STMicroelectronics STTH3R02QRL

Overview

STTH3R02QRL from STMicroelectronics is a 200 V, 3 A ultrafast recovery diode using platinum-doped planar technology, optimized for high-frequency switching in base drive and transistor circuits. It delivers low conduction losses (VF typ. 0.7 V at Tj=150 °C), negligible switching losses, and fast reverse recovery (trr typ. 16 ns at IF=1 A, dIF/dt=−100 A/µs), enabling use in low-voltage inverters and polarity protection.

For engineers reviewing the STTH3R02QRL datasheet, STTH3R02QRL pinout, STTH3R02QRL application, or STTH3R02QRL equivalent, key selection criteria include its DO-15 package thermal resistance (Rth(j-l) = 45 °C/W), 175 °C max junction temperature, and validated performance under high dIF/dt conditions up to 200 A/µs at 125 °C.

Technical Context

This diode employs ST's Pt-doped planar junction process to achieve low VF and tightly controlled trr across temperature. Its dynamic behavior is characterized by minimal IRM (4.5 A max at Tj=125 °C) and QRR < 60 nC under typical 160 V, 3 A recovery conditions.

Designed for unidirectional conduction in hard-switched topologies, it supports repetitive peak forward current of 110 A (tp=5 µs) and surge non-repetitive current of 75 A (tp=10 ms), with thermal design enabled by DO-15 lead-to-ambient impedance curves validated on FR4 PCBs.

Key Specifications

Pinout & Package

STTH3R02QRL is packaged in DO-15, a through-hole axial lead package with cathode band marking. The device has two terminals: anode and cathode, with no internal circuitry or control logic.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH3R02QRL, STTH3L02QRL trades faster conduction for slower recovery, while MBR320RLG eliminates recovery entirely but sacrifices 90% of blocking voltage-making STTH3R02QRL the sole choice for 200 V, high-dIF/dt, medium-frequency applications.

Availability

STTH3R02QRL is available at Aetrix Electronics and suitable for DC-DC converter output rectification, inverter freewheeling, and polarity protection requiring stable component supply and DO-15 through-hole compatibility.

Supply support for STTH3R02QRL 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 industrial, automotive, and consumer markets.

STTH3R02 belongs to ST's ultrafast recovery diode product line, engineered specifically for high-efficiency, high-frequency power conversion in industrial SMPS, motor drives, and renewable energy inverters.

FAQ

What is the maximum allowable soldering temperature for STTH3R02QRL?

The maximum lead temperature for soldering is 230 °C for 10 seconds at 4 mm from the case, per Table 2. Exceeding this risks internal bond wire damage or epoxy degradation. Use controlled thermal profiles and avoid localized hot-air rework above 220 °C.

Can STTH3R02QRL replace a standard PN junction rectifier in a 100 kHz flyback converter?

Yes-its 16 ns trr and low QRR reduce switching losses significantly versus standard rectifiers (e.g., 1N5408, trr > 2 µs). Measured efficiency gain is 1.2–1.8% at full load, provided layout minimizes stray inductance to avoid voltage overshoot beyond 200 V.

Is STTH3R02QRL qualified for automotive applications?

No-ST's official documentation explicitly states these devices are not designed or authorized for automotive, safety-critical, or aerospace use. They lack AEC-Q101 qualification and are rated only for industrial and general-purpose power applications.

How does Rth(j-l) = 45 °C/W translate to real-world thermal performance in a DO-15 footprint?

With 3 A average current and VF ≈ 0.85 V, power dissipation is ~2.55 W. At Rth(j-l) = 45 °C/W, junction-to-lead rise is ~115 °C. Assuming 50 °C ambient and 20 °C lead temperature rise to PCB copper, Tj reaches ~185 °C-exceeding rating. Derating to 2.2 A or adding thermal relief pads is required for sustained operation.