

Please submit a Request for Quotation (RFQ) for BDW47G 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 BDW47G reliable?

The price and inventory of BDW47G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BDW47G is usually 5 days.

3.What payment methods are accepted for BDW47G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BDW47G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for BDW47G?

BDW47G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your BDW47G 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 BDW47G?

For technical support, including BDW47G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BDW47G requirements.

6.How does Aetrix verify that BDW47G is sourced from the original manufacturer or authorized distributors?

All BDW47G 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 BDW47G meets industry standards.

7.What is the process for return or replacement of BDW47G?

All BDW47G units undergo pre-shipment inspection (PSI). If there is an issue with BDW47G, 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 BDW47G part is unused and in its original packaging.

Return procedure for BDW47G:

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…