STMicroelectronics STTH15AC06FP

Overview

STTH15AC06FP from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in insulated TO-220FPAC package, rated for 600 V repetitive peak reverse voltage, 15 A average forward current, and 40 ns typical reverse recovery time. It serves as a boost diode in continuous-mode interleaved PFC stages for air conditioning systems and as a freewheeling diode in industrial switch-mode power supplies.

For engineers reviewing the STTH15AC06FP datasheet, STTH15AC06FP pinout, STTH15AC06FP application, or STTH15AC06FP equivalent, key selection criteria include its low thermal resistance (4.4 °C/W), 2000 VRMS insulation rating, 1.15 V typical forward voltage at 15 A/150 °C, and soft-recovery behavior critical for EMI-sensitive high-frequency power conversion.

Technical Context

The STTH15AC06FP employs ST's Turbo 2 technology to achieve ultrafast switching with controlled softness (SFACTOR > 1.0 at dIF/dt = 100 A/µs), minimizing voltage overshoot and ringing during turn-off. Its low reverse leakage (20 µA at 150 °C, VR = 600 V) and stable VF across temperature support reliable operation in thermally demanding PFC and output rectification stages.

Designed for high-efficiency AC-DC conversion, it delivers 30 A RMS forward current capability and withstands 120 A non-repetitive surge (10 ms sine), enabling robust performance under transient load conditions without derating beyond junction temperature limits (Tj max = 175 °C).

Key Specifications

Pinout & Package

TO-220FPAC package: insulated plastic housing with electrically isolated tab (no internal metal connection between cathode and case), 3-pin configuration (Anode, Cathode, Isolated Tab), UL94 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 MUR1560CT and VS-15EWH06FN-M3, STTH15AC06FP uniquely combines 2000 VRMS insulation, 40 ns trr, and 4.4 °C/W thermal resistance in a TO-220FPAC outline-enabling simplified heatsinking, lower EMI filter cost, and Class I compliance without added isolation components.

Availability

STTH15AC06FP is available at Aetrix Electronics and suitable for air conditioning PFC modules, industrial SMPS output stages, UPS inverter protection circuits, and motor drive DC link clamping requiring stable component supply and long-term lifecycle continuity.

Supply support for STTH15AC06FP 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 microcontrollers, power devices, analog ICs, and sensors for automotive, industrial, and consumer markets.

The STTH series belongs to ST's Turbo 2 ultrafast rectifier product line, engineered specifically for high-efficiency, high-frequency AC-DC conversion in PFC, UPS, and motor drive applications where soft recovery and thermal robustness are critical.

FAQ

What is the maximum junction temperature and how does it affect thermal design?

The STTH15AC06FP has a maximum junction temperature of 175 °C. This allows operation in high-ambient environments such as enclosed HVAC enclosures or industrial cabinets. Thermal design must ensure Rth(j-a) remains below 10.3 °C/W at 15 A (based on 4.4 °C/W Rth(j-c) and typical heatsink resistance), requiring a minimum heatsink surface area of ~120 cm² with natural convection or forced airflow above 1 m/s.

Is the TO-220FPAC package truly electrically isolated, and what is its isolation rating?

Yes-the TO-220FPAC package features an electrically isolated metal tab with 2000 VRMS (50/60 Hz sine wave) isolation between the cathode and mounting surface. This is verified per IEC 60747-5-1 and enables direct mounting to grounded heatsinks without insulating pads, simplifying mechanical assembly and improving thermal contact in Class I safety-compliant equipment.

How does the soft recovery characteristic reduce EMI in PFC designs?

The STTH15AC06FP exhibits a softness factor (SFACTOR) > 1.0 at dIF/dt = 100 A/µs, meaning reverse current decay is gradual rather than abrupt. This suppresses high-frequency ringing and voltage overshoot during turn-off, directly lowering conducted EMI in the 150 kHz–30 MHz range and reducing required filter inductance/capacitance by up to 35% compared to standard fast diodes with hard recovery.

Can STTH15AC06FP replace standard 600 V fast recovery diodes in existing designs?

Yes-STTH15AC06FP is a drop-in replacement for TO-220FPAC-packaged 600 V, 15 A fast diodes (e.g., STTH1506D) with identical pinout and footprint. Its lower VF (1.15 V vs. 1.45 V), faster trr (40 ns vs. 75 ns), and soft recovery improve efficiency and EMI, but layout review is advised to confirm adequate heatsink contact and absence of parasitic inductance that could exaggerate dV/dt effects.