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Infineon Technologies BUZ73AL
- Part No.:
- BUZ73AL
- Manufacturer:
- Infineon Technologies
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3
- Datasheet:
-
BUZ73AL.pdf
- Description:
- MOSFET N-CH 200V 5.5A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,238
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Product details
Overview
BUZ73AL from Infineon Technologies is an N-channel enhancement-mode SIPMOS power MOSFET rated for 200 V drain-source voltage, 5.5 A continuous drain current at TC = 37 °C, and 0.6 Ω maximum RDS(on) at VGS = 5 V and ID = 3.5 A. It features logic-level gate drive compatibility, avalanche energy rating of 120 mJ (single pulse), and integrated body diode with 1.7 V forward voltage at IF = 14 A - used in DC-DC converter primary switches and motor control half-bridges.
For engineers reviewing the BUZ73AL datasheet, BUZ73AL pinout, BUZ73AL application, or BUZ73AL equivalent, key selection criteria include its 200 V breakdown voltage, 5.5 A thermal-current capability, 0.6 Ω on-resistance at logic-level gate drive, avalanche ruggedness, and TO-220-3 package thermal performance.
Technical Context
This device operates as a unidirectional high-side or low-side switching element in hard-switched topologies. Its 1.6 V typical gate threshold voltage enables direct interface with 3.3 V/5 V microcontrollers, while the 630 pF typical input capacitance and 15 ns typical turn-on delay support switching frequencies up to 100 kHz in non-resonant converters.
The integrated body diode exhibits 140 ns reverse recovery time and 0.7 µC reverse recovery charge under 100 A/µs di/dt, making it suitable for freewheeling paths where controlled commutation is required without external Schottky supplementation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 200 V - supports 170 VAC rectified bus and 24 V industrial systems with margin |
| ID (TC = 37 °C) | 5.5 A - continuous conduction capability at heatsink temperature of 37 °C |
| RDS(on) max | 0.6 Ω at VGS = 5 V, ID = 3.5 A - defines conduction loss of ≤10.5 W at full rated current |
| EAS | 120 mJ single-pulse avalanche energy - enables robust operation during inductive load turn-off transients |
| VGS(th) | 1.2–2.0 V - ensures reliable turn-on with 3.3 V logic and immunity to noise-induced false triggering |
| Ciss | 630–840 pF - determines gate drive strength requirement and switching speed trade-off |
| trr | 140 ns - limits diode commutation losses in synchronous rectification and flyback snubbing |
Pinout & Package
BUZ73AL is housed in a Pb-free PG-TO220-3 package with standard through-hole mounting, insulated tab, and thermal resistance RthJC ≤ 3.1 K/W. Pin 1 = Gate, Pin 2 = Drain, Pin 3 = Source.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (G) | Gate terminal | Controls channel conduction; requires ≤20 V gate-source voltage; logic-level compatible |
| Pin 2 (D) | Drain terminal | High-voltage power input node; electrically connected to metal tab for thermal path |
| Pin 3 (S) | Source terminal | Power return/reference node; ties to ground or low-side switch node in half-bridge |
Key Features
| Feature | Design Value |
|---|---|
| Avalanche-rated operation | 120 mJ single-pulse EAS enables unclamped inductive switching without external clamping |
| Logic-level gate drive | VGS(th) ≤ 2.0 V allows direct drive from 3.3 V/5 V MCUs without level-shifting circuitry |
| Integrated body diode | IF = 5.5 A continuous, VSD = 1.7 V @ 14 A - supports freewheeling in buck, flyback, and H-bridge topologies |
| Thermal robustness | RthJC ≤ 3.1 K/W and Tj = −55 to +150 °C rating suit industrial motor drives and power supplies |
Applications
| Motor Control Half-Bridge | DC-DC Converter Primary Switch |
|---|---|
Use Scenario: Driving brushed DC motors in industrial actuators with PWM at 20–50 kHz. IC Role / Device Role / Timing Role: Low-side switching element in half-bridge configuration, synchronized with high-side counterpart. Use Value: 0.6 Ω RDS(on) minimizes I²R loss at 5.5 A load current; avalanche rating absorbs back-EMF spikes during abrupt stop commands. | Use Scenario: Primary-side switch in offline 24 V output flyback converter delivering 60 W. IC Role / Device Role / Timing Role: Main power switch turning on/off 100 kHz AC line-derived DC bus. Use Value: 200 V V(BR)DSS provides 40% margin over 300 V DC bus; 15 ns td(on) enables precise duty-cycle control. |
| LED Driver Power Stage | Industrial Solenoid Driver |
Use Scenario: Constant-current LED string driver for signage with 48 V input and 350 mA output. IC Role / Device Role / Timing Role: High-side switch modulating current through series-connected LEDs. Use Value: Logic-level gate enables direct PWM from 3.3 V MCU; 1.7 V VSD supports efficient freewheeling during off-time. | Use Scenario: 24 V solenoid actuation in PLC I/O modules with 100 ms on/off cycles. IC Role / Device Role / Timing Role: Single-ended power switch controlling inductive load via microcontroller GPIO. Use Value: 120 mJ EAS safely clamps 24 V × 2 A × 10 ms energy during de-energization without snubber network. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel logic-level power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STP55NF06L | 60 V VDS, 55 A ID, 0.014 Ω RDS(on) - lower voltage, higher current, much lower on-resistance | Not suitable for 200 V bus; limited to 48 V systems | Select only if operating voltage ≤60 V and conduction loss dominates design |
| IRFZ44N | 55 V VDS, 49 A ID, 0.028 Ω RDS(on), no specified EAS rating | Lacks avalanche ruggedness; unsuitable for inductive switching without external protection | Use only in resistive or lightly inductive loads with clamped turn-off |
Compared with STP55NF06L and IRFZ44N, BUZ73AL uniquely balances 200 V capability, logic-level drive, and certified avalanche energy - making it the only viable option among the three for unclamped 100–200 V inductive switching at ≤5.5 A.
Availability
BUZ73AL is available at Aetrix Electronics and suitable for motor control half-bridges, offline DC-DC converter primary stages, and industrial solenoid drivers requiring stable component supply across extended production lifecycles.
Supply support for BUZ73AL 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
Infineon Technologies is a German semiconductor manufacturer specializing in power management, automotive electronics, and industrial control ICs and discrete devices.
BUZ73AL belongs to the SIPMOS® logic-level power MOSFET product line, designed specifically for robust, low-gate-voltage switching in industrial power conversion and motion control applications.
FAQ
Is BUZ73AL suitable for use in a 100 kHz flyback converter?
Yes. With 15 ns turn-on delay, 60 ns rise time, and 630 pF input capacitance, BUZ73AL supports reliable 100 kHz switching in flyback converters when driven by ≥1 A peak gate current. Its 200 V V(BR)DSS provides sufficient margin over typical 300–375 V DC bus voltages after rectification.
Does BUZ73AL require a gate resistor for safe operation?
Yes. A 10–47 Ω series gate resistor is recommended to damp ringing, limit peak gate current, and control switching speed. The 50 Ω RGS condition in the datasheet's dynamic test setup confirms this value as appropriate for standard 5 V logic drive with moderate dV/dt control.
Can BUZ73AL replace BUZ73A in existing designs?
Yes, BUZ73AL is a Pb-free drop-in replacement for BUZ73A. Both share identical electrical specifications, thermal ratings, and TO-220-3 pinout. The "L" suffix denotes RoHS-compliant packaging; no layout or drive circuit changes are needed for migration.
What is the maximum junction temperature during avalanche operation?
During single-pulse avalanche events, junction temperature must remain ≤150 °C. The 120 mJ EAS rating is validated at Tj = 25 °C; derating curves on page 8 show usable energy drops to ~70 mJ at Tj = 125 °C - design margins must account for initial Tj and transient thermal impedance.
BUZ73AL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Infineon Technologies
- Series:
- SIPMOS®
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 200 V
- Current - Continuous Drain (Id) @ 25°C:
- 5.5A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 5V
- Rds On (Max) @ Id, Vgs:
- 600mOhm @ 3.5A, 5V
- Vgs(th) (Max) @ Id:
- 2V @ 1mA
- Gate Charge (Qg) (Max) @ Vgs:
- -
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 840 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 40W (Tc)
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- PG-TO220-3
BUZ73AL FAQ
1.How can I place an order for BUZ73AL through Aetrix?
Please submit a Request for Quotation (RFQ) for BUZ73AL 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 BUZ73AL reliable?
The price and inventory of BUZ73AL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BUZ73AL is usually 5 days.
3.What payment methods are accepted for BUZ73AL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BUZ73AL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BUZ73AL?
BUZ73AL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BUZ73AL 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 BUZ73AL?
For technical support, including BUZ73AL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BUZ73AL requirements.
6.How does Aetrix verify that BUZ73AL is sourced from the original manufacturer or authorized distributors?
All BUZ73AL 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 BUZ73AL meets industry standards.
7.What is the process for return or replacement of BUZ73AL?
All BUZ73AL units undergo pre-shipment inspection (PSI). If there is an issue with BUZ73AL, 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 BUZ73AL part is unused and in its original packaging.
Return procedure for BUZ73AL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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