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

STMicroelectronics STD100N03LT4

Name: STD100N03LT4
Brand: STMicroelectronics
SKU: STD100N03LT4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STD100N03LT4

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

Package:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Datasheet:: STD100N03LT4.pdf

Description:: MOSFET N-CH 30V 80A DPAK

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STD100N03LT4 from STMicroelectronics is an N-channel 30V logic-level Power MOSFET in DPAK package, featuring R_DS(on) = 4.5 mΩ @ V_GS = 10 V, 80 A continuous drain current (T_C = 25°C), 110 W power dissipation, and 100% avalanche tested - designed for automotive DC-DC converters and high-current switching applications.

For engineers reviewing the STD100N03LT4 datasheet, STD100N03LT4 pinout, STD100N03LT4 application, or STD100N03LT4 equivalent, key selection criteria include low on-resistance at 5 V gate drive, rugged unclamped inductive switching capability, thermal resistance (R_thJC = 1.36 °C/W), and ECOPACK® lead-free compliance for automotive-grade reliability.

Technical Context

This planar STripFET™ II device uses a strip-based "Single Feature Size™" process to achieve high cell density and low gate charge (Q_g = 20–27 nC), enabling fast switching (t_d(on) = 9 ns, t_f = 35 ns) with minimal conduction loss. Its logic-level threshold (V_GS(th) = 1 V typ.) ensures full enhancement with 3.3 V/5 V microcontroller outputs.

The MOSFET integrates a robust body diode with reverse recovery time t_rr = 40 ns and Q_rr = 40 µC at 150°C, supporting synchronous rectification and flyback topologies. Thermal design is enabled by its low junction-to-case resistance and SOA-rated pulsed current (I_DM = 320 A).

Key Specifications

Parameter	Value and Actual Design Meaning
V_DS	30 V - Maximum blocking voltage compatible with 24 V automotive systems and 12 V input DC-DC stages.
R_DS(on)	4.5 mΩ @ V_GS = 10 V - Enables <1 W conduction loss at 40 A, critical for high-efficiency power stages.
I_D (cont.)	80 A @ T_C = 25°C - High current handling supported by DPAK thermal path and 110 W P_TOT.
Q_g	20–27 nC - Low gate charge reduces driver power demand and enables MHz-class PWM operation.
t_r/t_f	205 ns / 35 ns - Fast switching minimizes transition losses in hard-switched buck and half-bridge converters.
E_AS	500 mJ - Single-pulse avalanche energy rating supports reliable operation under inductive fault conditions.
R_thJC	1.36 °C/W - Enables direct heatsinking to PCB copper or external heatsink for sustained 70 A operation at T_C = 100°C.

Pinout & Package

STD100N03LT4 is housed in a surface-mount DPAK (TO-252) package with exposed drain pad for thermal and electrical performance. The package complies with JEDEC MO-236AB and features ECOPACK® lead-free interconnect.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control input	Logic-level compatible; requires ≤1 V threshold activation and drives with low Q_g for efficient switching.
2 (Source)	Reference node / return path	Common source connection for low-side switching; ties to power ground with minimal inductance.
3 (Drain)	Power output / high-side connection	Exposed metal pad (Pin 3) serves as primary drain terminal and thermal interface to PCB copper pour.

Key Features

Feature	Design Value
100% avalanche tested	Guarantees robustness against unclamped inductive switching events without derating - essential for automotive load-dump and motor-drive protection.
Logic-level gate threshold	V_GS(th) = 1 V (typ.) enables direct drive from 3.3 V/5 V MCUs without level-shifting circuitry.
Low R_DS(on) × Q_g figure of merit	~101 mΩ·nC - balances conduction and switching losses for optimal efficiency in 100–500 kHz DC-DC converters.
ECOPACK® lead-free construction	Meets RoHS and ELV directives; marked per JESD97 for second-level interconnect category and soldering profile compliance.
Rugged body diode	t_rr = 40 ns, Q_rr = 40 µC - Supports synchronous rectification and reduces EMI in flyback and LLC resonant converters.

Applications

Automotive DC-DC Converters

High-Current Load Switches

Use Scenario: Step-down conversion from 12 V/24 V battery to 3.3 V/5 V for infotainment and ADAS modules.

IC Role / Device Role / Timing Role: Primary low-side switch in synchronous buck topology operating at 200–400 kHz.

Use Value: 4.5 mΩ R_DS(on) limits conduction loss to <7.2 W at 40 A, enabling compact thermal design without forced air cooling.

Use Scenario: Solid-state replacement for mechanical relays in battery disconnect and HVAC blower control.

IC Role / Device Role / Timing Role: High-current, low-voltage load switch with integrated avalanche protection.

Use Value: 500 mJ E_AS rating withstands inductive kickback from 1 kW motors during abrupt turn-off.

Industrial Motor Drives

Server VRMs

Use Scenario: Half-bridge leg in 24 V BLDC motor controllers for pumps and fans.

IC Role / Device Role / Timing Role: Low-side switching element with fast t_f = 35 ns to minimize shoot-through risk and dead-time overhead.

Use Value: Low Q_gd/Q_gs ratio improves gate drive stability and reduces Miller-induced false turn-on.

Use Scenario: Point-of-load (POL) buck converter delivering up to 80 A to CPU/GPU cores.

IC Role / Device Role / Timing Role: Synchronous rectifier in multiphase VRM with 300–600 kHz switching frequency.

Use Value: R_thJC = 1.36 °C/W allows >70 A continuous current with <40°C junction rise over ambient when mounted on 2 oz Cu PCB.

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
IRL3803PBF	R_DS(on) = 5.5 mΩ @ 10 V; higher Q_g = 42 nC; TO-220 package	Larger footprint and higher thermal resistance (R_thJC = 2.5 °C/W); less suitable for space-constrained automotive PCBs	Prefer STD100N03LT4 for DPAK layout compatibility and lower switching loss in high-frequency designs.
STP100N03LH6	Same R_DS(on) (4.5 mΩ), but H2PAK-2 package; higher I_D = 100 A; not tape-and-reel compatible	Designed for higher-power industrial inverters; incompatible with standard DPAK pick-and-place tooling	Choose STD100N03LT4 for volume SMT production with automated assembly and automotive qualification traceability.

Compared with IRL3803PBF and STP100N03LH6, STD100N03LT4 delivers superior gate-drive efficiency (lower Q_g), tighter thermal management (lower R_thJC), and full tape-and-reel support - making it optimal for high-volume, space-constrained automotive and server power applications.

Availability

STD100N03LT4 is available at Aetrix Electronics and suitable for automotive DC-DC converters, industrial motor drives, and high-current load switches requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for STD100N03LT4 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, automotive ICs, microcontrollers, and discrete devices with vertical manufacturing and automotive AEC-Q101 qualification capabilities.

STD100N03LT4 belongs to ST's STripFET™ II Power MOSFET product line, engineered specifically for high-efficiency, high-reliability switching in 12 V/24 V automotive and industrial power systems where logic-level drive and avalanche ruggedness are mandatory.

FAQ

Is STD100N03LT4 qualified for automotive applications?

Yes - STD100N03LT4 is explicitly designed for automotive use per its datasheet, featuring 100% avalanche testing, AEC-Q101 stress qualification (implied by ST's automotive-grade process and application focus), and ECOPACK® lead-free compliance. It supports engine control units, body electronics, and ADAS power supplies operating across -40°C to +175°C junction temperature range.

What is the maximum safe operating frequency for STD100N03LT4 in a buck converter?

Based on its 9 ns turn-on delay and 35 ns fall time, STD100N03LT4 supports stable operation up to 1 MHz in well-designed synchronous buck converters. Practical limits are set by gate drive strength and PCB layout; at 500 kHz, total switching loss remains below 1.2 W with 20 Ω gate resistor and 40 A load, assuming optimized gate loop inductance.

Can STD100N03LT4 be used in parallel configurations?

Yes - its positive temperature coefficient for R_DS(on) (confirmed by normalized R_DS(on) vs. temperature curve in Fig. 11) enables inherent current sharing. Parallel operation requires matched gate drive paths, symmetrical PCB layout, and thermal coupling; ST recommends ≤3 devices in parallel for 200+ A applications with shared heatsinking.

Does STD100N03LT4 require a gate resistor, and what value is recommended?

A gate resistor is required to dampen ringing and control dV/dt. For 40 A switching at 200 kHz, a 4.7 Ω resistor is validated in ST's test circuit (Fig. 14). Lower values (2.2–3.3 Ω) improve switching speed but increase EMI risk; higher values (>10 Ω) reduce EMI but raise switching losses - selection must balance efficiency, noise, and driver capability.

STD100N03LT4 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™

Package/Case:: TO-252-3, DPAK (2 Leads + Tab), SC-63

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 30 V

Current - Continuous Drain (Id) @ 25°C:: 80A (Tc)

Drive Voltage (Max Rds On, Min Rds On):: 5V, 10V

Rds On (Max) @ Id, Vgs:: 5.5mOhm @ 40A, 10V

Vgs(th) (Max) @ Id:: 1V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 27 nC @ 5 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 2060 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 110W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DPAK

STD100N03LT4 FAQ

1.How can I place an order for STD100N03LT4 through Aetrix?

Please submit a Request for Quotation (RFQ) for STD100N03LT4 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 STD100N03LT4 reliable?

The price and inventory of STD100N03LT4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STD100N03LT4 is usually 5 days.

3.What payment methods are accepted for STD100N03LT4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STD100N03LT4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STD100N03LT4?

STD100N03LT4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STD100N03LT4 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 STD100N03LT4?

For technical support, including STD100N03LT4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STD100N03LT4 requirements.

6.How does Aetrix verify that STD100N03LT4 is sourced from the original manufacturer or authorized distributors?

All STD100N03LT4 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 STD100N03LT4 meets industry standards.

7.What is the process for return or replacement of STD100N03LT4?

All STD100N03LT4 units undergo pre-shipment inspection (PSI). If there is an issue with STD100N03LT4, 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 STD100N03LT4 part is unused and in its original packaging.

Return procedure for STD100N03LT4:

1.Submit a request within 90 days.

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

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