STMicroelectronics STTH1R06RL

Overview

STTH1R06RL from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in DO-41 package, rated for 600 V repetitive peak reverse voltage, 1 A average forward current, and 25 ns maximum reverse recovery time. It serves as a boost diode in active PFC circuits and as a freewheeling diode in switch-mode power supplies.

For engineers reviewing the STTH1R06RL datasheet, STTH1R06RL pinout, STTH1R06RL application, or STTH1R06RL equivalent, key selection criteria include ultrafast trr (≤25 ns), low VF (1.0 V typ. at 150 °C), low IR (75 µA max. at 150 °C), and thermal resistance Rth(j-l) = 45 °C/W - critical for high-efficiency, high-frequency power conversion designs.

Technical Context

The STTH1R06RL employs ST's Turbo 2 technology to achieve soft, ultrafast reverse recovery with low stored charge (Qrr ≤ 125 nC typical at dIF/dt = 200 A/µs) and minimal reverse recovery current (IRM ≤ 4 A). Its junction-to-lead thermal resistance of 45 °C/W enables reliable operation at Tj up to 175 °C under continuous conduction.

Designed for hard-switched topologies, it delivers stable VF (1.0–1.25 V at 150 °C, IF = 1 A) and exhibits low forward recovery voltage (VFP ≤ 10 V) and time (tfr ≤ 100 ns), reducing switching stress in boost and flyback converters.

Key Specifications

Pinout & Package

STTH1R06RL is housed in a DO-41 axial-leaded plastic package (UL94 V0 compliant, lead-free), with cathode identified by a band on the body. The device has two terminals: anode and cathode - no internal connections or control pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06RL, STTH1L06RL trades blocking voltage for speed and conduction efficiency in low-voltage rails, while ES1J-E3/54 offers identical voltage rating but compromises trr and VF - making STTH1R06RL optimal for 600 V PFC where both speed and thermal robustness are essential.

Availability

STTH1R06RL is available at Aetrix Electronics and suitable for active power factor correction, switch-mode power supply freewheeling, and industrial auxiliary power rectification requiring stable component supply and long-term manufacturability.

Supply support for STTH1R06RL 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, specializing in power management, analog, microcontrollers, and automotive ICs.

The STTH series belongs to ST's high-voltage ultrafast rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in industrial, computing, and lighting applications.

FAQ

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

The STTH1R06RL has a maximum junction temperature (Tj) of 175 °C. This rating allows sustained operation in high-ambient environments such as enclosed power supplies or motor drives without thermal derating below 1 A average current, provided the lead temperature remains ≤130 °C per thermal design rules.

Is STTH1R06RL suitable for use in synchronous rectification topologies?

No - STTH1R06RL is a passive silicon PN junction rectifier, not a MOSFET-based synchronous rectifier. It lacks gate control, body diode optimization, or low RDS(on) characteristics required for synchronous operation. It functions exclusively as a unidirectional, voltage-controlled switch in conventional hard-switched topologies.

How does the DO-41 package impact thermal performance compared to SMA or SMB variants?

The DO-41 package has higher junction-to-lead thermal resistance (45 °C/W) than SMA (30 °C/W) or SMB (25 °C/W), meaning it requires larger copper land area or external heatsinking to maintain Tj ≤175 °C at full 1 A load. However, its axial leads simplify through-hole assembly and improve mechanical robustness in vibration-prone industrial systems.

Can STTH1R06RL replace older 1N4007 diodes in high-frequency designs?

No - while both are DO-41 rectifiers, the 1N4007 has trr > 2 µs and VF ≈ 1.1 V at 25 °C, making it unsuitable for >20 kHz operation. STTH1R06RL's 25 ns trr and soft recovery enable efficient use in PFC and SMPS above 50 kHz, where 1N4007 would cause excessive loss, overheating, and EMI.