STMicroelectronics STPS80L60CY

Overview

STPS80L60CY from STMicroelectronics is a dual center-tap Schottky rectifier optimized for low-voltage, high-frequency switching power supplies, with 60 V V_RRM, 80 A total average forward current (40 A per diode), 0.56 V max forward voltage at 125 °C, and 0.70 °C/W junction-to-case thermal resistance per diode - deployed in server VRMs and CAD workstation DC-DC converters.

For engineers reviewing the STPS80L60CY datasheet, STPS80L60CY pinout, STPS80L60CY application, or STPS80L60CY equivalent, key selection criteria include conduction loss modeling (P = 0.36×I_F(AV) + 0.005×I_F(RMS)²), avalanche capability (20 kW peak, 1 µs), dV/dt rating (10 kV/µs), and Max247 package thermal coupling between diodes.

Technical Context

This dual-diode Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap configuration), enabling synchronous rectification in half-bridge or full-wave topologies. Its negligible reverse recovery charge (Q_rr ≈ 0) and ultrafast switching eliminate snubber requirements in >100 kHz SMPS designs.

Thermal design leverages asymmetric thermal resistance: 0.70 °C/W (junction-to-case per diode) and 0.30 °C/W (case-to-case coupling), allowing accurate junction temperature prediction when both diodes conduct simultaneously using ∆T_j(diode1) = P_diode1×0.70 + P_diode2×0.30.

Key Specifications

Pinout & Package

Package: Max247 - isolated metal tab TO-247 variant with integrated thermal pad, 4.4 g mass, UL94-V0 epoxy, and 15.3–15.9 mm E dimension for PCB cutout clearance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-80CTQ060 and MUR860CT, STPS80L60CY delivers lower conduction loss (−10.7 % at 40 A), superior thermal coupling (0.30 vs. ≥0.45 °C/W), and true zero-recovery switching - making it optimal for high-density, high-efficiency server and telecom power systems.

Availability

STPS80L60CY is available at Aetrix Electronics and suitable for server VRMs, CAD workstation DC-DC converters, and industrial PLC power modules requiring stable component supply with long lifecycle visibility.

Supply support for STPS80L60CY 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, designing and manufacturing analog, microcontroller, power, and sensor ICs for industrial, automotive, and consumer markets.

The STPS series targets high-efficiency power conversion, with the STPS80L60CY specifically engineered for dual-path, low-V_F, high-current Schottky rectification in next-generation computing and communications infrastructure.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The absolute maximum junction temperature is 150 °C, verified per JEDEC JESD78. Operation at this limit requires strict thermal design: with 0.70 °C/W R_th(j–c), ambient must be ≤80 °C when dissipating 100 W total (50 W per diode) to maintain T_j ≤ 150 °C. Derating curves in Fig. 2 confirm 80 A I_F(AV) is valid only at T_c = 130 °C.

Can STPS80L60CY replace two separate STPS40L60C diodes?

Yes - STPS80L60CY integrates two STPS40L60C-equivalent dies in one Max247 package, sharing a common cathode. Pin compatibility is maintained (A1/A2/K), but thermal coupling (0.30 °C/W) improves system-level thermal balance versus discrete mounting. Layout must accommodate the larger Max247 footprint and ensure uniform heatsink contact across the full metal tab.

Is the avalanche rating tested per industry standard?

Yes - the 20,000 W P_ARM rating is measured per JEDEC JESD24-11 using 1 µs pulses at T_j = 25 °C. Fig. 3 and Fig. 4 provide normalized derating: at 10 µs pulse duration or 125 °C T_j, rated P_ARM drops to ~12,000 W and ~10,000 W respectively. This validates use in unclamped inductive switching without external snubbers.

How does the Max247 package differ from standard TO-247?

Max247 is ST's proprietary variant of TO-247 with enhanced thermal performance: it features a wider metal tab (E = 15.3–15.9 mm vs. standard 15.0 mm), optimized internal die attach for lower R_th(j–c), and UL94-V0 epoxy. Unlike standard TO-247, Max247 specifies coupling resistance (R_th(c) = 0.30 °C/W) between diodes - critical for dual-leg thermal modeling in multiphase designs.