STMicroelectronics STTH2R02U

Overview

STTH2R02U from STMicroelectronics is a 200 V, 2 A ultrafast recovery diode in SMB package, featuring 15 ns typical reverse recovery time (trr), 0.70–0.80 V forward voltage drop at 150 °C/2 A, and 175 °C maximum junction temperature - optimized for flyback diodes and auxiliary power supplies in high-frequency SMPS.

For engineers reviewing the STTH2R02U datasheet, STTH2R02U pinout, STTH2R02U application, or STTH2R02U equivalent, key selection criteria include trr ≤ 20 ns at 125 °C, VF < 0.85 V @ 100 °C, Rth(j-l) = 30 °C/W, and ECOPACK®2-compliant SMB packaging for thermal reliability in compact industrial converters.

Technical Context

This diode employs ST's patented planar platinum-doped silicon technology to achieve ultrafast soft recovery with negligible switching losses and low conduction loss. Its dynamic performance is characterized by trr = 15 ns (typ.) at IF = 1 A, dIF/dt = −100 A/µs, VR = 30 V, and IRM = 3–4 A under harsh conditions (IF = 2 A, dIF/dt = −200 A/µs, VR = 160 V, Tj = 125 °C).

The device operates up to 175 °C junction temperature with Rth(j-l) = 30 °C/W and supports surge current up to 75 A (10 ms, sinusoidal). Its low VF (0.70 V typ. @ 150 °C/2 A) and minimal QRR reduce conduction and reverse recovery losses in high-efficiency 50–500 kHz DC-DC stages.

Key Specifications

Pinout & Package

STTH2R02U is housed in an SMB (DO-214AA) surface-mount package with two terminals: anode and cathode. The package meets UL94 V0 flammability rating and is lead-free and ECOPACK®2 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2R02A and MUR220, STTH2R02U delivers superior high-temperature VF stability and faster recovery in SMB form factor - making it optimal for compact, high-efficiency auxiliary supplies and flyback snubbers requiring consistent performance up to 125 °C ambient.

Availability

STTH2R02U is available at Aetrix Electronics and suitable for LED lighting drivers, auxiliary power supplies, and flyback snubber circuits requiring stable component supply and long-term industrial lifecycle support.

Supply support for STTH2R02U 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, MCU, and sensor solutions for industrial, automotive, and consumer markets.

The STTH series targets high-efficiency, high-reliability power conversion - specifically engineered for ultrafast recovery in SMPS, inverters, and protection circuits where low VF and soft switching are critical.

FAQ

What is the maximum allowable case temperature for STTH2R02U in continuous operation?

The STTH2R02U has no defined maximum case temperature; instead, its absolute limit is junction temperature (Tj) ≤ 175 °C. With Rth(j-l) = 30 °C/W and IF(AV) = 2 A, typical power dissipation is ~1.5 W, so maintaining lead temperature ≤ 115 °C ensures safe operation. PCB copper area and airflow directly impact achievable case temperature.

Does STTH2R02U support reflow soldering per JEDEC J-STD-020?

Yes - STTH2R02U is qualified for lead-free reflow per JEDEC J-STD-020D, with peak temperature up to 260 °C for 30 seconds. Its SMB package uses matte tin plating and complies with IPC/JEDEC standards for thermal shock resistance and intermetallic formation control.

How does the 15 ns trr value translate to practical switching frequency limits?

A 15 ns trr supports reliable operation up to ~500 kHz in DCM flyback and up to ~300 kHz in CCM converters, assuming adequate dead time (≥3×trr) and controlled dIF/dt. At higher frequencies, trr increases slightly with temperature - e.g., +25% at 125 °C - so design margins must account for worst-case thermal conditions.

Is STTH2R02U pin-compatible with other SMB-packaged 2 A diodes like BYV26E or UF202?

No - while all are SMB diodes, STTH2R02U has anode-cathode orientation matching standard SMB polarity (cathode band on left per JEDEC DO-214AA), but BYV26E and UF202 differ in thermal pad layout and internal die structure. Mechanical fit is confirmed, but electrical behavior (especially trr and VF temperature coefficient) is not interchangeable without circuit validation.