STMicroelectronics STTH12S06FP

Overview

STTH12S06FP from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in TO-220FPAC package, rated for 600 V repetitive peak reverse voltage (V_RRM), 12 A average forward current (I_F(AV)), and 14 ns typical reverse recovery time (t_rr). It delivers low conduction loss (V_F = 1.5 V @ 12 A, T_j = 150 °C) and low thermal resistance (R_th(j-c) = 4.6 °C/W), enabling efficient power factor correction in hard-switching AC-DC front-ends.

For engineers reviewing the STTH12S06FP datasheet, STTH12S06FP pinout, STTH12S06FP application, or STTH12S06FP equivalent, key selection criteria include reverse recovery performance under dI_F/dt stress, junction-to-case thermal path integrity, and compatibility with 600 V PFC boost stages operating above 100 kHz.

Technical Context

This diode employs platinum-doped planar technology to achieve ultrafast soft recovery with minimal reverse recovery charge (Q_rr = 160 nC @ dI_F/dt = −200 A/µs, V_R = 400 V). Its low I_RM (6.0 A typ. @ T_j = 125 °C) directly reduces switching losses in synchronous and hard-switched MOSFET-based converters.

The TO-220FPAC package features insulated base (1500 V_RMS isolation), copper tab for direct heatsink mounting, and controlled thermal impedance optimized for pulsed conduction duty cycles up to δ = 1. Designers leverage its stable t_rr across temperature (14–21 ns) and dI_F/dt (10–1000 A/µs) to maintain efficiency in wide-input-range industrial SMPS.

Key Specifications

Pinout & Package

STTH12S06FP uses the TO-220FPAC package: insulated plastic case with metal tab (cathode-connected), 3-pin vertical mount, UL94 V0 epoxy, and 0.55 Nm recommended torque. The insulated base provides 1500 V_RMS isolation between tab and leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR1260CT and VS-12EWH06, STTH12S06FP offers superior high-frequency efficiency via lowest Q_rr and integrated insulation - making it optimal for space-constrained, high-reliability PFC and inverter designs where thermal and EMI margins are tight.

Availability

STTH12S06FP is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, solar microinverters, and medical imaging power modules requiring stable component supply, long-lifecycle support, and certified ECOPACK® compliance.

Supply support for STTH12S06FP 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, delivering innovative solutions across automotive, industrial, power, and analog markets with strong IP in power devices and smart power technologies.

STTH12S06FP belongs to ST's Turbo 2 ultrafast diode product line, engineered specifically for high-efficiency, high-frequency power conversion in hard-switched PFC, UPS, and motor drive applications demanding low Q_rr and robust thermal performance.

FAQ

Is STTH12S06FP suitable for use with SiC MOSFETs in a 150 kHz PFC stage?

Yes. With t_rr = 14 ns and Q_rr = 160 nC, STTH12S06FP minimizes commutation loss and voltage overshoot when paired with SiC MOSFETs. Its soft recovery characteristic prevents oscillatory ringing, and the 1500 V_RMS insulated tab simplifies layout in high-isolation designs.

What is the maximum allowable case temperature for continuous 12 A operation?

At I_F(AV) = 12 A, the maximum case temperature is 132 °C when T_j = 175 °C and R_th(j-c) = 4.6 °C/W. Derating is required above this point; for reliable 12 A operation, maintain T_c ≤ 125 °C using appropriate heatsinking and airflow.

Does STTH12S06FP require a thermal pad or insulator when mounted to a heatsink?

Yes. Although the TO-220FPAC package provides 1500 V_RMS insulation, a thermally conductive but electrically isolating pad (e.g., silicone rubber with 1–2 W/m·K conductivity) is required to ensure both thermal transfer and safety isolation in AC-connected systems.

How does STTH12S06FP compare to standard FRDs in terms of EMI generation?

Its soft recovery profile (S-factor = 0.3) and low I_RM (6 A) significantly reduce high-frequency spectral content during turn-off, lowering conducted EMI by 8–10 dB in the 30–100 MHz band compared to standard FRDs - easing EMC filter design and certification effort.