STMicroelectronics STTH3L06

Overview

STTH3L06 from STMicroelectronics is a 600 V, 3 A ultrafast high-voltage rectifier diode using Turbo 2 technology with 60 ns typical reverse recovery time, 0.85 V typical forward voltage at 150 °C, and platinum-doped low leakage (≤100 µA at 150 °C). It serves as a boost diode in discontinuous/critical-mode PFC circuits and as a freewheeling diode in SMPS and industrial power converters.

For engineers reviewing the STTH3L06 datasheet, STTH3L06 pinout, STTH3L06 application, or STTH3L06 equivalent, key selection criteria include reverse recovery softness (S-factor >1.0), thermal resistance (20 °C/W junction-to-lead in DO-201AD), conduction loss equation (P = 0.89×IF(AV) + 0.055×IF²(RMS)), and ECOPACK®-compliant packaging options (DO-201AD, SMB, SMC).

Technical Context

This device implements ST's Turbo 2 silicon process optimized for high-voltage ultrafast switching, featuring platinum diffusion to suppress minority carrier lifetime and achieve controlled soft recovery. Its dynamic behavior is characterized by low trr (60 ns typ.), low tfr (100 ns max), and low VFP (7.5 V max) under high dIF/dt conditions.

The diode operates with maximum junction temperature of 175 °C and supports surge currents up to 70 A (DO-201AD, 10 ms sine half-wave). Thermal design relies on validated Rth(j-l) values: 20 °C/W (DO-201AD/SMC), 25 °C/W (SMB), enabling reliable operation in compact, high-power-density converters.

Key Specifications

Pinout & Package

STTH3L06 is a two-terminal axial-lead diode in DO-201AD package (also available in SMB and SMC surface-mount variants). Cathode is marked by a band on the body.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3R06 and VS-3EYH06-M3, STTH3L06 delivers balanced trade-off between trr (60 ns), VF (0.85 V), and IR (100 µA), making it optimal for mainstream 100–200 kHz industrial PFC and SMPS where thermal and EMI constraints coexist.

Availability

STTH3L06 is available at Aetrix Electronics and suitable for AC-DC power factor correction, industrial switch-mode power supplies, motor drive snubber networks, and uninterruptible power supply rectification requiring stable component supply and long-term lifecycle support.

Supply support for STTH3L06 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

STTH3L06 belongs to the Turbo 2 ultrafast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in industrial and computing power supplies where low trr, soft recovery, and high-temperature stability are essential.

FAQ

What is the maximum junction temperature and how does it affect reliability?

The STTH3L06 has a maximum junction temperature of 175 °C. Operating continuously near this limit requires careful thermal design-especially with Rth(j-l) = 20 °C/W-but enables use in sealed, high-ambient environments like industrial UPS or motor drives. Derating curves in Figure 1 confirm stable conduction loss up to 175 °C, ensuring long-term reliability when PCB copper area and lead soldering meet ST's recommended footprint guidelines.

How does platinum doping improve performance compared to standard fast diodes?

Platinum doping controls minority carrier lifetime in the silicon, resulting in lower reverse leakage (≤100 µA at 150 °C) and more predictable, softer reverse recovery (S-factor >1.0). This reduces EMI generation and voltage overshoot during turn-off-critical in high-dIF/dt applications like PFC boost stages-while maintaining low trr (60 ns) without sacrificing forward voltage.

Can STTH3L06 be used in surface-mount designs, and which package variant is recommended?

Yes-STTH3L06 is offered in SMB (STTH3L06U) and SMC (STTH3L06S) surface-mount packages. For space-constrained 3 A applications with moderate thermal demand, SMB is preferred due to its smaller footprint (3.3 × 5.1 mm); for higher surge robustness and better thermal dissipation, SMC (5.6 × 7.8 mm) is recommended, especially where IFSM = 60 A must be sustained.

What is the conduction loss calculation formula and how is it applied in design?

The datasheet provides P = 0.89 × IF(AV) + 0.055 × IF²(RMS) for estimating total conduction loss. For a 3 A average current with δ = 0.5 square wave, IF(RMS) = 3 A / √0.5 ≈ 4.24 A, yielding P ≈ 0.89×3 + 0.055×(4.24)² ≈ 3.5 W. This equation accounts for both linear and quadratic resistive components, enabling accurate thermal modeling without iterative VF interpolation.