STMicroelectronics STTH8006W

Overview

STTH8006W from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in DO-247 package, rated for 600 V repetitive peak reverse voltage, 80 A average forward current at Tc = 75 °C, and 70 ns maximum reverse recovery time. It serves as a discontinuous-mode PFC boost diode and free-wheeling diode in industrial switching power supplies, leveraging low 1.02 V typical forward voltage at 150 °C to minimize conduction losses.

For engineers reviewing the STTH8006W datasheet, STTH8006W pinout, STTH8006W application, or STTH8006W equivalent, key selection criteria include thermal resistance (0.75 °C/W), surge capability (500 A IFSM), junction temperature limit (175 °C), and dynamic performance under high dIF/dt (up to 500 A/µs).

Technical Context

The STTH8006W employs ST's Turbo 2 process for optimized carrier lifetime control, enabling ultrafast recovery with low Qrr and minimal tail current. Its design targets high-frequency rectification where low trr and low VF must coexist without excessive IR or thermal runaway.

It operates with defined thermal boundary conditions: junction-to-case resistance of 0.75 °C/W, maximum storage temperature from –65 °C to +175 °C, and validated dynamic behavior across Tj = 25–150 °C, including IRM up to 19 A and tfr ≤ 600 ns under 200 A/µs dIF/dt.

Key Specifications

Pinout & Package

STTH8006W is a two-terminal axial device in DO-247 package: anode and cathode leads are unmarked but physically distinguishable by cathode band marking ('K') on the body per standard diode convention. The package uses epoxy meeting UL94 V0, with recommended mounting torque of 0.8 Nm.

Key Features

Applications

Availability

STTH8006W is available at Aetrix Electronics and suitable for industrial switching power supplies, PFC boost stages, motor drive freewheeling circuits, and snubberless inductive load rectification requiring stable component supply and long-lifecycle support.

Supply support for STTH8006W 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, discrete devices, and MEMS sensors for industrial, automotive, and consumer applications.

The STTH8006W belongs to ST's Turbo 2 ultrafast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion systems where low conduction and switching losses are critical.

FAQ

What is the maximum junction temperature and how is it enforced?

The STTH8006W has a maximum operating junction temperature of 175 °C, verified per absolute ratings table. This limit is enforced through thermal design: with Rth(j-c) = 0.75 °C/W and 80 A IF(AV), the case temperature must be held ≤115 °C to avoid exceeding TJ(max); heatsink sizing and mounting torque (0.8 Nm) are critical to maintain this thermal path.

How does STTH8006W compare to standard fast recovery diodes in PFC applications?

Compared to standard fast recovery diodes (e.g., trr > 150 ns), STTH8006W delivers 50% lower trr (70 ns max) and 15–20% lower VF at 150 °C, directly reducing both switching and conduction losses. Its Turbo 2 process also yields lower Qrr and more linear IR vs. temperature behavior, improving light-load efficiency and thermal stability in DCM PFC.

Is STTH8006W suitable for synchronous rectification topologies?

No - STTH8006W is a unidirectional silicon PN junction rectifier, not a MOSFET-based synchronous rectifier. It lacks gate control, body diode optimization, or low RDS(on) characteristics required for SR. Its role is strictly as a high-performance hard-commutated freewheeling or boost rectifier in non-synchronous topologies.

What mechanical mounting requirements apply to the DO-247 package?

The DO-247 package requires mechanical mounting via its axial leads to a heatsink or PCB copper plane. Recommended torque is 0.8 Nm (maximum 1.0 Nm) when using threaded stud or bolt attachment. The epoxy body meets UL94 V0 flammability rating, and thermal interface material should be applied between case and heatsink to maintain Rth(j-c) ≤ 0.75 °C/W.