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

STMicroelectronics STU27N3LH5

Name: STU27N3LH5
Brand: STMicroelectronics
SKU: STU27N3LH5
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STU27N3LH5

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-251-3 Short Leads, IPAK, TO-251AA

Datasheet:: STU27N3LH5.pdf

Description:: MOSFET N-CH 30V 27A IPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STU27N3LH5 from STMicroelectronics is an N-channel 30 V, 27 A Power MOSFET in IPAK (TO-251) package, featuring 0.020 Ω R_DS(on) at V_GS = 10 V and 13.5 A, 4.6 nC total gate charge, and 50 mJ single-pulse avalanche energy. It delivers high-efficiency switching in DC-DC converters and motor control stages where low conduction loss and fast turn-on/off are critical.

For engineers reviewing the STU27N3LH5 datasheet, STU27N3LH5 pinout, STU27N3LH5 application, or STU27N3LH5 equivalent, this device is evaluated for high-current, medium-voltage switching roles requiring validated thermal ruggedness (R_thJC = 5 °C/W), low gate drive power, and robust unclamped inductive switching capability.

Technical Context

This STripFET™ V MOSFET employs trench-gate technology optimized for R_DS(on) × Q_g figure-of-merit minimization. Its gate threshold voltage (1–2.5 V) enables compatibility with 3.3 V and 5 V logic-level drivers, while its 108 A pulsed drain current supports short-duration overload conditions without SOA violation.

The device integrates a fast-recovery body diode (t_rr = 16.2 ns, Q_rr = 7.8 nC) with low forward voltage (V_SD = 1.1 V at I_SD = 13.5 A), enabling efficient synchronous rectification and freewheeling in buck and half-bridge topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	30 V - Maximum blocking voltage compatible with 24 V nominal bus systems and automotive 12 V/24 V applications.
R_DS(on) max	0.020 Ω @ V_GS = 10 V, I_D = 13.5 A - Enables ≤0.37 W conduction loss at 13.5 A, reducing heatsink requirements.
Q_g	4.6 nC - Low gate charge reduces driver power dissipation and allows use of smaller gate drivers in high-frequency designs.
E_AS	50 mJ - Confirmed single-pulse avalanche energy supports reliable operation under inductive switching stress without external snubbers.
t_r/t_f	22 ns / 2.8 ns - Fast switching transitions minimize overlap losses in PWM-based power stages operating up to 500 kHz.
R_thJC	5 °C/W - Junction-to-case thermal resistance enables direct mounting to heatsinks for continuous 19 A operation at T_C = 100 °C.
I_D (cont)	27 A @ T_C = 25 °C - Rated for high-current load switching in industrial motor drives and power supplies.

Pinout & Package

STU27N3LH5 uses the IPAK (TO-251) surface-mount package with three terminals: Drain (Tab/terminal 2), Gate (terminal 1), and Source (terminal 3). The exposed drain tab provides low-inductance, high-current path and serves as primary thermal interface.

Pin/Terminal	Circuit Role	Design Meaning
1	Gate	Control input; requires <2.5 V threshold activation and ≤±22 V absolute rating; low C_iss (475 pF) eases driving.
2	Drain (Tab)	Main high-side current path; electrically connected to metal tab for thermal and electrical conduction; must be isolated from heatsink unless referenced to same potential.
3	Source	Reference node for gate drive and current sensing; tied to power ground in low-side switch configurations; carries full load current.

Key Features

Feature	Design Value
Ultra-low R_DS(on) × Q_g FOM	Industry benchmark for efficiency in 30 V switching applications-enables higher power density and reduced thermal design margin.
High avalanche ruggedness	50 mJ single-pulse E_AS verified per JEDEC JESD24-11-eliminates need for external clamping in many inductive load circuits.
Fast body diode recovery	t_rr = 16.2 ns, Q_rr = 7.8 nC-reduces reverse recovery losses and EMI in synchronous rectifier and freewheeling paths.
Logic-level gate drive	V_GS(th) = 1–2.5 V-ensures full enhancement with standard 3.3 V or 5 V microcontroller GPIOs without level-shifting circuitry.
ECOPACK® compliant	Halogen-free, RoHS-compliant IPAK package-meets environmental requirements for industrial and consumer end equipment.

Applications

DC-DC Converter Primary Switch

Brushed DC Motor Driver High-Side

Use Scenario: 24 V input, 5–12 V output synchronous buck converter delivering up to 20 A.

IC Role / Device Role / Timing Role: High-side main switching element controlling power delivery during PWM on-time.

Use Value: 0.020 Ω R_DS(on) limits conduction loss to <0.8 W at 20 A, while 4.6 nC Q_g supports 300–500 kHz operation with minimal gate drive loss.

Use Scenario: 24 V brushed motor drive with PWM speed control and regenerative braking.

IC Role / Device Role / Timing Role: High-side switch enabling bidirectional current flow through motor winding during active freewheeling.

Use Value: Integrated body diode with 1.1 V V_SD and 16.2 ns t_rr ensures low-loss current recirculation, reducing heat generation during PWM off-time.

Industrial PLC Output Module

LED Driver Current Switch

Use Scenario: Solid-state relay replacement in programmable logic controller output stage switching 12–24 V DC loads up to 15 A.

IC Role / Device Role / Timing Role: Load-switching transistor controlled by isolated digital output signal.

Use Value: 108 A pulsed drain current and 50 mJ E_AS withstand inrush currents and inductive kickback from solenoids and contactors without failure.

Use Scenario: Constant-current LED string driver with dimming via PWM at 1–10 kHz.

IC Role / Device Role / Timing Role: Low-side current sink switch modulating LED current path.

Use Value: 0.020 Ω R_DS(on) ensures <0.5 W loss at 5 A, enabling compact PCB layout without forced air cooling in enclosed luminaires.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel 30 V power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STD27N3LH5	DPAK (TO-252) package; R_DS(on) = 0.019 Ω; R_thJC = 5 °C/W; tape-and-reel packaging.	Better suited for automated SMT assembly; slightly lower R_DS(on) but identical thermal performance and SOA.	Select when board space permits DPAK footprint and volume production favors reel-fed placement.
STP27N3LH5	TO-220 package; R_DS(on) = 0.020 Ω; R_thJC = 3.33 °C/W; higher thermal conductivity but through-hole mounting.	Preferred for prototyping, heatsink-integrated designs, or legacy through-hole layouts requiring mechanical robustness.	Choose when manual assembly, field serviceability, or direct bolt-down heatsinking is required.

Compared with STD27N3LH5 and STP27N3LH5, STU27N3LH5 offers identical electrical specs and SOA but occupies less PCB area than TO-220 and provides better thermal interface than DPAK due to its exposed drain tab geometry-making it optimal for space-constrained, thermally demanding SMT applications.

Availability

STU27N3LH5 is available at Aetrix Electronics and suitable for industrial motor drives, DC-DC power supplies, and programmable logic controller output modules requiring stable component supply across multi-year production cycles.

Supply support for STU27N3LH5 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 analog, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

This device belongs to the STripFET™ V Power MOSFET product line, engineered specifically for high-efficiency, high-current switching in 24–48 V systems where low R_DS(on) × Q_g and avalanche reliability are essential.

FAQ

Is STU27N3LH5 suitable for 3.3 V logic-level gate drive?

Yes. With a gate threshold voltage range of 1–2.5 V and guaranteed enhancement at V_GS = 4.5 V (R_DS(on) = 0.027 Ω), STU27N3LH5 fully turns on using standard 3.3 V microcontroller outputs. No level shifter is required for most digital control interfaces.

What is the maximum continuous current at 85 °C case temperature?

At T_C = 85 °C, the derated continuous drain current is approximately 22.5 A, calculated from the 27 A rating at 25 °C and the 0.2 W/°C derating factor applied to its 30 W P_TOT limit. This assumes adequate heatsinking maintaining T_C ≤ 85 °C.

Does STU27N3LH5 require a gate resistor for stability?

A gate resistor (typically 4.7 Ω) is recommended to dampen ringing caused by gate loop inductance and MOSFET input capacitance. Data sheet Figure 15 confirms stable switching waveforms with RG = 4.7 Ω under 13.5 A resistive load conditions.

Can STU27N3LH5 replace STP27N3LH5 in an existing TO-220 footprint?

No. STU27N3LH5 uses IPAK (TO-251), which has different pad layout, lead pitch, and thermal pad configuration than TO-220. Direct footprint substitution is not possible without PCB redesign; however, electrical performance and SOA are closely matched.

STU27N3LH5 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ V

Package/Case:: TO-251-3 Short Leads, IPAK, TO-251AA

Packaging:: Tube

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 27A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 4.5V, 10V

Rds On (Max) @ Id, Vgs:: 20mOhm @ 13.5A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 4.6 nC @ 5 V

Vgs (Max):: ±22V

Input Capacitance (Ciss) (Max) @ Vds:: 475 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 30W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-251 (IPAK)

STU27N3LH5 FAQ

1.How can I place an order for STU27N3LH5 through Aetrix?

Please submit a Request for Quotation (RFQ) for STU27N3LH5 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 STU27N3LH5 reliable?

The price and inventory of STU27N3LH5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STU27N3LH5 is usually 5 days.

3.What payment methods are accepted for STU27N3LH5?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STU27N3LH5 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STU27N3LH5?

STU27N3LH5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STU27N3LH5 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 STU27N3LH5?

For technical support, including STU27N3LH5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STU27N3LH5 requirements.

6.How does Aetrix verify that STU27N3LH5 is sourced from the original manufacturer or authorized distributors?

All STU27N3LH5 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 STU27N3LH5 meets industry standards.

7.What is the process for return or replacement of STU27N3LH5?

All STU27N3LH5 units undergo pre-shipment inspection (PSI). If there is an issue with STU27N3LH5, 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 STU27N3LH5 part is unused and in its original packaging.

Return procedure for STU27N3LH5:

1.Submit a request within 90 days.

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

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