STMicroelectronics STPS10170CR

Overview

STPS10170CR from STMicroelectronics is a dual-center-tab high-voltage Schottky rectifier optimized for high-frequency switched-mode power supplies (SMPS), featuring 170 V repetitive peak reverse voltage, 2 × 5 A average forward current per diode at Tc = 155 °C, and a typical forward voltage drop of 0.69 V at 125 °C and 5 A - enabling efficient secondary-side rectification in telecom and industrial AC/DC adapters.

For engineers reviewing the STPS10170CR datasheet, STPS10170CR pinout, STPS10170CR application, or STPS10170CR equivalent, key selection criteria include junction-to-case thermal resistance (4 °C/W per diode), avalanche-rated pulse power (220 W at 10 µs), leakage current ≤10 mA at 125 °C/VRRM, and DPAK/D²PAK package compatibility with conduction-cooled PCB layouts.

Technical Context

This dual-diode Schottky rectifier integrates two independent anode-cathode junctions sharing a common center tab for thermal coupling and mechanical mounting. Each diode operates with independent forward conduction paths but shares thermal mass via the center tab, requiring joint thermal modeling using Rth(j-c) = 4 °C/W per diode and Rth(c) = 0.7 °C/W coupling term.

It delivers low VF–IR trade-off: 0.69 V typ. at 5 A/125 °C with IR ≤10 mA at same conditions, and supports repetitive avalanche operation up to 220 W (10 µs, Tj = 125 °C), validated per AN1768 and AN2025 for transient overvoltage robustness in flyback and LLC resonant converters.

Key Specifications

Pinout & Package

STPS10170CR is available in both DPAK (TO-252) and D²PAK (TO-263) packages, both featuring a center-tab cathode configuration: pins 1 and 3 are anodes (A1, A2), pin 2 is the shared cathode tab (K). The center tab serves as primary thermal path and electrical return.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBR10150CT and VS-10BQ100PBF, STPS10170CR uniquely combines 170 V blocking, 0.69 V VF at elevated temperature, and certified avalanche capability - making it the only option suitable for unclamped 170 V-rated telecom and industrial SMPS without compromising reliability or thermal margin.

Availability

STPS10170CR is available at Aetrix Electronics and suitable for telecom AC/DC adapters, industrial 48 V rectifiers, and server PSU secondary-side designs requiring stable component supply, long-lifecycle availability, and conduction-cooled thermal management.

Supply support for STPS10170CR 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.

STPS10170CR belongs to ST's high-voltage Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in compact, thermally constrained SMPS architectures.

FAQ

What is the maximum continuous forward current per diode at 100 °C ambient?

At Tamb = 100 °C with Rth(j-a) = 15 °C/W (per Figure 2), the maximum IF(AV) per diode is 3.8 A. This is derived from thermal derating curves: junction temperature must remain ≤175 °C, and conduction loss P = 0.65×IF + 0.02×IF² determines self-heating. Full 5 A rating requires Tc = 155 °C, not Tamb.

Can STPS10170CR be used in place of a single 10 A Schottky?

No - STPS10170CR contains two independent 5 A diodes with separate anodes and a shared cathode. It cannot replace a monolithic 10 A single-diode Schottky because its internal structure does not support series or parallel connection of the two dies without violating thermal or electrical isolation requirements.

Is the center tab electrically isolated from the anodes?

Yes - the center tab is the common cathode (K), electrically isolated from both anodes (A1 and A2). Pin 1 and Pin 3 are anodes; Pin 2 (tab) is cathode. No internal short exists between anodes or between anode and cathode except through the intended PN junctions.

Does STPS10170CR require a heatsink for 5 A operation?

Yes - at 5 A per diode, junction temperature exceeds 125 °C without heatsinking. With a 25 mm² 2 oz copper pour (Rth(j-a) ≈ 15 °C/W), junction rise is ~60 °C above ambient, keeping Tj ≤135 °C at Tamb = 40 °C. For Tc = 155 °C rating, a dedicated heatsink attached to the center tab is mandatory.