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

Renesas 2SK3305-S-AZ

Name: 2SK3305-S-AZ
Brand: Renesas
SKU: 2SK3305-S-AZ
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 2SK3305-S-AZ

Manufacturer:: Renesas

Category:: FETs, MOSFETs

Package:: -

Datasheet:: 2SK3305-S-AZ.pdf

Description:: N-CHANNEL POWER MOSFET

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Product details

Overview

2SK3305-S-AZ from Renesas Electronics is an N-channel enhancement-mode power MOSFET in TO-262 (IPAK) package, designed for high-voltage switching applications including AC adapters and offline SMPS. It delivers 500 V V_DSS, 1.5 Ω R_DS(on) max at V_GS = 10 V and I_D = 2.5 A, 13 nC total gate charge, and rated for 75 W at T_C = 25°C with built-in avalanche capability (E_AS = 125 mJ).

For engineers reviewing the 2SK3305-S-AZ datasheet, 2SK3305-S-AZ pinout, 2SK3305-S-AZ application, or 2SK3305-S-AZ equivalent, this device is selected for robustness in flyback and forward converter primary-side switching where low Q_G, stable R_DS(on) over temperature, and single-pulse avalanche energy are critical design requirements.

Technical Context

The 2SK3305-S-AZ employs a DMOS silicon process optimized for high-voltage operation and fast switching. Its gate structure supports ±30 V V_GSS rating and exhibits low input capacitance (C_iss = 700 pF), enabling efficient drive with standard gate drivers. The body diode has VF(S-D) = 0.9 V at I_F = 5.0 A and t_rr = 0.6 µs under specified conditions.

It operates within a channel temperature range of –55°C to +150°C and features a thermal resistance R_th(ch–C) of 1.67°C/W. Avalanche testing is defined with V_DD = 150 V, R_G = 25 Ω, and gate transition from 20 V to 0 V at T_ch = 25°C - confirming ruggedness for inductive load turn-off transients.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	500 V - Withstands up to 500 V drain-source blocking voltage, suitable for universal-input offline converters.
R_DS(on) max	1.5 Ω @ V_GS = 10 V, I_D = 2.5 A - Enables low conduction loss in 5 A-class switching nodes.
Q_G	13 nC @ V_DD = 400 V - Reduces gate drive power and switching losses in high-frequency SMPS designs.
E_AS	125 mJ - Provides verified single-pulse avalanche energy margin for unclamped inductive switching events.
t_r/t_f	3 ns / 5.5 ns @ V_DD = 150 V, R_G = 10 Ω - Supports clean, fast transitions minimizing overlap loss in hard-switched topologies.
T_ch max	150°C - Allows reliable operation in thermally constrained enclosures with appropriate heatsinking.

Pinout & Package

2SK3305-S-AZ uses the TO-262 (IPAK) package with three leads and an exposed drain-fin tab for thermal and electrical connection. Pin 1 is Gate, Pin 2 is Drain (connected to fin), Pin 3 is Source.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control terminal	Receives voltage-controlled signal to modulate channel conductivity; requires ESD-safe handling due to thin gate oxide.
2 (Drain)	High-side power node	Electrically and thermally connected to metal fin; must be isolated from other potentials and mounted to heatsink.
3 (Source)	Reference node for gate drive	Serves as return path for load current and reference for V_GS; common connection point for source resistor and driver ground.

Key Features

Feature	Design Value
Low gate charge	Q_G = 13 nC enables efficient 100–300 kHz switching without excessive driver dissipation.
High avalanche ruggedness	E_AS = 125 mJ allows safe operation during transient overloads without external snubbers in many flyback designs.
Stable R_DS(on) vs. temperature	R_DS(on) increases only ~2× from 25°C to 125°C - simplifies thermal derating in continuous conduction mode.
Fast switching times	t_d(on) = 16 ns, t_f = 5.5 ns minimize dead-time losses and improve efficiency in synchronous or quasi-resonant topologies.

Applications

AC Adapter Primary Switch	Flyback Converter Main Switch
Use Scenario: 30–65 W universal-input AC/DC adapter powering laptops or monitors. IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer via transformer during each PWM cycle. Use Value: Low Q_G and fast t_f reduce switching loss at 65 kHz, while 500 V rating ensures margin across 265 VAC line peaks.	Use Scenario: Isolated DC/DC supply in industrial PLC power modules. IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback delivering regulated 12 V/2 A output. Use Value: 125 mJ E_AS withstands leakage inductance spikes without clamping, improving reliability in variable-load environments.
Offline LED Driver Switch	DC-DC Boost Pre-regulator
Use Scenario: Constant-current LED driver for street lighting operating directly from 230 VAC rectified bus. IC Role / Device Role / Timing Role: High-side switch in buck-boost or SEPIC topology regulating LED string current. Use Value: R_DS(on) ≤ 1.5 Ω limits conduction loss at 350 mA average current, supporting >85% system efficiency.	Use Scenario: Front-end boost stage in telecom power shelf converting –48 VDC to 380 VDC bus. IC Role / Device Role / Timing Role: Power switch in continuous conduction mode (CCM) boost converter. Use Value: Stable \|y_fs\| = 1.0–3.0 S ensures predictable gain and gate drive stability across wide temperature range.

AC Adapter Primary Switch

Flyback Converter Main Switch

Use Scenario: 30–65 W universal-input AC/DC adapter powering laptops or monitors.

IC Role / Device Role / Timing Role: Primary-side high-voltage switch controlling energy transfer via transformer during each PWM cycle.

Use Value: Low Q_G and fast t_f reduce switching loss at 65 kHz, while 500 V rating ensures margin across 265 VAC line peaks.

Use Scenario: Isolated DC/DC supply in industrial PLC power modules.

IC Role / Device Role / Timing Role: Main power switch in discontinuous conduction mode (DCM) flyback delivering regulated 12 V/2 A output.

Use Value: 125 mJ E_AS withstands leakage inductance spikes without clamping, improving reliability in variable-load environments.

Offline LED Driver Switch

DC-DC Boost Pre-regulator

Use Scenario: Constant-current LED driver for street lighting operating directly from 230 VAC rectified bus.

IC Role / Device Role / Timing Role: High-side switch in buck-boost or SEPIC topology regulating LED string current.

Use Value: R_DS(on) ≤ 1.5 Ω limits conduction loss at 350 mA average current, supporting >85% system efficiency.

Use Scenario: Front-end boost stage in telecom power shelf converting –48 VDC to 380 VDC bus.

IC Role / Device Role / Timing Role: Power switch in continuous conduction mode (CCM) boost converter.

Use Value: Stable |y_fs| = 1.0–3.0 S ensures predictable gain and gate drive stability across wide temperature range.

Equivalent & Alternatives

The following parts are listed as comparable options for similar N-channel high-voltage power MOSFET applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP5NK50ZFP	500 V, R_DS(on) = 1.4 Ω, Q_G = 12 nC, TO-220FP package	Lower R_DS(on) but no official avalanche rating; requires external snubber in unclamped inductive circuits	Prefer when board space permits TO-220FP and avalanche stress is mitigated by layout or control.
IXTP50N10P	100 V, R_DS(on) = 0.022 Ω, Q_G = 45 nC, TO-220 package	Lower voltage rating; unsuitable for direct 500 V replacement but offers lower conduction loss in low-V_IN DC-DC stages	Select only for sub-150 V DC input applications where ultra-low R_DS(on) outweighs voltage limitation.

Compared with STP5NK50ZFP and IXTP50N10P, the 2SK3305-S-AZ uniquely balances 500 V capability, certified avalanche energy, and moderate gate charge - making it a purpose-fit choice for cost-sensitive, thermally constrained offline SMPS where reliability under transient overload is non-negotiable.

Availability

2SK3305-S-AZ is available at Aetrix Electronics and suitable for AC adapters, flyback converters, offline LED drivers, and DC-DC boost pre-regulators requiring stable component supply and long-term industrial availability.

Supply support for 2SK3305-S-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 formed in 2010 through the merger of NEC Electronics and Renesas Technology, specializing in microcontrollers, analog, power, and timing solutions.

The 2SK3305-S-AZ belongs to Renesas' legacy high-voltage discrete MOSFET product line, engineered specifically for rugged, cost-effective switching in consumer and industrial AC/DC power conversion systems.

FAQ

What is the maximum continuous drain current rating for the 2SK3305-S-AZ?

The 2SK3305-S-AZ has a maximum continuous drain current I_D(DC) of ±5 A at T_C = 25°C. This rating assumes proper heatsinking - derating applies above 25°C case temperature per the datasheet's PT vs. T_C curve. At T_C = 100°C, usable I_D(DC) drops to approximately 2.5 A. Always verify thermal design using R_th(ch–C) = 1.67°C/W and actual board-level thermal resistance.

Does the 2SK3305-S-AZ have a fully rated avalanche capability?

Yes, the 2SK3305-S-AZ is characterized for single-pulse avalanche with I_AS = 5.0 A and E_AS = 125 mJ under defined test conditions (V_DD = 150 V, R_G = 25 Ω, starting T_ch = 25°C). This is not repetitive avalanche rating - repeated exposure beyond datasheet limits may degrade performance. Use only in applications where energy per event remains within 125 mJ.

What is the gate threshold voltage range for the 2SK3305-S-AZ?

The gate threshold voltage V_GS(off) for the 2SK3305-S-AZ is specified as 2.5 V minimum to 3.5 V maximum at V_DS = 10 V and I_D = 1 mA. This means the device begins conducting significantly between 2.5 V and 3.5 V, and full enhancement (R_DS(on) spec met) requires V_GS ≥ 10 V. Avoid biasing near threshold in switching applications to prevent linear-mode heating.

Can the 2SK3305-S-AZ be used in place of the 2SK3305 in a TO-220AB design?

No - the 2SK3305-S-AZ uses TO-262 (IPAK) packaging, which has different mechanical dimensions, lead spacing, and thermal mounting than TO-220AB. While electrically identical to the base 2SK3305, the 2SK3305-S-AZ requires PCB footprint and heatsink interface redesign. It is not a drop-in replacement; layout changes are mandatory for mechanical and thermal integrity.

Is the 2SK3305-S-AZ RoHS compliant?

Yes, the 2SK3305-S-AZ conforms to EU RoHS Directive requirements. Renesas Electronics confirms RoHS compliance for this part in its official documentation and material declarations. No lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed allowable thresholds. Full compliance documentation is available upon request from Aetrix Electronics or Renesas.

2SK3305-S-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:: -

2SK3305-S-AZ FAQ

1.How can I place an order for 2SK3305-S-AZ through Aetrix?

Please submit a Request for Quotation (RFQ) for 2SK3305-S-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 2SK3305-S-AZ reliable?

The price and inventory of 2SK3305-S-AZ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 2SK3305-S-AZ is usually 5 days.

3.What payment methods are accepted for 2SK3305-S-AZ?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 2SK3305-S-AZ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 2SK3305-S-AZ?

2SK3305-S-AZ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 2SK3305-S-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 2SK3305-S-AZ?

For technical support, including 2SK3305-S-AZ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 2SK3305-S-AZ requirements.

6.How does Aetrix verify that 2SK3305-S-AZ is sourced from the original manufacturer or authorized distributors?

All 2SK3305-S-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 2SK3305-S-AZ meets industry standards.

7.What is the process for return or replacement of 2SK3305-S-AZ?

All 2SK3305-S-AZ units undergo pre-shipment inspection (PSI). If there is an issue with 2SK3305-S-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 2SK3305-S-AZ part is unused and in its original packaging.

Return procedure for 2SK3305-S-AZ:

1.Submit a request within 90 days.

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

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