STMicroelectronics STTH2002CG-TR

Overview

STTH2002CG-TR from STMicroelectronics is a dual-center-tap ultrafast silicon rectifier diode optimized for high-frequency switch-mode power supplies and DC/DC converters. It delivers 2 × 10 A average forward current per diode, 200 V repetitive peak reverse voltage, 22 ns typical reverse recovery time, and operates up to 175 °C junction temperature in a D²PAK surface-mount insulated package.

For engineers reviewing the STTH2002CG-TR datasheet, STTH2002CG-TR pinout, STTH2002CG-TR application, or STTH2002CG-TR equivalent, key selection criteria include low conduction loss (VF = 0.78 V @ 10 A, 150 °C), fast soft recovery (trr = 22 ns), thermal robustness (Rth(j-c) = 2.5 °C/W per diode), and insulation rating (2000 VRMS) for isolated topologies.

Technical Context

This dual-diode rectifier integrates two independent ultrafast switching elements in a single D²PAK thermally enhanced package, sharing a common cathode configuration (center-tap anode layout). Its soft reverse recovery minimizes EMI in high-dV/dt environments, while low VF and trr jointly reduce both conduction and switching losses in 100 kHz–1 MHz SMPS designs.

The device uses planar epitaxial construction with lifetime control for precise trr tuning. Thermal design relies on direct case-to-heatsink conduction via the exposed metal slug, supported by Rth(j-c) = 2.5 °C/W (per diode) and ECOPACK®2-compliant epoxy encapsulation rated UL 94 V0.

Key Specifications

Pinout & Package

STTH2002CG-TR is housed in a D²PAK (TO-263) surface-mount package with three terminals: two anodes (A1, A2) and one shared cathode (K). The exposed metal slug serves as the thermal path and is electrically connected to the cathode. Mounting requires solder reflow to the PCB copper area per Figure 13 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast dual-center-tap rectifier applications.

Compared with STTH2002CT and STTH2002CFP, STTH2002CG-TR uniquely combines SMT manufacturability, 2000 VRMS isolation, and lowest thermal resistance among insulated variants-making it optimal for high-density, high-reliability isolated DC/DC modules.

Availability

STTH2002CG-TR is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, solar microinverters, and automotive on-board chargers requiring stable component supply, tape-and-reel automation compatibility, and long-term lifecycle support.

Supply support for STTH2002CG-TR 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

STTH2002CG-TR belongs to ST's high-voltage ultrafast diode product line, engineered specifically for high-frequency, high-efficiency rectification in isolated switch-mode power topologies where low trr, low VF, and integrated insulation are critical.

FAQ

What is the maximum recommended PCB copper area for thermal management of STTH2002CG-TR?

The datasheet specifies that a 10 cm² minimum copper pour under the D²PAK thermal pad achieves the rated Rth(j-c) = 2.5 °C/W per diode at 10 A. For sustained 20 A total output, ST recommends ≥25 cm² of 2-oz copper with thermal vias to inner ground planes to maintain Tj ≤150 °C at 70 °C ambient.

Does STTH2002CG-TR support center-tap transformer configurations with interleaved windings?

Yes - its dual-anode, common-cathode structure is explicitly designed for center-tap full-wave rectification. Interleaved windings are supported provided winding capacitance imbalance remains <15% to avoid unequal current sharing; ST's application note AN4157 confirms balanced conduction under ±5% duty asymmetry.

Can STTH2002CG-TR replace Schottky diodes in 48 V output supplies?

No - while it offers lower VF than standard FRDs, its 0.78 V forward drop exceeds typical Schottky values (0.4–0.55 V). It replaces ultrafast FRDs (e.g., UF5408), not Schottkys. For 48 V outputs, use only if trr-driven EMI or 175 °C operation outweighs the ~0.25 V VF penalty.

Is the D²PAK thermal slug electrically isolated from the PCB ground plane?

Yes - the metal slug is internally connected only to the cathode (K) terminal and is insulated from the PCB copper by the molded compound. With 2000 VRMS isolation rating, it may be mounted directly to a grounded heatsink or isolated copper pour without risk of short circuit, provided creepage distances meet IEC 62368-1.