STMicroelectronics STTH1R06

Overview

STTH1R06 from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode optimized for boost-stage power factor correction (PFC) and freewheeling in switch-mode power supplies. It features 600 V repetitive peak reverse voltage, 1 A average forward current (T_c = 100 °C), 25 ns maximum reverse recovery time, and low thermal resistance (45 °C/W junction-to-lead in DO-41). Its Turbo 2 technology enables reduced conduction and switching losses in high-frequency AC/DC converters.

For engineers reviewing the STTH1R06 datasheet, STTH1R06 pinout, STTH1R06 application, or STTH1R06 equivalent, key selection criteria include reverse recovery performance at dI/dt = −50 A/µs, forward voltage drop stability up to 150 °C, thermal impedance under pulsed conditions, and package-specific derating for DO-41, SMA, and SMB variants.

Technical Context

The STTH1R06 is a planar passivated PN-junction diode fabricated using ST's Turbo 2 process, delivering soft reverse recovery with S-factor >3 at dI/dt = 200 A/µs and T_j = 125 °C. Its dynamic behavior is characterized by low I_RM (peak reverse recovery current) and controlled Q_RR (reverse recovery charge), critical for minimizing EMI and snubber losses in PFC boost stages.

Thermal design relies on validated R_th(j-l) values: 45 °C/W (DO-41), 30 °C/W (SMA), and 25 °C/W (SMB), with junction-to-ambient resistance dependent on PCB copper area per lead. The device operates up to 175 °C junction temperature and supports surge currents up to 25 A (10 ms, sinusoidal) in DO-41 packaging.

Key Specifications

Pinout & Package

STTH1R06 is offered in three through-hole and surface-mount packages: DO-41 (axial lead), SMA (DO-214AC), and SMB (DO-214AA). All variants are cathode-marked with a band; the anode and cathode terminals are unidirectional and non-reversible.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1L06 and UF4007, the STTH1R06 uniquely balances ultrafast recovery (25 ns), soft switching (S > 3), and low VF (1.0 V) at elevated temperature-making it optimal for space-constrained, high-efficiency PFC and high-frequency freewheeling where both loss and EMI must be minimized.

Availability

STTH1R06 is available at Aetrix Electronics and suitable for power factor correction circuits, DC-DC converter freewheeling paths, and industrial AC/DC auxiliary supplies requiring stable component supply across multiple package variants (DO-41, SMA, SMB).

Supply support for STTH1R06 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 STTH series belongs to ST's high-voltage ultrafast rectifier product line, engineered specifically for high-efficiency, high-frequency power conversion in PFC, SMPS, and lighting applications where low recovery loss and thermal robustness are essential.

FAQ

What is the maximum junction temperature rating for STTH1R06?

The STTH1R06 has a maximum operating junction temperature of 175 °C, verified per absolute ratings table (Table 2) and supported by thermal characterization data across all package variants. This allows reliable operation in sealed enclosures or high-ambient environments such as industrial motor drives and outdoor LED drivers without derating below rated current.

Does STTH1R06 have a lead-free and RoHS-compliant package?

Yes, STTH1R06 is offered in ECOPACK®-compliant lead-free packages, including DO-41 (STTH1R06), SMA (STTH1R06A), and SMB (STTH1R06U). The device meets RoHS Directive 2011/65/EU and UL94 V0 flammability requirements, with full compliance documentation available via ST's official ECOPACK® portal.

How does reverse recovery time vary with dI/dt and temperature?

Per Figure 7 in the datasheet, t_rr increases from 25 ns (typical) at dI/dt = −50 A/µs and T_j = 25 °C to ~45 ns at dI/dt = −500 A/µs and T_j = 125 °C. This predictable, bounded variation enables accurate loss modeling in PFC controllers operating across full line/load/temperature ranges.

Can STTH1R06 replace UF4007 in existing designs?

STTH1R06 can replace UF4007 in high-frequency or efficiency-critical applications due to its superior t_rr (25 ns vs. 75 ns) and lower V_F at high temperature-but requires verification of PCB footprint compatibility (SMA/SMB vs. DO-41) and layout adjustments for reduced EMI. It is not a direct drop-in for low-frequency, cost-driven replacements where UF4007's higher V_RRM (1000 V) is utilized.