STMicroelectronics STTH1R06AF

Overview

STTH1R06AF from STMicroelectronics is an ultrafast recovery power rectifier in SOD128Flat package, rated for 600 V repetitive peak reverse voltage, 1 A average forward current, and 30 ns typical reverse recovery time. It serves as a boost diode in PFC circuits and clamping diode in energy recovery blocks, delivering low conduction loss (VF = 1.08 V @ 150 °C) and high surge capability (20 A non-repetitive).

For engineers reviewing the STTH1R06AF datasheet, STTH1R06AF pinout, STTH1R06AF application, or STTH1R06AF equivalent, key selection criteria include ultrafast trr performance, thermal robustness up to 175 °C junction temperature, low leakage (<1 µA @ 25 °C), ECOPACK2 compliance, and SOD128Flat space-saving footprint for high-density power stage layouts.

Technical Context

This device employs a planar epitaxial silicon structure optimized for fast soft recovery, achieving a balance between low VF and minimal QRR (90 nC typical). Its dynamic behavior is characterized by controlled dlF/dt dependence: trr increases from 30 ns to 65 ns and IRM rises to 3 A as di/dt escalates from 50 to 200 A/µs under 400 V reverse bias.

The SOD128Flat package provides low thermal resistance (Rth(j–l) = 16–24 °C/W) and enables direct PCB copper thermal spreading. Junction-to-ambient thermal resistance drops below 3.0 °C/W with ≥2 cm² copper area per lead on FR4, supporting continuous 1 A operation without heatsinking in compact industrial converters.

Key Specifications

Pinout & Package

The STTH1R06AF is a two-terminal axial-lead-equivalent surface-mount diode in the SOD128Flat package. It has no internal pins; terminals are labeled Anode (A) and Cathode (K) on the top marking surface, with cathode indicated by a band. The flat, low-profile package (2.4 mm × 4.7 mm × 1.0 mm) supports automated placement and high thermal dissipation via exposed copper pads.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast power rectifier applications.

Compared with STTH1L06S and ES1J, the STTH1R06AF uniquely balances 1 A current capability, 30 ns trr, and 1.08 V VF at elevated temperature in a compact SOD128Flat package-making it optimal for space-constrained, high-efficiency industrial PFC and clamping circuits.

Availability

STTH1R06AF is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, active PFC boost stages, and motor drive DC bus clamping requiring stable component supply and long-term lifecycle support.

Supply support for STTH1R06AF 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 microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STTH ultrafast rectifier product line targets high-efficiency AC-DC conversion and energy recovery systems, emphasizing low-loss, high-reliability diodes for industrial and telecom power supplies.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The STTH1R06AF is rated for continuous operation up to 175 °C junction temperature. This allows sustained 1 A conduction in high-ambient environments when PCB copper area and airflow meet thermal design guidelines-specifically, ≥2 cm² of 35 µm copper per lead on FR4 reduces Rth(j–a) to ~3.0 °C/W.

How does the soft recovery characteristic benefit EMI performance?

The STTH1R06AF exhibits a softness factor >3 across its operating range, meaning reverse current decay is gradual rather than abrupt. This suppresses high-frequency ringing and dv/dt-induced noise, lowering conducted EMI by up to 10 dB in PFC boost diode positions compared to standard fast recovery diodes.

Can STTH1R06AF replace standard FR107 diodes in existing designs?

No-STTH1R06AF is not a drop-in replacement for FR107. While both are 600 V diodes, FR107 has trr ≈ 500 ns and VF ≈ 1.3 V, whereas STTH1R06AF offers 30 ns trr and lower VF at high temperature. Layout and snubber redesign may be needed to exploit its ultrafast performance and avoid oscillation.

Is the SOD128Flat package compatible with standard reflow profiles?

Yes-the SOD128Flat package is lead-free and qualified for standard Pb-free reflow profiles (J-STD-020, peak 260 °C). Its epoxy meets UL94 V0 flammability rating, and thermal mass supports uniform heating; recommended preheat ramp rate is 1–3 °C/s to avoid thermal shock to the die bond.