STMicroelectronics STTH1R02

Overview

STTH1R02 from STMicroelectronics is a 200 V, 1.5 A ultrafast recovery diode using platinum-doped planar technology, optimized for high-frequency switching in base drive and transistor circuits. It delivers low forward voltage (0.7 V typ. at 25 °C), 15 ns typical reverse recovery time, and 175 °C maximum junction temperature - enabling efficient flyback and polarity protection in auxiliary power supplies.

For engineers reviewing the STTH1R02 datasheet, STTH1R02 pinout, STTH1R02 application, or STTH1R02 equivalent, key selection criteria include ultrafast trr performance under high dIF/dt conditions, thermal robustness up to 175 °C, conduction loss modeling via P = 0.68×IF(AV) + 0.08×IF²(RMS), and package-specific thermal resistance (e.g., 30 °C/W for SMA).

Technical Context

The STTH1R02 employs Pt-doped planar junction technology to achieve ultrafast soft recovery with minimal reverse recovery charge (QRR) and negligible tail current. Its dynamic behavior is characterized by trr = 15 ns (at IF = 1.5 A, dIF/dt = –200 A/µs, VR = 160 V, Tj = 125 °C) and IRM = 3–4 A under same conditions.

Static performance includes VF = 0.70–0.80 V (at IF = 1.5 A, Tj = 150 °C) and IR < 2 µA at 125 °C, supporting stable operation in thermally demanding environments. Package variants (SMA, SMB, DO-41, DO-15) offer distinct Rth(j-l) values - 30 °C/W for SMA/SMB and 45 °C/W for DO-41/DO-15 - directly impacting power dissipation limits.

Key Specifications

Pinout & Package

STTH1R02 is offered in four discrete through-hole and surface-mount packages: SMA (DO-214AC), SMB (DO-214AA), DO-41, and DO-15. All are two-terminal devices with anode and cathode terminals only.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MUR120 and VS-1EWH02-M3, STTH1R02 uniquely balances 1.5 A current capability, 15 ns trr, and 0.7 V VF across four package types - making it optimal for thermally dense, high-frequency auxiliary supplies and LED drivers requiring both performance headroom and assembly flexibility.

Availability

STTH1R02 is available at Aetrix Electronics and suitable for LED lighting drivers, auxiliary power supplies, flyback diode protection, and polarity protection circuits requiring stable component supply across industrial, medical, and consumer electronics programs.

Supply support for STTH1R02 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, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STTH ultrafast diode product line targets high-efficiency, high-frequency power conversion systems - specifically engineered to replace standard fast and Schottky diodes in SMPS, motor drives, and lighting where low QRR and soft recovery are critical.

FAQ

What is the maximum allowable surge current for STTH1R02?

The STTH1R02 supports a non-repetitive surge forward current (IFSM) of 60 A for 10 ms (sinusoidal waveform). This rating applies across all package variants and is validated at Tj = 25 °C. Derating is required above 25 °C per the datasheet's IFSM vs. Tj curve, and repeated surges must allow full thermal recovery between events.

How does STTH1R02's thermal resistance vary between SMA and DO-15 packages?

STTH1R02's junction-to-lead thermal resistance (Rth(j-l)) is 30 °C/W for SMA and SMB packages, and 45 °C/W for DO-41 and DO-15. This difference reflects larger lead mass and thermal path geometry in DO-style packages. For identical power dissipation, DO-15 will run ~15 °C hotter at the junction than SMA under identical mounting conditions.

Is STTH1R02 suitable for use in automotive applications?

STTH1R02 is not AEC-Q101 qualified and lacks automotive-specific qualification documentation. While its 175 °C Tj rating and robust construction support under-hood ambient temperatures, ST does not guarantee automotive-grade reliability or PPAP compliance. It may be used in non-safety-critical auxiliary functions (e.g., infotainment power rails) only after full system-level validation.

Does STTH1R02 have a soft recovery characteristic?

Yes - STTH1R02 exhibits soft recovery behavior due to its platinum-doped planar junction, resulting in low reverse recovery current (IRM = 3–4 A) and minimal voltage overshoot during turn-off. This is confirmed by measured trr waveforms showing absence of sharp current zero-crossing and reduced ringing in test circuits with 200 A/µs dIF/dt.