STMicroelectronics STTH3L06B-TR

Overview

STTH3L06B-TR from STMicroelectronics is an ultrafast high-voltage silicon rectifier diode in SMC package, rated for 600 V repetitive peak reverse voltage, 3 A average forward current, and 60 ns typical reverse recovery time. It features low forward voltage drop (0.85 V typ. at 150 °C), platinum-doped low leakage (<100 µA at 150 °C), and low thermal resistance (20 °C/W junction-to-lead). It is engineered as a boost diode in discontinuous/critical-mode PFC circuits and freewheeling diode in switch-mode power supplies.

For engineers reviewing the STTH3L06B-TR datasheet, STTH3L06B-TR pinout, STTH3L06B-TR application, or STTH3L06B-TR equivalent, key selection criteria include reverse recovery speed, conduction loss profile under varying duty cycles (δ = 0.05–1), thermal impedance behavior on FR4 PCBs, and compatibility with high-dIF/dt switching waveforms in 600 V power stages.

Technical Context

This device implements ST's Turbo 2 600 V technology, optimized for fast soft-recovery performance in high-frequency power conversion. Its platinum doping ensures stable leakage current up to 150 °C, while its low R_th(j-l) (20 °C/W) supports high-current operation without external heatsinking in compact SMC layouts.

The diode exhibits a softness factor >1.0 across dIF/dt range (20–200 A/µs), minimizing voltage overshoot and EMI during turn-off. Dynamic parameters-including t_rr, Q_RR, and I_RM-are characterized over temperature and dIF/dt, enabling accurate loss modeling using the provided conduction loss equation: P = 0.89 × I_F(AV) + 0.055 × I_F(RMS)².

Key Specifications

Pinout & Package

STTH3L06B-TR is housed in an SMC (DO-214AB) surface-mount package with two terminals: anode and cathode. The cathode is marked by a band on the body. Lead finish is matte tin, RoHS-compliant and ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3R06S and MUR3060CT, STTH3L06B-TR delivers superior combination of low-profile SMC packaging, lowest V_F at elevated temperature, and fastest soft recovery-making it the preferred choice for space-constrained, high-efficiency DCM/CCM PFC and high-frequency freewheeling where thermal and EMI margins are tight.

Availability

STTH3L06B-TR is available at Aetrix Electronics and suitable for AC-DC power factor correction, industrial switch-mode power supplies, and telecom intermediate bus converters requiring stable component supply and consistent parametric performance across production batches.

Supply support for STTH3L06B-TR 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 automotive, industrial, and consumer markets.

STTH3L06B-TR belongs to ST's Turbo 2 ultrafast rectifier product line, developed specifically for high-efficiency, high-frequency power conversion systems where low conduction loss, fast soft recovery, and thermal robustness are critical.

FAQ

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

The STTH3L06B-TR has a maximum operating junction temperature of 175 °C. At this limit, leakage current remains below 100 µA due to platinum doping, and forward voltage drop stays stable at 0.85 V (typ.). Operating continuously near T_j(max) reduces lifetime per Arrhenius model; derating to ≤150 °C extends MTBF by >3× in sealed enclosures.

Can STTH3L06B-TR replace standard fast recovery diodes in existing PFC designs?

Yes-provided layout accommodates SMC footprint and thermal pad area. Its 60 ns t_rr and soft recovery typically reduce snubber capacitor size by 30–50% versus 100+ ns diodes. However, verify peak reverse recovery current (I_RM) against MOSFET avalanche rating, as lower t_rr may increase dI/dt-induced voltage spikes if layout inductance is unoptimized.

Is the SMC package lead-finish compatible with lead-free reflow profiles?

Yes. STTH3L06B-TR uses matte tin (Sn) lead finish compliant with JEDEC J-STD-020D, supporting peak reflow temperatures up to 260 °C (20 sec max). The package meets IPC-A-610 Class 2 requirements, and no pre-baking is required for standard moisture sensitivity level (MSL) 1 handling.

How is conduction loss calculated for thermal design?

ST provides the validated empirical equation: P = 0.89 × I_F(AV) + 0.055 × I_F(RMS)². For example, at I_F(AV) = 3 A and I_F(RMS) = 4.2 A (δ = 0.5 square wave), conduction loss = 0.89×3 + 0.055×17.64 ≈ 3.6 W. Combine with R_th(j-l) = 20 °C/W to estimate junction temperature rise above PCB pad.