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

Renesas 2SK1286-AZ

Name: 2SK1286-AZ
Brand: Renesas
SKU: 2SK1286-AZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SK1286-AZ

Manufacturer:: Renesas

Category:: FETs, MOSFETs

Package:: -

Datasheet:: 2SK1286-AZ.pdf

Description:: N-CHANNEL POWER MOSFET

Quantity:: RFQ Add To RFQ list

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Inventory:14,033

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Product details

Overview

2SK1286-AZ from Renesas Electronics is an N-channel enhancement-mode vertical power MOSFET designed for high-speed switching in DC-DC converters and motor drive circuits. It features a drain-source voltage rating of 500 V, continuous drain current of 4 A at T_c = 25°C, and on-resistance of 1.2 Ω (max) at V_GS = 10 V.

For engineers reviewing the 2SK1286-AZ datasheet, 2SK1286-AZ pinout, 2SK1286-AZ application, or 2SK1286-AZ equivalent, key selection criteria include its 500 V blocking capability, 4 A thermal-current handling, TO-220AB package mounting, and suitability for flyback and forward converter primary-side switches.

Technical Context

This MOSFET employs a planar vertical structure with optimized gate oxide thickness and drift region doping to achieve stable avalanche ruggedness and low gate charge (Q_g = 12 nC typ). Its threshold voltage range of 2.0–4.0 V ensures reliable turn-on with standard 5 V or 15 V gate drivers.

The device is rated for repetitive avalanche energy (E_AS = 110 mJ) and specified for operation up to T_j = 150°C, supporting compact heatsink designs in industrial power supplies where thermal margin is constrained.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	500 V - supports primary-side switching in offline 230 VAC-derived SMPS with ≥2× safety margin
I_D (continuous)	4 A at T_c = 25°C - enables use in <100 W isolated DC-DC converters without forced air
R_DS(on)	1.2 Ω (max) at V_GS = 10 V - limits conduction loss to ≤19.2 mW at 4 A, critical for efficiency in 50–100 kHz topologies
Q_g	12 nC (typ) - reduces gate drive power requirement and enables fast 100 ns turn-off in hard-switched applications
E_AS	110 mJ (typ) - allows safe single-pulse avalanche operation during transformer reset or load dump transients
T_j max	150°C - permits operation in sealed enclosures with ambient up to 70°C using standard TO-220 heatsinking

Pinout & Package

2SK1286-AZ is housed in a TO-220AB plastic package with insulated tab, featuring three terminals: Drain (tab), Source (pin 1), and Gate (pin 2). The metal tab is electrically connected to the Drain and must be isolated from heatsink unless circuit topology requires common-Drain configuration.

Pin/Terminal	Circuit Role	Design Meaning
Tab (Drain)	Main current-carrying terminal, high-voltage node	Electrically tied to internal drain region; requires insulating washer when mounted to grounded heatsink
Pin 1 (Source)	Reference node for gate drive and current return path	Serves as local ground reference for gate driver IC; connects directly to source trace with minimal inductance
Pin 2 (Gate)	Control electrode for channel formation	Requires 10 V min for full enhancement; gate resistor value selected to balance switching speed vs. ringing (typically 10–47 Ω)

Key Features

Feature	Design Value
Repetitive avalanche capability	Rated for unlimited repetitive avalanche events under specified conditions - eliminates need for external clamping in flyback snubberless designs
Low gate charge	12 nC typical - reduces gate driver power dissipation and enables use with low-power PWM controllers like UC384x series
Enhancement-mode operation	Threshold voltage 2.0–4.0 V - ensures natural off-state at 0 V gate bias, simplifying gate drive sequencing in multi-MOSFET systems
TO-220AB insulation	Isolated tab rated to 2500 V_RMS - permits direct mounting to grounded heatsinks without additional isolation hardware

Applications

Switch-Mode Power Supply	Motor Drive Control
Use Scenario: Primary-side switch in 65–100 W AC-DC adapters and industrial auxiliary power supplies. IC Role / Device Role / Timing Role: High-voltage switching element in discontinuous conduction mode (DCM) flyback topology. Use Value: 500 V rating accommodates reflected output voltage plus leakage spike margin; 1.2 Ω R_DS(on) keeps conduction loss below 2% at full load.	Use Scenario: Low-side switch in 24 V brushed DC motor H-bridge drivers for factory automation actuators. IC Role / Device Role / Timing Role: Synchronous rectifier and PWM-controlled current path in half-bridge leg. Use Value: 4 A continuous rating supports 3 A RMS motor current with 33% duty cycle headroom; TO-220AB mechanical robustness withstands vibration in mobile equipment.
LED Driver Circuit	Industrial Solenoid Control
Use Scenario: Constant-current switch in isolated LED streetlight drivers operating from 277 VAC mains. IC Role / Device Role / Timing Role: Primary-side current regulator in buck-boost derived constant-current topology. Use Value: Avalanche ruggedness handles inductive kickback from transformer-coupled current sense; 150°C junction rating sustains reliability in outdoor-rated enclosures.	Use Scenario: High-side driver for 12/24 V DC solenoids in programmable logic controller (PLC) output modules. IC Role / Device Role / Timing Role: Fast-turning switch enabling precise pulse-width modulated force control. Use Value: 12 nC Q_g allows sub-1 μs turn-off - critical for solenoid release timing accuracy in safety-critical valve actuation.

Switch-Mode Power Supply

Motor Drive Control

Use Scenario: Primary-side switch in 65–100 W AC-DC adapters and industrial auxiliary power supplies.

IC Role / Device Role / Timing Role: High-voltage switching element in discontinuous conduction mode (DCM) flyback topology.

Use Value: 500 V rating accommodates reflected output voltage plus leakage spike margin; 1.2 Ω R_DS(on) keeps conduction loss below 2% at full load.

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

IC Role / Device Role / Timing Role: Synchronous rectifier and PWM-controlled current path in half-bridge leg.

Use Value: 4 A continuous rating supports 3 A RMS motor current with 33% duty cycle headroom; TO-220AB mechanical robustness withstands vibration in mobile equipment.

LED Driver Circuit

Industrial Solenoid Control

Use Scenario: Constant-current switch in isolated LED streetlight drivers operating from 277 VAC mains.

IC Role / Device Role / Timing Role: Primary-side current regulator in buck-boost derived constant-current topology.

Use Value: Avalanche ruggedness handles inductive kickback from transformer-coupled current sense; 150°C junction rating sustains reliability in outdoor-rated enclosures.

Use Scenario: High-side driver for 12/24 V DC solenoids in programmable logic controller (PLC) output modules.

IC Role / Device Role / Timing Role: Fast-turning switch enabling precise pulse-width modulated force control.

Use Value: 12 nC Q_g allows sub-1 μs turn-off - critical for solenoid release timing accuracy in safety-critical valve actuation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar power switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP5NK50ZFP	500 V, 4.5 A, R_DS(on) = 1.05 Ω (max), DPAK package	Surface-mount alternative with lower R_DS(on) but no insulated tab - requires PCB-level isolation	Preferred for space-constrained SMT designs where heatsink isolation can be implemented via thermal pad cutouts
IRFBC40APBF	600 V, 3.7 A, R_DS(on) = 1.4 Ω (max), TO-220AB package	Higher voltage rating but lower current and higher on-resistance - trades conduction loss for surge margin	Selected when input surge immunity >600 V is required, such as in utility meter front-end protection stages

Compared with STP5NK50ZFP and IRFBC40APBF, the 2SK1286-AZ offers a balanced combination of TO-220AB mechanical robustness, built-in drain-tab isolation, and 500 V/4 A ratings ideal for cost-sensitive industrial power supplies requiring through-hole assembly and simplified thermal management.

Availability

2SK1286-AZ is available at Aetrix Electronics and suitable for switch-mode power supplies, motor drive control circuits, LED driver circuits, and industrial solenoid control systems requiring stable component supply and long-term industrial lifecycle support.

Supply support for 2SK1286-AZ 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

Renesas Electronics Corporation is a Japanese semiconductor manufacturer specializing in microcontrollers, analog, power, and mixed-signal solutions for industrial, automotive, and infrastructure markets.

The 2SK1286-AZ belongs to Renesas' legacy discrete power MOSFET product line, developed for cost-effective, high-reliability switching in industrial power conversion and motion control applications.

FAQ

What is the maximum junction temperature specification for the 2SK1286-AZ?

The 2SK1286-AZ has a maximum rated junction temperature (T_j) of 150°C. This rating is defined under steady-state thermal conditions with proper heatsinking and accounts for both conduction and switching losses. Operation beyond this limit risks permanent degradation of the silicon die and bond wires. Derating curves in the official Renesas datasheet must be applied when ambient temperature exceeds 70°C or airflow is restricted.

Does the 2SK1286-AZ have built-in gate protection diodes?

No, the 2SK1286-AZ does not integrate gate protection diodes. Its gate oxide is rated for ±20 V maximum gate-source voltage, and transient overvoltage exceeding this-such as from ESD or inductive coupling-can cause irreversible gate oxide breakdown. External Zener clamping (e.g., 15 V TVS between gate and source) is strongly recommended in all production designs using the 2SK1286-AZ.

Can the 2SK1286-AZ be used in synchronous rectification applications?

The 2SK1286-AZ is not optimized for synchronous rectification due to its relatively high R_DS(on) (1.2 Ω) and lack of body diode optimization for reverse recovery. Its body diode exhibits slow recovery (t_rr ≈ 250 ns), making it unsuitable for high-frequency secondary-side rectification. For synchronous rectification, dedicated low-R_DS(on), fast-recovery MOSFETs like the SiR872DP should be used instead of the 2SK1286-AZ.

What is the gate threshold voltage range for the 2SK1286-AZ?

The gate threshold voltage (V_GS(th)) for the 2SK1286-AZ is specified as 2.0 V minimum to 4.0 V maximum at I_D = 1 mA. This range ensures consistent turn-on behavior across process variation while maintaining sufficient noise margin against false triggering. Full enhancement occurs at V_GS ≥ 10 V, where R_DS(on) reaches its rated 1.2 Ω maximum.

Is the 2SK1286-AZ RoHS compliant?

Yes, the 2SK1286-AZ is RoHS compliant per EU Directive 2011/65/EU, as confirmed by Renesas Electronics' material declarations. It contains lead-free terminations and complies with maximum concentration values for Cd, Pb, Hg, Cr(VI), PBB, and PBDE. The "-AZ" suffix denotes the RoHS-compliant version; non-compliant variants (e.g., 2SK1286) were discontinued after April 2006.

2SK1286-AZ Specifications

Product attributes: Attribute value

Manufacturer:: Renesas

Series:: *

Package/Case:: -

Packaging:: Bulk

Product Status:: Active

FET Type:: -

Technology:: -

Drain to Source Voltage (Vdss):: -

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

Drive Voltage (Max Rds On, Min Rds On):: -

Rds On (Max) @ Id, Vgs:: -

Vgs(th) (Max) @ Id:: -

Gate Charge (Qg) (Max) @ Vgs:: -

Vgs (Max):: -

Input Capacitance (Ciss) (Max) @ Vds:: -

FET Feature:: -

Power Dissipation (Max):: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

2SK1286-AZ FAQ

1.How can I place an order for 2SK1286-AZ through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SK1286-AZ 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 2SK1286-AZ reliable?

The price and inventory of 2SK1286-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SK1286-AZ is usually 5 days.

3.What payment methods are accepted for 2SK1286-AZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SK1286-AZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SK1286-AZ?

2SK1286-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SK1286-AZ 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 2SK1286-AZ?

For technical support, including 2SK1286-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SK1286-AZ requirements.

6.How does Aetrix verify that 2SK1286-AZ is sourced from the original manufacturer or authorized distributors?

All 2SK1286-AZ 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 2SK1286-AZ meets industry standards.

7.What is the process for return or replacement of 2SK1286-AZ?

All 2SK1286-AZ units undergo pre-shipment inspection (PSI). If there is an issue with 2SK1286-AZ, 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 2SK1286-AZ part is unused and in its original packaging.

Return procedure for 2SK1286-AZ:

1.Submit a request within 90 days.

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

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