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Home > Products > Discrete Semiconductor Products > Transistors > FETs, MOSFETs > FETs, MOSFETs

STMicroelectronics STF20NF06

Name: STF20NF06
Brand: STMicroelectronics
SKU: STF20NF06
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STF20NF06

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: STF20NF06.pdf

Description:: MOSFET N-CH 60V 20A TO220FP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STF20NF06 from STMicroelectronics is an N-channel enhancement-mode Power MOSFET in TO-220FP package, rated for 60V V_DSS, 20A continuous drain current at T_C = 25°C, and 0.06Ω typical R_DS(on) at V_GS = 10V. It features avalanche ruggedness, 175°C maximum junction temperature, and high dv/dt capability-designed for DC-DC converters, motor control, and industrial switching power supplies.

For engineers reviewing the STF20NF06 datasheet, STF20NF06 pinout, STF20NF06 application, or STF20NF06 equivalent, key selection criteria include its TO-220FP thermal resistance (R_thj-case = 5.35°C/W), unclamped inductive switching robustness (E_AS = 120 mJ), and source-drain diode recovery performance (t_rr = 50 ns, Q_rr = 88 nC) under 150°C junction conditions.

Technical Context

This device uses ST's STripFET™ II process with single-feature-size strip geometry to achieve high cell density and low on-resistance while maintaining manufacturing reproducibility. Its gate charge profile (Q_g = 14 nC, Q_gd = 5.5 nC) supports fast switching with moderate gate drive requirements.

The internal body diode is characterized for inductive load commutation: V_SD = 1.5 V at I_SD = 20 A and T_j = 150°C, with reverse recovery time t_rr = 50 ns and peak recovery current I_RRM = 3.2 A under specified test conditions (di/dt = 100 A/µs, V_DD = 20 V).

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	60 V - Maximum blocking voltage before avalanche onset; defines usable bus voltage range in buck converters or half-bridge topologies.
R_DS(on)	0.06 Ω (typ) at V_GS = 10 V - Directly determines conduction loss: ~2.4 W at 20 A, critical for thermal design in compact enclosures.
I_D (cont)	20 A at T_C = 25°C - Continuous current rating limited by package thermal resistance (5.35°C/W); derates to 14 A at T_C = 100°C.
E_AS	120 mJ - Single-pulse avalanche energy rating confirms ruggedness during unclamped inductive turn-off events without external snubbers.
t_rr	50 ns - Reverse recovery time of integrated body diode; impacts switching loss and EMI in synchronous rectification or freewheeling applications.
Q_g	14 nC - Total gate charge required to fully switch; determines gate driver current demand and switching speed trade-offs.
T_j max	175°C - Maximum junction temperature enables operation in high-ambient environments such as industrial motor drives or sealed power supplies.

Pinout & Package

STF20NF06 is housed in a TO-220FP (Full-Pak) package with insulated tab, enabling direct mounting to heatsinks without electrical isolation hardware. The plastic body provides creepage/clearance compliance per IEC 60950-1, and the lead-free finish meets RoHS requirements.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control electrode	Receives 10 V gate drive to achieve full enhancement; threshold voltage V_GS(th) = 2–4 V ensures reliable turn-on with standard logic-level drivers.
2 (Drain)	High-side current path	Connected to input bus or high-voltage rail; electrically tied to metal tab in TO-220FP, requiring insulating washer if heatsink is grounded.
3 (Source)	Return path & reference node	Serves as common return for load current and gate drive reference; must be routed with low inductance to minimize switching oscillation.

Key Features

Feature	Design Value
Avalanche ruggedness	100% tested to 120 mJ single-pulse energy-enables reliable operation in inductive switching without external clamping circuits.
High dv/dt immunity	9 V/ns rated slope-reduces risk of false turn-on during fast voltage transients in high-frequency SMPS or motor phase-legs.
Thermal stability	175°C max junction temperature-supports sustained operation in enclosed industrial environments where ambient exceeds 85°C.
Low gate charge	14 nC total gate charge-allows efficient driving with low-power gate drivers (e.g., TC4420) while maintaining <25 ns switching times.

Applications

Motor Drive Half-Bridge

DC-DC Synchronous Rectifier

Use Scenario: High-side switch in 24–48 V brushed DC motor H-bridge with PWM frequency up to 100 kHz.

IC Role / Device Role / Timing Role: Power MOSFET switching element controlling current direction and magnitude; operates in hard-switched mode with body diode freewheeling.

Use Value: Low R_DS(on) minimizes I²R losses during conduction; avalanche rating absorbs inductive kickback during PWM dead-time transitions.

Use Scenario: Secondary-side synchronous rectifier in isolated 12 V output flyback converter delivering up to 15 A.

IC Role / Device Role / Timing Role: Low-side active rectifier replacing Schottky diode; driven complementary to primary-side switch with precise timing control.

Use Value: 1.5 V forward drop of integrated body diode reduces conduction loss vs. 0.5 V Schottky at same current; fast t_rr limits reverse recovery loss.

Industrial AC-DC PFC Stage

UPS Inverter Output Stage

Use Scenario: Boost switch in active PFC circuit operating at 65 kHz with 400 V DC bus.

IC Role / Device Role / Timing Role: Main switching transistor in continuous conduction mode (CCM) boost topology; subjected to high dv/dt and repetitive avalanche stress.

Use Value: 9 V/ns dv/dt rating prevents spurious turn-on; 120 mJ E_AS withstands line surge-induced overvoltage without failure.

Use Scenario: Output leg switch in 1 kVA online UPS inverter delivering 230 VAC sine-wave output.

IC Role / Device Role / Timing Role: High-current switching device in full-bridge configuration; handles bidirectional current flow and regenerative braking energy.

Use Value: 80 A pulsed drain current (I_DM) supports short-term overload; TO-220FP insulation allows safe mounting to shared heatsink with galvanic isolation.

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
IRFZ44NPBF	R_DS(on) = 0.028 Ω (lower), but V_DSS = 55 V and E_AS = 60 mJ (half)	Not suitable for 60 V bus systems or high-energy inductive loads	Select only when lower conduction loss is prioritized over voltage margin and avalanche robustness.
STP20NF06	Same die, TO-220 package (R_thj-case = 2.5°C/W), higher P_tot = 60 W	Better thermal performance but requires insulating hardware for heatsink mounting	Prefer when board space permits larger footprint and thermal budget demands lower junction rise.

Compared with IRFZ44NPBF and STP20NF06, STF20NF06 uniquely balances 60 V rating, 120 mJ avalanche energy, and TO-220FP insulation-making it optimal for space-constrained industrial inverters where safety isolation and ruggedness are non-negotiable.

Availability

STF20NF06 is available at Aetrix Electronics and suitable for industrial motor drives, UPS inverters, and AC-DC PFC stages requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for STF20NF06 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.

STF20NF06 belongs to the STripFET™ II Power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching in industrial power conversion and motor control systems where thermal resilience and transient robustness are critical.

FAQ

What is the maximum allowable continuous drain current at 100°C case temperature?

The STF20NF06 supports 14 A continuous drain current at T_C = 100°C, as specified in Table 1 of the datasheet. This derating reflects its TO-220FP thermal resistance of 5.35°C/W and maximum junction temperature of 175°C. Exceeding this current risks thermal runaway unless additional heatsinking or forced airflow is applied.

Does STF20NF06 require a gate resistor for stable switching?

Yes-a gate resistor (typically 4.7 Ω to 22 Ω) is recommended to dampen ringing caused by gate loop inductance and prevent parasitic oscillation. The datasheet specifies switching times using R_G = 4.7 Ω; omitting it may cause overshoot, shoot-through, or excessive EMI in high-speed applications like PFC or motor control.

Can STF20NF06 replace STP20NF06 in existing designs?

Electrically identical but thermally distinct: STF20NF06 has higher R_thj-case (5.35°C/W vs. 2.5°C/W), reducing its power dissipation capability from 60 W to 28 W at T_C = 25°C. Replacement is feasible only if thermal design accommodates the 2.1× higher junction-to-case resistance and reduced SOA at elevated temperatures.

Is the TO-220FP package electrically insulated?

Yes-the TO-220FP variant features an insulated metal tab rated for 2500 V RMS isolation between all three leads and the external heatsink (per IEC 60950-1). This eliminates the need for mica washers or silicone pads, simplifying mechanical assembly and improving thermal reliability in grounded-chassis systems.

STF20NF06 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ II

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 60 V

Current - Continuous Drain (Id) @ 25°C:: 20A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 10V

Rds On (Max) @ Id, Vgs:: 70mOhm @ 10A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 18 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 400 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 28W (Tc)

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220FP

STF20NF06 FAQ

1.How can I place an order for STF20NF06 through Aetrix?

Please submit a Request for Quotation (RFQ) for STF20NF06 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 STF20NF06 reliable?

The price and inventory of STF20NF06 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STF20NF06 is usually 5 days.

3.What payment methods are accepted for STF20NF06?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STF20NF06 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STF20NF06?

STF20NF06 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STF20NF06 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 STF20NF06?

For technical support, including STF20NF06 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STF20NF06 requirements.

6.How does Aetrix verify that STF20NF06 is sourced from the original manufacturer or authorized distributors?

All STF20NF06 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 STF20NF06 meets industry standards.

7.What is the process for return or replacement of STF20NF06?

All STF20NF06 units undergo pre-shipment inspection (PSI). If there is an issue with STF20NF06, 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 STF20NF06 part is unused and in its original packaging.

Return procedure for STF20NF06:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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