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Toshiba Semiconductor and Storage TK5A65DA(STA4,Q,M)

Name: TK5A65DA(STA4,Q,M)
Brand: Toshiba Semiconductor and Storage
SKU: TK5A65DA(STA4,Q,M)
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TK5A65DA(STA4,Q,M)

Manufacturer:: Toshiba Semiconductor and Storage

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: TK5A65DA(STA4,Q,M).pdf

Description:: MOSFET N-CH 650V 4.5A TO220SIS

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Product details

Overview

TK5A65DA(STA4,Q,M) from Toshiba is a silicon N-channel power MOSFET in the π-MOSⅣ family, designed for high-voltage switching in offline AC-DC converters and DC-DC regulators. It delivers 650 V drain-source breakdown voltage, 4.5 A continuous drain current (Tc = 25°C), and low R_DS(ON) of 1.34 Ω (typ.) at V_GS = 10 V, enabling efficient operation in flyback and forward topologies.

For engineers reviewing the TK5A65DA(STA4,Q,M) datasheet, TK5A65DA(STA4,Q,M) pinout, TK5A65DA(STA4,Q,M) application, or TK5A65DA(STA4,Q,M) equivalent, key selection criteria include avalanche ruggedness (E_AS = 194 mJ), gate threshold range (2.4–4.4 V), thermal resistance (R_th(ch-c) = 3.57 °C/W), and TO-220SIS package compatibility with standard heatsinking.

Technical Context

This device operates as an enhancement-mode, normally-off switch with integrated body diode, optimized for hard-switched SMPS applications where unclamped inductive switching is expected. Its 650 V V_DSS, 4.5 A I_D, and 194 mJ single-pulse avalanche energy support robust operation under transient overvoltage conditions without external snubbers.

The π-MOSⅣ process enables low gate charge (Q_g = 16 nC typ.), fast switching (t_r = 20 ns, t_f = 9 ns), and stable R_DS(ON) over temperature - critical for maintaining efficiency across industrial ambient ranges up to 150°C channel temperature.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	650 V - supports universal-input offline SMPS designs without derating
R_DS(ON)	1.34 Ω (typ.) at V_GS = 10 V - reduces conduction loss in 4.5 A continuous applications
I_D (DC)	4.5 A at T_c = 25°C - defines maximum steady-state current with adequate heatsinking
E_AS	194 mJ - enables reliable unclamped inductive switching in flyback transformers
Q_g	16 nC (typ.) - lowers gate drive power and improves switching efficiency at 50–100 kHz
R_th(ch-c)	3.57 °C/W - allows direct mounting to heatsink for thermal management in compact enclosures
V_th	2.4–4.4 V - ensures clean turn-on with standard 5 V or 12 V gate drivers

Pinout & Package

TK5A65DA(STA4,Q,M) uses the TO-220SIS (JEITA SC-67, Toshiba 2-10U1S) package - a 3-lead through-hole variant with isolated drain tab for simplified heatsinking and creepage/clearance compliance in high-voltage designs.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control input	Receives gate drive signal; requires <±1 µA leakage and 10 V nominal bias for full enhancement
2 (Drain)	High-side power terminal	Connected to primary winding or bus rail; electrically isolated from case for safe heatsink mounting
3 (Source)	Power return / reference	Serves as common return path for load current and gate drive reference; ties to PCB ground plane

Key Features

Feature	Design Value
Low R_DS(ON)	1.34 Ω typ. minimizes I²R losses in 4.5 A continuous switching applications
High \|Y_fs\|	3.1 S typ. provides strong transconductance for stable gain and fast response to gate voltage changes
Avalanche-rated	194 mJ single-pulse energy rating eliminates need for external clamping in flyback snubberless designs
Enhancement mode	V_th = 2.4–4.4 V ensures reliable turn-on with industry-standard PWM controllers and gate drivers
Low C_iss	700 pF typical reduces gate drive requirements and EMI generation during switching transitions

Applications

AC-DC Flyback Converters	Industrial DC-DC Regulators
Use Scenario: Primary-side switching in universal-input (85–265 VAC) offline flyback power supplies for LED drivers and auxiliary rails. IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer from primary to secondary via transformer coupling. Use Value: 650 V V_DSS and 194 mJ E_AS enable snubberless operation and reduce component count and board space.	Use Scenario: Step-down regulation in programmable logic controller (PLC) power modules requiring high reliability at 70°C ambient. IC Role / Device Role / Timing Role: Main switching element in isolated forward or half-bridge DC-DC stages delivering 12–24 V outputs. Use Value: R_th(ch-c) = 3.57 °C/W and 150°C max channel temperature support long-term operation without thermal throttling.
Switching Voltage Regulators	UPS Backup Power Stages
Use Scenario: High-efficiency buck-derived topologies in telecom rectifiers and server VRMs operating at 50–100 kHz. IC Role / Device Role / Timing Role: Low-loss synchronous or quasi-resonant switch managing high-current DC bus conversion. Use Value: Q_g = 16 nC and fast t_r/t_f reduce switching losses while maintaining gate drive simplicity.	Use Scenario: Inverter-stage switching in line-interactive UPS systems handling 230 VAC output with battery backup. IC Role / Device Role / Timing Role: Bidirectional or unidirectional high-voltage switch in DC-link or H-bridge configurations. Use Value: IDSS ≤ 10 µA at 650 V ensures minimal standby leakage, preserving battery runtime during idle periods.

AC-DC Flyback Converters

Industrial DC-DC Regulators

Use Scenario: Primary-side switching in universal-input (85–265 VAC) offline flyback power supplies for LED drivers and auxiliary rails.

IC Role / Device Role / Timing Role: High-voltage power switch controlling energy transfer from primary to secondary via transformer coupling.

Use Value: 650 V V_DSS and 194 mJ E_AS enable snubberless operation and reduce component count and board space.

Use Scenario: Step-down regulation in programmable logic controller (PLC) power modules requiring high reliability at 70°C ambient.

IC Role / Device Role / Timing Role: Main switching element in isolated forward or half-bridge DC-DC stages delivering 12–24 V outputs.

Use Value: R_th(ch-c) = 3.57 °C/W and 150°C max channel temperature support long-term operation without thermal throttling.

Switching Voltage Regulators

UPS Backup Power Stages

Use Scenario: High-efficiency buck-derived topologies in telecom rectifiers and server VRMs operating at 50–100 kHz.

IC Role / Device Role / Timing Role: Low-loss synchronous or quasi-resonant switch managing high-current DC bus conversion.

Use Value: Q_g = 16 nC and fast t_r/t_f reduce switching losses while maintaining gate drive simplicity.

Use Scenario: Inverter-stage switching in line-interactive UPS systems handling 230 VAC output with battery backup.

IC Role / Device Role / Timing Role: Bidirectional or unidirectional high-voltage switch in DC-link or H-bridge configurations.

Use Value: IDSS ≤ 10 µA at 650 V ensures minimal standby leakage, preserving battery runtime during idle periods.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STP5NK60ZFP	600 V V_DSS, 4.5 A I_D, R_DS(ON) = 1.4 Ω, Zener-protected gate	Limited to 600 V systems; lower avalanche rating (120 mJ)	Prefer when gate robustness against overvoltage transients is prioritized over 650 V margin
FQP4N60C	600 V V_DSS, 3.8 A I_D, R_DS(ON) = 1.8 Ω, no guaranteed E_AS	Lower current and higher on-resistance; not rated for repetitive avalanche	Select only for cost-sensitive, non-avalanche-critical 600 V applications with conservative derating

Compared with STP5NK60ZFP and FQP4N60C, TK5A65DA(STA4,Q,M) offers superior 650 V rating, higher single-pulse avalanche energy, and tighter R_DS(ON) tolerance - making it preferred for universal-input offline SMPS where voltage margin and ruggedness are design-critical.

Availability

TK5A65DA(STA4,Q,M) is available at Aetrix Electronics and suitable for AC-DC flyback converters, industrial DC-DC regulators, and switching voltage regulators requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.

Supply support for TK5A65DA(STA4,Q,M) 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

Toshiba Electronic Devices & Storage Corporation is a Japanese semiconductor manufacturer specializing in power devices, logic ICs, and memory solutions, with decades of expertise in discrete transistor technology.

TK5A65DA(STA4,Q,M) belongs to Toshiba's π-MOSⅣ high-voltage MOSFET product line, engineered specifically for energy-efficient, high-reliability switching power supplies in industrial and consumer power electronics.

FAQ

What is the maximum drain-source voltage rating for TK5A65DA(STA4,Q,M)?

The TK5A65DA(STA4,Q,M) has a guaranteed drain-source breakdown voltage V_(BR)DSS of 650 V, tested at I_D = 10 mA with V_GS = 0 V. This rating allows use in universal-input offline power supplies without additional voltage derating, provided channel temperature remains within 150°C limits.

Does TK5A65DA(STA4,Q,M) support avalanche operation?

Yes, TK5A65DA(STA4,Q,M) is fully specified for single-pulse avalanche with E_AS = 194 mJ (V_DD = 90 V, T_ch = 25°C, L = 16.9 mH, R_G = 25 Ω, I_AR = 4.5 A). Repetitive avalanche is not rated; designers must ensure energy per switching cycle stays below this limit or implement clamping.

What is the gate threshold voltage range for TK5A65DA(STA4,Q,M)?

The TK5A65DA(STA4,Q,M) exhibits a gate threshold voltage V_th of 2.4 V to 4.4 V, measured at V_DS = 10 V and I_D = 1 mA. This range ensures compatibility with both 5 V and 12 V gate drivers while preventing accidental turn-on from noise or leakage currents.

What package type does TK5A65DA(STA4,Q,M) use, and is the drain electrically isolated?

TK5A65DA(STA4,Q,M) uses the TO-220SIS package (JEITA SC-67), where pin 2 (Drain) is electrically isolated from the metal tab. This isolation enables direct heatsink mounting without insulating hardware, simplifying thermal design and improving safety in high-voltage applications.

Is TK5A65DA(STA4,Q,M) RoHS compliant?

Yes, TK5A65DA(STA4,Q,M) is RoHS compliant per EU Directive 2011/65/EU. The marking indicates [[G]]/RoHS COMPATIBLE or [[G]]/RoHS [[Pb]], and environmental compliance details are confirmed in Toshiba's official product documentation and material declarations.

TK5A65DA(STA4,Q,M) Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: π-MOSVII

Package/Case:: TO-220-3 Full Pack

Packaging:: Tube

Product Status:: Active

FET Type:: N-Channel

Technology:: MOSFET (Metal Oxide)

Drain to Source Voltage (Vdss):: 650 V

Current - Continuous Drain (Id) @ 25°C:: 4.5A (Ta)

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

Rds On (Max) @ Id, Vgs:: 1.67Ohm @ 2.3A, 10V

Vgs(th) (Max) @ Id:: 4.4V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 16 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 700 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 35W (Tc)

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220SIS

TK5A65DA(STA4,Q,M) FAQ

1.How can I place an order for TK5A65DA(STA4,Q,M) through Aetrix?

Please submit a Request for Quotation (RFQ) for TK5A65DA(STA4,Q,M) 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 TK5A65DA(STA4,Q,M) reliable?

The price and inventory of TK5A65DA(STA4,Q,M) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TK5A65DA(STA4,Q,M) is usually 5 days.

3.What payment methods are accepted for TK5A65DA(STA4,Q,M)?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TK5A65DA(STA4,Q,M) transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TK5A65DA(STA4,Q,M)?

TK5A65DA(STA4,Q,M) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TK5A65DA(STA4,Q,M) 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 TK5A65DA(STA4,Q,M)?

For technical support, including TK5A65DA(STA4,Q,M) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TK5A65DA(STA4,Q,M) requirements.

6.How does Aetrix verify that TK5A65DA(STA4,Q,M) is sourced from the original manufacturer or authorized distributors?

All TK5A65DA(STA4,Q,M) 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 TK5A65DA(STA4,Q,M) meets industry standards.

7.What is the process for return or replacement of TK5A65DA(STA4,Q,M)?

All TK5A65DA(STA4,Q,M) units undergo pre-shipment inspection (PSI). If there is an issue with TK5A65DA(STA4,Q,M), 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 TK5A65DA(STA4,Q,M) part is unused and in its original packaging.

Return procedure for TK5A65DA(STA4,Q,M):

1.Submit a request within 90 days.

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

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