STMicroelectronics STPS10M80CT

Overview

STPS10M80CT from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-220AB package, rated for 80 V repetitive peak reverse voltage and 2 × 5 A average forward current per diode at Tc = 160 °C. It delivers low forward voltage drop (0.465 V typ. at 2.5 A, 125 °C) and low leakage current (20 µA max. at 25 °C, 80 V), enabling high-efficiency operation in AC/DC adapters for notebooks and LCD TVs.

For engineers reviewing the STPS10M80CT datasheet, STPS10M80CT pinout, STPS10M80CT application, or STPS10M80CT equivalent, this device requires attention to thermal derating in dual-diode conduction, avalanche energy limits (4000 W peak, 1 µs), insulated mounting considerations for TO-220FPAB variants, and junction-to-case thermal resistance (3.10 °C/W per diode) when designing heatsink interfaces.

Technical Context

This dual Schottky rectifier integrates two independent anodes sharing one cathode terminal, enabling synchronous or interleaved rectification topologies. Its silicon design emphasizes low VF–IR trade-off, with specified avalanche capability (100 V repetitive peak, tp < 1 µs) and 175 °C maximum junction temperature - critical for compact, high-power-density adapter designs.

The TO-220AB package provides direct metal tab thermal conduction, while the insulated TO-220FPAB variant (STPS10M80CFP) offers 2000 V isolation and 45 pF capacitance - both validated for use in secondary-side rectification where safety isolation or EMI control is required.

Key Specifications

Pinout & Package

STPS10M80CT uses the TO-220AB package with isolated metal tab (non-insulated). The device has three terminals: two anodes (A1, A2) and one shared cathode (K), arranged in a straight-line configuration with the tab electrically connected to the cathode.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS10M80CT, STPS10L80CT trades higher leakage for lower VF to improve full-load efficiency, while SS10M80CT offers lower cost but requires thermal redesign due to its 0.55 V VF - making STPS10M80CT the balanced choice for thermally constrained, efficiency-critical adapter designs.

Availability

STPS10M80CT is available at Aetrix Electronics and suitable for notebook adapters, LCD TV power supplies, game console chargers, and desktop external PSUs requiring stable component supply and long-term industrial availability.

Supply support for STPS10M80CT 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, specializing in power management, analog, microcontrollers, and automotive ICs.

STPS10M80CT belongs to ST's high-efficiency Schottky rectifier product line, engineered specifically for high-frequency switch-mode power supplies in consumer electronics where thermal density and efficiency are critical.

FAQ

Is STPS10M80CT RoHS compliant and halogen-free?

Yes. STPS10M80CT 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.

Can STPS10M80CT be used in parallel with another unit for higher current?

No. Parallel operation is not recommended due to mismatched forward voltage characteristics between units, which causes current imbalance and potential thermal runaway. For >10 A total current, use a single higher-rated device or redesign with interleaved topology using separate windings.

What is the maximum recommended torque for the mounting screw?

The recommended mechanical mounting torque for the TO-220AB tab is 0.4–0.6 N·m. Exceeding 0.6 N·m risks cracking the package or damaging internal wire bonds; insufficient torque (>0.4 N·m) degrades thermal interface performance and raises junction temperature beyond rated limits.

Does STPS10M80CT require a heatsink in all applications?

Yes - even at 5 A per diode, junction temperature exceeds 125 °C without heatsinking. With Rth(j-c) = 3.10 °C/W and ambient at 50 °C, a minimum heatsink thermal resistance of ≤ 6.2 °C/W is required to maintain Tj ≤ 175 °C. Board copper area alone is insufficient for continuous operation.