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onsemi BUV48
- Part No.:
- BUV48
- Manufacturer:
- onsemi
- Category:
- Single Bipolar Transistors
- Package:
- TO-3P-3, SC-65-3
- Datasheet:
-
BUV48.pdf
- Description:
- TRANS NPN 400V 15A TO-3PB
- Quantity:
- Payment:
- Shipping:
Inventory:10,950
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Product details
Overview
BUV48 from ON Semiconductor is an NPN silicon power transistor designed for high-voltage, high-speed switching in inductive circuits-specifically optimized for line-operated SWITCHMODE applications. It delivers 400 VCEO(sus), 15 A continuous collector current, and a typ. 60 ns inductive fall time at 25°C, enabling fast turn-off in deflection circuits and motor controls.
For engineers reviewing the BUV48 datasheet, pinout, applications, or equivalent options, this device is selected where clamped inductive SOA integrity, reverse-biased safe operating area performance at 100°C, and sub-100 ns inductive fall time are critical design requirements.
Technical Context
The BUV48 operates as a high-voltage NPN switch with base-emitter forward bias during conduction and reverse bias during turn-off under inductive load conditions. Its design emphasizes controlled second breakdown behavior and guaranteed RBSOA performance up to 100°C, validated under clamped 300 V conditions with 180 µH inductance.
It features a TO-218 (Case 340D–02) package with low 1°C/W junction-to-case thermal resistance, supporting high-power dissipation (150 W at TC = 25°C). Switching parameters-including tfi = 60 ns and tc = 120 ns-are specified for inductive loads, not resistive benchmarks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO(sus) | 400 Vdc - Sustaining voltage under inductive switching with IC = 200 mA, defining maximum safe bus voltage in clamped flyback topologies |
| IC Continuous | 15 Adc - Maximum DC collector current at TC = 25°C, derating to 75 W at TC = 100°C per 1 W/°C slope |
| tfi (Inductive Fall) | 60 ns typ. at 25°C - Time for collector current to fall from 90% to 10% under clamped 300 V, 10 A, 180 µH conditions |
| RθJC | 1°C/W max - Enables direct heatsink mounting with minimal thermal interface resistance for high-reliability industrial power stages |
| TJ Range | –65°C to +175°C - Full specification of SOA, saturation voltage, and leakage at 125°C supports automotive under-hood and industrial ambient extremes |
| VCEX | 850 Vdc - Collector-emitter breakdown voltage with VBE = –1.5 V, confirming ruggedness against voltage transients in offline converters |
| PD @ TC = 25°C | 150 Watts - Total power dissipation capability when case temperature is maintained at 25°C via heatsinking |
Pinout & Package
Package: TO-218 (Case 340D–02), isolated metal tab, 3-terminal through-hole power package with standardized mechanical dimensions per ON Semiconductor datasheet BUV48/D.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Collector (Tab) | Main high-current output path | Electrically connected to metal tab; must be electrically isolated from heatsink unless circuit design permits common-collector configuration |
| Base | Control input for bipolar conduction | Requires active drive (≥2 A peak) to achieve forced hFE = 5; reverse bias (–1.5 V) required during turn-off to minimize storage time |
| Emitter | Current return path and reference node | Low-inductance connection critical for stable switching; often tied directly to ground plane in high-dI/dt applications |
Key Features
| Feature | Design Value |
|---|---|
| Clamped Inductive SOA | Guaranteed operation up to 100°C with Vclamp = 300 V and defined IC/VCE limits-enables reliable fault handling in SMPS without avalanche stress |
| Fast Inductive Turn-Off | 60 ns typ. tfi and 120 ns typ. tc at 25°C-reduces crossover losses in high-frequency converters operating above 20 kHz |
| High-Voltage Ruggedness | 850 V VCEX rating with reverse-biased base-supports 400 VAC line applications with margin against surge and ringing |
| Thermal Robustness | 150 W PD at TC = 25°C and 1°C/W RθJC-allows compact heatsink designs in space-constrained industrial inverters |
| Extended Temperature Operation | Full electrical specs guaranteed from –65°C to +175°C junction, including leakage and SOA at 125°C-suitable for harsh-environment motor drives |
Applications
| Switching Regulators | Inverters |
|---|---|
Use Scenario: High-efficiency 400 VDC offline flyback or forward converter operating at 50–100 kHz with clamped inductive turn-off. IC Role / Device Role / Timing Role: Main power switch handling primary-side energy transfer; critical for minimizing tc-related switching loss. Use Value: 60 ns tfi and guaranteed RBSOA at 100°C reduce thermal stress and improve efficiency over standard power transistors. |
Use Scenario: Three-phase motor drive inverter stage feeding 230 VAC induction motors in HVAC or industrial pumps. IC Role / Device Role / Timing Role: High-voltage leg switch in IGBT-like half-bridge topology; requires robust VCEX and fast tsv control. Use Value: 850 V VCEX and 1°C/W thermal resistance support reliable operation under bus overvoltage and high ambient temperatures. |
| Solenoid & Relay Drivers | Deflection Circuits |
Use Scenario: High-energy solenoid actuation in industrial automation, requiring rapid de-energization with controlled back-EMF clamping. IC Role / Device Role / Timing Role: Inductive load switch with active base reverse bias during turn-off to suppress storage time. Use Value: 120 ns tc ensures precise timing control and minimizes coil dwell time uncertainty in closed-loop position systems. |
Use Scenario: Horizontal deflection yoke driver in CRT-based test equipment or legacy broadcast monitors. IC Role / Device Role / Timing Role: High-slew-rate switch sustaining >300 V with sub-100 ns fall time to maintain linearity and geometry stability. Use Value: 60 ns tfi and 15 A IC capability enable sharp edge fidelity and reduced retrace distortion in high-resolution displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage NPN switching transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BUV48A | Higher VCEO(sus) = 450 V, VCEX = 1000 V, and improved tc = 120 ns typ. at 100°C vs. BUV48's 25°C spec | Preferred for 480 VAC input systems or designs requiring extended voltage margin beyond 400 V | Select BUV48A when higher blocking voltage and guaranteed high-temperature inductive switching performance are required |
| MJE13009 | Lower VCEO = 400 V, no guaranteed RBSOA at 100°C, tf = 300 ns typ. (resistive), TO-220 package (RθJC = 2.5°C/W) | Suitable for lower-cost, lower-frequency (<20 kHz) SMPS where thermal and SOA margins are less critical | Choose MJE13009 only for cost-sensitive, non-clamped, low-duty-cycle applications-not a drop-in replacement for BUV48 |
Compared with BUV48A, the BUV48 offers tighter cost control and sufficient voltage margin for 230 VAC-derived 400 VDC bus designs, while MJE13009 lacks the thermal and SOA rigor needed for sustained high-frequency inductive switching-making BUV48 the optimal balance of ruggedness, speed, and manufacturability in industrial SWITCHMODE systems.
Availability
BUV48 is available at Aetrix Electronics and suitable for switching regulators, inverters, solenoid drivers, and deflection circuits requiring stable component supply across industrial OEM production cycles.
Supply support for BUV48 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 (now onsemi) is a global semiconductor supplier specializing in power management, analog, sensor, and connectivity solutions for automotive, industrial, and cloud power applications.
The BUV48 belongs to the SWITCHMODE II series-designed specifically for high-reliability, high-voltage inductive switching in offline power conversion, motor control, and deflection systems where SOA integrity and thermal stability are non-negotiable.
FAQ
What is the maximum clamped collector-emitter voltage the BUV48 can sustain during inductive turn-off?
The BUV48 is characterized for clamped inductive switching at Vclamp = 300 V, with Reverse Bias Safe Operating Area (RBSOA) data validated under those conditions. Its VCEX rating is 850 V at VBE = –1.5 V, but actual sustained clamping voltage in application must remain ≤300 V to stay within the guaranteed RBSOA envelope. Exceeding this risks second breakdown.
Does the BUV48 require reverse base bias during turn-off, and why?
Yes-the BUV48 datasheet specifies reverse base bias (VBE(off) = –1.5 V) during inductive turn-off to minimize storage time and ensure predictable tsv. Without it, minority carrier removal slows, increasing tc and crossover losses. The BUV48's SOA and switching times are guaranteed only under this condition.
Can the BUV48 replace the BUV48A in a design originally specified for the BUV48A?
No-BUV48 has lower VCEO(sus) (400 V vs. 450 V) and VCEX (850 V vs. 1000 V), and its inductive switching specs (e.g., tc) are rated at 25°C, whereas BUV48A guarantees them at 100°C. Substituting BUV48 may compromise reliability in high-temperature or high-voltage applications.
What is the thermal resistance from junction to case (RθJC) for the BUV48, and how does it impact heatsink selection?
The BUV48 has RθJC = 1°C/W maximum in its TO-218 package. This means for a 100 W dissipation at TC = 100°C, junction temperature rises only 100°C above case-so with a 25°C ambient and 2°C/W heatsink + interface, TJ = 125°C. Accurate heatsink sizing must account for this low RθJC to avoid exceeding 175°C absolute max.
Is the BUV48 suitable for use in automotive under-hood applications?
Yes-the BUV48 is qualified for TJ = –65°C to +175°C and fully specified at 125°C for leakage, SOA, and saturation voltage. Its rugged VCEX = 850 V and clamped RBSOA make it viable for 48 V or 400 V auxiliary converters in engine compartments, provided PCB layout and heatsinking meet thermal derating curves in Figure 15.
BUV48 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-3P-3, SC-65-3
- Packaging:
- Bulk
- Product Status:
- Active
- Transistor Type:
- NPN
- Current - Collector (Ic) (Max):
- 15 A
- Voltage - Collector Emitter Breakdown (Max):
- 400 V
- Vce Saturation (Max) @ Ib, Ic:
- 5V @ 3A, 15A
- Current - Collector Cutoff (Max):
- 200µA
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- 8 @ 10A, 5V
- Power - Max:
- 150 W
- Frequency - Transition:
- -
- Operating Temperature:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-3PB
BUV48 FAQ
1.How can I place an order for BUV48 through Aetrix?
Please submit a Request for Quotation (RFQ) for BUV48 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 BUV48 reliable?
The price and inventory of BUV48 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUV48 is usually 5 days.
3.What payment methods are accepted for BUV48?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUV48 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUV48?
BUV48 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUV48 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 BUV48?
For technical support, including BUV48 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUV48 requirements.
6.How does Aetrix verify that BUV48 is sourced from the original manufacturer or authorized distributors?
All BUV48 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 BUV48 meets industry standards.
7.What is the process for return or replacement of BUV48?
All BUV48 units undergo pre-shipment inspection (PSI). If there is an issue with BUV48, 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 BUV48 part is unused and in its original packaging.
Return procedure for BUV48:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BUV48 Tags
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