STMicroelectronics STTH8L06D

Overview

STTH8L06D from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in TO-220AC package, rated for 600 V repetitive peak reverse voltage and 8 A average forward current at Tc = 150 °C. It features 75 ns typical reverse recovery time, 0.85 V typical forward voltage at 150 °C, and low thermal resistance (2.5 °C/W junction-to-case), optimized for boost diodes in discontinuous/critical-mode PFC circuits.

For engineers reviewing the STTH8L06D datasheet, STTH8L06D pinout, STTH8L06D application, or STTH8L06D equivalent, key selection criteria include ultrafast trr performance under high dIF/dt, low conduction loss at elevated junction temperature, insulation capability in non-isolated power stages, and thermal management in compact 8 A switch-mode power supplies.

Technical Context

The STTH8L06D employs ST's Turbo 2 600 V technology to achieve soft, ultrafast recovery with 75 ns typical trr and 7.2–10 A peak reverse recovery current (IRM) at 125 °C under 100 A/µs dIF/dt. Its VF remains stable across temperature-0.85 V typ. at 150 °C/8 A-enabling predictable conduction loss modeling using P = 0.89 × IF(AV) + 0.022 × IF²(RMS).

Designed for high-frequency switching environments, it delivers low thermal resistance (2.5 °C/W j-c), supports surge currents up to 120 A (10 ms sine), and operates across -40 to +175 °C junction range. The TO-220AC package provides direct metal tab mounting for efficient conduction cooling without isolation requirements.

Key Specifications

Pinout & Package

STTH8L06D uses a standard 3-lead TO-220AC package with insulated metal tab (non-isolated version). The device has two terminals: Anode (lead 1) and Cathode (lead 2); the metal tab is electrically connected to the cathode and serves as the primary thermal path.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH8L06D, STTH8R06DJ adds isolation at the cost of thermal performance, while MUR860E trades higher room-temperature VF for broader vendor availability-neither matches STTH8L06D's combined low VF at high Tj and ultrafast soft recovery in non-isolated 8 A PFC designs.

Availability

STTH8L06D is available at Aetrix Electronics and suitable for server power supplies, industrial AC-DC adapters, telecom rectifier modules, and motor drive snubber circuits requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for STTH8L06D 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STTH8L06D belongs to ST's Turbo 2 ultrafast rectifier product line, engineered specifically for high-efficiency, high-frequency power factor correction and switching power supply applications demanding low trr, soft recovery, and thermal robustness.

FAQ

What is the maximum junction temperature for continuous operation?

The STTH8L06D supports continuous operation from -40 °C to +175 °C junction temperature. Its absolute maximum Tj is 175 °C, validated across all electrical parameters including VF, trr, and IR. Derating is not required up to this limit, provided thermal design maintains Tj ≤ 175 °C under worst-case load and ambient conditions.

Is the metal tab electrically isolated in the STTH8L06D package?

No-the STTH8L06D uses a standard TO-220AC package with the metal tab directly connected to the cathode. It is not electrically isolated. For insulated variants, ST offers STTH8L06DIRG (TO-220AC Insulated, 2500 V rms isolation) and STTH8L06FP (TO-220FPAC, 2000 V DC isolation).

How does trr vary with temperature and dIF/dt?

trr decreases with rising junction temperature-e.g., from ~105 ns at 25 °C to ~75 ns at 125 °C under identical test conditions (IF = 1 A, dIF/dt = -50 A/µs, VR = 30 V). It also increases linearly with dIF/dt: at 125 °C, trr rises from 75 ns at 50 A/µs to ~100 ns at 200 A/µs, per Figure 6 in the datasheet.

Can STTH8L06D replace older STTH8R06 devices in existing designs?

Yes-STTH8L06D is a direct replacement for STTH8R06 in TO-220AC packages. Both share identical pinout, thermal footprint, and key specs (VRRM = 600 V, IF(AV) = 8 A, trr ≈ 75 ns). STTH8L06D offers improved softness factor and tighter IR specification, enhancing reliability in high-dI/dt PFC stages without layout changes.