STMicroelectronics STTH3010W

Overview

STTH3010W from STMicroelectronics is a 1000 V, 30 A ultrafast recovery high-voltage diode in DO-247 package, featuring 42 ns typical reverse recovery time (trr), 1.30 V typical forward voltage (VF) at 30 A and 15 µA max reverse leakage at 25 °C, designed for high-frequency rectification and freewheeling in industrial power supplies and motor control systems.

For engineers reviewing the STTH3010W datasheet, STTH3010W pinout, STTH3010W application, or STTH3010W equivalent, key selection criteria include soft recovery behavior (S = 1), low conduction loss (P ≈ 1.3×IF(AV) + 0.013×IF²RMS), 175 °C max junction temperature, and insulated package suitability for high-isolation auxiliary functions like snubbers and bootstrap circuits.

Technical Context

This diode employs an optimized silicon epitaxial structure enabling ultrafast, soft reverse recovery with controlled minority carrier lifetime-critical for minimizing EMI and voltage overshoot in hard-switched topologies. Its dynamic performance is characterized across wide dIF/dt ranges (up to 500 A/µs) and temperatures (up to 125 °C), ensuring stable operation under pulsed and high-frequency conditions.

The DO-247 package provides mechanical robustness and thermal performance (Rth(j-c) = 1.1 °C/W), while its intrinsic ruggedness supports repetitive surge currents up to 300 A (tp = 5 µs) and non-repetitive surges of 180 A (tp = 10 ms sinusoidal), making it suitable for demanding mission-critical rectification and freewheeling roles.

Key Specifications

Pinout & Package

STTH3010W is housed in a DO-247 surface-mount-compatible through-hole package with two terminals: anode and cathode. The package features a molded epoxy body meeting UL94 V0 flammability rating and is optimized for conduction cooling via PCB copper area or heatsink interface.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3010W, STTH3012W trades speed for voltage headroom, while MUR3010CT offers dual functionality at the cost of thermal performance and package compatibility-making STTH3010W optimal for space-constrained, high-frequency, single-diode freewheeling or rectification.

Availability

STTH3010W is available at Aetrix Electronics and suitable for industrial power supplies, motor control inverters, and snubber networks requiring stable component supply, long-lifecycle support, and traceable sourcing for production programs.

Supply support for STTH3010W 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, digital, and mixed-signal ICs and discrete devices for automotive, industrial, and power applications.

STTH3010W belongs to ST's high-voltage ultrafast diode product line, engineered specifically for high-efficiency, high-reliability rectification and freewheeling in industrial motor drives and switched-mode power supplies.

FAQ

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

The STTH3010W has a maximum junction temperature (Tj) of 175 °C. This rating allows operation in high-ambient environments such as enclosed motor drives or industrial power supplies without forced air cooling. Thermal design must ensure that junction-to-case thermal resistance (1.1 °C/W) and heatsink interface resistance keep Tj ≤ 175 °C under worst-case load and ambient conditions-typically requiring ≥ 25 cm² of 2 oz copper pour or a small external heatsink.

Is STTH3010W suitable for use in PFC boost diodes?

Yes-STTH3010W is qualified for PFC boost applications due to its 1000 V VRRM, 42 ns trr, and soft recovery (S = 1), which suppresses voltage overshoot and reduces EMI generation during boost switch turn-off. Its 30 A IF(AV) rating supports continuous conduction mode (CCM) operation up to ~2.5 kW with appropriate thermal management and layout.

How does the DO-247 package compare to TO-220AC in terms of thermal and mechanical performance?

The DO-247 package used in STTH3010W offers lower thermal resistance (1.1 °C/W vs 1.1 °C/W for TO-220AC) and superior mechanical stability under thermal cycling, with no leads to fatigue. Its flat, isolated base enables direct heatsink mounting without insulating washers, unlike TO-220AC which requires isolation hardware. DO-247 also provides higher creepage/clearance for high-voltage isolation.

Does STTH3010W meet RoHS and lead-free requirements?

Yes-STTH3010W is supplied in ST's ECOPACK® package with lead-free second-level interconnect, compliant with RoHS Directive 2011/65/EU and JEDEC JESD97. The inner box label indicates the lead-free category, and soldering profiles follow J-STD-020D for lead-free reflow, with peak temperature up to 260 °C.