STMicroelectronics STTH1R02QRL

Overview

STTH1R02QRL from STMicroelectronics is a 200 V, 1.5 A ultrafast recovery rectifier diode in DO-15 package, fabricated using platinum-doped planar technology for low conduction and switching losses. It delivers typ. 0.70 V forward voltage at 150 °C and 1.5 A, 15 ns reverse recovery time at 125 °C, and operates up to 175 °C junction temperature - ideal for flyback diodes and auxiliary power supplies in compact AC/DC converters.

For engineers reviewing the STTH1R02QRL datasheet, STTH1R02QRL pinout, STTH1R02QRL application, or STTH1R02QRL equivalent, key selection criteria include its 200 V repetitive peak reverse voltage, 1.5 A average forward current rating at TL = 135 °C, ultrafast trr (15–30 ns), low VF across temperature, and DO-15 thermal resistance (Rth(j-l) = 45 °C/W).

Technical Context

This ultrafast recovery diode employs platinum diffusion to precisely control carrier lifetime, enabling sharp reverse recovery with minimal tail current and low QRR. Its design targets high-frequency switching circuits where low dV/dt-induced noise and reduced EMI are critical - especially in flyback snubbers and base-drive clamping.

The device's 175 °C maximum junction temperature and ECOPACK®2-compliant DO-15 package support robust operation in thermally constrained industrial and lighting environments. Thermal performance is characterized by Rth(j-l) = 45 °C/W (lead length = 10 mm on infinite heatsink), enabling predictable derating without forced cooling.

Key Specifications

Pinout & Package

STTH1R02QRL is supplied in DO-15 axial-leaded package per JEDEC DO-204AL standard. The device has two terminals: anode and cathode, marked by cathode band on body. No internal circuitry or multi-pin functionality - strictly a two-terminal unidirectional rectifier.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1R02QRL, STTH1L06QRL trades faster recovery for higher voltage headroom, while ES1D-E3/54 offers SMT compatibility at reduced current and efficiency - making STTH1R02QRL optimal for cost-sensitive, through-hole, 1.5 A, 200 V ultrafast rectification.

Availability

STTH1R02QRL is available at Aetrix Electronics and suitable for LED lighting power supplies, auxiliary power supplies, flyback diode circuits, and polarity protection applications requiring stable component supply and long-term manufacturability.

Supply support for STTH1R02QRL 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 - specifically engineered for low-loss rectification in flyback, forward, and resonant converter topologies.

FAQ

What is the maximum allowable lead temperature during soldering for STTH1R02QRL?

The DO-15 package supports wave or hand soldering with peak lead temperature up to 260 °C for 10 seconds, per JEDEC J-STD-020. Exceeding this may degrade epoxy integrity or bond wire reliability. Preheating to 100–150 °C before soldering is recommended to minimize thermal shock.

Does STTH1R02QRL require a heatsink in typical 1.5 A operation?

No external heatsink is required at 1.5 A if PCB copper area provides ≥2 cm² per lead and ambient temperature remains ≤50 °C. With Rth(j-l) = 45 °C/W, junction-to-lead rise is 67.5 °C - resulting in ~118 °C Tj at 50 °C ambient, well within the 175 °C limit.

How does the platinum doping affect reverse recovery behavior?

Platinum doping controls minority carrier lifetime in the epitaxial layer, producing a controlled, abrupt reverse recovery with minimal tail current. This yields low QRR and IRM - critical for reducing EMI and improving efficiency in high-frequency flyback converters above 250 kHz.

Can STTH1R02QRL replace a standard PN junction rectifier like 1N4007?

No - STTH1R02QRL is not a drop-in replacement for 1N4007. While both are DO-15 diodes, the 1N4007 has 1000 V V_RRM but 2 µs t_rr, making it unsuitable for high-frequency switching. STTH1R02QRL's 200 V rating and 15 ns t_rr make it incompatible in high-voltage, low-frequency applications but superior in fast-switching roles.