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

STMicroelectronics STD38NH02L-1

Name: STD38NH02L-1
Brand: STMicroelectronics
SKU: STD38NH02L-1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STD38NH02L-1

Manufacturer:: STMicroelectronics

Category:: FETs, MOSFETs

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

Datasheet:: STD38NH02L-1.pdf

Description:: MOSFET N-CH 24V 38A IPAK

Quantity:: RFQ Add To RFQ list

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Inventory:7,303

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Product details

Overview

STD38NH02L-1 from STMicroelectronics is an N-channel logic-level Power MOSFET in IPAK (TO-251) package, rated for 24 V V_DSS, 38 A continuous drain current at T_C = 25°C, and R_DS(on) ≤ 0.0135 Ω at V_GS = 10 V. It features low gate charge (Q_g = 18 nC), fast switching (t_f = 12 ns), and optimized for high-efficiency DC-DC synchronous buck converters.

For engineers reviewing the STD38NH02L-1 datasheet, STD38NH02L-1 pinout, STD38NH02L-1 application, or STD38NH02L-1 equivalent, this device is selected for low-voltage, high-current power stages where conduction loss minimization, gate drive simplicity (logic-level threshold), and avalanche ruggedness (E_AS = 250 mJ) are critical design requirements.

Technical Context

This MOSFET employs ST's STripFET™ III process to achieve industry-leading R_DS(on) × Q_g product, directly reducing both conduction and switching losses in hard-switched topologies. Its 1.0–2.5 V gate threshold enables direct drive from 3.3 V or 5 V controllers without level-shifting.

The device exhibits low C_oss (305 pF) and C_rss (45 pF), supporting efficient zero-voltage switching (ZVS) transition in resonant designs. Its source-drain diode has t_rr = 27 ns and Q_rr = 22 nC at 150°C, enabling robust synchronous rectification with minimal reverse recovery penalty.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	24 V - Maximum blocking voltage in DC-DC output stage; compatible with 24 V bus systems and 12 V input rails with margin.
R_DS(on)	≤ 0.0135 Ω @ V_GS = 10 V - Enables <1 W conduction loss at 38 A, critical for thermal management in compact converters.
I_D (cont)	38 A @ T_C = 25°C - Supports high-current low-side switch in 100–200 W buck regulators without paralleling.
Q_g	18 nC - Reduces gate driver power dissipation and allows use of low-cost 1-A drivers (e.g., STMicro's STGAP2S).
E_AS	250 mJ - Withstands unclamped inductive switching events in motor drives or hot-swap circuits without failure.
t_f	12 ns - Minimizes switching transition time, reducing overlap loss in synchronous rectifiers.
R_thj-case	3.75 °C/W - Enables 40 W power dissipation with ≤150°C junction rise over case, supporting heatsink-free operation up to ~15 W.

Pinout & Package

STD38NH02L-1 uses the TO-251 (IPAK) surface-mount package with three terminals: Gate (G), Drain (D), and Source (S). The exposed drain pad provides low thermal resistance and serves as the primary heat path to the PCB copper pour.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control electrode	Logic-compatible input requiring ≤2.5 V threshold; connects to PWM controller output via series resistor (typically 4.7 Ω) to damp ringing.
2 (Drain)	High-side current path	Internally connected to large copper die pad; must be soldered to ≥2 cm² thermal pad on PCB for R_thj-amb ≤ 40 °C/W.
3 (Source)	Reference node / return path	Serves as local ground reference for gate drive; routed with low-inductance trace to minimize V_GS noise during switching.

Key Features

Feature	Design Value
STripFET™ III technology	Delivers lowest R_DS(on) × Q_g ratio in its class, enabling >95% efficiency in 12 V → 3.3 V/20 A buck converters.
Logic-level gate drive	Operates fully enhanced at V_GS = 4.5 V, eliminating need for gate boosters in microcontroller-driven power supplies.
Low Q_rr and fast t_rr	22 nC Q_rr and 27 ns t_rr reduce cross-conduction risk and EMI in synchronous rectification.
Avalanche-rated	Guaranteed single-pulse E_AS = 250 mJ supports reliable operation under load dump or short-circuit conditions.
ECOPACK® RoHS-compliant	Lead-free second-level interconnect meets JEDEC JESD97; suitable for industrial and consumer applications with environmental compliance needs.

Applications

DC-DC Synchronous Buck Converter

Motor Drive Half-Bridge

Use Scenario: 24 V input to 5 V/15 A point-of-load regulator in telecom base station power modules.

IC Role / Device Role / Timing Role: Low-side synchronous rectifier switch operating at 300 kHz with 60% duty cycle.

Use Value: R_DS(on) ≤ 0.0135 Ω limits conduction loss to 3.1 W, while Q_g = 18 nC enables clean 12 ns fall time without gate oscillation.

Use Scenario: 24 V H-bridge driving a 12 V brushed DC fan in HVAC control unit.

IC Role / Device Role / Timing Role: High-current quadrant switch handling bidirectional 30 A peak loads with PWM commutation.

Use Value: 152 A pulsed rating (I_DM) and 250 mJ E_AS withstand motor stall currents and inductive kickback without snubbers.

Hot-Swap Controller

LED Driver Current Switch

Use Scenario: Inrush-limited 24 V board insertion in modular server backplanes.

IC Role / Device Role / Timing Role: Main pass element controlled by dedicated hot-swap IC (e.g., LTC4215) for soft-start and current limiting.

Use Value: Low R_DS(on) ensures <0.5 V drop at 30 A, minimizing power loss during steady-state operation.

Use Scenario: Constant-current dimming of high-brightness LED strings in automotive interior lighting.

IC Role / Device Role / Timing Role: PWM-controlled current sink switching at 1 kHz to regulate average LED current.

Use Value: Fast 12 ns fall time eliminates visible flicker; low V_SD = 1.3 V at 19 A reduces forward voltage penalty in current-sense path.

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
IRF7470PBF	R_DS(on) = 0.012 Ω @ 10 V but Q_g = 26 nC; higher gate charge increases driver loss and slows switching.	Less suitable for high-frequency (>500 kHz) buck converters due to elevated switching loss.	Prefer when lower R_DS(on) dominates over gate drive complexity and frequency.
STP36NF06L	V_DSS = 60 V, R_DS(on) = 0.022 Ω @ 10 V, Q_g = 35 nC - higher voltage rating but significantly higher conduction and switching losses.	Better for 48 V systems; over-specified and less efficient in 24 V applications.	Select only if system requires 60 V blocking capability or legacy footprint compatibility.

Compared with IRF7470PBF and STP36NF06L, STD38NH02L-1 delivers optimal balance of low R_DS(on), low Q_g, and logic-level drive for 24 V synchronous buck stages-achieving highest efficiency per mm² PCB area and lowest gate driver cost.

Availability

STD38NH02L-1 is available at Aetrix Electronics and suitable for DC-DC converters, motor drives, and hot-swap circuits requiring stable component supply, long-term industrial lifecycle support, and RoHS-compliant packaging.

Supply support for STD38NH02L-1 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

This device belongs to ST's STripFET™ III Power MOSFET product line, engineered specifically for high-efficiency, high-density power conversion in low-voltage (<30 V) applications such as point-of-load regulation and motor control.

FAQ

What is the maximum safe operating temperature for STD38NH02L-1?

The maximum operating junction temperature (T_j) is 175°C, and the maximum lead temperature for soldering is 275°C. For reliable long-term operation, junction temperature should be maintained below 150°C using appropriate PCB copper area (≥2 cm² thermal pad) and ambient airflow. Derating begins at 25°C case temperature with 0.27 W/°C reduction in P_tot.

Can STD38NH02L-1 be used as a high-side switch?

No-it is optimized as a low-side switch due to its logic-level gate threshold and lack of integrated bootstrap circuitry. As a high-side switch, it would require a floating gate driver with voltage translation (e.g., bootstrap capacitor + high-side driver IC like STGAP2S), increasing complexity and cost versus using a dedicated high-side MOSFET or half-bridge module.

Does STD38NH02L-1 have built-in ESD protection?

Yes-the device includes on-chip gate protection diodes rated for ±100 nA gate leakage at ±20 V, providing Class 1B HBM ESD immunity (≥2 kV) per JEDEC JS-001. However, external TVS clamping is still recommended on gate traces in noisy environments to prevent latch-up from fast transients exceeding absolute maximum ratings.

Is there a DPAK variant of this part?

Yes-STD38NH02LT4 is the DPAK (TO-252) version, sharing identical electrical specifications (V_DSS, R_DS(on), I_D, Q_g) but differing in thermal resistance (R_thj-case = 4.5 °C/W vs. 3.75 °C/W for IPAK) and mechanical footprint. DPAK offers easier manual rework; IPAK provides superior thermal performance in automated assembly.

STD38NH02L-1 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: STripFET™ III

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):: 24 V

Current - Continuous Drain (Id) @ 25°C:: 38A (Tc)

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

Rds On (Max) @ Id, Vgs:: 13.5mOhm @ 19A, 10V

Vgs(th) (Max) @ Id:: 2.5V @ 250µA

Gate Charge (Qg) (Max) @ Vgs:: 24 nC @ 10 V

Vgs (Max):: ±20V

Input Capacitance (Ciss) (Max) @ Vds:: 1070 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 40W (Tc)

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: IPAK

STD38NH02L-1 FAQ

1.How can I place an order for STD38NH02L-1 through Aetrix?

Please submit a Request for Quotation (RFQ) for STD38NH02L-1 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 STD38NH02L-1 reliable?

The price and inventory of STD38NH02L-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STD38NH02L-1 is usually 5 days.

3.What payment methods are accepted for STD38NH02L-1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STD38NH02L-1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STD38NH02L-1?

STD38NH02L-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STD38NH02L-1 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 STD38NH02L-1?

For technical support, including STD38NH02L-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STD38NH02L-1 requirements.

6.How does Aetrix verify that STD38NH02L-1 is sourced from the original manufacturer or authorized distributors?

All STD38NH02L-1 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 STD38NH02L-1 meets industry standards.

7.What is the process for return or replacement of STD38NH02L-1?

All STD38NH02L-1 units undergo pre-shipment inspection (PSI). If there is an issue with STD38NH02L-1, 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 STD38NH02L-1 part is unused and in its original packaging.

Return procedure for STD38NH02L-1:

1.Submit a request within 90 days.

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

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