STMicroelectronics STTH20004TV1

Overview

STTH20004TV1 from STMicroelectronics is a dual ultrafast high-voltage rectifier diode in an insulated ISOTOP package, rated for 400 V repetitive peak reverse voltage and 120 A average forward current per diode at Tc = 55 °C, with 60 ns max reverse recovery time and 0.83 V typical forward voltage at 150 °C - deployed as output rectification in industrial switching power supplies and welding equipment.

For engineers reviewing the STTH20004TV1 datasheet, STTH20004TV1 pinout, STTH20004TV1 application, or STTH20004TV1 equivalent, key selection criteria include its dual-diode configuration, 2500 V_rms electrical insulation, low thermal resistance (0.60 °C/W per diode), and suitability for high-current, high-dV/dt rectification where conduction and switching loss reduction is critical.

Technical Context

The STTH20004TV1 integrates two independent ultrafast silicon rectifiers in a single electrically insulated ISOTOP housing, enabling parallel or independent use in dual-output or interleaved topologies. Each diode exhibits a soft-recovery S-factor of 0.4 and supports surge currents up to 900 A (10 ms, sinusoidal).

Its thermal design relies on conduction cooling via the case, with junction-to-case resistance of 0.60 °C/W per diode and coupling resistance of 0.10 °C/W between diodes. Dynamic performance is characterized under controlled dI_F/dt conditions (up to 200 A/µs) and VR = 200 V, delivering consistent trr ≤ 60 ns at Tj = 125 °C.

Key Specifications

Pinout & Package

The STTH20004TV1 uses the ISOTOP package: a 4-terminal, insulated, ceramic-epoxy power module with metal baseplate for direct heatsink mounting. Terminals are arranged as K1, A1, K2, A2 (cathode-anode pairs for each diode), with electrical isolation between terminals and baseplate.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBR2045CT and VS-25CPH04, the STTH20004TV1 uniquely delivers dual 400 V ultrafast rectification with integrated 2500 V_rms insulation and 0.60 °C/W thermal resistance - eliminating external isolation components and enabling higher power density in industrial 200–400 V systems.

Availability

STTH20004TV1 is available at Aetrix Electronics and suitable for industrial switching power supplies, resistance welding inverters, and laser power supplies requiring stable component supply, long-lifecycle support, and certified ECOPACK®2 compliance.

Supply support for STTH20004TV1 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.

The STTH series targets high-reliability industrial rectification, emphasizing ultrafast recovery, thermal robustness, and system-level insulation - specifically engineered for demanding power conversion in welding, UPS, and high-power SMPS.

FAQ

What is the maximum junction temperature and how is it enforced?

The STTH20004TV1 has a maximum operating junction temperature of 150 °C, verified per absolute ratings table. Thermal design must ensure junction temperature stays below this limit using the specified Rth(j-c) = 0.60 °C/W per diode, measured with proper mounting torque and thermal interface material on the ISOTOP baseplate.

Can both diodes be used simultaneously without derating?

Yes - the datasheet provides explicit thermal coupling data (Rth(c) = 0.10 °C/W) and conduction loss equations for simultaneous operation. When both diodes conduct 100 A average current, total power dissipation is calculated as sum of individual losses plus coupling term: ΔTj = P1×0.60 + P2×0.10 + P2×0.60.

Is the ISOTOP package compatible with standard heatsink mounting practices?

Yes - the ISOTOP package uses a flat, metallized baseplate designed for direct bolt-down to heatsinks using the included M4 screws and washers. Mounting torque must be 0.7–0.9 N·m; thermal interface material with ≤0.1 °C·in²/W resistance is recommended to achieve rated Rth(j-c).

Does the 2500 V_rms insulation rating apply between all terminals and the case?

Yes - the 2500 V_rms isolation is specified between any terminal (K1, A1, K2, A2) and the metal baseplate, as confirmed in the Features section and validated per IEC 60747-5-2. Capacitance to case is 189 pF, supporting high-frequency noise filtering in isolated topologies.