STMicroelectronics STTH3R02

Overview

STTH3R02 from STMicroelectronics is an ultrafast recovery silicon diode using platinum-doped planar technology, rated for 200 V repetitive peak reverse voltage and 3 A average forward current, with typical reverse recovery time of 16 ns at 125 °C and 100 °C junction temperature operation up to 175 °C - deployed in low-voltage, high-frequency inverters and free-wheeling paths.

For engineers reviewing the STTH3R02 datasheet, STTH3R02 pinout, STTH3R02 application, or STTH3R02 equivalent, key selection criteria include conduction loss (VF = 0.70–0.85 V at 3 A/100–150 °C), thermal resistance (Rth(j-l) = 30 °C/W in DO-201AD), surge capability (IFSM = 75 A), and package-specific RMS current ratings (70 A in SMC/DO-201AD).

Technical Context

This diode employs Pt-doping planar junction technology to achieve negligible switching losses and low forward/reverse recovery times - enabling efficient operation in hard-switched SMPS base-drive circuits and transistor snubbers. Its dynamic performance is characterized by dIF/dt-dependent trr (16–30 ns) and IRM (3.5–4.5 A) under defined test conditions.

Thermal design requires package-specific modeling: Rth(j-l) varies across DO-15 (45 °C/W), DO-201AD (30 °C/W), and SMC (20 °C/W); ambient thermal resistance depends on PCB copper area and lead length, with SMC offering lowest junction-to-case resistance for high-power density layouts.

Key Specifications

Pinout & Package

Packaged in DO-201AD, DO-15, and SMC surface-mount variants - all two-terminal axial or surface-mount devices with cathode marked by band (K). No internal terminals beyond anode and cathode; no control or sense pins.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3L06 and UF3002, the STTH3R02 delivers optimal balance of low VF (0.70 V), ultrafast trr (16 ns), and 200 V rating - making it preferred for high-efficiency, high-frequency (<1 MHz) freewheeling and clamping where thermal headroom is constrained.

Availability

STTH3R02 is available at Aetrix Electronics and suitable for low-voltage high-frequency inverters, transistor base-drive clamping, DC motor freewheeling, and polarity protection requiring stable component supply across DO-201AD, DO-15, and SMC package variants.

Supply support for STTH3R02 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STTH series targets high-efficiency power conversion with ultrafast recovery diodes optimized for SMPS, motor control, and snubber circuits - emphasizing low VF, low trr, and robust thermal performance.

FAQ

What is the maximum junction temperature for continuous operation?

The STTH3R02 is rated for continuous operation up to 175 °C junction temperature. This rating applies across all packages (DO-201AD, DO-15, SMC) and enables use in thermally demanding environments such as enclosed motor drives or high-density power supplies without forced cooling.

How does reverse recovery time vary with temperature and dIF/dt?

trr decreases with rising junction temperature and increasing dIF/dt: at 25 °C and dIF/dt = −100 A/µs, trr = 16–20 ns; at 125 °C and same dIF/dt, trr drops to 12–16 ns. Higher dIF/dt accelerates carrier sweep-out, improving switching speed but increasing IRM.

Can STTH3R02 replace standard fast recovery diodes in existing designs?

Yes - STTH3R02 is a direct replacement for legacy fast diodes like BYV26E or UF4004 in DO-201AD/DO-15 footprints. Its lower VF (0.70 V vs. 0.95 V) and faster trr (16 ns vs. 50 ns) reduce both conduction and switching losses, improving efficiency without layout changes.

Which package offers the best thermal performance for 3 A continuous current?

The SMC package delivers the best thermal performance: Rth(j-c) = 20 °C/W and IF(RMS) = 70 A - significantly lower junction-to-case resistance than DO-201AD (30 °C/W) or DO-15 (45 °C/W). For 3 A continuous operation with minimal heatsinking, SMC enables smaller PCB area and higher power density.