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

STMicroelectronics STP14NF12

Name: STP14NF12
Brand: STMicroelectronics
SKU: STP14NF12
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STP14NF12

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-220-3

Datasheet:: STP14NF12.pdf

Description:: MOSFET N-CH 120V 14A TO220-3

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STP14NF12 from STMicroelectronics is an N-channel enhancement-mode Power MOSFET in TO-220 package, rated for 120V V_DSS, 14A continuous drain current at T_C = 25°C, and 0.16Ω R_DS(on) at V_GS = 10V. It features low gate charge (15.5 nC), high dv/dt immunity (9 V/ns), and is optimized as a primary-side switch in isolated DC-DC converters for telecom and computing power supplies.

For engineers reviewing the STP14NF12 datasheet, STP14NF12 pinout, STP14NF12 application, or STP14NF12 equivalent, key selection criteria include its 120V breakdown voltage, 0.16Ω on-resistance at 10V gate drive, 15.5 nC total gate charge, thermal resistance of 2.5°C/W (j-case), and TO-220 mechanical compatibility with standard heatsink mounting.

Technical Context

This STripFET™ II device uses a planar vertical DMOS structure to minimize input capacitance and gate charge while maintaining robust avalanche capability (60 mJ single-pulse EAS). Its gate threshold voltage (2–4 V) enables direct drive from 3.3V/5V logic controllers without level-shifting.

The MOSFET supports fast switching in hard-switched topologies due to low C_iss (460 pF), C_oss (70 pF), and C_rss (30 pF) at V_DS = 25V, and exhibits stable R_DS(on) over temperature (typical +0.5%/°C from 25°C to 125°C).

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	120 V - Withstands up to 120V drain-source blocking voltage before avalanche conduction begins.
R_DS(on)	0.16 Ω (max 0.18 Ω) at V_GS = 10V, I_D = 7A - Enables <1.6W conduction loss at 10A, reducing heatsink requirements.
Q_g	15.5 nC - Low gate drive energy reduces driver IC stress and switching losses in high-frequency converters.
I_D (cont)	14 A at T_C = 25°C - Supports medium-power SMPS primary-side switching up to ~150W with adequate heatsinking.
dv/dt	9 V/ns - Resists false turn-on during high-slew-rate transients in bridge or flyback configurations.
E_AS	60 mJ - Withstands unclamped inductive switching events without failure under specified test conditions.
R_thj-case	2.5 °C/W - Allows junction-to-case thermal drop of 25°C at 10W dissipation, simplifying thermal design.

Pinout & Package

STP14NF12 is housed in a through-hole TO-220 package with three leads: Gate (pin 1), Drain (pin 2), Source (pin 3). The metal tab (Drain-connected) provides mechanical mounting and thermal path to heatsink.

Pin/Terminal	Circuit Role	Design Meaning
1 (Left)	Gate	Control terminal; requires ≤±20V gate-source voltage; low 15.5 nC charge enables efficient drive from PWM controllers.
2 (Center)	Drain	High-voltage power terminal; electrically connected to metal tab; must be isolated from heatsink unless referenced to same potential.
3 (Right)	Source	Power return/reference node; forms common connection with gate driver ground in low-side configurations.

Key Features

Feature	Design Value
STripFET™ II process	Reduces gate charge and input capacitance vs. conventional planar MOSFETs, improving efficiency in 100–500 kHz SMPS.
Low R_DS(on) × Q_g figure-of-merit	2.8 Ω·nC - Balances conduction and switching losses for optimal performance in telecom DC-DC bricks.
High dv/dt immunity	9 V/ns - Prevents spurious turn-on during fast voltage transitions in half-bridge or resonant LLC circuits.
Robust body diode	trr = 92 ns, Q_rr = 230 nC - Supports synchronous rectification replacement and tolerates moderate reverse recovery stress.
ECOPACK® compliance	Lead-free second-level interconnect per JEDEC JESD97 - Meets RoHS requirements without compromising solderability or reliability.

Applications

Telecom DC-DC Converters

ATX Power Supply Primary Switch

Use Scenario: Primary-side switch in 48V-input isolated forward or flyback converters delivering 12V/10A to server backplanes.

IC Role / Device Role / Timing Role: High-voltage power switch controlled by UC384x or similar PWM controller at 200–300 kHz.

Use Value: 0.16Ω R_DS(on) limits conduction loss to <1.6W at full load, while 15.5 nC Q_g enables clean gate drive with minimal driver overhead.

Use Scenario: Main switching transistor in +12V rail generation stage of desktop PC ATX power supplies.

IC Role / Device Role / Timing Role: Hard-switched primary FET operating at 50–100 kHz with active clamp or RCD snubber.

Use Value: 120V rating accommodates reflected output voltage plus leakage spikes; 60 mJ EAS withstands unclamped inductive turn-off events.

Industrial Motor Drive Half-Bridge

LED Driver High-Side Switch

Use Scenario: Low-side switch in 24–48V brushed DC motor H-bridge for factory automation actuators.

IC Role / Device Role / Timing Role: PWM-controlled power stage element with freewheeling path provided by internal body diode.

Use Value: 14A continuous rating supports 10A RMS motor currents; 92 ns trr ensures predictable commutation timing and low diode loss.

Use Scenario: High-side constant-current switch in 36–72V string LED drivers for street lighting.

IC Role / Device Role / Timing Role: Linear or PWM-regulated pass element controlling LED current via source-follower configuration.

Use Value: 120V V_DSS safely handles open-circuit LED string transients; 2.5°C/W R_thj-case enables stable thermal regulation at 2–3W dissipation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 120V power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
IRF640NPbF	R_DS(on) = 0.18Ω (higher), Q_g = 39 nC (2.5× higher), V_DSS = 200V	Better voltage margin but significantly higher switching loss; less suitable for >200 kHz operation	Prefer when overvoltage robustness > efficiency; avoid in high-frequency telecom converters
STP16NF12	R_DS(on) = 0.14Ω (lower), Q_g = 17 nC (slightly higher), same package and pinout	Direct upgrade path with improved conduction loss and identical layout compatibility	Select for marginal thermal margin improvement without redesign; verified drop-in replacement per ST application note AN410

Compared with IRF640NPbF, STP14NF12 delivers lower gate drive demand and better high-frequency efficiency; versus STP16NF12, it trades 0.02Ω higher R_DS(on) for slightly reduced gate charge and cost-making it optimal for cost-sensitive 100–150W designs where thermal headroom exists.

Availability

STP14NF12 is available at Aetrix Electronics and suitable for telecom DC-DC converters, ATX power supply primary stages, and industrial motor drive half-bridges requiring stable component supply and long-term industrial lifecycle support.

Supply support for STP14NF12 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STripFET™ Power MOSFET product line targets high-efficiency switching power conversion, emphasizing low gate charge, rugged avalanche performance, and thermal reliability in TO-220 and surface-mount packages.

FAQ

What is the maximum safe operating temperature for STP14NF12?

The absolute maximum junction temperature is 175°C, with storage temperature ranging from –55°C to +175°C. For reliable long-term operation, ST recommends limiting steady-state T_j to ≤150°C using derating curves from the datasheet. At T_C = 100°C, the continuous drain current drops to 9A due to thermal limitations.

Can STP14NF12 be used in synchronous rectification?

No-it is not optimized for synchronous rectifier use. Its body diode has 92 ns reverse recovery time and 230 nC Q_rr, which causes significant switching loss and noise in high-frequency SR applications. Dedicated low-Q_rr MOSFETs like STP16NF06L are recommended instead.

Is STP14NF12 compatible with lead-free reflow soldering?

Yes-STP14NF12 is ECOPACK®-compliant with lead-free second-level interconnect. It meets JEDEC J-STD-020 moisture sensitivity level 1 and supports peak reflow temperatures up to 260°C for 10 seconds, per the manufacturer's packaging label specifications.

Does STP14NF12 require a gate resistor for stability?

A gate resistor (typically 4.7–10Ω) is recommended to dampen ringing caused by PCB trace inductance interacting with gate capacitance. The datasheet specifies switching times using R_G = 4.7Ω; omitting it may cause overshoot, shoot-through, or EMI issues in hard-switched topologies.

STP14NF12 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):: 120 V

Current - Continuous Drain (Id) @ 25°C:: 14A (Tc)

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

Rds On (Max) @ Id, Vgs:: 180mOhm @ 7A, 10V

Vgs(th) (Max) @ Id:: 4V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 21 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 460 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 60W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STP14NF12 FAQ

1.How can I place an order for STP14NF12 through Aetrix?

Please submit a Request for Quotation (RFQ) for STP14NF12 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 STP14NF12 reliable?

The price and inventory of STP14NF12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STP14NF12 is usually 5 days.

3.What payment methods are accepted for STP14NF12?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STP14NF12 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STP14NF12?

STP14NF12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STP14NF12 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 STP14NF12?

For technical support, including STP14NF12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STP14NF12 requirements.

6.How does Aetrix verify that STP14NF12 is sourced from the original manufacturer or authorized distributors?

All STP14NF12 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 STP14NF12 meets industry standards.

7.What is the process for return or replacement of STP14NF12?

All STP14NF12 units undergo pre-shipment inspection (PSI). If there is an issue with STP14NF12, 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 STP14NF12 part is unused and in its original packaging.

Return procedure for STP14NF12:

1.Submit a request within 90 days.

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

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