STMicroelectronics STTH5L06FP

Overview

STTH5L06FP from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in TO-220FPAC insulated package, rated for 600 V repetitive peak reverse voltage, 5 A average forward current, and 65 ns typical reverse recovery time. It serves as a boost diode in continuous-conduction-mode PFC stages and as a freewheeling diode in hard-switching SMPS topologies.

For engineers reviewing the STTH5L06FP datasheet, STTH5L06FP pinout, STTH5L06FP application, or STTH5L06FP equivalent, key selection criteria include reverse recovery performance under dIF/dt stress, thermal resistance (6 °C/W junction-to-case), insulation rating (2000 VRMS), and conduction loss modeling using P = 0.89 × IF(AV) + 0.033 × IF²(RMS).

Technical Context

This device implements ST's Turbo 2 600 V process, optimized for low Qrr (typ. 45 nC at dIF/dt = 50 A/µs) and soft reverse recovery (softness factor >1.0), minimizing EMI and voltage overshoot in high-frequency switching converters. Its low VF (0.85 V typ. at 150 °C, 5 A) reduces conduction losses in high-duty-cycle applications.

The TO-220FPAC package provides 2000 VRMS isolation between lead frame and heatsink-mounting surface, enabling direct mounting to grounded metal chassis without additional insulation. Thermal design must account for Rth(j-c) = 6 °C/W and maximum junction temperature of 175 °C under TC = 135 °C conditions.

Key Specifications

Pinout & Package

STTH5L06FP uses the TO-220FPAC package: insulated plastic housing with metal tab (cathode) electrically isolated from internal lead frame, 3-pin configuration (Anode, Cathode, Isolated Tab), UL 94 V0 epoxy, recommended torque 0.55 N·m.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast high-voltage rectifier applications.

Compared with STTH8L06D and IXYS MUR560E, STTH5L06FP uniquely combines certified 2000 VRMS isolation, 65 ns trr, and 0.85 V VF at 150 °C in a single TO-220FPAC package-enabling simplified thermal/mechanical design in safety-regulated AC/DC systems without trade-offs in recovery speed or conduction loss.

Availability

STTH5L06FP is available at Aetrix Electronics and suitable for server power supply PFC stages, industrial SMPS freewheeling paths, and UPS inverter output rectification requiring stable component supply, long-lifecycle support, and certified isolation performance.

Supply support for STTH5L06FP 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.

STTH5L06FP belongs to ST's Turbo 2 ultrafast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion where low Qrr, soft recovery, and thermal robustness are critical in PFC and SMPS applications.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH5L06FP is rated for IF(AV) = 5 A at TC = 135 °C, meaning the case temperature must not exceed 135 °C under steady-state conditions. Exceeding this limit risks exceeding the 175 °C maximum junction temperature, especially with Rth(j-c) = 6 °C/W. Derating is required above 135 °C.

Does the TO-220FPAC package require an insulating washer when mounted to a heatsink?

No - the TO-220FPAC package features built-in electrical isolation between the metal tab and internal leads, rated for 2000 VRMS. Direct mounting to a grounded heatsink is permitted without an insulating washer, simplifying mechanical assembly and improving thermal contact.

How is conduction loss calculated for thermal design?

Conduction loss is calculated using the manufacturer-provided equation: P = 0.89 × IF(AV) + 0.033 × IF²(RMS). For example, at IF(AV) = 5 A and IF(RMS) = 7.07 A (square wave), P ≈ 0.89×5 + 0.033×50 = 4.45 + 1.65 = 6.1 W - which, combined with Rth(j-c) = 6 °C/W, yields ΔT = 36.6 °C above case temperature.

Can STTH5L06FP replace standard fast recovery diodes in existing 100 kHz designs?

Yes - its 65 ns trr (typ.) and soft recovery behavior make it a drop-in upgrade for standard FRDs (e.g., 150–200 ns trr) in 100 kHz designs. Measured benefits include reduced MOSFET voltage spikes, lower snubber dissipation, and improved EMI margin due to lower di/dt-induced ringing during recovery.