STMicroelectronics STTH1R06AFY

Overview

STTH1R06AFY from STMicroelectronics is an AEC-Q101-qualified 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 delivers low conduction loss (VF = 1.08 V at 150 °C, 1 A) and high surge capability (20 A non-repetitive), optimized for clamping and energy recovery in automotive PFC and boost circuits.

For engineers reviewing the STTH1R06AFY datasheet, STTH1R06AFY pinout, STTH1R06AFY application, or STTH1R06AFY equivalent, key selection criteria include junction temperature range (–40 to +175 °C), low leakage current (≤10 µA at 150 °C), thermal resistance (Rth(j–l) = 16–24 °C/W), and ECOPACK®2 compliance for automotive-grade reliability.

Technical Context

This diode employs a turbo 2 ultrafast silicon structure engineered to balance low forward voltage drop and fast soft recovery-critical for minimizing switching losses and EMI in high-frequency automotive power converters. Its 30 ns trr (typ.) and 90 nC QRR at 125 °C enable efficient operation in hard-switched PFC stages and flyback clamp networks.

The SOD128Flat package provides enhanced thermal performance via low Rth(j–l) and supports high-density PCB layouts. Junction-to-lead thermal resistance is specified at 16 °C/W (typ.), enabling sustained 1 A conduction at Tj up to 175 °C with appropriate copper land area (≥2 cm² recommended).

Key Specifications

Pinout & Package

SOD128Flat is a surface-mount, flat-lead, single-diode package with two terminals: cathode (K) and anode (A). The package features epoxy meeting UL94 V0, lead-free construction, and optimized thermal pad geometry for direct PCB copper conduction.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R06AFY, STTH1L06SFY trades faster recovery for lower VF, while VS-1EWH06-M3/54 offers similar speed but inferior thermal performance and incompatible packaging-making STTH1R06AFY optimal for space-constrained, thermally demanding automotive clamping and PFC.

Availability

STTH1R06AFY is available at Aetrix Electronics and suitable for automotive reverse polarity protection, clamping circuits, boost converters, and active PFC designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STTH1R06AFY 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, high-reliability power conversion in automotive and industrial applications-specifically engineered for low-loss, high-temperature, and fast-recovery operation in space-constrained modules.

FAQ

Is STTH1R06AFY suitable for 24 V commercial vehicle applications?

Yes. Its 600 V VRRM, –40 to +175 °C operating range, AEC-Q101 qualification, and 20 A surge rating make it fully suitable for 24 V commercial vehicle systems-including engine control units, HVAC controllers, and lighting drivers-where high transients and under-hood temperatures occur.

What is the minimum recommended copper area for thermal management?

Per Figure 12 in DS12434, a minimum of 2 cm² of 35 µm copper per lead reduces Rth(j–a) to ~3.5 °C/W. For continuous 1 A operation at 135 °C lead temperature, ≥3 cm² per lead is recommended to maintain Tj ≤ 175 °C in still air.

Does STTH1R06AFY have a soft recovery characteristic?

Yes. Its softness factor (S factor) remains near 2.5–3.0 across 50–500 A/µs dlF/dt range (Figure 9), indicating controlled, non-oscillatory turn-off behavior-critical for reducing EMI and voltage ringing in clamping and PFC applications.

Can STTH1R06AFY replace standard FR107 diodes in existing designs?

No. FR107 is a general-purpose 1 A, 1000 V, 500 ns recovery diode in DO-41 package. STTH1R06AFY has faster recovery (30 ns vs. 500 ns), lower VF, smaller SOD128Flat footprint, and automotive qualification-but requires PCB layout revision and thermal validation due to different package and electrical profile.