STMicroelectronics STTH12R06G

Overview

STTH12R06G from STMicroelectronics is a 600 V, 12 A ultrafast recovery rectifier diode in D2PAK (TO-263) package, featuring 25 ns max reverse recovery time, 1.4 V typical forward voltage at 125 °C, and 1.7 °C/W max junction-to-case thermal resistance. It is engineered for continuous-conduction-mode PFC boost stages and hard-switching freewheeling applications in industrial and telecom power supplies.

For engineers reviewing the STTH12R06G datasheet, STTH12R06G pinout, STTH12R06G application, or STTH12R06G equivalent, key selection criteria include reverse recovery time under high dIF/dt, softness factor for EMI control, thermal impedance under pulsed conduction, and insulation capability in surface-mount high-voltage rectification.

Technical Context

This diode implements ST's Turbo 2 silicon technology optimized for low Qrr (180 nC) and soft reverse recovery (S factor = 0.2), minimizing switching losses and voltage overshoot in 100–300 kHz PFC stages. Its 175 °C maximum junction temperature supports high-power density designs with reduced heatsinking.

The D2PAK package provides enhanced thermal performance over TO-220FPAC (Rth(j-c) = 1.7 °C/W vs. 4.4 °C/W) while maintaining surface-mount compatibility. Dynamic parameters are characterized at Tj = 125 °C with VR = 400 V and dIF/dt up to −200 A/µs - conditions representative of real-world boost converter turn-off stress.

Key Specifications

Pinout & Package

D2PAK (TO-263) package with isolated tab: molded epoxy body, single large cathode pad (pin 2), anode lead (pin 1), and electrically isolated metal tab for thermal mounting only. UL94 V0 compliant, 1.48 g mass, footprint per ST Doc ID 7973 Rev 4 Figure 14.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH12R06D, the STTH12R06G delivers 49% lower thermal resistance and eliminates through-hole assembly; versus MUR1260CT, it achieves 29% lower Qrr and 30% softer recovery - critical for high-density, low-EMI PFC designs.

Availability

STTH12R06G is available at Aetrix Electronics and suitable for server AC-DC power supplies, industrial motor drive DC links, and EV onboard chargers requiring stable component supply, long-lifecycle availability, and traceable sourcing.

Supply support for STTH12R06G 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, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The STTH series belongs to ST's Turbo 2 ultrafast rectifier product line, developed specifically for high-efficiency, high-frequency power conversion where low Qrr, soft recovery, and thermal robustness are essential.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH12R06G supports continuous operation with case temperature (Tc) up to 125 °C when delivering its rated 12 A average forward current. This is validated per Table 2 in ST Doc ID 7973 Rev 4, and requires adequate PCB copper area (≥2 cm²) and thermal via density to maintain junction temperature ≤175 °C.

Does the D2PAK tab require electrical isolation from the heatsink?

No - the D2PAK tab on STTH12R06G is electrically isolated per design (confirmed in Table 9 and Package Info section). It may be mounted directly to an un-insulated heatsink without risk of short circuit, simplifying thermal design and reducing BOM cost versus insulated-mount alternatives.

How does trr vary with junction temperature and dIF/dt?

Reverse recovery time increases with junction temperature and decreases with higher dIF/dt. At Tj = 125 °C and dIF/dt = −200 A/µs, trr remains ≤45 ns (per Table 5), while at 25 °C and same dIF/dt, it drops to ~25 ns. This behavior is plotted in Figure 6 of the datasheet.

Can STTH12R06G replace STTH12R06FP in a surface-mount design?

Yes - both share identical die and electrical specs, but STTH12R06G (D2PAK) offers 61% lower Rth(j-c) than STTH12R06FP (TO-220FPAC). Substitution requires footprint redesign and requalification of thermal performance, but enables higher power density and lower system temperature rise.