STMicroelectronics STPS15M80CT

Overview

STPS15M80CT from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 80 V repetitive peak reverse voltage and 2 × 7.5 A average forward current per diode at Tc = 160 °C, with typical forward voltage of 0.445 V at 7.5 A and 125 °C - optimized for high-efficiency AC/DC adapters in notebook and LCD TV power supplies.

For engineers reviewing the STPS15M80CT datasheet, STPS15M80CT pinout, STPS15M80CT application, or STPS15M80CT equivalent, this device requires attention to thermal derating at elevated case temperatures, avalanche energy limits under transient overvoltage, and insulated mounting considerations when evaluating layout compatibility with TO-220FPAB variants.

Technical Context

This dual-diode Schottky rectifier integrates two independent anodes (A1, A2) sharing a common cathode (K), enabling synchronous or interleaved operation in center-tapped or dual-output SMPS topologies. Its low VF–IR trade-off targets efficiency-critical secondary-side rectification where conduction loss dominates at light-to-moderate loads.

Designed for operation up to 175 °C junction temperature, it features specified avalanche capability (100 V, 1 µs pulse), 2.30 °C/W junction-to-case thermal resistance per diode in TO-220AB, and 45 pF package capacitance - critical for EMI control and switching node ringing suppression in >100 kHz converters.

Key Specifications

Pinout & Package

TO-220AB package with insulated mounting flange (no internal isolation barrier; mechanical insulation only). Mounting torque: 0.4–0.6 N·m. Tab is electrically connected to cathode (K).

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-15CTQ080 and MBR1580CT, STPS15M80CT delivers lower forward voltage and verified avalanche robustness - making it preferred for thermally dense, high-reliability adapter designs where efficiency and transient resilience are jointly critical.

Availability

STPS15M80CT is available at Aetrix Electronics and suitable for notebook adapters, LCD TV power supplies, game station external PSUs, and desktop PC auxiliary rails requiring stable component supply and long-term industrial availability.

Supply support for STPS15M80CT 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.

This device belongs to ST's STPS Schottky rectifier product line, engineered specifically for high-frequency switch-mode power supply secondary-side rectification with emphasis on thermal robustness and low-loss performance in space-constrained adapters.

FAQ

Is STPS15M80CT RoHS-compliant and halogen-free?

Yes. STPS15M80CT is manufactured in ST's ECOPACK®-compliant TO-220AB package, meeting RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. The epoxy molding compound complies with UL94 V0 flammability rating.

What is the recommended PCB footprint and thermal pad layout for STPS15M80CT?

Use the TO-220AB mechanical dimensions from Table 5: 16.4 mm L2 length, 5.15 mm G width, and 3.85 mm mounting hole diameter. Provide ≥ 250 mm² copper area (2 oz) under the tab, connected to K via multiple thermal vias (≥ 6 × 0.3 mm) to inner ground planes for optimal Rth(j-a) reduction.

Can STPS15M80CT replace STPS15M80CFP in the same PCB layout?

No. STPS15M80CT (TO-220AB) has non-insulated tab connected to K, while STPS15M80CFP (TO-220FPAB) features 2000 V isolation between tab and K. Mechanical dimensions differ - FPAB has longer L3 (28.6–30.6 mm) and added insulation layer - requiring separate footprint and mounting hardware.

How does the 175 °C maximum junction temperature impact thermal design?

The 175 °C rating allows operation at higher case temperatures than standard 150 °C diodes, enabling 15–20 °C higher heatsink temperature rise before derating. However, Rth(j-c) remains fixed at 2.30 °C/W per diode - so thermal design must still ensure ΔTjc ≤ 150 °C at worst-case load and ambient.