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

STMicroelectronics STF140N6F7

Name: STF140N6F7
Brand: STMicroelectronics
SKU: STF140N6F7
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STF140N6F7

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: STF140N6F7.pdf

Description:: MOSFET N-CH 60V 70A TO220FP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STF140N6F7 from STMicroelectronics is an N-channel 60 V, 70 A Power MOSFET in TO-220FP package, featuring 3.1 mΩ typical R_DS(on), 55 nC total gate charge, and 250 mJ single-pulse avalanche energy. It delivers high-efficiency switching in DC-DC converters, motor drives, and power supplies where low conduction loss and fast switching are critical.

For engineers reviewing the STF140N6F7 datasheet, STF140N6F7 pinout, STF140N6F7 application, or STF140N6F7 equivalent, key selection criteria include its 4.5 °C/W junction-to-case thermal resistance, 7.1 V/ns dV/dt ruggedness, Crss/Ciss ratio optimized for EMI immunity, and TO-220FP insulated package enabling direct heatsink mounting without isolation hardware.

Technical Context

This MOSFET employs STripFET™ F7 trench-gate technology to achieve ultra-low on-resistance while reducing gate charge (Q_g = 55 nC) and output capacitance (C_oss = 1520 pF). Its enhanced internal structure supports high-current operation up to 70 A continuous at 25 °C case temperature with robust unclamped inductive switching capability.

The device integrates a fast-recovery source-drain diode (t_rr = 42.4 ns, Q_rr = 38.2 nC) and exhibits stable threshold voltage (V_GS(th) = 2–4 V) across temperature. Its 2500 V RMS insulation rating enables safe use in isolated power stages without additional creepage/clearance barriers.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	60 V - Maximum drain-source blocking voltage for 48 V bus applications with margin
R_DS(on) typ.	3.1 mΩ - Enables <1 W conduction loss at 35 A, reducing heatsink requirements
I_D cont.	70 A @ T_case = 25 °C - Supports high-current DC-DC phases and motor H-bridge legs
Q_g	55 nC - Low gate drive power demand for 100 kHz+ PWM operation
E_AS	250 mJ - Withstands inductive turn-off transients in solenoid and relay drivers
R_thj-case	4.5 °C/W - Allows 33 W dissipation with ≤150 °C junction rise over 25 °C heatsink
C_rss/C_iss	193/3100 pF - Low ratio improves noise immunity during high-dV/dt commutation

Pinout & Package

TO-220FP package features insulated tab (2500 V RMS isolation), vertical lead frame, and single-row 3-pin configuration. The plastic body provides creepage distance ≥4 mm between leads and tab.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current path collector	Electrically connected to metal tab - must be mounted to heatsink with insulating pad or bushing
Source	Reference node for gate control & current return	Low-inductance connection point for sense resistor placement and gate driver ground reference
Gate	Control terminal for channel modulation	High-impedance input requiring <55 nC charge for full enhancement; sensitive to ESD

Key Features

Feature	Design Value
Ultra-low R_DS(on)	3.1 mΩ typ. reduces I²R losses by >30% vs. prior-generation 60 V MOSFETs in same package
Enhanced avalanche ruggedness	250 mJ single-pulse rating enables reliable operation in unclamped inductive switching without snubbers
Optimized Crss/Ciss ratio	0.062 ratio suppresses Miller-induced shoot-through in half-bridge configurations
Insulated TO-220FP package	2500 V RMS isolation eliminates need for separate insulating hardware in AC-coupled power stages
Fast body diode recovery	42.4 ns t_rr and 38.2 nC Q_rr minimize reverse recovery losses in synchronous rectification

Applications

DC-DC Converter Primary Switch

Motor Drive High-Side Switch

Use Scenario: 48 V input, 12 V output buck converter operating at 200 kHz in telecom power supply.

IC Role / Device Role / Timing Role: Main power switch handling 70 A peak current with minimal conduction and switching loss.

Use Value: 3.1 mΩ R_DS(on) and 55 nC Q_g enable >96% efficiency at full load while maintaining thermal margin.

Use Scenario: 24 V brushed DC motor controller with PWM frequency of 15 kHz and stall current up to 65 A.

IC Role / Device Role / Timing Role: High-side switching element controlling motor voltage with integrated body diode freewheeling.

Use Value: 42.4 ns t_rr and 250 mJ E_AS prevent diode failure and voltage overshoot during rapid direction reversal.

Industrial Solenoid Driver

UPS Inverter Output Stage

Use Scenario: 48 V solenoid actuator with 100 ms on-time pulses and 500 ms off-time in factory automation.

IC Role / Device Role / Timing Role: Unclamped inductive load switch managing energy recirculation via body diode.

Use Value: 250 mJ E_AS rating ensures reliable turn-off without external clamping diodes or RC snubbers.

Use Scenario: 60 V battery-backed UPS delivering 2 kVA sine-wave output using full-bridge topology.

IC Role / Device Role / Timing Role: Low-side switch in bridge leg with fast switching and low thermal impedance.

Use Value: 4.5 °C/W R_thj-case and insulated tab allow direct heatsink mounting, simplifying thermal design for continuous 33 W dissipation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 60 V power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF1404PBF	R_DS(on) = 4.0 mΩ max, Q_g = 131 nC, no insulated package	Requires external isolation hardware; higher switching loss at 200 kHz+	Lower cost but demands larger gate driver and heatsink area
IXTH120N60L2	R_DS(on) = 5.2 mΩ, TO-247 package, 600 V rating	Over-specified voltage rating increases cost and size; unsuitable for compact 48 V designs	Better for 400 V systems; not drop-in for STF140N6F7 footprint or thermal profile

Compared with IRF1404PBF and IXTH120N60L2, STF140N6F7 offers superior FoM (R_DS(on) × Q_g = 0.213 Ω·nC), TO-220FP insulation eliminating isolation components, and optimized 60 V rating for 48 V industrial power rails.

Availability

STF140N6F7 is available at Aetrix Electronics and suitable for DC-DC converters, motor drives, and industrial solenoid controllers requiring stable component supply and long-term production continuity.

Supply support for STF140N6F7 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, designing and manufacturing analog, MCU, power, and sensor solutions for automotive, industrial, and consumer markets.

The STripFET™ F7 product line targets high-efficiency power conversion, emphasizing ultra-low R_DS(on), fast switching, and ruggedness in standard packages for industrial and telecom power systems.

FAQ

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

The STF140N6F7 supports 50 A continuous drain current when the case temperature is maintained at 100 °C, as specified in Table 2 of the datasheet. This derating reflects thermal limits of the TO-220FP package and ensures safe operation within the SOA boundary at elevated temperatures.

Does the TO-220FP package require electrical isolation from the heatsink?

No - the TO-220FP package incorporates an electrically insulated metal tab rated for 2500 V RMS isolation. Direct mounting to a grounded heatsink is permitted without additional insulating hardware, simplifying mechanical assembly and improving thermal performance.

How does the body diode performance compare to discrete Schottky alternatives?

The integrated body diode has 1.2 V forward voltage at 70 A and 42.4 ns reverse recovery time - slower and higher-V_F than Schottky diodes, but sufficient for freewheeling in medium-frequency PWM applications where cost and layout simplicity outweigh ultra-fast recovery needs.

Can STF140N6F7 be used in parallel configurations?

Yes - its positive temperature coefficient of R_DS(on) (confirmed in Figure 10) enables stable current sharing when paralleled. Designers must match gate drive impedance and layout symmetry to ensure balanced dynamic current distribution and avoid oscillation.

STF140N6F7 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™

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

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 60 V

Current - Continuous Drain (Id) @ 25°C:: 70A (Tc)

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

Rds On (Max) @ Id, Vgs:: 3.5mOhm @ 35A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 55 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 3100 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 33W (Tc)

Operating Temperature:: 175°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220FP

STF140N6F7 FAQ

1.How can I place an order for STF140N6F7 through Aetrix?

Please submit a Request for Quotation (RFQ) for STF140N6F7 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 STF140N6F7 reliable?

The price and inventory of STF140N6F7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STF140N6F7 is usually 5 days.

3.What payment methods are accepted for STF140N6F7?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STF140N6F7 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STF140N6F7?

STF140N6F7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STF140N6F7 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 STF140N6F7?

For technical support, including STF140N6F7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STF140N6F7 requirements.

6.How does Aetrix verify that STF140N6F7 is sourced from the original manufacturer or authorized distributors?

All STF140N6F7 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 STF140N6F7 meets industry standards.

7.What is the process for return or replacement of STF140N6F7?

All STF140N6F7 units undergo pre-shipment inspection (PSI). If there is an issue with STF140N6F7, 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 STF140N6F7 part is unused and in its original packaging.

Return procedure for STF140N6F7:

1.Submit a request within 90 days.

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

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