STMicroelectronics STPS30M80CT

Overview

STPS30M80CT from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 80 V repetitive peak reverse voltage and 2 × 15 A average forward current per diode at Tc = 155 °C. It delivers low forward voltage drop (0.570 V typ. @ 7.5 A, 25 °C) and low leakage current (8 µA max. @ 80 V, 25 °C), enabling high-efficiency operation in AC/DC adapters for notebooks and LCD TVs.

For engineers reviewing the STPS30M80CT datasheet, STPS30M80CT pinout, STPS30M80CT application, or STPS30M80CT equivalent, key selection criteria include junction-to-case thermal resistance (1.60 °C/W per diode), avalanche capability (100 V peak, 9500 W pulse), insulated package variant availability (TO-220FPAB), and dual-diode conduction loss modeling using P = 0.455 × IF(AV) + 0.0113 × IF²(RMS).

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode terminal, optimized for synchronous rectification and output stage freewheeling in high-frequency SMPS topologies. Its design emphasizes thermal robustness (Tj(max) = 175 °C) and controlled trade-off between VF and IR across temperature - VF drops to 0.490 V typ. at 125 °C while IR remains ≤25 mA at same condition.

The TO-220AB package enables direct heatsink mounting with mechanical torque specification (0.4–0.6 N·m) and provides 1.60 °C/W junction-to-case thermal resistance per diode. Avalanche energy validation per AN1768 and AN2025 confirms ruggedness under transient overvoltage events up to 100 V with IAR < 28.2 A and tp < 1 µs.

Key Specifications

Pinout & Package

STPS30M80CT uses the TO-220AB package: insulated plastic body with metal tab (cathode-connected), three leads (A1, A2, K), and screw-mount compatible footprint. Thermal interface requires conductive grease and torque-controlled fastening (0.4–0.6 N·m).

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-30CPQ060 and MBR3080CT, STPS30M80CT offers the optimal balance of 80 V rating, 0.570 V low VF, 40 µA IR ceiling, and validated avalanche ruggedness - making it preferred for high-density, thermally constrained 12–19 V adapter platforms requiring long-term reliability.

Availability

STPS30M80CT is available at Aetrix Electronics and suitable for notebook adapters, LCD TV power supplies, game console modules, and desktop PC VRMs requiring stable component supply, consistent parametric performance, and long-lifecycle support.

Supply support for STPS30M80CT 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 silicon solutions for automotive, industrial, and consumer markets with emphasis on power efficiency and system integration.

STPS30M80CT belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-frequency switch-mode power conversion where low forward voltage, thermal resilience, and avalanche robustness are critical in compact AC/DC and DC/DC applications.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STPS30M80CT supports continuous operation with case temperature up to 155 °C for each diode when delivering 15 A average forward current. This rating assumes proper heatsinking and adherence to the derating curve in Figure 3 of the datasheet. Exceeding 155 °C requires proportional current reduction to maintain junction temperature below 175 °C.

Can STPS30M80CT be used in parallel with another unit for higher current?

No - STPS30M80CT is not characterized for parallel operation due to mismatched forward voltage curves and thermal coupling effects. For higher current, ST recommends using the D2PAK-packaged STPS30M80CG-TR (rated 30 A total) or selecting a single higher-current Schottky like STPS40L80CG, which is designed for scalable thermal management.

Is the metal tab electrically isolated from the cathode terminal?

No - in the TO-220AB package (STPS30M80CT), the metal tab is internally connected to the common cathode (K) terminal. Electrical isolation requires the TO-220FPAB variant (STPS30M80CFP), which provides 2000 V insulation between tab and terminals and is explicitly rated for isolated mounting.

How is avalanche energy validated for this part?

Avalanche capability is validated per ST application notes AN1768 and AN2025 using standardized 1 µs pulse testing at Tj = 25 °C. The device is confirmed to withstand 9500 W peak power (100 V × 28.2 A) without parameter degradation, supporting reliable operation in flyback and forward converters subject to transformer leakage inductance spikes.