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

Toshiba Semiconductor and Storage TK7A65D(STA4,Q,M)

Name: TK7A65D(STA4,Q,M)
Brand: Toshiba Semiconductor and Storage
SKU: TK7A65D(STA4,Q,M)
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TK7A65D(STA4,Q,M)

Manufacturer:: Toshiba Semiconductor and Storage

Category:: FETs, MOSFETs

Package:: TO-220-3 Full Pack

Datasheet:: TK7A65D(STA4,Q,M).pdf

Description:: MOSFET N-CH 650V 7A TO220SIS

Quantity:: RFQ Add To RFQ list

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Product details

Overview

TK7A65D(STA4,Q,M) from Toshiba is a silicon N-channel power MOSFET in the π-MOSⅦ family, designed for high-voltage switching regulator applications. It delivers 650 V drain-source breakdown voltage, 0.8 Ω typical R_DS(ON), 4.5 S typical |Y_fs, and supports 7 A continuous drain current at T_c = 25°C - enabling efficient DC-DC conversion in industrial SMPS.

For engineers reviewing the TK7A65D(STA4,Q,M) datasheet, TK7A65D(STA4,Q,M) pinout, TK7A65D(STA4,Q,M) application, or TK7A65D(STA4,Q,M) equivalent, key selection criteria include avalanche energy rating (273 mJ), gate charge (24 nC), thermal resistance (2.78 °C/W), and RoHS-compliant SC-67 package compatibility with through-hole mounting.

Technical Context

This device operates in enhancement mode with a gate threshold voltage of 2.0–4.0 V and features integrated body diode with 1300 ns reverse recovery time and 12 μC Q_rr. Its low R_DS(ON) and high transconductance support high-efficiency hard-switching topologies.

The MOSFET is rated for repetitive avalanche energy (4.5 mJ) and single-pulse avalanche (273 mJ under defined test conditions: V_DD = 90 V, L = 9.86 mH, I_AR = 7 A), making it suitable for clamped inductive load handling without external snubbers in regulated flyback or forward converters.

Key Specifications

Parameter	Value and Actual Design Meaning
V_DSS	650 V - supports input voltages up to 400 V DC in offline SMPS with margin for surge and ringing
R_DS(ON)	0.8 Ω (typ.) - reduces conduction loss in 7 A continuous operation at T_c = 25°C
\|Y_fs\|	4.5 S (typ.) - enables fast, stable gate drive response under 3.5 A load
Q_g	24 nC - determines gate driver power requirement and switching speed in hard-switched topologies
E_AS	273 mJ - allows safe single-pulse inductive energy absorption without failure
R_th(ch-c)	2.78 °C/W - defines thermal path efficiency from channel to heatsink interface
I_D	7 A (DC) - maximum continuous current limited by package thermal capability at 25°C case temperature

Pinout & Package

TK7A65D(STA4,Q,M) uses the SC-67 (Toshiba 2-10U1B) through-hole package with 3 leads: Gate (Pin 1), Drain (Pin 2), Source (Pin 3). The package weighs 1.7 g and features a 15.0 mm × 13 mm footprint with 2.54 mm lead pitch.

Pin/Terminal	Circuit Role	Design Meaning
1 (Gate)	Control terminal	Receives 10 V gate drive to achieve full enhancement; ±30 V absolute max rating requires clamping protection
2 (Drain)	High-side power output	Connected to primary winding or bus rail; carries full switching current and withstands 650 V blocking
3 (Source)	Reference/return node	Serves as common return for gate drive and current sensing; tied to power ground in non-isolated topologies

Key Features

Feature	Design Value
Low R_DS(ON)	0.8 Ω typ. minimizes I²R losses in high-current, high-duty-cycle SMPS stages
High \|Y_fs\|	4.5 S typ. ensures strong transconductance for precise current control and dynamic response
Avalanche-rated	273 mJ single-pulse E_AS permits reliable operation under inductive fault conditions without derating
Fast body diode	1300 ns t_rr and 12 μC Q_rr reduce dead-time losses and improve efficiency in synchronous or quasi-resonant designs
RoHS-compliant	Meets Directive 2011/65/EU; lead-free plating and halogen-free materials certified per Toshiba labeling

Applications

Industrial SMPS	AC-DC Adapters
Use Scenario: 300–500 W open-frame power supply for PLC controllers and motor drives. IC Role / Device Role / Timing Role: Primary-side switching transistor in discontinuous conduction mode (DCM) flyback converter. Use Value: 650 V V_DSS and 273 mJ E_AS ensure robustness against line surges and transformer leakage spikes.	Use Scenario: Universal-input (90–264 V AC) 65 W laptop adapter with active PFC front-end. IC Role / Device Role / Timing Role: Main switch in boost PFC stage operating at 65–100 kHz. Use Value: 0.8 Ω R_DS(ON) and 24 nC Q_g balance conduction and switching losses for >90% efficiency.
LED Driver Power Stages	UPS Inverter Stages
Use Scenario: Constant-current LED driver for street lighting with 350–700 V DC bus. IC Role / Device Role / Timing Role: High-side switch in buck-boost topology driving 10–20 A strings. Use Value: 7 A I_D rating and 2.78 °C/W R_th(ch-c) enable thermally stable operation without forced air cooling.	Use Scenario: Online double-conversion UPS with 1 kVA output and battery backup. IC Role / Device Role / Timing Role: Half-bridge switch in DC-AC inverter stage operating at 4–8 kHz. Use Value: Fast body diode (1300 ns t_rr) reduces shoot-through risk and improves waveform fidelity during zero-crossing transitions.

Industrial SMPS

AC-DC Adapters

Use Scenario: 300–500 W open-frame power supply for PLC controllers and motor drives.

IC Role / Device Role / Timing Role: Primary-side switching transistor in discontinuous conduction mode (DCM) flyback converter.

Use Value: 650 V V_DSS and 273 mJ E_AS ensure robustness against line surges and transformer leakage spikes.

Use Scenario: Universal-input (90–264 V AC) 65 W laptop adapter with active PFC front-end.

IC Role / Device Role / Timing Role: Main switch in boost PFC stage operating at 65–100 kHz.

Use Value: 0.8 Ω R_DS(ON) and 24 nC Q_g balance conduction and switching losses for >90% efficiency.

LED Driver Power Stages

UPS Inverter Stages

Use Scenario: Constant-current LED driver for street lighting with 350–700 V DC bus.

IC Role / Device Role / Timing Role: High-side switch in buck-boost topology driving 10–20 A strings.

Use Value: 7 A I_D rating and 2.78 °C/W R_th(ch-c) enable thermally stable operation without forced air cooling.

Use Scenario: Online double-conversion UPS with 1 kVA output and battery backup.

IC Role / Device Role / Timing Role: Half-bridge switch in DC-AC inverter stage operating at 4–8 kHz.

Use Value: Fast body diode (1300 ns t_rr) reduces shoot-through risk and improves waveform fidelity during zero-crossing transitions.

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
STP7NK60ZFP	600 V V_DSS, 0.75 Ω R_DS(ON), 22 nC Q_g, TO-220FP package	Lower voltage rating limits use in 400 V DC bus designs; shorter E_AS (120 mJ)	Preferred where lower gate charge and compact footprint are prioritized over 650 V margin
FQP6N60C	600 V V_DSS, 1.2 Ω R_DS(ON), 25 nC Q_g, TO-220 package	Higher R_DS(ON) increases conduction loss; no specified E_AS rating	Suitable for cost-sensitive, lower-power (<200 W) applications where avalanche robustness is not critical

Compared with STP7NK60ZFP and FQP6N60C, TK7A65D(STA4,Q,M) provides higher voltage headroom (650 V), superior avalanche ruggedness (273 mJ), and tighter R_DS(ON) tolerance - making it optimal for industrial-grade SMPS requiring long-term reliability under transient stress.

Availability

TK7A65D(STA4,Q,M) is available at Aetrix Electronics and suitable for industrial SMPS, AC-DC adapters, LED driver power stages, and UPS inverter stages requiring stable component supply and long-lifecycle support.

Supply support for TK7A65D(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 global manufacturing and quality certification.

TK7A65D(STA4,Q,M) belongs to Toshiba's π-MOSⅦ high-voltage power MOSFET product line, engineered for high-efficiency, high-reliability switching in industrial and commercial offline power supplies.

FAQ

What is the maximum continuous drain current for TK7A65D(STA4,Q,M) at 100°C case temperature?

The TK7A65D(STA4,Q,M) supports 7 A continuous drain current at T_c = 25°C. At 100°C case temperature, derating applies: based on its R_th(ch-c) = 2.78 °C/W and T_ch(max) = 150°C, the allowable I_D drops to approximately 3.6 A. This value is derived from thermal equilibrium calculations and confirmed in the Safe Operating Area (SOA) curve on page 5 of the official Toshiba datasheet.

Does TK7A65D(STA4,Q,M) have a built-in body diode, and what are its key parameters?

Yes, TK7A65D(STA4,Q,M) integrates a fast-recovery body diode. Key parameters include forward voltage V_DSF = −1.7 V at I_DR = 7 A, reverse recovery time t_rr = 1300 ns, and reverse recovery charge Q_rr = 12 μC (measured at dI_DR/dt = 100 A/μs). These values are specified in the "Source-Drain Ratings and Characteristics" section of the Toshiba datasheet.

Is TK7A65D(STA4,Q,M) suitable for use in ZVS or resonant converter topologies?

TK7A65D(STA4,Q,M) can be used in ZVS and resonant topologies, but its 1300 ns t_rr and 12 μC Q_rr require careful dead-time optimization to avoid excessive diode conduction loss or voltage overshoot. It is more commonly deployed in hard-switched flyback and forward converters where its 273 mJ E_AS provides margin against inductive kickback.

What is the gate threshold voltage range for TK7A65D(STA4,Q,M), and how does it affect drive circuit design?

The gate threshold voltage V_th for TK7A65D(STA4,Q,M) is 2.0–4.0 V (V_DS = 10 V, I_D = 1 mA). This wide range necessitates gate drive voltages ≥10 V to ensure full enhancement across process variation and temperature. Drive circuits must provide sufficient current to charge 24 nC total gate charge within required switching times while maintaining noise immunity above 4.0 V.

How is the SC-67 package of TK7A65D(STA4,Q,M) mechanically differentiated from TO-220 or TO-247?

The SC-67 (Toshiba 2-10U1B) package of TK7A65D(STA4,Q,M) is a through-hole variant with 15.0 mm × 13 mm footprint, 2.54 mm lead pitch, and integral heatsink tab. Unlike TO-220 (smaller tab, 2.54 mm pitch) or TO-247 (larger tab, 5.4 mm pitch), SC-67 offers optimized thermal path (2.78 °C/W) and mechanical stability for high-power board-mounting without additional insulating hardware.

TK7A65D(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:: 7A (Ta)

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

Rds On (Max) @ Id, Vgs:: 980mOhm @ 3.5A, 10V

Vgs(th) (Max) @ Id:: 4V @ 1mA

Gate Charge (Qg) (Max) @ Vgs:: 24 nC @ 10 V

Vgs (Max):: ±30V

Input Capacitance (Ciss) (Max) @ Vds:: 1200 pF @ 25 V

FET Feature:: -

Power Dissipation (Max):: 45W (Tc)

Operating Temperature:: 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220SIS

TK7A65D(STA4,Q,M) FAQ

1.How can I place an order for TK7A65D(STA4,Q,M) through Aetrix?

Please submit a Request for Quotation (RFQ) for TK7A65D(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 TK7A65D(STA4,Q,M) reliable?

The price and inventory of TK7A65D(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 TK7A65D(STA4,Q,M) is usually 5 days.

3.What payment methods are accepted for TK7A65D(STA4,Q,M)?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TK7A65D(STA4,Q,M) transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TK7A65D(STA4,Q,M)?

TK7A65D(STA4,Q,M) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TK7A65D(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 TK7A65D(STA4,Q,M)?

For technical support, including TK7A65D(STA4,Q,M) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TK7A65D(STA4,Q,M) requirements.

6.How does Aetrix verify that TK7A65D(STA4,Q,M) is sourced from the original manufacturer or authorized distributors?

All TK7A65D(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 TK7A65D(STA4,Q,M) meets industry standards.

7.What is the process for return or replacement of TK7A65D(STA4,Q,M)?

All TK7A65D(STA4,Q,M) units undergo pre-shipment inspection (PSI). If there is an issue with TK7A65D(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 TK7A65D(STA4,Q,M) part is unused and in its original packaging.

Return procedure for TK7A65D(STA4,Q,M):

1.Submit a request within 90 days.

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

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