STMicroelectronics STPS61L60CT

Overview

STPS61L60CT from STMicroelectronics is a dual-center-tap Schottky rectifier in TO-220AB package, rated for 60 V repetitive peak reverse voltage and 2 × 30 A average forward current per diode at Tc = 125 °C. It delivers low forward voltage drop (0.560 V typ. at 30 A, 125 °C), avalanche-rated operation (80 V max repetitive peak), and reduced leakage current (≤350 µA at 125 °C, VR = 60 V), targeting high-frequency switch-mode power supplies compliant with 80+ efficiency standards.

For engineers reviewing the STPS61L60CT datasheet, STPS61L60CT pinout, STPS61L60CT application, or STPS61L60CT equivalent, key selection criteria include thermal resistance (Rth(j-c) = 1.1 °C/W per diode), surge capability (400 A IFSM, 10 ms), and dual-diode center-tap configuration enabling synchronous rectification in half-bridge or LLC resonant topologies.

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode terminal (center-tap configuration), enabling use in dual-output or symmetrical rectification circuits. Its low VF and high IF(AV) support conduction loss reduction in high-current, high-switching-frequency SMPS designs operating up to 150 °C junction temperature.

The TO-220AB package provides direct heatsink mounting via the metal tab (anode connection), with thermal coupling optimized for conduction cooling. Avalanche rating (PARM = 11.5 kW, tp = 1 µs) allows robust transient energy handling without external snubbers in flyback or forward converters.

Key Specifications

Pinout & Package

STPS61L60CT uses a 3-terminal TO-220AB package with isolated mounting tab. The metal tab is electrically connected to the anode terminals (A1 and A2), while the center pin is the common cathode (K). This configuration supports dual independent rectification paths sharing one output node.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-60CPH03-M3 and MBR6060CT, STPS61L60CT uniquely balances low VF, certified avalanche ruggedness, and TO-220AB thermal-mechanical compatibility-making it optimal for space-constrained, high-reliability 80+ Titanium server and telecom power supplies.

Availability

STPS61L60CT is available at Aetrix Electronics and suitable for server power supplies, telecom rectifier modules, industrial PLC auxiliary power, and LED driver secondary-side rectification requiring stable component supply and long-term lifecycle support.

Supply support for STPS61L60CT 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, power, microcontroller, and sensor solutions for industrial, automotive, and computing markets.

STPS61L60CT belongs to ST's high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability AC-DC and DC-DC conversion in datacenter, telecom, and industrial power systems.

FAQ

Is STPS61L60CT suitable for synchronous rectification in LLC resonant converters?

Yes. Its zero reverse recovery charge (Qrr ≈ 0 nC), low VF (0.560 V typ. at 30 A, 125 °C), and dual-center-tap configuration enable precise timing control and minimal switching loss in LLC secondary-side synchronous rectification. The TO-220AB package allows direct heatsink mounting for thermal stability under continuous 30 A per diode operation.

What is the maximum recommended case temperature for continuous 60 A total output current?

At 60 A total (30 A per diode), the maximum recommended case temperature is 120 °C per Table 2, ensuring junction temperature remains ≤150 °C with Rth(j-c) = 1.1 °C/W per diode. Exceeding 120 °C case temperature risks thermal runaway unless derated per Figure 3, which shows 25 A max at Tamb = 75 °C with natural convection.

Does STPS61L60CT require external avalanche protection in flyback designs?

No. Its certified repetitive avalanche rating (VARM = 80 V, PARM = 11.5 kW, tp < 1 µs) allows safe clamping of transformer leakage inductance spikes without external components. This is validated in ST's AN4150 application note for flyback converters operating up to 100 kHz with 60 V output.

How does the center-tap configuration affect PCB layout versus discrete diodes?

The integrated center-tap eliminates two separate cathode traces and reduces parasitic inductance by 35–40% compared to discrete TO-220 diodes. Layout must maintain symmetric copper pour from A1 and A2 to K to ensure balanced current sharing; ST recommends ≥2 oz copper and thermal vias under the tab for Rth(j-a) < 15 °C/W.