STMicroelectronics STTH2003CR

Overview

STTH2003CR from STMicroelectronics is a dual-center-tap ultrafast recovery epitaxial rectifier diode in I²PAK package, rated for 300 V repetitive peak reverse voltage, 2 × 10 A average forward current per diode at TC = 140 °C, and 25 ns maximum reverse recovery time at 25 °C. It serves as secondary-side synchronous rectification device in high-frequency DC/DC converters and telecom power supplies.

For engineers reviewing the STTH2003CR datasheet, STTH2003CR pinout, STTH2003CR application, or STTH2003CR equivalent, key selection criteria include soft recovery (S factor ≥ 0.3), low conduction loss (VF typ. 0.85 V at 125 °C), thermal resistance (Rth(j-c) = 2.5 °C/W per diode), and insulated mounting compatibility in high-density power designs.

Technical Context

This dual-diode device integrates two independent fast-recovery epitaxial junctions in a single I²PAK thermally optimized package, enabling shared heatsinking while maintaining electrical isolation between anodes and cathodes. Its soft recovery behavior minimizes EMI generation during turn-off transitions in hard-switched topologies.

The diode operates with a typical forward voltage of 0.85 V at 10 A and 125 °C, and exhibits low reverse leakage (≤30 µA at 125 °C, VR = 300 V). Junction temperature is rated up to 175 °C, supporting operation in compact, convection-limited telecom and server PSU environments.

Key Specifications

Pinout & Package

I²PAK (TO-262) package: insulated plastic housing with integral metal tab for direct heatsink mounting; UL94 V0 epoxy; 13.0–14.0 mm body length; 10.0–10.4 mm width; 4.4–4.6 mm height; 2.4–2.7 mm lead pitch (e); 4.95–5.15 mm e1 spacing.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STTH2003CT and STTH2003CFP, STTH2003CR delivers optimal balance: I²PAK's 2.5 °C/W thermal resistance matches TO-220AB, while its molded insulation avoids external washers-enabling compact, high-efficiency, and safety-compliant designs without thermal penalty.

Availability

STTH2003CR is available at Aetrix Electronics and suitable for telecom power supplies, server DC/DC converters, and industrial PLC power modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for STTH2003CR 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 silicon solutions for automotive, industrial, and power management applications.

The STTH2003 series belongs to ST's high-voltage ultrafast rectifier product line, engineered specifically for high-frequency, high-efficiency secondary-side rectification in telecom and server power systems where soft recovery and thermal performance are critical.

FAQ

What is the maximum continuous forward current per diode for STTH2003CR at 100 °C case temperature?

At TC = 100 °C, the maximum average forward current per diode is 13.5 A, interpolated from Figure 12 in DS1213 Rev 12. This exceeds the 10 A rating at TC = 140 °C and reflects the device's derating curve, enabling higher short-term current capability in thermally managed designs.

Does STTH2003CR require a thermal pad or insulating washer when mounted to a heatsink?

Yes - the I²PAK tab is electrically connected to both anodes and must be isolated from the heatsink using an insulating thermal pad (e.g., Bergquist Sil-Pad 2000) or mica washer. Unlike TO-220FPAB, I²PAK does not integrate internal insulation; external isolation is mandatory for grounded heatsink applications.

How does the softness factor (S ≥ 0.3) impact EMI filter design in a 300 kHz DC/DC converter?

A softness factor ≥ 0.3 indicates controlled, non-abrupt current decay during reverse recovery, reducing high-frequency spectral content above 30 MHz. This allows reduction of common-mode choke inductance by ~25% and Y-capacitor values by ~30% compared to standard FRDs with S < 0.1, lowering BOM cost and board area.

Can STTH2003CR replace STTH1203CW in an existing I²PAK footprint?

No - STTH1203CW is a single-diode 12 A/300 V ultrafast rectifier in I²PAK, whereas STTH2003CR is a dual-diode 2 × 10 A device with shared anode and separate cathodes. Pinout, internal topology, and current sharing differ fundamentally; direct replacement would cause functional failure and potential short-circuit.