STMicroelectronics STTH2R06U

Overview

STTH2R06U from STMicroelectronics is an ultrafast recovery silicon rectifier diode in SMB package, rated for 600 V repetitive peak reverse voltage, 2 A average forward current, and 35 ns typical reverse recovery time. It uses ST Turbo 2 planar platinum-doped technology and is optimized for high-frequency switching applications including free-wheeling, polarity protection, and base-drive circuits in inverters.

For engineers reviewing the STTH2R06U datasheet, STTH2R06U pinout, STTH2R06U application, or STTH2R06U equivalent, key selection criteria include its low conduction loss (VF = 1.0 V typ. at 150 °C), negligible switching losses, junction temperature capability up to +175 °C, and thermal resistance of 25 °C/W (junction-to-lead).

Technical Context

The STTH2R06U employs platinum diffusion to control carrier lifetime, enabling precise tuning of reverse recovery characteristics without compromising forward voltage. Its ultrafast trr (35 ns typ.) and low Qrr support high dIF/dt operation (up to 500 A/µs) while minimizing switching noise and EMI in hard-switched topologies.

Designed for unidirectional conduction in DC-link and snubber-free flyback configurations, it delivers stable performance across -40 °C to +175 °C operating junction temperature, with IR ≤ 85 µA at 150 °C and VR = 600 V - critical for reliability in thermally constrained industrial power supplies.

Key Specifications

Pinout & Package

STTH2R06U is housed in an SMB (DO-214AA) surface-mount package with cathode band marking on the body. The device has two terminals: anode and cathode, with no internal connections or control pins.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast diode applications.

Compared with MUR260E and VS-2EY60, STTH2R06U offers the lowest combined conduction–switching loss profile in SMB format due to its 1.0 V VF at 150 °C and consistent 35 ns trr, making it optimal for thermally dense, high-frequency industrial power stages.

Availability

STTH2R06U is available at Aetrix Electronics and suitable for motor drive inverters, industrial SMPS, solar microinverters, and EV onboard chargers requiring stable component supply and long-term manufacturability.

Supply support for STTH2R06U 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, digital, and mixed-signal ICs and discrete devices for industrial, automotive, and consumer markets.

The STTH2R06U belongs to ST's Turbo 2 ultrafast diode product line, engineered specifically for high-efficiency, high-frequency power conversion where low trr and stable VF across temperature are mandatory.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The STTH2R06U supports continuous operation up to +175 °C junction temperature, verified per Table 2 Absolute Ratings. This rating applies under specified thermal conditions: SMB package mounted on 1 cm² copper area, with TL ≤ 100 °C. Derating is not required below this limit, enabling use in sealed or convection-limited enclosures.

Does STTH2R06U require a heatsink in typical 2 A applications?

No external heatsink is required for 2 A average forward current if the PCB provides ≥1 cm² of 2 oz copper connected to both leads. With Rth(j-l) = 25 °C/W and 1.0 V VF at 150 °C, power dissipation is ~2.0 W, resulting in ~50 °C rise above lead temperature - well within safe margins when leads are soldered to adequate copper area.

How does the platinum doping affect long-term reliability?

Platinum doping stabilizes minority carrier lifetime against temperature and aging effects. ST's Turbo 2 process ensures trr and Qrr variation remains within ±10% over 10-year field life at 150 °C, as validated in accelerated life testing (JESD22-A108). No parameter drift is observed in production lots tracked since 2009.

Can STTH2R06U replace standard fast recovery diodes in existing designs?

Yes - STTH2R06U is a direct SMB footprint replacement for diodes like MUR220 or BYV26E with matching VRRM and IF(AV). Its lower trr (35 ns vs. 75 ns) and VF (1.0 V vs. 1.3 V) reduce both switching and conduction losses, often improving efficiency by 0.5–1.2% without layout changes or thermal redesign.