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onsemi BDW24BTU
- Part No.:
- BDW24BTU
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
BDW24BTU.pdf
- Description:
- TRANS PNP 80V 6A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,828
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Product details
Overview
BDW24BTU from Fairchild Semiconductor is a PNP epitaxial silicon Darlington transistor in TO-220 package, rated for -60 V VCEO, -6 A continuous collector current, 50 W power dissipation at TC=25°C, and 150°C maximum junction temperature. It serves as a high-current switching device in hammer drivers and audio amplifier output stages.
For engineers reviewing the BDW24BTU datasheet, pinout, applications, or equivalent options, key selection criteria include VCEO rating, DC current gain (hFE ≥750 at IC = -2 A), saturation voltage (VCE(sat) ≤ -2 V), thermal derating behavior, and complementary pairing with BDW23A series devices.
Technical Context
The BDW24BTU implements a monolithic PNP Darlington configuration with integrated emitter-base shunt diode, enabling high current gain and low base drive requirements. Its safe operating area (SOA) supports pulsed currents up to -8 A with defined pulse width and duty cycle limits.
Designed for linear and switching operation, it features VBE(sat) = -2.5 V at IC = -2 A / IB = -8 mA and parallel diode forward voltage VF = -1.8 V at IF = -2 A - critical for flyback energy handling in inductive load switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -60 V - Maximum allowable collector-emitter voltage before breakdown under open-base condition; defines safe DC switching margin for 48 V rail applications. |
| IC (DC) | -6 A - Continuous collector current capability; sets thermal design baseline for heatsink sizing at TC ≤ 25°C. |
| PC | 50 W - Maximum power dissipation at case temperature 25°C; requires thermal derating above 25°C per published curve (0.4 W/°C). |
| hFE | 750 (min) at IC = -2 A - Ensures low base drive current requirement (~2.7 mA) for full conduction, reducing driver stage complexity. |
| VCE(sat) | -2 V (max) at IC = -2 A / IB = -8 mA - Limits conduction loss to ≤4 W at 2 A, critical for efficiency in Class AB audio output stages. |
| VF (diode) | -1.8 V at IF = -2 A - Specifies forward drop of integrated anti-parallel emitter-base diode used for inductive kick clamping. |
Pinout & Package
BDW24BTU is housed in a standard TO-220 package with insulated tab, featuring three terminals: 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 circuit topology permits.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Base) | Control input | Receives base current to enable Darlington pair conduction; requires current-limiting resistor when driven from logic or op-amp outputs. |
| 2 (Collector) | High-side switched node | Connected to metal tab; must be electrically isolated from heatsink unless collector is referenced to system ground. |
| 3 (Emitter) | Current return path | Serves as common emitter for load connection; polarity reversal relative to NPN devices enables high-side switching topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Darlington structure | Integrates driver and output transistors on single die, eliminating external interconnects and ensuring matched thermal tracking. |
| Complementary pairing | Explicitly designed as PNP counterpart to BDW23A (NPN), enabling push-pull output stages without discrete bias network redesign. |
| Integrated emitter-base diode | Provides intrinsic flyback path for inductive loads, eliminating need for external clamp diode in solenoid/relay driver circuits. |
| TO-220 mechanical standardization | Enables drop-in replacement in legacy designs using industry-standard mounting hardware and thermal interface materials. |
Applications
| Hammer Drivers | Audio Amplifier Output Stages |
|---|---|
Use Scenario: Driving electromagnetic solenoids in industrial stamping, riveting, or pneumatic valve actuators requiring high peak current pulses. IC Role / Device Role / Timing Role: High-current PNP switch controlling solenoid coil current path with fast turn-off enabled by integrated diode clamping. Use Value: VCEO = -60 V and ICP = -8 A support 48 V systems with 200% surge tolerance; VF = -1.8 V limits flyback energy dissipation. | Use Scenario: Complementary output pair in Class AB audio amplifiers delivering >10 W into 4 Ω or 8 Ω loads. IC Role / Device Role / Timing Role: PNP output transistor in push-pull stage, paired with BDW23A, providing symmetrical positive/negative swing capability. Use Value: hFE ≥750 at IC = -2 A ensures stable bias point; VCE(sat) ≤ -2 V minimizes crossover distortion and thermal stress. |
| DC Motor Control (Unidirectional) | Power Supply Pass Transistor |
Use Scenario: High-side current control for brushed DC motors in battery-powered tools or conveyor systems. IC Role / Device Role / Timing Role: PNP series pass element regulating motor voltage via base current modulation from PWM controller. Use Value: 50 W power rating allows sustained 6 A operation with appropriate heatsinking; TJ = 150°C supports industrial ambient conditions. | Use Scenario: Linear regulator pass element in high-current, low-noise lab power supplies or instrumentation references. IC Role / Device Role / Timing Role: Series pass transistor dissipating excess voltage between unregulated input and regulated output rail. Use Value: Low VCE(sat) reduces dropout voltage; SOA compliance ensures reliability during transient overloads and startup surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP Darlington transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BDW24B | VCEO = -80 V (vs. -60 V); otherwise identical pinout, gain, and thermal specs. | Supports higher bus voltages (e.g., 72 V industrial systems); may require revised gate/base drive protection. | Select BDW24B only if system VCC exceeds 55 V; BDW24BTU remains optimal for 48 V and below. |
| MJD127G | TO-263 package (surface-mount); VCEO = -60 V, IC = -6 A, hFE = 1000–4000 (wider spread); no integrated diode. | Requires external flyback diode; suited for automated SMT assembly but lacks BDW24BTU's through-hole robustness and integrated clamping. | Choose MJD127G for space-constrained PCBs where reflow compatibility is mandatory; retain BDW24BTU for prototyping, repair, or high-reliability through-hole designs. |
Compared with BDW24B and MJD127G, BDW24BTU offers the best balance of voltage margin, integrated protection, and mechanical serviceability for 48 V industrial switching - neither over-specified nor package-constrained.
Availability
BDW24BTU is available at Aetrix Electronics and suitable for hammer drivers, audio amplifier output stages, and DC motor control applications requiring stable component supply, long-term industrial availability, and consistent parametric performance across production lots.
Supply support for BDW24BTU 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 discrete devices, analog ICs, and interface solutions before its acquisition by ON Semiconductor in 2016.
The BDW24BTU belongs to Fairchild's legacy power transistor family engineered for ruggedized industrial switching and audio output applications, emphasizing high current gain, thermal stability, and mechanical interoperability.
FAQ
What is the maximum collector-emitter voltage rating for BDW24BTU?
The BDW24BTU has a guaranteed VCEO rating of -60 V at TC = 25°C, verified per Fairchild's Rev. A datasheet. This rating applies under open-base conditions and defines the absolute maximum DC voltage the device can block in switching applications. Exceeding this value risks avalanche breakdown and permanent damage. Derating is required at elevated case temperatures per the published power derating curve.
Does BDW24BTU include an integrated clamp diode?
Yes, BDW24BTU incorporates an integrated emitter-base shunt diode with VF = -1.8 V at IF = -2 A. This diode provides inherent flyback energy clamping for inductive loads such as solenoids and relays, eliminating the need for an external freewheeling diode in many hammer driver and motor control designs. Its presence is confirmed in the Electrical Characteristics table and Typical Characteristics section of the official datasheet.
Is BDW24BTU pin-compatible with BDW23A series transistors?
No - BDW24BTU (PNP) and BDW23A (NPN) are complementary devices intended for pairing in push-pull circuits, not pin-compatible replacements. They share the same TO-220 package outline and terminal numbering (Base–Collector–Emitter), but polarity reversal means direct substitution would invert circuit functionality. Their pinout alignment enables matched layout in complementary amplifier or H-bridge driver designs.
What is the minimum DC current gain (hFE) of BDW24BTU at 2 A collector current?
The minimum hFE for BDW24BTU is 750 at VCE = -3 V and IC = -2 A, as specified in the Electrical Characteristics table. This high gain ensures low base drive current requirements (~2.7 mA) for full conduction, simplifying driver stage design. Typical values reach 2000–5000 under the same conditions, but design margins must be based on the guaranteed minimum.
Can BDW24BTU be used in surface-mount designs?
No - BDW24BTU is exclusively offered in the through-hole TO-220 package with leads designed for axial insertion and soldering. It is not available in surface-mount variants. For SMT implementation, consider alternatives like MJD127G (TO-263) or NSS12601CF8 (SOT-89), though these differ in voltage rating, gain, and integrated protection features compared to BDW24BTU.
BDW24BTU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 6 A
- Voltage - Collector Emitter Breakdown (Max):
- 80 V
- Vce Saturation (Max) @ Ib, Ic:
- 3V @ 60mA, 6A
- Current - Collector Cutoff (Max):
- 500µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 750 @ 2A, 3V
- Power - Max:
- 50 W
- Frequency - Transition:
- -
- Operating Temperature:
- 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
BDW24BTU FAQ
1.How can I place an order for BDW24BTU through Aetrix?
Please submit a Request for Quotation (RFQ) for BDW24BTU 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 BDW24BTU reliable?
The price and inventory of BDW24BTU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BDW24BTU is usually 5 days.
3.What payment methods are accepted for BDW24BTU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BDW24BTU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BDW24BTU?
BDW24BTU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BDW24BTU 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 BDW24BTU?
For technical support, including BDW24BTU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BDW24BTU requirements.
6.How does Aetrix verify that BDW24BTU is sourced from the original manufacturer or authorized distributors?
All BDW24BTU 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 BDW24BTU meets industry standards.
7.What is the process for return or replacement of BDW24BTU?
All BDW24BTU units undergo pre-shipment inspection (PSI). If there is an issue with BDW24BTU, 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 BDW24BTU part is unused and in its original packaging.
Return procedure for BDW24BTU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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