STMicroelectronics STTH61R04TV1

Overview

STTH61R04TV1 from STMicroelectronics is an ultrafast recovery dual common-cathode diode in ISOTOP package, rated for 400 V repetitive peak reverse voltage, 30 A average forward current per diode at Tc = 80 °C, and 24 ns typical reverse recovery time at IF = 1 A, dIF/dt = −200 A/µs, VR = 30 V, Tj = 25 °C. It is engineered for high-frequency switching mode base drive and transistor circuits in industrial welding equipment.

For engineers reviewing the STTH61R04TV1 datasheet, STTH61R04TV1 pinout, STTH61R04TV1 application, or STTH61R04TV1 equivalent, key selection criteria include ultrafast trr (24–65 ns), low VF (0.95 V typ. at 30 A, Tj = 150 °C), insulated ISOTOP package (2500 VRMS isolation), dual-diode configuration, and high pulsed current capability (IFRM = 900 A).

Technical Context

This dual-diode device uses ST's planar platinum-doped silicon technology to achieve soft, ultrafast reverse recovery with a typical softness factor (S) of 0.4 at 30 A, 125 °C - critical for minimizing EMI and voltage overshoot in hard-switched topologies. Its low junction-to-case thermal resistance (1.5 °C/W per diode) supports high-power density layouts when mounted on heatsinks via the insulated ISOTOP baseplate.

The device operates up to 150 °C junction temperature and features low leakage (15 µA max at 25 °C, 150 µA at 125 °C) and low capacitance (45 pF), enabling stable performance in high-frequency rectification and freewheeling roles where dynamic losses dominate conduction losses.

Key Specifications

Pinout & Package

STTH61R04TV1 is housed in the ISOTOP package - a molded, electrically insulated, dual-diode module with metal baseplate for direct heatsink mounting. The package provides 2500 VRMS electrical isolation between terminals and case, UL94 V0 epoxy, and lead-free second-level interconnect (ECOPACK®).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultrafast dual-diode applications.

Compared with MUR1560E and VS-24CTQ045PbF, STTH61R04TV1 uniquely combines dual-diode integration, 400 V rating, ultrafast 24 ns trr, and built-in 2500 VRMS isolation - making it irreplaceable in space-constrained, high-reliability 400 V industrial welder and UPS designs requiring both performance and safety compliance.

Availability

STTH61R04TV1 is available at Aetrix Electronics and suitable for industrial welding power supplies, uninterruptible power systems, solar microinverters, and variable frequency motor drives requiring stable component supply and long-term production continuity.

Supply support for STTH61R04TV1 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, digital, and mixed-signal ICs, discrete devices, and MEMS sensors for industrial, automotive, and consumer markets.

The STTH series targets high-efficiency power conversion systems demanding ultrafast, soft-recovery diodes - specifically developed for switching-mode power supplies, welding equipment, UPS, and motor drives operating above 50 kHz.

FAQ

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

The STTH61R04TV1 has a maximum operating junction temperature of 150 °C. Its 1.5 °C/W per-diode junction-to-case thermal resistance requires a heatsink capable of maintaining case temperature ≤80 °C at 30 A average current. Derating curves in the datasheet show usable current drops to ~22 A at Tc = 100 °C, so thermal interface quality and airflow must be validated for each mechanical layout.

Is STTH61R04TV1 RoHS-compliant and what packaging options exist?

Yes, STTH61R04TV1 is RoHS-compliant and supplied in ECOPACK®-certified ISOTOP packages with lead-free second-level interconnect. It ships in tubes of 10 units (order code STTH61R04TV1), with marking "STTH61R04TV1" on the package body. No tape-and-reel or tray options are specified in the official documentation.

How does the softness factor impact circuit behavior in hard-switched topologies?

The softness factor (S = 0.4) quantifies the ratio of peak reverse recovery current (IRM) to its rate of decay. A lower S value indicates gentler current fall-off during turn-off, reducing voltage overshoot and electromagnetic interference in IGBT or MOSFET circuits driving inductive loads like welding transformers or motor windings - directly improving system reliability and simplifying snubber design.

Can STTH61R04TV1 be used in parallel configurations, and what layout considerations apply?

Yes - the dual-diode structure and matched characteristics allow internal parallel use of K1/A1 and K2/A2 paths. For external paralleling of multiple STTH61R04TV1 units, ensure symmetrical PCB trace lengths, identical thermal mounting pressure, and individual gate-drive loop balancing. The datasheet specifies total Rth(j-c) = 0.8 °C/W when both diodes operate simultaneously, confirming thermal co-design feasibility.