STMicroelectronics STPS40M60CT

Overview

STPS40M60CT from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 60 V repetitive reverse voltage and 2 × 20 A average forward current per diode at T_c = 130 °C. It delivers low forward voltage drop (typ. 385 mV at 20 A, 25 °C), low leakage (≤110 µA at 60 V, 25 °C), and avalanche-rated operation (V_ARM = 80 V, t_p < 1 µs), targeting high-efficiency AC/DC adapters for notebooks and desktop PCs.

For engineers reviewing the STPS40M60CT datasheet, STPS40M60CT pinout, STPS40M60CT application, or STPS40M60CT equivalent, key selection criteria include dual-diode thermal coupling behavior, junction-to-case thermal resistance (1.40 °C/W per diode), avalanche energy capability (23 kW peak), and TO-220AB mechanical mounting torque (0.4–0.6 N·m).

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous rectification or dual-output DC/DC conversion. Its low V_F and high-frequency switching capability stem from platinum-silicide barrier technology and optimized epitaxial structure, minimizing conduction and recovery losses.

Thermal performance is defined by per-diode R_th(j–c) = 1.40 °C/W and coupling resistance R_th(c) = 0.50 °C/W, requiring joint thermal modeling when both diodes operate simultaneously. Avalanche rating is validated per AN1768 with I_AR ≤ 86.3 A and P_ARM = 23 kW at T_j = 25 °C, t_p = 1 µs.

Key Specifications

Pinout & Package

TO-220AB package with isolated tab (electrically connected to cathode), 3-terminal configuration: two anodes (A1, A2) and one common cathode (K). Mounting hole accepts M3 screw with 0.4–0.6 N·m torque.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-Schottky rectifier applications.

Compared with VS-40CPH06 and MBR4060CT, STPS40M60CT uniquely combines TO-220AB form factor, sub-400 mV V_F, and certified avalanche ruggedness-enabling smaller heatsinks, higher efficiency, and elimination of external protection components in consumer power adapters.

Availability

STPS40M60CT is available at Aetrix Electronics and suitable for notebook AC/DC adapters, desktop PC power supplies, and gaming console chargers requiring stable component supply across multi-year production cycles.

Supply support for STPS40M60CT 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer markets.

STPS40M60CT belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency switch-mode power supplies where low V_F, thermal coupling control, and avalanche robustness are critical.

FAQ

What is the maximum allowable case temperature for continuous operation?

The datasheet specifies I_F(AV) = 2 × 20 A at T_c = 130 °C, meaning the case must be maintained at or below 130 °C for rated current. Exceeding this requires linear derating per Figure 3; at T_c = 100 °C, max I_F(AV) drops to 2 × 15.5 A. Thermal interface material and heatsink surface flatness directly impact achievable T_c.

Can STPS40M60CT be used in parallel with another identical device?

No-parallel operation is not recommended due to thermal coupling between diodes within the same package and mismatched V_F drift with temperature. For higher current, ST recommends using STPS60M60CT (2 × 30 A) or discrete TO-220 devices with individual thermal paths and current-sharing resistors.

Is the TO-220AB tab electrically isolated from the cathode?

No-the metal tab is internally connected to the common cathode (K) terminal. Electrical isolation requires insulating shoulder washers and non-conductive mounting hardware. The tab serves as the primary thermal path and must be thermally coupled to the heatsink while maintaining electrical continuity to the cathode net.

Does STPS40M60CT meet RoHS and REACH requirements?

Yes-STPS40M60CT is manufactured in ST's ECOPACK®-compliant TO-220AB package, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full compliance documentation, including substance declarations and test reports, is available via ST's quality portal using order code STPS40M60CT.