STMicroelectronics STTH2L06UFY

Overview

STTH2L06UFY from STMicroelectronics is an AEC-Q101-qualified ultrafast recovery power rectifier in SMB Flat package, designed for clamping and energy recovery in automotive 12 V/48 V systems. It delivers 2 A average forward current, 600 V repetitive peak reverse voltage, 50 ns typical reverse recovery time, 0.9 V typical forward voltage at 150 °C, and operates up to 175 °C junction temperature - enabling high-efficiency regenerative braking and DC-DC flyback snubbing.

For engineers reviewing the STTH2L06UFY datasheet, STTH2L06UFY pinout, STTH2L06UFY application, or STTH2L06UFY equivalent, key selection criteria include ultrafast trr (50 ns), low VF at high Tj (0.9 V @ 150 °C), AEC-Q101 qualification, SMB Flat wettable leads for automated optical inspection, and thermal robustness (Rth(j-l) = 18 °C/W).

Technical Context

This diode employs a planar epitaxial silicon structure optimized for low Qrr and controlled soft recovery, minimizing EMI in high-frequency switching converters. Its 50 ns trr and 7 V forward recovery voltage (VFP) support operation in 100–500 kHz automotive DC-DC stages where fast turn-off and low switching loss are critical.

The SMB Flat package features copper leadframe with wettable flank geometry, enabling reliable solder-joint inspection and thermal performance of Rth(j-l) = 18 °C/W. Junction temperature range spans –40 to +175 °C, with reverse leakage limited to 12 µA at 125 °C and 85 µA at 175 °C under 600 V bias.

Key Specifications

Pinout & Package

SMB Flat package: surface-mount, 2-terminal, gull-wing leads with wettable flanks (JEDEC MO-213AB). Dimensions: 3.3–3.95 mm length × 5.1–5.6 mm width × 0.9–1.1 mm height. Lead pitch: 2.07 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR260E and VS-2EY60-M3, STTH2L06UFY offers the lowest combined VF/trr product (0.9 V × 50 ns) and full AEC-Q101 + wettable flank compliance - making it optimal for space- and reliability-critical 48 V automotive power stages.

Availability

STTH2L06UFY is available at Aetrix Electronics and suitable for regenerative braking clamps, 48 V DC-DC flyback snubbers, and engine control unit power supplies requiring stable component supply across automotive production lifecycles.

Supply support for STTH2L06UFY 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, power, microcontroller, and sensor solutions for automotive, industrial, and consumer markets.

STTH2L06UFY belongs to ST's Turbo 2 ultrafast rectifier family, engineered specifically for high-efficiency energy recovery in automotive 12 V/48 V architectures - emphasizing low Qrr, high Tj capability, and AEC-Q101 reliability.

FAQ

Is STTH2L06UFY pin-compatible with STTH2L06-Y?

Yes - STTH2L06UFY and STTH2L06-Y share identical SMB Flat package dimensions, pinout (anode/cathode), and mechanical footprint. The "UFY" suffix denotes tape-and-reel packaging (5000 pcs/reel) with wettable flank leads, while "-Y" is the base part number used in datasheets and design references.

What is the maximum allowable PCB copper area for thermal performance?

Per Figure 12 in DS10490, Rth(j-a) drops from ~120 °C/W (no copper) to ~40 °C/W with 2 cm² of 70 µm copper on FR4. For continuous 2 A operation at 175 °C ambient, ≥3 cm² per lead is recommended to maintain Tj ≤ 175 °C without forced air.

Does STTH2L06UFY require a heatsink in automotive underhood applications?

No external heatsink is required when mounted on ≥3 cm² of 70 µm copper per lead. Its Rth(j-l) = 18 °C/W enables direct thermal transfer to PCB copper, validated for 175 °C junction operation in engine control modules with natural convection only.

How does trr vary with dIF/dt and temperature?

trr increases from 50 ns (25 °C, dIF/dt = 50 A/µs) to 120 ns at 125 °C under same dIF/dt (Figure 6). At fixed temperature, trr rises linearly with dIF/dt - reaching 200 ns at 500 A/µs - due to carrier lifetime modulation in the epitaxial layer.