Toshiba Semiconductor and Storage TK32E12N1,S1X

Overview

TK32E12N1,S1X from Toshiba is a silicon N-channel power MOSFET in U-MOSⅧ-H process, designed as a high-current switching element in DC-DC converters and motor drives. It delivers R_DS(ON) = 11.0 mΩ (typ.) at V_GS = 10 V, supports 120 V drain-source breakdown voltage, and handles 60 A continuous drain current with TO-220 package thermal performance.

For engineers reviewing the TK32E12N1,S1X datasheet, TK32E12N1,S1X pinout, TK32E12N1,S1X application, or TK32E12N1,S1X equivalent, key selection criteria include low conduction loss for high-efficiency 12–48 V industrial power supplies, avalanche ruggedness (E_AS = 48 mJ), and gate charge profile (Q_g = 34 nC) for optimized PWM switching.

Technical Context

This MOSFET employs Toshiba's U-MOSⅧ-H trench-gate structure to achieve low R_DS(ON) while maintaining robust avalanche capability and fast switching dynamics. Its enhancement-mode threshold (V_th = 2.0–4.0 V) ensures reliable turn-on with standard 10 V gate drive, and its integrated body diode exhibits t_rr = 73 ns and Q_rr = 160 nC under specified conditions.

The device is rated for T_ch ≤ 150 °C and features R_th(ch–c) = 1.27 °C/W, enabling high-power operation when mounted on a heatsink. Dynamic parameters-including C_iss = 2000 pF, C_rss = 13 pF, and r_g = 1.9 Ω-support stable gate driving in hard-switched topologies without excessive ringing.

Key Specifications

Pinout & Package

TK32E12N1,S1X is housed in a TO-220 through-hole package (TOSHIBA designation: 2-10X1A), with the drain connected internally to the metal tab for direct heatsink mounting. The case serves as the primary thermal path and electrically connects to the drain terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STP60NF12 and IRF3205PBF, TK32E12N1,S1X offers optimal balance of 120 V rating, 11 mΩ on-resistance, and 34 nC gate charge-making it preferred for high-efficiency, medium-frequency industrial power stages where both voltage headroom and thermal performance are critical.

Availability

TK32E12N1,S1X is available at Aetrix Electronics and suitable for industrial DC-DC converters, brushless DC motor drives, and server voltage regulators requiring stable component supply across multi-year production cycles.

Supply support for TK32E12N1,S1X 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 designs and manufactures discrete semiconductors and power devices, with emphasis on high-reliability industrial and automotive-grade components.

TK32E12N1,S1X belongs to Toshiba's U-MOSⅧ-H power MOSFET family, engineered specifically for high-current, high-efficiency switching in industrial power conversion and motor control systems.

FAQ

What is the maximum continuous drain current rating for TK32E12N1,S1X?

The TK32E12N1,S1X is rated for 60 A DC drain current at T_c = 25 °C with proper heatsinking. Derating applies above 25 °C case temperature per the R_th(ch–c) = 1.27 °C/W thermal resistance curve. At T_c = 100 °C, the usable I_D drops to approximately 32 A to maintain T_ch ≤ 150 °C. This rating assumes adequate PCB copper area and thermal interface material for the TO-220 drain tab.

Does TK32E12N1,S1X support logic-level gate drive?

TK32E12N1,S1X has a gate threshold voltage range of 2.0–4.0 V, but it is not a true logic-level MOSFET. To achieve its specified R_DS(ON) = 11.0 mΩ (typ.), a V_GS of 10 V is required. While it will turn on with 3.3 V or 5 V gate signals, R_DS(ON) rises significantly-exceeding 40 mΩ at V_GS = 5 V-so external gate boosting or level-shifting is recommended for full-performance operation.

What is the significance of the "S1X" suffix in TK32E12N1,S1X?

The "S1X" suffix in TK32E12N1,S1X denotes Toshiba's standard tape-and-reel packaging variant for surface-mount compatible automated assembly, though the device itself remains a through-hole TO-220 part. It indicates compliance with JEDEC J-STD-020 moisture sensitivity level (MSL) requirements and includes standardized reel quantity, orientation, and labeling per Toshiba's ordering conventions-not a functional or electrical variant.

Can TK32E12N1,S1X replace older U-MOS VI or VII devices in existing designs?

Yes, TK32E12N1,S1X is a direct drop-in replacement for earlier Toshiba U-MOS VI and VII equivalents such as TK31E12N1 in identical TO-220 packages. It maintains identical pinout, absolute maximum ratings, and thermal footprint, while offering improved R_DS(ON), lower gate charge, and enhanced avalanche ruggedness-enabling efficiency gains without layout changes.

Is the body diode in TK32E12N1,S1X suitable for synchronous rectification?

The body diode in TK32E12N1,S1X has t_rr = 73 ns and Q_rr = 160 nC under specified test conditions (I_DR = 32 A, dI/dt = 100 A/µs). While usable in non-critical synchronous rectification, its recovery characteristics are less optimized than dedicated sync-FETs. For high-frequency (>300 kHz) or high-efficiency designs, pairing with an external Schottky or using a dedicated low-Q_rr MOSFET is recommended-but TK32E12N1,S1X remains viable in 100–200 kHz industrial converters.