STMicroelectronics STPS30SM80CFP

Overview

STPS30SM80CFP from STMicroelectronics is a dual common-cathode Schottky rectifier in insulated TO-220FPAB package, rated for 80 V repetitive peak reverse voltage and 2 × 15 A average forward current per diode at TC = 105 °C. It delivers low forward voltage drop (0.515 V typ. at 15 A, 125 °C), low leakage (7 mA max at 125 °C, VR = VRRM), and specified avalanche capability (100 V, 22.8 A pulse), enabling high-efficiency operation in AC/DC adapters for notebooks and LCD TVs.

For engineers reviewing the STPS30SM80CFP datasheet, STPS30SM80CFP pinout, STPS30SM80CFP application, or STPS30SM80CFP equivalent, key selection criteria include junction-to-case thermal resistance (5.30 °C/W per diode), insulated 2000 VRMS isolation rating, dual-diode conduction loss modeling (P = 0.520 × IF(AV) + 0.0103 × IF²(RMS)), and compliance with avalanche-safe operating area limits (tp < 1 µs, Tj < 150 °C).

Technical Context

This device implements a dual Schottky barrier structure with common cathode configuration, optimized for high-frequency switching power supplies where low VF and fast recovery are critical. Its thermal design supports simultaneous conduction of both diodes via shared case, with coupling resistance (Rth(c) = 3.10 °C/W) defining cross-heating effects between diodes.

The avalanche-rated architecture enables robust transient handling without external snubbers in flyback or LLC resonant topologies. Static characteristics-including VF temperature coefficient (−1.5 mV/°C), IR exponential rise with Tj, and junction capacitance (≈1000 pF at VR = 30 mV)-are fully characterized across −65 to +175 °C operating range.

Key Specifications

Pinout & Package

Package: TO-220FPAB - Insulated plastic package with 2000 VRMS isolation between leads and metal tab; features epoxy meeting UL 94 V0, 3.0–3.2 mm lead diameter, and 15.9–16.4 mm L6 dimension for mechanical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS30SM80CFP, STPS30H80CT offers lower thermal resistance but sacrifices isolation safety, while VS-30CPH08-M3 trades package size and avalanche robustness for marginally higher VF-making STPS30SM80CFP optimal for insulated, space-constrained, and transient-heavy adapter applications.

Availability

STPS30SM80CFP is available at Aetrix Electronics and suitable for notebook AC/DC adapters, LCD TV power supplies, and game console external PSUs requiring stable component supply, long-lifecycle support, and certified insulation integrity.

Supply support for STPS30SM80CFP 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 automotive, industrial, and consumer markets.

This device belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability AC/DC conversion in compact external power adapters where thermal density, electrical isolation, and transient robustness are critical.

FAQ

What is the maximum continuous power dissipation per diode at TC = 105 °C?

At TC = 105 °C, each diode supports up to 15 A average forward current, resulting in ~8.5 W conduction loss (calculated using P = 0.520 × IF(AV) + 0.0103 × IF²(RMS)). With Rth(j-c) = 5.30 °C/W, this yields ΔTj ≈ 45 °C above case temperature, staying within the 175 °C Tj(max) limit under proper heatsinking.

Can STPS30SM80CFP replace a single 30 A Schottky in a center-tapped transformer design?

No-it is a dual 15 A common-cathode device, not a single 30 A unit. In center-tapped configurations, it replaces two separate 15 A diodes, with A1 and A2 connecting to opposite transformer ends and K serving as the shared output. Using it as a single-diode substitute would violate current ratings and thermal derating rules.

Is the TO-220FPAB package compatible with standard TO-220 heatsinks?

Yes-the TO-220FPAB shares identical mounting hole pitch (L6 = 15.9–16.4 mm) and tab geometry with standard TO-220, but its insulated construction requires no additional insulating washer. Mounting torque must stay within 0.55–0.7 N·m to avoid cracking the epoxy housing while ensuring thermal contact integrity.

Does ST provide SPICE models for STPS30SM80CFP?

ST does not publish a dedicated SPICE model for STPS30SM80CFP. However, its electrical behavior can be accurately modeled using ST's generic Schottky diode macro-model (e.g., STPS30H100CG parameters scaled for VF, IR, and Cj), referenced in Application Note AN1768 for avalanche validation and conduction loss simulation in PSpice and LTspice environments.