STMicroelectronics STPS20M60CT

Overview

STPS20M60CT from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 60 V repetitive peak reverse voltage and 2 × 10 A average forward current per diode at T_c = 140 °C. It delivers low 0.370 V typical forward voltage at 125 °C and 10 A, enabling high-efficiency operation in AC/DC adapters for notebooks and game stations.

For engineers reviewing the STPS20M60CT datasheet, STPS20M60CT pinout, STPS20M60CT application, or STPS20M60CT equivalent, key selection criteria include avalanche energy rating (13.6 kW pulse), thermal resistance (1.5 °C/W junction-to-case per diode), and dual-diode conduction loss modeling (P = 0.375 × I_F(AV) + 0.0135 × I_F(RMS)²).

Technical Context

This dual Schottky rectifier integrates two independent anode terminals (A1, A2) sharing a single cathode (K), enabling synchronous or interleaved rectification topologies. Its low V_F and absence of minority-carrier storage support high-frequency switching (>100 kHz) without reverse recovery losses.

The device is avalanche-rated with V_ARM = 80 V (t_p < 1 µs, T_j < 150 °C, I_AR < 51 A), and its thermal design requires case-mounted heatsinking to maintain T_j ≤ 150 °C under 20 A total DC load, leveraging R_th(j–c) = 0.85 °C/W (total device).

Key Specifications

Pinout & Package

Packaged in TO-220AB (JEDEC TO-220 variant with insulated tab), the STPS20M60CT features three external terminals: two anodes (A1, A2) and one common cathode (K). The metal tab is electrically connected to the cathode and serves as the primary thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-20CPH06 and MBR2060CT, the STPS20M60CT uniquely combines TO-220AB form factor, 0.370 V low-V_F at operating temperature, and certified avalanche robustness-making it optimal for compact, high-reliability adapter designs where thermal headroom and transient immunity are constrained.

Availability

STPS20M60CT is available at Aetrix Electronics and suitable for notebook AC/DC adapters, game console power supplies, and desktop external PSUs requiring stable component supply, consistent thermal performance, and certified avalanche ruggedness.

Supply support for STPS20M60CT 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STPS20M60CT belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency, high-density AC/DC power conversion where low forward voltage and thermal reliability are critical.

FAQ

What is the maximum junction temperature and how is it enforced?

The absolute maximum junction temperature is 150 °C. This limit is enforced through thermal design: with R_th(j–c) = 0.85 °C/W and typical case temperatures ≤135 °C at 20 A, the junction remains within specification. Exceeding T_c = 140 °C requires active cooling or current derating per Figure 3.

Can STPS20M60CT be used in parallel with another identical device?

No-parallel operation is not recommended. The device uses a common cathode and shared thermal path; paralleling introduces imbalance due to V_F mismatch and uneven thermal coupling. For >20 A, use a single higher-rated part like STPS30M60CG or redesign with interleaved topology.

Is the metal tab electrically isolated in TO-220AB packaging?

No-the metal tab is directly connected to the cathode (K) terminal and is not electrically insulated. A mounting insulator (e.g., mica washer or sil-pad) must be used if the heatsink is grounded or at a different potential than the cathode net.

How does the avalanche rating impact real-world reliability in adapter designs?

The 80 V, 1 µs avalanche rating ensures survival during 1.2/50 µs surge events (e.g., IEC 61000-4-5 Level 3) without degradation. In practice, this eliminates field failures caused by line transients in unregulated AC inputs, reducing need for external MOVs or TVS diodes in Class II adapters.