STMicroelectronics STPS10170CG-TR

Overview

STPS10170CG-TR from STMicroelectronics is a dual-center-tab high-voltage Schottky rectifier in D²PAK package, rated for 170 V repetitive peak reverse voltage, 10 A total average forward current (5 A per diode), and 175 °C maximum junction temperature. It delivers low forward voltage drop (0.69 V typ. at 5 A, 125 °C) with low leakage current (10 µA max. at 25 °C), and is specified for avalanche energy handling (220 W, 10 µs pulse). It is used in high-frequency switched-mode power supplies requiring efficient conduction and thermal robustness.

For engineers reviewing the STPS10170CG-TR datasheet, STPS10170CG-TR pinout, STPS10170CG-TR application, or STPS10170CG-TR equivalent, key selection criteria include per-diode thermal resistance (4 °C/W junction-to-case), avalanche capability under transient conditions, dual-diode configuration with shared center tab, and ECOPACK®2 compliance for environmental requirements.

Technical Context

This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode tab, enabling parallel or interleaved operation in bridge or dual-output topologies. Its design emphasizes high-temperature reliability (Tj(max) = 175 °C) and low conduction loss via optimized metal-semiconductor interface, achieving VF = 0.69 V (typ.) at 5 A and 125 °C.

Thermal performance is defined by Rth(j-c) = 4 °C/W per diode and Rth(c) = 0.7 °C/W coupling between diodes, supporting stable operation under simultaneous conduction. Avalanche rating (PARM = 220 W, tp = 10 µs) is validated per AN1768/AN2025, confirming ruggedness against inductive switching transients.

Key Specifications

Pinout & Package

The STPS10170CG-TR uses a D²PAK (TO-263AB) surface-mount package with three terminals: two anodes (A1, A2) and one common cathode (K) on the exposed metal tab. The center-tab construction provides low-inductance, high-current paths and direct thermal conduction to the PCB.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STPS10170CB-TR, the STPS10170CG-TR offers superior thermal performance (Rth(j-c) = 4 °C/W vs. 5.5 °C/W) and higher power handling in D²PAK, while VS-10ETH02-M3 lacks dual-diode integration and avalanche capability-making it unsuitable for compact, high-reliability dual-output SMPS designs.

Availability

STPS10170CG-TR is available at Aetrix Electronics and suitable for AC-DC adapters, server power supplies, industrial DC-DC converters, and telecom rectifier modules requiring stable component supply, long-term lifecycle support, and consistent thermal performance across production batches.

Supply support for STPS10170CG-TR 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, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

The STPS10170CG-TR belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in switched-mode power supplies operating above 100 kHz.

FAQ

What is the maximum continuous power dissipation per diode at Tc = 155 °C?

At Tc = 155 °C and δ = 0.5 square wave, the maximum average forward current per diode is 5 A. Using the conduction loss equation P = 0.65 × IF(AV) + 0.02 × IF²(RMS), and assuming IF(RMS) ≈ 7.07 A for δ = 0.5, calculated dissipation is approximately 3.25 W + 1.0 W = 4.25 W per diode. This aligns with Figure 1, which shows PF(AV) ≈ 4.3 W at 5 A and δ = 0.5.

Can STPS10170CG-TR be used in a center-tap transformer full-wave rectifier?

Yes - its dual-anode, common-cathode configuration is ideal for center-tap transformer full-wave rectification. Anode 1 and Anode 2 connect to opposite ends of the center-tapped secondary winding, while the tab (cathode) serves as the positive output rail. This eliminates the need for two separate diodes and ensures matched thermal and electrical characteristics between both legs.

Is the D²PAK tab electrically isolated from the anodes?

No - the exposed metal tab is the common cathode (K), electrically connected to both internal Schottky junction cathodes. It is not isolated and must be treated as a live output node. PCB layout must ensure adequate creepage/clearance from other traces, and the tab must be soldered to a dedicated cathode copper pour-not to ground or chassis unless the system design explicitly references the output to chassis.

Does STPS10170CG-TR require derating for operation above 125 °C junction temperature?

While Tj(max) is rated to 175 °C, the device does not require *electrical* derating above 125 °C - VF and IR values are specified up to 175 °C. However, thermal design must ensure dPtot/dTj < 1/Rth(j-a) to avoid thermal runaway, per Note 2 in Table 2. This means ambient temperature, heatsinking, and airflow must be evaluated using Rth(j-c) = 4 °C/W and Rth(c) = 0.7 °C/W to maintain safe steady-state Tj.