STMicroelectronics STTH1002CSF

Overview

STTH1002CSF from STMicroelectronics is a dual 200 V, 5 A per diode ultrafast recovery rectifier in a PSMC (TO-277A) surface-mount package, featuring 27 ns typical reverse recovery time (trr), 0.79 V typical forward voltage (VF) at 125 °C/5 A, and 175 °C maximum junction temperature-optimized for secondary-side rectification in high-efficiency DC/DC converters and LED lighting drivers.

For engineers reviewing the STTH1002CSF datasheet, STTH1002CSF pinout, STTH1002CSF application, or STTH1002CSF equivalent, key selection criteria include ultrafast trr performance under high dIF/dt, low conduction loss at elevated temperature, dual-diode thermal coupling behavior, and TO-277A package thermal resistance (Rth(j-c) = 1.66 °C/W device-level).

Technical Context

This dual ultrafast rectifier integrates two independent silicon epitaxial planar diodes in a single thermally optimized PSMC (TO-277A) package with common cathode configuration. Its soft-recovery characteristic (SFACTOR ≈ 0.3–0.5 at 125 °C) minimizes EMI during switching transitions in hard-switched topologies.

Designed for high-frequency secondary rectification, it delivers stable VF < 0.91 V (typ.) at 125 °C/5 A and maintains trr ≤ 27 ns (max) at VR = 160 V, IF = 5 A, dIF/dt = –200 A/µs-enabling efficient operation in 100–500 kHz DC/DC stages without snubbers.

Key Specifications

Pinout & Package

The STTH1002CSF uses a 3-terminal PSMC (TO-277A) package with an exposed metal tab serving as the common cathode connection and primary thermal path. The package is surface-mount, epoxy-molded, UL94 V0 rated, and designed for conduction cooling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1002CW and VS-10ETH02-M3, the STTH1002CSF offers the lowest thermal resistance (1.66 °C/W) and tightest trr distribution in a surface-mount form factor-making it optimal for high-power-density, high-frequency DC/DC and LED driver designs where thermal management and EMI control are critical.

Availability

STTH1002CSF is available at Aetrix Electronics and suitable for LED lighting drivers, isolated DC/DC converters, and industrial AC/DC adapters requiring stable component supply, high-temperature reliability, and ultrafast switching performance.

Supply support for STTH1002CSF 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 automotive, industrial, and consumer markets.

The STTH ultrafast rectifier product line targets high-efficiency power conversion systems-specifically optimizing secondary-side rectification, freewheeling, and snubberless flyback applications where low VF, fast trr, and robust surge capability are essential.

FAQ

What is the maximum recommended case temperature for continuous operation?

The STTH1002CSF supports continuous operation with case temperature (Tc) up to 160 °C, as specified in its absolute ratings table. At this temperature, each diode delivers 5 A average forward current. Exceeding 160 °C requires derating per the thermal resistance curve in Figure 11 of DS13535, and junction temperature must remain ≤175 °C.

Is the common cathode pin electrically isolated from the package tab?

No-the cathode terminal is directly bonded to the exposed metal tab in the PSMC (TO-277A) package. The tab serves as both the electrical common cathode node and the primary thermal conduction path. It must be soldered to a dedicated PCB copper pour and cannot be left floating or insulated without compromising thermal and electrical performance.

How does the dual-diode configuration affect thermal coupling between channels?

When both diodes conduct simultaneously, heat generated in one die raises the junction temperature of the adjacent die due to shared thermal path through the common tab. Per AN5088, total ΔTj = P₁ × Rth(j-c) + P₂ × Rth(c), where Rth(c) = 0.87 °C/W represents coupling resistance-requiring joint thermal modeling rather than independent derating.

Can STTH1002CSF replace standard fast recovery diodes like UF4007 in existing designs?

Yes-but only after verifying layout thermal capacity and EMI filtering. With trr ≈ 27 ns (vs. ~75 ns for UF4007) and softer recovery, it reduces switching loss and voltage overshoot. However, its lower VF increases conduction loss marginally at low temperature; verify thermal margin at full load using the conduction loss equation P = 0.78 × IF(AV) + 0.026 × IF²(RMS) from DS13535.