MOSFET Supplier
Find MOSFETs for switching, motor control, power conversion, battery protection and PCB-level load control. ApexComponent supports IRFZ44N, IRLZ44N, IRF3205, BSS138, AO3400 and related MOSFET sourcing with RFQ, BOM review and quality-control follow-up.
From keyword search to sourcing decision
Compare MOSFET types, model fit, application requirements and replacement options before sending your RFQ.
Choose the right MOSFET type for your circuit
Different MOSFET types are used for different drive conditions, polarity, board space and power levels. Use this guide to narrow the right device family before comparing exact part numbers.
N-Channel MOSFET
Commonly used for efficient low-side switching, H-bridge legs, motor control, LED loads and DC power paths where low on-resistance is important.
Check first: VDS, continuous drain current, RDS(on), package and thermal resistance.
Check first: VDS, continuous drain current, RDS(on), package and thermal resistance.
P-Channel MOSFET
Often used for high-side switching or reverse-protection circuits where simpler gate drive matters more than the lowest possible resistance.
Check first: footprint, pinout, packaging type and reel/tape requirements.
Check first: polarity, gate-source voltage limit, current and package loss.
Logic-Level MOSFET
Designed to turn on with low gate voltage from MCU, Arduino, ESP32, Raspberry Pi or other low-voltage logic outputs.
Check first: VDS, continuous drain current, RDS(on), package and thermal resistance.
Check first: RDS(on) at the real gate voltage, not only VGS(th).
Power MOSFET
Selected for DC-DC converters, battery systems, inverters, motor drivers and load switches where current, heat and switching loss matter
Check first: pulsed current, gate charge, avalanche rating and heatsink condition.
Typical searches: N-channel MOSFET, FET N channel, N type MOSFET.
SMD MOSFET
Surface-mount MOSFETs for dense PCB layouts, battery protection, portable devices, consumer electronics and board-level load switching.
Check first: VDS, continuous drain current, RDS(on), package and thermal resistance.
Check first: footprint, pinout, packaging type and reel/tape requirements.
Depletion Mode MOSFET
A normally-on MOSFET option for specialized bias circuits, current limiting, analog control, protection circuits and legacy designs.
Check first: VDS, continuous drain current, RDS(on), package and thermal resistance.
Check first: normally-on behavior, threshold voltage and replacement availability.
MOSFET package and marking inspection
Package, marking and label details help confirm that the quoted MOSFET matches the requested design.
Compare package options before purchase
TO-220, TO-247, SOT-23, SOIC-8 and DPAK packages affect footprint, heat dissipation and delivery options.
Understand the device type before replacing
Channel type and gate-drive condition should be checked before approving a substitute MOSFET.
MOSFET Sourcing Support
Source MOSFETs by Model, Type or Application
Search by part number, MOSFET type or circuit requirement. ApexComponent supports MOSFET sourcing for power control, switching, motor drivers, converters, inverters, battery systems and PCB-level load switching.
Tell us what you need to build or replace
Send your MOSFET part number, target quantity, package, voltage rating, current rating, gate-drive condition or approved alternatives. We can help check availability, compare replacements and quote suitable sourcing options.
Need a fast MOSFET sourcing check?
Share a part number list or BOM. We can review availability, package, date code, alternatives and quotation options.
Popular MOSFET Models
MOSFET Types We Source
Application-Based Sourcing
Selection and Support
KEY PARAMETERS
Read the relationships, not isolated numbers
A lower headline value is not automatically a better MOSFET. Voltage margin, gate drive, resistance, switching charge, package and temperature work as one system.
Drain-source voltage
Choose margin above the real bus voltage and expected spikes. Do not select directly at the nominal rail.
Continuous drain current
The headline current depends on case temperature and cooling. Check thermal limits and realistic PCB conditions.
On-state resistance
Compare at the gate voltage your circuit actually provides and account for the rise at operating temperature.
Gate-source drive
VGS(th) only indicates the onset of conduction. It is not the voltage for full enhancement.
Total gate charge
Lower charge can reduce driver demand and switching loss, but must be balanced against resistance and ruggedness.
Junction temperature and package
Power loss, thermal resistance, copper area, airflow and package determine whether the design stays within limits.
Selection Framework
Follow a practical MOSFET selection order
1. Define the circuit position
Low-side, high-side, H-bridge, synchronous rectification, load switch or protection circuit will lead to different MOSFET types.
2. Confirm electrical limits
Check VDS margin, drain current, pulsed current, SOA, body diode behavior and avalanche requirements.
3. Match gate drive
Use RDS(on) at your actual VGS. Do not treat VGS(th) as the operating gate voltage.
4. Check thermal design
Evaluate package, PCB copper, heatsink, airflow, switching loss and target temperature range.
5. Review package and supply
Confirm TO-220, SOT-23, SOIC-8, DPAK, reel, tray, tube, marking and date-code requirements.
6. Compare alternatives carefully
Replacement MOSFETs should be checked by electrical margin, not only package or similar part number.
APPLICATION DIRECTION
Where different MOSFETs are used
Match your circuit requirement with the right MOSFET direction before requesting price, stock or replacement support.
Motor Drivers
N-channel and power MOSFETs are common in H-bridge legs, PWM motor control and high-current DC switching.
DC-DC Converters
Check RDS(on), gate charge, switching frequency, package and thermal resistance together.
Battery Protection
Compact SMD MOSFETs and low-voltage MOSFETs are used for portable devices and protection boards.
LED and Load Switching
Logic-level MOSFETs can be used for MCU-controlled LED dimming and board-level load paths.
Inverters and Power Supplies
Higher-voltage MOSFETs, SiC MOSFETs or GaN FETs may be selected when voltage and switching loss matter.
Automotive Power
Automotive MOSFET sourcing should include qualification, temperature, transient and traceability review.
Compare popular MOSFET part numbers before sourcing
Popular MOSFET models often look interchangeable in search results, but gate-drive voltage, package, voltage rating, thermal margin and lifecycle status can change the right purchasing choice.
| Part Number | MOSFET Type | Common Use | Main Difference | Sourcing Check | View |
|---|---|---|---|---|---|
| IRFZ44N | N-Channel power MOSFET | Motor control, load switching, amplifier and DC power stages. | High-demand model, but not the best choice for low-voltage logic drive. | Confirm gate drive voltage, TO-220 package, brand, date code and replacement target. | View |
| IRLZ44N | Logic-level N-Channel | MCU switching, Arduino, ESP32, LED loads and low-voltage controls. | More suitable than IRFZ44N when the available gate drive is 5 V or lower. | Check RDS(on) at your real gate voltage and compare stock by manufacturer. | View |
| IRF3205 | High-current N-Channel | Battery systems, DC motor control and low-voltage inverter stages. | Strong current capability, but thermal design matters more than headline current. | Review package, heatsink condition, authentic source and date code before purchase. | View |
| BSS138 | Small-signal SMD MOSFET | Level shifting, small-signal switching and compact PCB designs. | Useful low-current SMD part, not a substitute for power switching MOSFETs. | Confirm SOT-23 marking, reel packaging, quantity and PCB footprint compatibility. | View |
| IRF540N | N-Channel power MOSFET | General switching, power supplies, DC loads and repair sourcing. | Common 100 V class part; RDS(on) and gate drive should be verified. | Compare IRF540N, IRF540 and newer low-loss alternatives if efficiency matters. | View |
| IRF840 | High-voltage N-Channel | Offline power supplies, high-voltage switching and lighting power stages. | Higher voltage rating, usually with higher RDS(on) than low-voltage MOSFETs. | Check switching loss, heat rise, creepage layout and approved manufacturer list. | View |
| IRF4905 | P-Channel power MOSFET | High-side switching, reverse protection and battery power paths. | P-channel control is simple, but conduction loss can be higher than N-channel solutions. | Compare with IRF9540N and other P-channel MOSFET alternatives by package and RDS(on). | View |
| AO3400 | SMD N-Channel MOSFET | Portable devices, load switches and compact low-voltage boards. | Small package with useful board-level switching capability. | Confirm package marking, reel label, moisture sensitivity and traceability. | View |
Working Principle
How a MOSFET works in practical switching
A MOSFET uses gate voltage to control current between drain and source. For sourcing and replacement, the important point is not only whether it turns on, but how fully it turns on at the available gate drive and how much heat it creates.
Read Selection GuideGate voltage is applied
The gate field controls the channel without needing steady gate current.
Channel resistance drops
Lower RDS(on) usually reduces conduction loss, but only at the specified gate voltage.
Current creates heat
Package, PCB copper, airflow and switching frequency decide whether the MOSFET stays reliable.
MOSFET Guides & Sourcing Articles
Explore practical articles on MOSFET selection, replacement checks, power switching, converter circuits and sourcing decisions.
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Read MoreMOSFET Advantages
Why MOSFETs are widely used in power and switching circuits
Fast switching
Useful for PWM, DC-DC converters, motor drivers and compact power circuits.
Low drive power
The voltage-controlled gate makes MOSFETs convenient for many control circuits.
Low conduction loss
Low RDS(on) parts can reduce heat when selected with the correct gate drive.
Many packages
TO-220, TO-247, DPAK, D2PAK, SOT-23 and SOIC-8 support different assembly needs.
WHY APEXCOMPONENT
Why choose us for MOSFET sourcing
Model and alternative support
We help compare requested MOSFET models, possible alternatives, package options and lifecycle risk before quotation.
BOM-oriented communication
You can send partial BOMs, long part lists, target quantities and manufacturer preferences for review.
Procurement-focused response
RFQ support can include stock status, lead time, date code, packaging and sourcing notes.
Inventory and sourcing capacity
We help review stock availability, lead time, quantity, package and manufacturer options for your MOSFET request.
Visible inspection process
Part markings, labels, packaging and order details can be checked to reduce mismatch and sourcing risk.
Packaging before shipment
Packaging condition, quantity labels and anti-static protection are reviewed according to order requirements.
QUALITY CONTROL AND AFTER-SALES SUPPORT
Quality checks buyers expect before MOSFET shipment
For MOSFET sourcing, trust is built through visible checks: label consistency, package condition, document support and follow-up when an order needs review.
Label and marking check
Review part number, manufacturer marking, package label, lot code and visible consistency.
Packaging inspection
Check reel, tube, tray, moisture barrier, anti-static packaging and shipping protection.
Document support
Provide available datasheet, quotation, invoice, packing information and traceability records where applicable.
After-sales follow-up
Support replacement review, delivery questions and issue escalation based on order evidence.
Frequently Asked Questions
Common MOSFET Questions for Selection and Sourcing
What is a MOSFET used for?
A MOSFET is commonly used for switching, power control, motor drivers, DC-DC converters, battery protection, LED dimming, load switching and inverter circuits. It controls current between drain and source by applying voltage to the gate.
How do I choose the right MOSFET?
Start with circuit position, voltage rating, current requirement, gate-drive voltage, RDS(on), package, thermal design and switching frequency. For sourcing, also check manufacturer, date code, package type and replacement availability.
What is the difference between N-channel and P-channel MOSFETs?
N-channel MOSFETs are often used for efficient low-side switching and high-current paths. P-channel MOSFETs are commonly used for high-side switching or reverse-protection circuits where simpler gate drive may be preferred.
What is a logic-level MOSFET?
A logic-level MOSFET can turn on with lower gate voltage from MCU, Arduino, ESP32, Raspberry Pi or other low-voltage control signals. Always compare RDS(on) at the actual gate voltage, not only the VGS(th) value.
Why does a MOSFET get hot?
MOSFET heating can come from high RDS(on), insufficient gate drive, excessive current, switching loss, poor PCB copper area, limited airflow or an unsuitable package. The current rating alone is not enough to confirm thermal reliability.
Can one MOSFET be replaced by another model?
Sometimes, but the replacement should be checked by VDS, ID, RDS(on), VGS, gate charge, package, pinout, thermal resistance and application conditions. A similar part number or package does not always mean it is electrically interchangeable.
Can ApexComponent help source obsolete or hard-to-find MOSFETs?
Yes. ApexComponent can help review obsolete MOSFET requirements, check available sourcing channels, compare possible alternatives and provide quotation options based on package, specification and quantity requirements.
How does ApexComponent check MOSFET quality before shipment?
Quality checks may include part number review, manufacturer marking, package condition, label consistency, quantity check, anti-static packaging review and document support where available.
Can you support BOM-based MOSFET sourcing?
Yes. You can send a full or partial BOM with MOSFET part numbers, quantities and package requirements. We can help review availability, alternative options, sourcing risk and quotation details.
Can you provide datasheets or technical documents?
When available, ApexComponent can provide datasheets, quotation information, packing details, invoices and supporting documents. For critical applications, buyers should also verify the latest manufacturer datasheet before approval.
What information should I provide for a MOSFET quotation?
Please provide the part number, manufacturer preference, target quantity, package, date-code requirement, application notes and any approved alternatives. If you have a BOM, you can send the BOM for faster review.
What after-sales support is available?
ApexComponent can support order follow-up, delivery questions, label or package review, replacement discussion and issue escalation based on order evidence and sourcing records.
Need MOSFET models, alternatives or BOM support?
Send MOSFET part numbers, target quantity, package, date-code needs and application notes. ApexComponent can help with sourcing, alternatives, quality checks and RFQ follow-up.