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onsemi BDW46
- Part No.:
- BDW46
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-220-3
- Datasheet:
-
BDW46.pdf
- Description:
- TRANS PNP DARL 80V 15A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:4,424
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Product details
Overview
BDW46 from onsemi is a PNP silicon Darlington power transistor in TO-220 package, rated for 80 Vdc collector-emitter sustaining voltage (VCEO(sus)), 15 Adc continuous collector current, and 85 W total device dissipation at TC = 25°C. It delivers high DC current gain (hFE = 1000 min at IC = 5.0 Adc) and low saturation voltage (VCE(sat) = 2.0 Vdc max at IC = 5.0 Adc), suited for medium-power linear and switching applications such as relay drivers and motor controls.
For engineers reviewing the BDW46 datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal characteristics, safe operating area limits, and validated alternative parts for industrial power control designs requiring robust PNP Darlington performance with built-in base-emitter shunt resistors.
Technical Context
The BDW46 operates as a monolithic PNP Darlington pair with integrated base-emitter shunt resistors, enabling simplified biasing and improved turn-off behavior. Its second breakdown limit is defined at VCE = 22.5 Vdc (non-repetitive, 250 ms pulse), and it exhibits Cob = 300 pF at VCB = 10 Vdc, f = 0.1 MHz.
Thermal design is constrained by RJC = 1.47 °C/W junction-to-case resistance and a maximum junction temperature of +150°C. The device's fT = 4.0 MHz (IC = 3.0 Adc, VCE = 3.0 Vdc, f = 1.0 MHz) confirms suitability for low-speed switching rather than RF or high-frequency amplification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 80 Vdc minimum - defines maximum sustainable collector-emitter voltage under switching conditions with IB = 0 |
| IC (max) | 15 Adc continuous - sets absolute upper limit for steady-state collector current without forced cooling |
| PD @ TC=25°C | 85 W - maximum power dissipation achievable only with case held at 25°C; derates 0.68 W/°C above that |
| hFE (min) | 1000 @ IC = 5.0 Adc - ensures low base drive current requirement for high-current switching |
| VCE(sat) (max) | 2.0 Vdc @ IC = 5.0 Adc, IB = 10 mAdc - determines conduction loss and heat generation in saturated switch mode |
| RJC | 1.47 °C/W - critical for heatsink sizing; 10°C rise per 6.8 W dissipated into case |
Pinout & Package
BDW46 is housed in a TO-220 compact plastic package (Case 221A, Style 1), with leads arranged in standard emitter-collector-base (ECB) order when viewed from the front (flat side) with mounting tab vertical and pins downward.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Lead 1 (left) | Emitter | Main current exit path; electrically connected to mounting tab - requires isolation if heatsink is grounded |
| Lead 2 (center) | Collector | Main current entry path; internally tied to die substrate and mounting tab - must be insulated from heatsink unless common ground intended |
| Lead 3 (right) | Base | Control input; includes internal shunt resistor to improve turn-off speed and prevent spurious conduction |
Key Features
| Feature | Design Value |
|---|---|
| Monolithic Darlington construction | Integrates driver and output transistors on single die, eliminating external interconnects and improving reliability |
| Built-in base-emitter shunt resistor | Reduces storage time and enables faster turn-off without external pull-down components |
| High VCEO(sus) rating | 80 Vdc minimum sustains transient overvoltage during inductive load switching without breakdown |
| Pb-Free / RoHS-compliant packaging | TO-220G variant meets environmental compliance requirements for industrial and consumer end equipment |
Applications
| Relay Driver Circuit | DC Motor Speed Control |
|---|---|
Use Scenario: Driving 24 Vdc industrial relays with coil currents up to 12 A. IC Role / Device Role / Timing Role: PNP Darlington switch providing high-current sinking capability with minimal base drive. Use Value: Delivers 1000× current gain to reduce microcontroller GPIO loading while maintaining <2.0 V saturation drop across collector-emitter. | Use Scenario: Controlling bidirectional brushed DC motors in HVAC actuators using complementary BDW42/BDW46 pairs. IC Role / Device Role / Timing Role: Low-speed power switch in H-bridge half-bridge leg, handling peak currents ≤15 A. Use Value: Withstands 80 Vdc flyback transients and dissipates ≤85 W with appropriate heatsinking, enabling compact mechanical design. |
| Linear Power Regulator Pass Element | Industrial Lamp Dimmer |
Use Scenario: Series pass transistor in adjustable 0–30 V, 5 A bench power supply. IC Role / Device Role / Timing Role: Voltage-controlled current source operating in active region with fixed base bias. Use Value: Maintains stable hFE ≥1000 across −55°C to +150°C, supporting wide ambient temperature operation without gain collapse. | Use Scenario: Phase-angle dimming of 120 VAC incandescent loads via TRIAC gate triggering circuitry. IC Role / Device Role / Timing Role: High-gain DC amplifier stage converting zero-crossing logic signals into TRIAC gate pulses. Use Value: Cob = 300 pF minimizes capacitive coupling noise into sensitive trigger paths, improving EMI immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP Darlington power switching applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BDW47G | Same TO-220 package and PNP polarity, but rated for 100 Vdc VCEO(sus); otherwise identical max ratings and gain profile | Preferred where higher voltage margin is required against inductive kickback or line surges | Select BDW47G when system-level transients exceed 80 V but remain below 100 V - no layout change needed |
| MJD47T4G | TO-252 (DPAK) surface-mount package; same 100 Vdc VCEO(sus), 15 A IC rating, but lower PD = 30 W and RJC = 4.2 °C/W | Suitable for space-constrained PCBs where thermal management uses board copper instead of external heatsink | Choose MJD47T4G for automated SMT assembly and moderate power density; verify thermal relief area supports 30 W dissipation |
Compared with BDW46, BDW47G offers higher voltage headroom without altering footprint or drive requirements, while MJD47T4G trades package form factor and thermal capability for SMT compatibility - both require re-evaluation of heatsinking and PCB layout.
Availability
BDW46 is available at Aetrix Electronics and suitable for industrial motor controls, relay interface modules, and linear power supply designs requiring stable component supply with long lifecycle visibility.
Supply support for BDW46 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 focused on energy-efficient electronics, delivering discrete, analog, and logic solutions for automotive, industrial, cloud, and IoT applications.
The BDW46 belongs to onsemi's legacy silicon power transistor family designed specifically for cost-sensitive, medium-power linear and switching applications where high DC gain and ruggedness outweigh high-frequency performance.
FAQ
What is the maximum continuous collector current rating for BDW46?
The BDW46 has a maximum continuous collector current (IC) rating of 15 Adc at TC = 25°C. This rating assumes proper heatsinking and derates linearly by 0.68 W/°C above 25°C case temperature. At elevated case temperatures, the allowable current must be reduced to maintain junction temperature ≤150°C - for example, at TC = 100°C, usable IC drops to approximately 4.5 A based on thermal resistance and power limits.
Does BDW46 include internal base-emitter resistors?
Yes, the BDW46 features monolithic construction with built-in base-emitter shunt resistors. This design improves turn-off speed by actively discharging stored base charge, reducing storage time and preventing false triggering in noisy environments. The resistor value is not specified in the datasheet but is optimized for typical drive conditions with IC/IB = 250.
What is the safe operating area (SOA) limitation for BDW46 at DC operation?
The BDW46's DC safe operating area is thermally limited and defined by its 85 W power dissipation ceiling at TC = 25°C. At VCE = 40 Vdc, the maximum allowable IC is ~2.1 A; at VCE = 20 Vdc, it rises to ~4.2 A. These boundaries are derived from Figure 6 in the datasheet and assume single-pulse, TJ(pk) ≤ 200°C. Second breakdown does not constrain DC operation - only thermal limits apply.
Can BDW46 be used in complementary pair configurations with BDW42G?
Yes, BDW46 is explicitly designed as the PNP complement to the NPN BDW42G. Both share identical TO-220 packaging, thermal characteristics (RJC = 1.47 °C/W), and current/voltage ratings except for polarity and VCEO(sus) (80 V for BDW46 vs. 100 V for BDW42G). Their matched gain profiles and switching times enable balanced push-pull or H-bridge implementations without additional bias compensation.
Is BDW46 RoHS-compliant and lead-free?
Yes, the BDW46G variant is Pb-free and RoHS-compliant, as confirmed in the ordering information and marking diagram sections of the official onsemi datasheet. The "G" suffix denotes green packaging, and the device meets EU Directive 2011/65/EU requirements. Standard BDW46 (non-G) may refer to legacy leaded versions - always specify BDW46G for RoHS-conforming designs.
BDW46 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Transistor Type:
- PNP - Darlington
- Current - Collector (Ic) (Max):
- 15 A
- Voltage - Collector Emitter Breakdown (Max):
- 80 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
BDW46 FAQ
1.How can I place an order for BDW46 through Aetrix?
Please submit a Request for Quotation (RFQ) for BDW46 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 BDW46 reliable?
The price and inventory of BDW46 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BDW46 is usually 5 days.
3.What payment methods are accepted for BDW46?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BDW46 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BDW46?
BDW46 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BDW46 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 BDW46?
For technical support, including BDW46 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BDW46 requirements.
6.How does Aetrix verify that BDW46 is sourced from the original manufacturer or authorized distributors?
All BDW46 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 BDW46 meets industry standards.
7.What is the process for return or replacement of BDW46?
All BDW46 units undergo pre-shipment inspection (PSI). If there is an issue with BDW46, 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 BDW46 part is unused and in its original packaging.
Return procedure for BDW46:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BDW46 Tags
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MMBT3906LT1G
onsemi
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Diodes Incorporated
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MMBT3904LT1G
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MMBT3906-7-F
Diodes Incorporated
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MMBT3904-TP
Micro Commercial Co
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MMBT2222A-7-F
Diodes Incorporated
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BC846BLT1G
onsemi
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BC847B,215
Nexperia USA Inc.
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SMMBT3904LT1G
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MMBTA06LT1G
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MMBT2222ALT1G
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