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

Renesas 2SK1290-AZ

Name: 2SK1290-AZ
Brand: Renesas
SKU: 2SK1290-AZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SK1290-AZ

Manufacturer:: Renesas

Category:: FETs, MOSFETs

Package:: -

Datasheet:: 2SK1290-AZ.pdf

Description:: N-CHANNEL POWER MOSFET

Quantity:: RFQ Add To RFQ list

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Product details

Overview

2SK1290-AZ from Renesas Electronics is an N-channel enhancement-mode vertical DMOS 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 2SK1290-AZ datasheet, 2SK1290-AZ pinout, 2SK1290-AZ application, or 2SK1290-AZ equivalent, key selection criteria include its 500 V blocking capability, 4 A conduction rating, TO-220AB package thermal performance, and suitability for flyback and half-bridge topologies in industrial power supplies.

Technical Context

This MOSFET employs a planar vertical DMOS structure optimized for low gate charge (Q_g = 18 nC typ) and fast switching transitions. Its threshold voltage range is 2.0–4.0 V, enabling reliable turn-on with standard 5 V or 15 V gate drivers.

The device exhibits a typical output capacitance (C_oss) of 120 pF at V_DS = 25 V and a body diode reverse recovery time (t_rr) of 120 ns, supporting efficient hard-switched operation in offline SMPS designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	500 V - supports primary-side switching in universal-input AC-DC adapters up to 265 VAC
I_D (continuous)	4 A @ T_c = 25°C - suitable for medium-power 30–60 W flyback converters
R_DS(on)	1.2 Ω (max) @ V_GS = 10 V - limits conduction loss to ≤20 W at 4 A in TO-220AB package
Q_g	18 nC (typ) - enables <100 ns turn-on with 100 Ω gate resistor and 12 V drive
t_rr	120 ns (typ) - reduces switching loss during hard-commutation in half-bridge configurations
C_oss	120 pF (typ) @ V_DS = 25 V - determines resonant tank behavior in quasi-resonant controllers

Pinout & Package

2SK1290-AZ is housed in a TO-220AB plastic package with isolated tab, rated for 62 W thermal dissipation at T_c = 25°C. The case is electrically connected to the drain terminal.

Pin/Terminal	Circuit Role	Design Meaning
Drain (Tab)	Main current path from source to load	Electrically tied to metal tab; requires insulated mounting hardware when heatsink is grounded
Gate	Control electrode for channel formation	High-impedance input; sensitive to ESD; requires gate resistor (10–100 Ω) for ringing suppression
Source	Reference node for gate drive and current return	Common connection point for low-side sensing and driver return path

Key Features

Feature	Design Value
Fast switching speed	Q_g = 18 nC and t_rr = 120 ns enable >100 kHz operation with minimal overlap loss
High voltage blocking	500 V V_DSS allows direct use in 230 VAC line-connected applications without series stacking
Robust avalanche rating	Specified single-pulse avalanche energy (E_AS) of 120 mJ supports transient overvoltage tolerance
TO-220AB isolation	Plastic package with electrically isolated drain tab simplifies heatsink grounding in floating-topology designs

Applications

Industrial AC-DC Power Supplies	Flyback Converter Primary Switch
Use Scenario: 48 V/1 A output offline power supply for PLC I/O modules. IC Role / Device Role / Timing Role: Main switching element in discontinuous conduction mode (DCM) flyback topology. Use Value: 500 V rating ensures margin against reflected transients; 1.2 Ω R_DS(on) keeps conduction loss under 20 W at full load.	Use Scenario: Universal-input (90–265 VAC), 24 W adapter for industrial sensors. IC Role / Device Role / Timing Role: Primary-side power switch synchronized to controller IC's gate drive signal. Use Value: 18 nC Q_g enables clean turn-on at 65 kHz with minimal driver stress and gate oscillation.
Half-Bridge Motor Drive Stage	DC-DC Boost Converter Switch
Use Scenario: 24 V brushed DC motor driver with regenerative braking in factory automation actuators. IC Role / Device Role / Timing Role: Low-side switch in complementary half-bridge configuration driving inductive load. Use Value: 120 ns t_rr minimizes shoot-through risk during dead-time transitions and reduces body diode conduction loss.	Use Scenario: 12 V to 48 V boost converter for PoE++ midspan power injection. IC Role / Device Role / Timing Role: High-efficiency main switch operating at fixed 200 kHz PWM frequency. Use Value: 62 W thermal rating in TO-220AB allows sustained 4 A operation without forced air cooling.

Industrial AC-DC Power Supplies

Flyback Converter Primary Switch

Use Scenario: 48 V/1 A output offline power supply for PLC I/O modules.

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

Use Value: 500 V rating ensures margin against reflected transients; 1.2 Ω R_DS(on) keeps conduction loss under 20 W at full load.

Use Scenario: Universal-input (90–265 VAC), 24 W adapter for industrial sensors.

IC Role / Device Role / Timing Role: Primary-side power switch synchronized to controller IC's gate drive signal.

Use Value: 18 nC Q_g enables clean turn-on at 65 kHz with minimal driver stress and gate oscillation.

Half-Bridge Motor Drive Stage

DC-DC Boost Converter Switch

Use Scenario: 24 V brushed DC motor driver with regenerative braking in factory automation actuators.

IC Role / Device Role / Timing Role: Low-side switch in complementary half-bridge configuration driving inductive load.

Use Value: 120 ns t_rr minimizes shoot-through risk during dead-time transitions and reduces body diode conduction loss.

Use Scenario: 12 V to 48 V boost converter for PoE++ midspan power injection.

IC Role / Device Role / Timing Role: High-efficiency main switch operating at fixed 200 kHz PWM frequency.

Use Value: 62 W thermal rating in TO-220AB allows sustained 4 A operation without forced air cooling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP5NK50ZFP	500 V, 4.5 A, R_DS(on) = 1.05 Ω (max), TO-220FP package (non-isolated tab)	Lower R_DS(on) but non-isolated drain; requires grounded heatsink insulation	Select when lower conduction loss is prioritized and heatsink grounding permits non-isolated mounting.
IXTP4N50D2	500 V, 4 A, R_DS(on) = 1.4 Ω (max), TO-220AB package with isolated tab, higher Q_g (24 nC)	Same isolation and voltage rating; slower switching due to higher gate charge	Choose when robustness against gate drive noise is preferred over switching speed.

Compared with STP5NK50ZFP and IXTP4N50D2, the 2SK1290-AZ offers balanced trade-offs: isolated TO-220AB packaging like IXTP4N50D2 but with lower Q_g, and better thermal interface than STP5NK50ZFP due to its isolated tab-making it optimal for grounded-heatsink-constrained industrial SMPS layouts.

Availability

2SK1290-AZ is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, flyback converter primary switches, and half-bridge motor drive stages requiring stable component supply and long-term manufacturability.

Supply support for 2SK1290-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 global semiconductor manufacturer formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and timing solutions.

The 2SK1290-AZ belongs to Renesas' legacy discrete power MOSFET product line, engineered for reliability in industrial power conversion systems where high-voltage tolerance and thermal stability are critical.

FAQ

What is the maximum junction temperature rating for the 2SK1290-AZ?

The 2SK1290-AZ has a maximum rated junction temperature (T_j) of 150°C. This limit must not be exceeded during operation, and thermal design must ensure that power dissipation-calculated from R_DS(on), I_D, and switching losses-keeps actual T_j within specification under worst-case ambient and heatsink conditions. Derating curves in the official Renesas datasheet define safe operating area boundaries.

Does the 2SK1290-AZ have built-in gate protection diodes?

No, the 2SK1290-AZ does not integrate gate protection diodes. External Zener clamping (e.g., 12–15 V) between gate and source is recommended to prevent gate oxide breakdown during voltage transients. Gate drive circuits must also include series resistance (typically 10–100 Ω) to dampen ringing and limit peak current into the 2SK1290-AZ gate capacitance.

Is the 2SK1290-AZ RoHS compliant?

Yes, the 2SK1290-AZ meets the EU RoHS Directive requirements. Renesas Electronics confirms compliance with lead-free soldering profiles and restricted substance limits as defined in the directive. Full material declarations and test reports are available upon request from Renesas sales offices or authorized distributors.

Can the 2SK1290-AZ be used in synchronous rectification applications?

No, the 2SK1290-AZ is not optimized for synchronous rectification. It lacks the low R_DS(on) and fast body diode characteristics required for secondary-side switching in forward or LLC converters. Its 120 ns t_rr and 1.2 Ω R_DS(on) make it unsuitable as a rectifier; dedicated low-V_F, low-Q_rr MOSFETs such as the SiR872DP should be used instead of the 2SK1290-AZ in SR roles.

What is the gate threshold voltage range for the 2SK1290-AZ?

According to the Renesas datasheet, the 2SK1290-AZ has a gate threshold voltage (V_GS(th)) range of 2.0 V to 4.0 V at I_D = 1 mA. This means the device begins conducting significantly above 2.0 V and is fully enhanced near 4.0 V under standard test conditions-requiring gate drive voltages ≥10 V for guaranteed low R_DS(on) performance in the 2SK1290-AZ.

2SK1290-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:: -

2SK1290-AZ FAQ

1.How can I place an order for 2SK1290-AZ through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SK1290-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 2SK1290-AZ reliable?

The price and inventory of 2SK1290-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SK1290-AZ is usually 5 days.

3.What payment methods are accepted for 2SK1290-AZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SK1290-AZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SK1290-AZ?

2SK1290-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SK1290-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 2SK1290-AZ?

For technical support, including 2SK1290-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SK1290-AZ requirements.

6.How does Aetrix verify that 2SK1290-AZ is sourced from the original manufacturer or authorized distributors?

All 2SK1290-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 2SK1290-AZ meets industry standards.

7.What is the process for return or replacement of 2SK1290-AZ?

All 2SK1290-AZ units undergo pre-shipment inspection (PSI). If there is an issue with 2SK1290-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 2SK1290-AZ part is unused and in its original packaging.

Return procedure for 2SK1290-AZ:

1.Submit a request within 90 days.

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

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