STMicroelectronics STTH1002CSFY

Overview

STTH1002CSFY from STMicroelectronics is an AEC-Q101-qualified dual ultrafast recovery rectifier diode in PSMC (TO-277A) package, rated for 200 V repetitive peak reverse voltage, 10 A total average forward current (2 × 5 A), and 27 ns typical reverse recovery time at 125 °C. It delivers low conduction loss (VF = 0.79 V typ. at 5 A, 125 °C) and supports automotive ECU reverse polarity protection and high-efficiency DC/DC secondary rectification.

For engineers reviewing the STTH1002CSFY datasheet, STTH1002CSFY pinout, STTH1002CSFY application, or STTH1002CSFY equivalent, key selection criteria include junction temperature capability up to 175 °C, surge current rating of 85 A (10 ms), thermal resistance (Rth(j-c) = 1.66 °C/W per device), and dual-diode configuration with independent terminals for freewheeling and synchronous rectifier topologies.

Technical Context

This dual ultrafast rectifier integrates two independent silicon epitaxial planar diodes in a single PSMC (TO-277A) thermally optimized package, enabling compact board layout for bidirectional or interleaved power stages. Each diode exhibits soft reverse recovery (SFACTOR ≈ 0.4–0.5 at 125 °C) and low QRR (≤ 200 nC at dIF/dt = 500 A/µs), minimizing EMI in high-frequency switching converters.

The device operates across -40 °C to +175 °C junction temperature range with guaranteed VRRM stability and low IR leakage (< 40 µA at 125 °C). Its Rth(j-c) of 2.45 °C/W per diode and 1.66 °C/W per device enables direct heatsink mounting via the exposed cathode tab, supporting high-power-density automotive and industrial designs without forced air cooling.

Key Specifications

Pinout & Package

STTH1002CSFY uses the PSMC (TO-277A) surface-mount package with an exposed cathode metal tab for thermal conduction and mechanical anchoring. The package features three terminals: Cathode 1 (K1), Anode 1 (A1), and shared Cathode 2 / Anode 2 (K2/A2) - confirmed by STMicroelectronics DS13536 Rev 1 Figure 12 and Table 5 mechanical outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH1002CWY and VS-10ETH02-M3, STTH1002CSFY uniquely combines AEC-Q101 qualification, 175 °C operation, and surface-mount PSMC packaging-enabling high-reliability, space-constrained automotive power conversion where thermal density and transient robustness are critical.

Availability

STTH1002CSFY is available at Aetrix Electronics and suitable for automotive ECU protection, DC/DC converter secondary rectification, and LED headlamp driver designs requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STTH1002CSFY 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 automotive, industrial, and consumer markets.

STTH1002CSFY belongs to ST's STTH ultrafast rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive environments where thermal resilience, surge immunity, and AEC-Q101 compliance are mandatory.

FAQ

What is the maximum allowable case temperature for continuous operation?

The STTH1002CSFY is rated for IF(AV) = 10 A at Tc = 160 °C per the Absolute Ratings table. Operation above this temperature requires derating per the thermal curves in DS13536 Figure 4 and Figure 11. At Tc = 160 °C, junction temperature remains within 175 °C limit assuming Rth(j-c) = 1.66 °C/W and 10 A conduction loss of ~7.9 W.

How is the dual-diode configuration wired in a full-wave bridge?

STTH1002CSFY cannot form a complete bridge alone-it contains two independent diodes with separate anodes and a shared cathode-anode terminal (K2/A2). For full-wave rectification, one diode serves as positive half-cycle path (A1→K1), the other as negative half-cycle path (A2→K2), requiring external connection to AC input and load return. Layout must isolate A1 and K2 nodes.

Does STTH1002CSFY support paralleling for higher current?

No-STTH1002CSFY is not characterized or recommended for paralleling. Its VF matching between diodes is unspecified, and thermal coupling via shared case may cause current imbalance. For >10 A, ST recommends STTH1502CSFY (15 A dual) or discrete single-diode solutions with matched VF and independent thermal paths.

Is the PSMC (TO-277A) package lead-free and RoHS-compliant?

Yes-STTH1002CSFY is ECOPACK2-compliant, meeting RoHS Directive 2011/65/EU and EU REACH Regulation (EC) No. 1907/2006. The package uses lead-free matte tin plating on terminals and halogen-free epoxy molding compound, with full material declarations available in ST's ECOPACK documentation portal.