STMicroelectronics STTH1R02RL

Overview

STTH1R02RL from STMicroelectronics is a 200 V, 1.5 A ultrafast recovery rectifier diode in DO-41 package, featuring 15 ns typical reverse recovery time (trr), 0.70–0.85 V forward voltage drop at 100–150 °C, and 175 °C maximum junction temperature - optimized for flyback diodes and auxiliary power supplies in high-frequency SMPS.

For engineers reviewing the STTH1R02RL datasheet, STTH1R02RL pinout, STTH1R02RL application, or STTH1R02RL equivalent, key selection criteria include trr < 20 ns at 125 °C, VF ≤ 0.85 V @ IF = 1.5 A / Tj = 150 °C, thermal resistance Rth(j-l) = 45 °C/W (DO-41), and ECOPACK®2 compliance for lead-free assembly.

Technical Context

This ultrafast diode uses ST's planar platinum-doped silicon technology to achieve low QRR and minimal tail current, enabling efficient operation in hard-switched topologies. Its 200 V VRRM rating and 60 A IFSM surge capability support robustness in transient-prone auxiliary rails.

The device exhibits strong temperature stability: VF decreases with rising junction temperature (0.70 V typ. @ 150 °C), while trr increases only moderately (≤30 ns max @ 25 °C, dIF/dt = –50 A/µs), ensuring predictable timing behavior across industrial temperature ranges.

Key Specifications

Pinout & Package

STTH1R02RL is supplied in DO-41 axial-leaded package (glass-passivated, epoxy-encapsulated, UL94 V0 compliant), with cathode indicated by band marking. Lead length is specified as 10 mm for thermal resistance characterization.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1L06U and ES1J-E3/5AT, STTH1R02RL delivers superior thermal performance (Rth(j-l) = 45 °C/W vs. >60 °C/W for SMA/SMB), tighter trr control at high dIF/dt, and optimal VF balance for 1.5 A, 200 V auxiliary applications - making it the preferred choice for space-constrained, high-efficiency SMPS.

Availability

STTH1R02RL is available at Aetrix Electronics and suitable for LED lighting drivers, auxiliary power supplies, polarity protection circuits, and freewheeling paths in industrial inverters requiring stable component supply and long-term manufacturability.

Supply support for STTH1R02RL 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 automotive, industrial, and consumer markets.

STTH1R02RL belongs to ST's ultrafast recovery diode product line, engineered specifically for high-efficiency, high-frequency switching power conversion - emphasizing low QRR, stable VF over temperature, and rugged packaging for industrial reliability.

FAQ

What is the maximum allowable lead temperature during soldering for STTH1R02RL?

The DO-41 package supports wave soldering per J-STD-020, with peak lead temperature not exceeding 260 °C for ≤10 seconds. Reflow profiles must comply with ST's recommended thermal profile (DS4743 Rev 4, Section 4.2), avoiding sustained exposure above 230 °C to prevent epoxy degradation or internal bond lift.

Does STTH1R02RL require a heatsink in typical 1.5 A applications?

No external heatsink is required when mounted on standard FR4 PCB with ≥10 mm lead length and ≥1 cm² copper pour per lead. At 1.5 A and 150 °C junction temperature, self-heating remains within limits (ΔT ≈ 67.5 °C rise) assuming Rth(j-a) ≈ 45 °C/W - verified via thermal simulation using ST's AN5088 guidelines.

How does trr vary with junction temperature for STTH1R02RL?

trr increases with junction temperature: typical values are 15 ns at 25 °C, 20 ns at 125 °C, and ≤30 ns at 150 °C (per Figure 10, DS4743 Rev 4). This positive temperature coefficient is inherent to Pt-doped silicon and must be accounted for in worst-case timing analysis of snubber networks.

Can STTH1R02RL replace a standard 1N4007 in a 24 V power supply?

Yes, but only where ultrafast recovery is needed - e.g., in high-frequency flyback or resonant topologies. In linear or low-frequency transformer-rectifier supplies, the 1N4007 remains more cost-effective. STTH1R02RL offers no advantage in 50/60 Hz applications and may exhibit higher leakage at elevated temperatures.