STMicroelectronics STTH20R04G-TR

Overview

STTH20R04G-TR from STMicroelectronics is an ultrafast recovery power rectifier optimized for energy recovery clamping in plasma display panel (PDP) power supplies, featuring 400 V repetitive peak reverse voltage, 20 A average forward current, 18 ns typical reverse recovery time, 1.15 V typical forward voltage at 125 °C, and TO-220FPAC insulated package with 2000 VRMS isolation.

For engineers reviewing the STTH20R04G-TR datasheet, STTH20R04G-TR pinout, STTH20R04G-TR application, or STTH20R04G-TR equivalent, key selection criteria include ultrafast trr performance under high dIF/dt, low conduction loss at elevated junction temperature, insulating package suitability for high-voltage PDP clamp stages, and ECOPACK®2 compliance for environmental requirements.

Technical Context

This device employs a planar epitaxial silicon structure engineered for soft reverse recovery and minimal stored charge (Qrr), enabling efficient energy recycling in resonant PDP power architectures. Its 175 °C maximum junction temperature and 5 °C/W thermal resistance (junction-to-case) support sustained operation under high-power transient loads.

The TO-220FPAC package integrates reinforced electrical insulation (2000 VRMS) between the cathode tab and mounting surface, eliminating need for additional insulating hardware in high-voltage clamp circuits while maintaining thermal path integrity via direct case conduction.

Key Specifications

Pinout & Package

STTH20R04G-TR uses the TO-220FPAC package: insulated plastic housing with electrically isolated metal tab (cathode), 3-pin configuration, 2000 VRMS isolation rating, and screw-mount compatible footprint (recommended torque: 0.55 N·m).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH20L06D and IXYS MUR2060CT, STTH20R04G-TR uniquely combines 400 V rating, sub-20 ns trr, and integrated 2000 VRMS insulation-enabling simplified, space-efficient, and thermally optimized PDP clamp designs without external isolation hardware.

Availability

STTH20R04G-TR is available at Aetrix Electronics and suitable for plasma display panel (PDP) power supplies, industrial AC-DC converters, uninterruptible power supplies (UPS), and motor drive snubber circuits requiring stable component supply, high-reliability ultrafast rectification, and certified insulating packaging.

Supply support for STTH20R04G-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, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

This device belongs to ST's high-efficiency power rectifier product line, specifically developed for energy recovery and clamping functions in high-frequency, high-reliability display and industrial power systems.

FAQ

What is the maximum junction temperature and how does it affect thermal design?

The STTH20R04G-TR has a maximum junction temperature of 175 °C. This allows operation at higher ambient temperatures or with reduced heatsinking in PDP power supplies. Its 5 °C/W junction-to-case thermal resistance means a 100 W power dissipation would produce a 500 °C rise-so actual design must limit power loss using its low VF and trr to stay within safe thermal margins.

Is the TO-220FPAC package truly isolated, and what is the test condition for 2000 VRMS?

Yes-the TO-220FPAC package provides guaranteed 2000 VRMS insulation between the cathode tab and mounting surface, tested per IEC 60747-5-1 with sine wave at 50/60 Hz for 1 minute. This eliminates need for insulating hardware in high-voltage clamp circuits, simplifying mechanical design and improving thermal contact reliability.

How does the softness factor of 0.3 improve system-level performance?

A softness factor of 0.3 indicates controlled, gradual reverse recovery current decay-reducing di/dt-induced voltage overshoot and high-frequency ringing. In PDP energy recovery circuits, this directly lowers EMI emissions, minimizes stress on clamp capacitors and IGBTs, and avoids false triggering of overvoltage protection circuits.

Can STTH20R04G-TR replace STTH20R04FP in existing designs?

Yes-STTH20R04G-TR and STTH20R04FP share identical electrical specifications and TO-220FPAC package dimensions. The "-TR" suffix denotes tape-and-reel packaging (1000 pcs), while "FP" is tube-packaged (50 pcs); both have same insulated construction, thermal ratings, and pinout-making them functionally and mechanically interchangeable.