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STMicroelectronics STW46NF30
- Part No.:
- STW46NF30
- Manufacturer:
- STMicroelectronics
- Category:
- FETs, MOSFETs
- Package:
- TO-247-3
- Datasheet:
-
STW46NF30.pdf
- Description:
- MOSFET N-CH 300V 42A TO247
- Quantity:
- Payment:
- Shipping:
Inventory:52
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Product details
Overview
STW46NF30 from STMicroelectronics is an automotive-grade N-channel 300 V, 71 mΩ typ., 42 A Power MOSFET in TO-247 package, designed as a primary switch in high-efficiency isolated DC-DC converters for telecom and computing systems. It features AEC-Q101 qualification, 100% avalanche testing, 175 °C max junction temperature, and exceptional dv/dt capability up to 10 V/ns.
For engineers reviewing the STW46NF30 datasheet, STW46NF30 pinout, STW46NF30 application, or STW46NF30 equivalent, key selection criteria include RDS(on) (71 mΩ typ.), Qg (90 nC), avalanche energy rating (290 mJ), thermal resistance (RthJC = 0.5 °C/W), and TO-247 mechanical compatibility with high-power heatsinking requirements.
Technical Context
This STripFET II device uses charge-compensated trench-gate architecture to minimize Ciss (3200 pF) and gate charge while maintaining low RDS(on). Its rugged body diode supports fast recovery (trr = 215 ns at 25 °C) and high pulsed source-drain current (ISDM = 136 A).
The MOSFET operates across -55 °C to 175 °C junction range and sustains unclamped inductive switching stress per JEDEC JESD24-11. Its SOA is defined up to 10 ms pulse width at TC = 25 °C, limited by RDS(on) and thermal constraints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDS | 300 V - Supports primary-side switching in 48 V telecom and 380 V intermediate bus DC-DC converters. |
| RDS(on) max | 75 mΩ - Ensures ≤1.3 W conduction loss at 42 A continuous drain current (TC = 25 °C). |
| Qg | 90 nC - Enables efficient gate driving with standard 1–2 A peak drivers at 100–500 kHz switching frequencies. |
| EAS | 290 mJ - Guarantees robustness against single-pulse inductive energy transients without external snubbers. |
| RthJC | 0.5 °C/W - Allows 300 W power dissipation with ≤150 °C junction rise above case at steady state. |
| trr | 215 ns - Minimizes reverse recovery losses in synchronous rectification and hard-switched topologies. |
| ID (TC = 100 °C) | 27 A - Defines usable continuous current in thermally constrained industrial enclosures. |
Pinout & Package
STW46NF30 is housed in TO-247 package with isolated tab (drain-connected). The package provides low thermal resistance (RthJC = 0.5 °C/W) and mechanical stability for high-current PCB mounting and heatsink attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Lead) | Gate (G) | High-impedance control input requiring <90 nC charge for full enhancement; sensitive to ESD. |
| 2 (Lead) | Source (S) | Power return path and reference node for gate drive; connects to PCB ground plane or source rail. |
| 3 (Lead) | Drain (D) | Main high-voltage power terminal; electrically tied to metal tab for direct heatsink coupling. |
| TAB | Drain (D) | Primary thermal and electrical connection point; must be electrically isolated from chassis unless system design permits common-drain configuration. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications per stress test requirements including HTOL, TC, HTRB, and UHAST. |
| 100% avalanche tested | Each unit undergoes single-pulse unclamped inductive switching at rated IAR = 26 A and EAS = 290 mJ to ensure ruggedness. |
| Low gate charge (90 nC) | Reduces driver power loss and enables use of cost-effective gate drivers in high-frequency (>300 kHz) SMPS designs. |
| Exceptional dv/dt immunity (10 V/ns) | Prevents false turn-on during high-speed switching in noisy environments such as motor drives and inverters. |
| 175 °C maximum junction temperature | Supports operation in sealed enclosures or high-ambient industrial settings without derating below full current rating. |
Applications
| Telecom DC-DC Converters | Industrial Motor Drives |
|---|---|
|
Use Scenario: Primary-side switch in 48 V input, 380 V output isolated flyback or forward converters powering base station RF modules. IC Role / Device Role / Timing Role: High-voltage power switch operating at 200–300 kHz with tight duty cycle control and zero-voltage switching support. Use Value: Low RDS(on) and Coss reduce conduction and switching losses, enabling >94% efficiency at full load. |
Use Scenario: Half-bridge high-side switch in 3-phase IGBT/MOSFET gate driver stages for HVAC compressors and pumps. IC Role / Device Role / Timing Role: Fast-turning, avalanche-rugged switch handling repetitive inductive kickback during PWM commutation. Use Value: 215 ns trr and 10 V/ns dv/dt rating suppress shoot-through risk and eliminate need for external anti-parallel diodes. |
| Server Power Supplies | Automotive On-Board Chargers |
|
Use Scenario: Synchronous rectifier or active clamp switch in LLC resonant converters for 1U server PSUs delivering 1–3 kW. IC Role / Device Role / Timing Role: High-current, low-loss switch managing 42 A continuous conduction mode with minimal thermal footprint. Use Value: 0.5 °C/W RthJC allows direct heatsink mounting, reducing thermal interface layers and improving long-term reliability. |
Use Scenario: DC-link switch in bidirectional OBC stages converting AC grid to 400 V battery and vice versa. IC Role / Device Role / Timing Role: AEC-Q101-compliant main switch handling 300 V DC bus with repeated avalanche stress during regenerative braking events. Use Value: 290 mJ EAS rating ensures no degradation after thousands of unclamped inductive cycles in real-world vehicle operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel 300 V Power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IXTH46N30P | RDS(on) = 70 mΩ (typ), Qg = 105 nC, RthJC = 0.45 °C/W, not AEC-Q101 qualified | Lacks automotive qualification; higher gate charge increases driver complexity in high-frequency designs | Preferred for non-automotive telecom/industrial where qualification is unnecessary and lower RthJC is critical |
| IPP60R099CP | 650 V rating, RDS(on) = 99 mΩ (typ), Qg = 72 nC, TO-220FP package, RthJC = 1.2 °C/W | Higher voltage rating but higher on-resistance and inferior thermal performance; unsuitable for 300 V primary switches | Only viable if system requires 650 V margin and can accept 30% higher conduction loss and reduced power density |
Compared with IXTH46N30P and IPP60R099CP, STW46NF30 uniquely balances AEC-Q101 compliance, 300 V optimization, low gate charge, and TO-247 thermal performance-making it the only choice for automotive OBCs and high-reliability telecom converters demanding both ruggedness and efficiency.
Availability
STW46NF30 is available at Aetrix Electronics and suitable for telecom DC-DC converters, industrial motor drives, and automotive on-board chargers requiring stable component supply and long-term production continuity.
Supply support for STW46NF30 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
STW46NF30 belongs to the STripFET II Power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching in isolated DC-DC converters and motor control systems operating up to 175 °C junction temperature.
FAQ
Is STW46NF30 pin-compatible with STP46NF30?
No. STW46NF30 uses TO-247 package with 3-lead + isolated tab configuration, while STP46NF30 uses TO-220 package with different lead spacing, thermal pad layout, and mechanical mounting. PCB footprints, heatsink interfaces, and creepage/clearance requirements are not interchangeable.
What is the maximum recommended gate resistor for 300 kHz operation?
Based on Qg = 90 nC and typical driver peak current of 2 A, a 10 Ω gate resistor achieves ~45 ns turn-on delay and ~90 ns total switching transition-within safe SOA limits for 300 kHz hard-switched operation with adequate dead time.
Does STW46NF30 require a negative gate turn-off voltage?
No. The device specifies ±20 V gate-source voltage rating and operates reliably with 0 V to +10 V gate drive. Negative turn-off is not required, though –5 V may improve noise immunity in high-dv/dt environments per application note AN4774.
Can STW46NF30 replace STB46NF30 in D²PAK-based designs?
No. STB46NF30 (D²PAK) and STW46NF30 (TO-247) differ in package thermal resistance (0.75 °C/W vs. 0.5 °C/W), PCB footprint, mounting method, and current-carrying capacity. Direct substitution would violate layout, thermal, and mechanical design rules.
STW46NF30 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STripFET™ II
- Package/Case:
- TO-247-3
- Packaging:
- Tube
- Product Status:
- Active
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 300 V
- Current - Continuous Drain (Id) @ 25°C:
- 42A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 75mOhm @ 17A, 10V
- Vgs(th) (Max) @ Id:
- 4V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 90 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 3200 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 300W (Tc)
- Operating Temperature:
- 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-247-3
STW46NF30 FAQ
1.How can I place an order for STW46NF30 through Aetrix?
Please submit a Request for Quotation (RFQ) for STW46NF30 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 STW46NF30 reliable?
The price and inventory of STW46NF30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STW46NF30 is usually 5 days.
3.What payment methods are accepted for STW46NF30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STW46NF30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STW46NF30?
STW46NF30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STW46NF30 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 STW46NF30?
For technical support, including STW46NF30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STW46NF30 requirements.
6.How does Aetrix verify that STW46NF30 is sourced from the original manufacturer or authorized distributors?
All STW46NF30 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 STW46NF30 meets industry standards.
7.What is the process for return or replacement of STW46NF30?
All STW46NF30 units undergo pre-shipment inspection (PSI). If there is an issue with STW46NF30, 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 STW46NF30 part is unused and in its original packaging.
Return procedure for STW46NF30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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