STMicroelectronics STTH15R06FP

Overview

STTH15R06FP from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in TO-220FPAC package, designed for boost-stage PFC in continuous conduction mode and freewheeling in hard-switching SMPS. It delivers 15 A average forward current, 600 V repetitive peak reverse voltage, 1.8 V max forward voltage at 125 °C, 50 ns max reverse recovery time, and 4.0 °C/W junction-to-case thermal resistance.

For engineers reviewing the STTH15R06FP datasheet, STTH15R06FP pinout, STTH15R06FP application, or STTH15R06FP equivalent, key selection criteria include reverse recovery performance under high dIF/dt (up to 200 A/µs), softness factor (0.15), low thermal resistance for surface-mount-compatible heatsinking, and robust surge capability (150 A IFSM).

Technical Context

This device implements ST's Turbo 2 600 V technology to minimize reverse recovery charge (Qrr = 220 nC) and peak reverse recovery current (IRM = 7.5–9.0 A at 125 °C), directly reducing switching losses in high-frequency PFC stages. Its low trr (30–50 ns) and controlled softness (Sfactor = 0.15) suppress voltage overshoot and EMI during turn-off.

The TO-220FPAC package features isolated mounting base (plastic body), enabling direct PCB mounting without insulating hardware while maintaining 4.0 °C/W thermal resistance - optimized for compact industrial power supplies where mechanical clearance and thermal management are co-constrained.

Key Specifications

Pinout & Package

STTH15R06FP uses a 3-terminal TO-220FPAC package with isolated metal tab (pin 2), where the cathode is connected to the tab and pins 1 and 3 are internally shorted as the anode terminal.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH15R06D, STTH15R06FP trades 2.5 °C/W higher thermal resistance for simplified mechanical mounting; versus MUR1560CT, it delivers lower Q_rr and softer recovery at the cost of single-diode configuration and slightly higher V_F at room temperature.

Availability

STTH15R06FP is available at Aetrix Electronics and suitable for industrial switch-mode power supplies, server rectification systems, LED driver power stages, and motor drive inverter freewheeling circuits requiring stable component supply and long-term manufacturability.

Supply support for STTH15R06FP 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, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STTH series belongs to ST's high-voltage rectifier product line, engineered specifically for energy-efficient power conversion in PFC, UPS, and industrial SMPS where ultrafast recovery, low Q_rr, and thermal robustness are mandatory.

FAQ

What is the maximum junction temperature rating for STTH15R06FP?

The absolute maximum operating junction temperature is 175 °C, as specified in Table 2 of the official datasheet (Doc ID 7974 Rev 2). This rating applies under steady-state conditions with proper heatsinking and accounts for thermal derating curves shown in Figure 3 and Figure 4 for both pulse and continuous operation.

Does STTH15R06FP have a built-in thermal shutdown feature?

No, STTH15R06FP is a passive silicon rectifier diode and does not include any integrated thermal protection circuitry. Thermal management relies entirely on external heatsinking and system-level monitoring; safe operation requires maintaining T_j ≤ 175 °C using the provided R_th(j-c) = 4.0 °C/W value and ambient thermal design.

Can STTH15R06FP be used as a replacement for STTH15R06D in existing designs?

Yes, electrically identical - same die, V_RRM, I_F(AV), t_rr, and Q_rr. However, the TO-220FPAC package has an isolated tab, eliminating need for insulating hardware but increasing R_th(j-c) from 1.5 to 4.0 °C/W. Layout and thermal validation are required before substitution.

What is the softness factor (Sfactor) of STTH15R06FP and why does it matter?

The softness factor is 0.15 (typical), defined as the ratio of time to peak reverse current (t_a) to total reverse recovery time (t_rr). A low Sfactor indicates gradual current decay, suppressing voltage overshoot and EMI during turn-off - critical for reliable operation with fast-switching SiC or GaN MOSFETs in modern PFC stages.