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STMicroelectronics STP120NF04
- Part No.:
- STP120NF04
- Manufacturer:
- STMicroelectronics
- Category:
- FETs, MOSFETs
- Package:
- TO-220-3
- Datasheet:
-
STP120NF04.pdf
- Description:
- MOSFET N-CH 40V 120A TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,395
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Product details
Overview
STP120NF04 from STMicroelectronics is an N-channel enhancement-mode power MOSFET in TO-220 package, designed for high-current switching in DC-DC converters, motor drives, and power supplies. It delivers 40 V VDSS, 0.0047 Ω RDS(on) at VGS = 10 V, 120 A continuous drain current, and 300 W total power dissipation at TC = 25 °C.
For engineers reviewing the STP120NF04 datasheet, STP120NF04 pinout, STP120NF04 application, or STP120NF04 equivalent, key selection criteria include avalanche ruggedness (1.2 J EAS), gate charge (110 nC Qg), diode recovery performance (75 ns trr), thermal resistance (0.5 °C/W Rthj-case), and TO-220 mechanical compatibility.
Technical Context
This MOSFET employs ST's STripFET™ II process with single-feature-size strip geometry to achieve high cell density and low on-resistance. Its rugged unclamped inductive switching capability is validated by 100% avalanche testing, supporting reliable operation under transient overloads.
The device features standard gate threshold (2.8–4.5 V VGS(th)) for compatibility with 5 V and 3.3 V logic drivers, and includes an integrated body diode with fast reverse recovery (trr = 75 ns) and low forward voltage (VSD = 1.3 V at ISD = 120 A).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDSS | 40 V - maximum blocking voltage before avalanche onset; defines safe operating range in 24 V and 36 V systems |
| RDS(on) | 0.0047 Ω @ VGS = 10 V - enables <1.2 W conduction loss at 120 A, critical for high-efficiency power stages |
| ID (cont) | 120 A @ TC = 25 °C - supports high-current loads without external parallel devices in compact designs |
| EAS | 1.2 J - single-pulse avalanche energy rating ensures robustness during inductive turn-off transients |
| Qg | 110 nC - determines gate drive power requirement and switching speed in hard-switched topologies |
| trr | 75 ns - fast body diode recovery reduces switching losses and voltage overshoot in synchronous rectification |
| Rthj-case | 0.5 °C/W - enables effective heat transfer to heatsink; allows 300 W dissipation with ≤150 °C junction rise above case |
Pinout & Package
TO-220 package with isolated tab (drain-connected), standard 3-pin through-hole mounting, and lead-free ECOPACK® compliance per JEDEC JESD97. Mechanical dimensions conform to ST's TO-220 mechanical data sheet (Rev 2, Oct 2006).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Source) | Source terminal | Low-side reference node; connects to ground or return path in buck/switching regulators |
| 2 (Gate) | Control input | High-impedance MOS gate requiring ~110 nC charge for full enhancement; sensitive to ESD |
| 3 (Drain) | Power output / high-side connection | Internally bonded to metal tab; electrically connected to heatsink; must be insulated if heatsink is grounded |
Key Features
| Feature | Design Value |
|---|---|
| 100% avalanche tested | Guarantees minimum 1.2 J single-pulse energy handling without parameter shift or failure |
| Standard threshold drive | VGS(th) range (2.8–4.5 V) ensures reliable turn-on with 5 V microcontroller GPIO or dedicated gate drivers |
| STripFET™ II process | Delivers 0.0047 Ω RDS(on) in TO-220 - 20% lower than prior-generation equivalents at same die size |
| Fast body diode | 75 ns trr and 185 nC Qrr reduce commutation losses in freewheeling and synchronous rectifier applications |
Applications
| Motor Drive Half-Bridge | DC-DC Synchronous Buck |
|---|---|
Use Scenario: High-current BLDC motor phase leg in industrial actuators or power tools. IC Role / Device Role / Timing Role: Low-side switch in half-bridge configuration; handles 120 A peak load current with minimal conduction loss. Use Value: 0.0047 Ω RDS(on) limits I²R loss to <68 W at 120 A, enabling air-cooled designs below 1 kW. | Use Scenario: Output stage of 48 V-to-12 V automotive or telecom DC-DC converter. IC Role / Device Role / Timing Role: Synchronous rectifier replacing Schottky diode; conducts during low-side conduction interval. Use Value: Body diode trr = 75 ns prevents shoot-through and reduces voltage spikes during dead-time transitions. |
| UPS Inverter Stage | Industrial Power Supply Switch |
Use Scenario: Uninterruptible power supply output inverter driving resistive-inductive loads. IC Role / Device Role / Timing Role: High-current switching element in full-bridge topology; subjected to repetitive unclamped inductive stress. Use Value: 1.2 J EAS rating supports >10⁵ avalanche events without degradation, extending system lifetime under fault conditions. | Use Scenario: Primary-side switch in high-power AC-DC front-end with active PFC and LLC stages. IC Role / Device Role / Timing Role: Main power switch handling 120 A pulsed current (IDM = 480 A) during startup or overload. Use Value: 0.5 °C/W Rthj-case enables stable thermal management with standard TO-220 heatsinks, avoiding derating below 100 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar N-channel power MOSFET applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| IRF1404 | RDS(on) = 0.004 Ω (lower), VDSS = 40 V, Qg = 131 nC (higher), obsolete since 2020 | Higher gate drive demand; identical avalanche rating not specified in datasheet | Prefer STP120NF04 where gate drive power budget is constrained or long-term supply continuity required |
| STP110N4LH6 | RDS(on) = 0.0037 Ω, VDSS = 40 V, Qg = 105 nC, newer STripFET™ VI generation | Improved efficiency but requires updated layout due to different pinout (source-drain swapped in TO-220AB) | Select STP110N4LH6 only when redesigning for higher efficiency and can accommodate revised PCB footprint |
Compared with IRF1404 and STP110N4LH6, STP120NF04 offers balanced trade-offs: lower Qg than IRF1404 for faster switching with less driver loss, and proven field reliability across 15+ years of industrial use-unlike the newer STP110N4LH6, which lacks equivalent long-term application validation.
Availability
STP120NF04 is available at Aetrix Electronics and suitable for motor drives, UPS inverters, DC-DC converters, and industrial power supplies requiring stable component supply and legacy design continuity.
Supply support for STP120NF04 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, specializing in power management, microcontrollers, sensors, and automotive ICs.
The STripFET™ series was developed to deliver ultra-low RDS(on) in standard packages for high-efficiency power conversion in industrial, computing, and consumer applications.
FAQ
Is STP120NF04 suitable for surface-mount assembly?
No. STP120NF04 uses a through-hole TO-220 package with leads designed for axial insertion and soldering. It lacks SMD-compatible terminals or thermal pad layout. Surface-mount alternatives require different part numbers such as STP120N4F6 in PowerFLAT™ 8x8.
What is the maximum safe operating temperature for continuous operation?
The maximum junction temperature is 175 °C. With Rthj-case = 0.5 °C/W and a heatsink maintaining case temperature ≤85 °C, the device supports continuous 120 A operation provided ambient and thermal interface conditions stay within specification limits.
Does STP120NF04 have built-in ESD protection?
It does not integrate dedicated on-die ESD protection circuitry. Gate oxide is rated for ±20 V VGS, but real-world handling requires external gate resistors and TVS clamping. ST recommends limiting gate-source voltage transients to <±15 V during board assembly and operation.
Can STP120NF04 replace IRF3205 in existing designs?
Yes, with verification. Both are 55 V-rated N-channel TO-220 MOSFETs, but STP120NF04 has lower VDSS (40 V vs. 55 V) and lower RDS(on) (0.0047 Ω vs. 0.008 Ω). Replacement is viable in 24–36 V systems where voltage margin permits; gate drive and thermal layout remain compatible.
STP120NF04 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- STripFET™ II
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- FET Type:
- N-Channel
- Technology:
- MOSFET (Metal Oxide)
- Drain to Source Voltage (Vdss):
- 40 V
- Current - Continuous Drain (Id) @ 25°C:
- 120A (Tc)
- Drive Voltage (Max Rds On, Min Rds On):
- 10V
- Rds On (Max) @ Id, Vgs:
- 5mOhm @ 50A, 10V
- Vgs(th) (Max) @ Id:
- 4.5V @ 250µA
- Gate Charge (Qg) (Max) @ Vgs:
- 150 nC @ 10 V
- Vgs (Max):
- ±20V
- Input Capacitance (Ciss) (Max) @ Vds:
- 5100 pF @ 25 V
- FET Feature:
- -
- Power Dissipation (Max):
- 300W (Tc)
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
STP120NF04 FAQ
1.How can I place an order for STP120NF04 through Aetrix?
Please submit a Request for Quotation (RFQ) for STP120NF04 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 STP120NF04 reliable?
The price and inventory of STP120NF04 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP120NF04 is usually 5 days.
3.What payment methods are accepted for STP120NF04?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP120NF04 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STP120NF04?
STP120NF04 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STP120NF04 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 STP120NF04?
For technical support, including STP120NF04 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP120NF04 requirements.
6.How does Aetrix verify that STP120NF04 is sourced from the original manufacturer or authorized distributors?
All STP120NF04 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 STP120NF04 meets industry standards.
7.What is the process for return or replacement of STP120NF04?
All STP120NF04 units undergo pre-shipment inspection (PSI). If there is an issue with STP120NF04, 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 STP120NF04 part is unused and in its original packaging.
Return procedure for STP120NF04:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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