STMicroelectronics STTH1L06RL

Overview

STTH1L06RL from STMicroelectronics is a 600 V, 1 A ultrafast high-voltage rectifier diode in DO-41 package, optimized as a boost diode in discontinuous/critical conduction mode PFC stages and as a freewheeling diode in switch-mode power supplies. It delivers 80 ns max reverse recovery time, 1.05 V max forward voltage at 150 °C, and 75 µA max reverse leakage at 150 °C, enabling reduced switching and conduction losses in compact AC/DC front-ends.

For engineers reviewing the STTH1L06RL datasheet, STTH1L06RL pinout, STTH1L06RL application, or STTH1L06RL equivalent, key selection criteria include its 600 V repetitive peak reverse voltage, ultrafast 55–80 ns trr performance, low thermal resistance (Rth(j-l) = 45 °C/W), DO-41 cathode-banded package compatibility, and suitability for PFC and flyback secondary-side rectification.

Technical Context

This diode employs ST's Turbo 2 600 V technology to achieve soft, ultrafast recovery with low IRM and Qrr-critical for minimizing EMI and voltage overshoot in high-frequency PFC and SMPS designs. Its dynamic behavior is characterized under standardized conditions: IF = 1 A, dIF/dt = −50 A/µs, VR = 30 V, Tj = 25 °C.

The device operates up to 175 °C junction temperature and exhibits stable VF (0.85–1.05 V) and IR (1–75 µA) across −65 to +175 °C, supporting reliable operation in thermally constrained industrial and consumer power supplies without derating penalties typical of slower rectifiers.

Key Specifications

Pinout & Package

STTH1L06RL is housed in a DO-41 plastic axial package with cathode indicated by a band on the body. Leads are tinned and compliant with UL 94 V0 flammability standard. 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 and ES1J-E3/54, STTH1L06RL uniquely balances ultrafast recovery (80 ns), low VF (1.05 V), and DO-41 thermal capability at TC = 120 °C-making it the optimal choice for cost-sensitive, thermally constrained PFC and mid-power SMPS where both switching and conduction losses must be minimized simultaneously.

Availability

STTH1L06RL is available at Aetrix Electronics and suitable for universal-input AC/DC adapters, industrial DIN-rail power supplies, and LED driver front-ends requiring stable component supply, consistent DO-41 form factor, and verified 600 V/1 A ultrafast rectification performance.

Supply support for STTH1L06RL 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.

STTH1L06RL belongs to ST's Turbo 2 ultrafast diode product line, engineered specifically for high-efficiency, high-frequency power conversion in PFC, SMPS, and auxiliary supply circuits where low trr, soft recovery, and thermal robustness are essential.

FAQ

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

The STTH1L06RL has a maximum junction temperature (Tj) of 175 °C, validated per JEDEC JESD22-A108. Operating continuously at or below this limit ensures >10-year lifetime under typical thermal cycling profiles. Derating is not required up to 150 °C junction, where VF and IR remain within spec-enabling simplified thermal design in enclosed power supplies.

Can STTH1L06RL replace standard FR107 diodes in existing designs?

Yes-STTH1L06RL is a direct DO-41 drop-in replacement for FR107 in most applications, offering identical pinout and footprint. However, its 80 ns trr (vs. FR107's 500 ns) reduces switching loss and EMI, while its 1.05 V VF (vs. FR107's 1.3 V) improves efficiency. Layout changes are unnecessary unless snubber components were oversized for FR107's slow recovery.

Is STTH1L06RL suitable for use in automotive-grade power supplies?

STTH1L06RL is not qualified to AEC-Q101 and lacks automotive-specific screening or guaranteed PPAP documentation. While it operates reliably from −65 to +175 °C, ST recommends its automotive-qualified counterparts (e.g., STTH1L06TV1) for under-hood or safety-critical vehicle systems where qualification compliance is mandatory.

How does the DO-41 package impact thermal performance in PCB-mounted applications?

In standard FR4 PCB mounting with 10 mm lead length, STTH1L06RL achieves Rth(j-l) = 45 °C/W and Rth(j-a) = 70 °C/W. To optimize thermal performance, use ≥5 cm² copper pour per lead (per Figure 14), avoid narrow traces, and ensure solder fillets fully wet both leads-this can reduce Rth(j-a) by up to 30%, supporting sustained 1 A operation without forced air.