Toshiba Semiconductor and Storage TK20A60W,S5VX

Overview

TK20A60W from Toshiba Electronic Devices & Storage Corporation is a silicon N-channel super-junction MOSFET designed for high-voltage switching in offline power supplies. It delivers 600 V V_DSS, 20 A continuous drain current, and low R_DS(ON) of 0.13 Ω (typ.) at V_GS = 10 V, enabling efficient operation in AC-DC adapters and industrial SMPS.

For engineers reviewing the TK20A60W datasheet, TK20A60W pinout, TK20A60W application, or TK20A60W equivalent, key selection criteria include avalanche ruggedness (E_AS = 300 mJ), gate threshold voltage range (2.7–3.7 V), thermal resistance (R_th(ch-c) = 2.78 °C/W), and TO-220SIS package compatibility with heatsink mounting.

Technical Context

This device implements Toshiba's DTMOS™ IV super-junction architecture to achieve high breakdown voltage with low conduction loss. Its enhancement-mode operation and gate threshold voltage (V_th) of 2.7–3.7 V ensure reliable turn-on with standard 3.3 V or 5 V logic-level drivers.

The TK20A60W integrates an intrinsic body diode with reverse recovery time (t_rr) of 330 ns (typ.) and Q_rr of 2.9 µC, supporting hard-switched PFC and flyback topologies. Its dv/dt ruggedness exceeds 50 V/ns, enhancing noise immunity in high-frequency switching environments.

Key Specifications

Pinout & Package

TK20A60W is housed in a TO-220SIS (JEITA SC-67) package with isolated tab, enabling direct heatsink mounting without insulating hardware. The package weighs 1.7 g and features creepage/clearance optimized for 2000 V_RMS isolation rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage switching applications.

Compared with STP20NM60FD and IPP60R190C7, the TK20A60W offers superior thermal interface simplicity via its isolated TO-220SIS package and higher single-pulse avalanche energy, making it preferred for cost-sensitive industrial power supplies requiring field-proven ruggedness without added isolation hardware.

Availability

TK20A60W is available at Aetrix Electronics and suitable for AC-DC power adapters, industrial SMPS, LED driver power supplies, and motor drive inverters requiring stable component supply and long-term lifecycle support.

Supply support for TK20A60W 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 storage solutions, with decades of expertise in discrete power semiconductors.

The TK20A60W belongs to Toshiba's DTMOS™ IV super-junction MOSFET product line, engineered specifically for high-efficiency, high-reliability offline power conversion in industrial and consumer applications.

FAQ

What is the maximum continuous drain current rating for the TK20A60W?

The TK20A60W has a maximum continuous drain current (I_D) rating of 20 A at T_c = 25 °C. This rating assumes proper heatsinking and derating per the datasheet's thermal curves - at T_c = 100 °C, the usable I_D drops to approximately 12 A. Designers must verify channel temperature remains ≤150 °C under worst-case operating conditions using R_th(ch-c) = 2.78 °C/W.

Does the TK20A60W have an isolated package, and what is its isolation voltage rating?

Yes, the TK20A60W uses the TO-220SIS package with electrically isolated drain tab. Its isolation voltage rating is 2000 V_RMS, verified per safety standards. This eliminates the need for insulating pads or washers when mounting directly to a grounded heatsink - a key advantage over standard TO-220 variants in high-voltage industrial power supplies.

What is the typical gate threshold voltage (V_th) range for the TK20A60W, and how does it affect drive requirements?

The TK20A60W has a gate threshold voltage (V_th) range of 2.7–3.7 V (measured at V_DS = 10 V, I_D = 1 mA). This ensures reliable turn-on with standard 3.3 V or 5 V logic-level gate drivers. However, full enhancement (low R_DS(ON)) requires V_GS ≥ 10 V - so gate drive circuits must deliver ≥10 V to achieve the specified 0.13 Ω on-resistance.

Can the TK20A60W be used in avalanche mode, and what is its single-pulse avalanche energy rating?

Yes, the TK20A60W is fully rated for repetitive and single-pulse avalanche operation. Its guaranteed single-pulse avalanche energy (E_AS) is 300 mJ under standardized test conditions (V_DD = 90 V, I_AR = 5 A, L = 21 mH). This specification enables robust operation in flyback and LLC converters where voltage spikes exceed V_DSS, reducing reliance on external clamping components.

What are the key thermal parameters of the TK20A60W, and how do they impact PCB layout?

The TK20A60W has R_th(ch-c) = 2.78 °C/W (channel-to-case) and R_th(ch-a) = 62.5 °C/W (channel-to-ambient). For reliable operation, the case temperature must be controlled via a thermally optimized copper pour and heatsink. PCB layout must allocate ≥200 mm² of 2-oz copper connected to Pin 2 (Drain) with multiple thermal vias to inner ground planes - insufficient copper area will cause thermal runaway even within absolute maximum ratings.