STMicroelectronics STPS61170CW

Overview

STPS61170CW from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-247 package, rated for 2 × 30 A average forward current per diode, 170 V repetitive peak reverse voltage, and 175 °C maximum junction temperature. It delivers low forward voltage drop (0.63 V typ. at 30 A, 125 °C) and low thermal resistance (0.9 °C/W junction-to-case per diode), enabling high-efficiency operation in telecom power supplies and high-frequency DC/DC converters.

For engineers reviewing the STPS61170CW datasheet, STPS61170CW pinout, STPS61170CW application, or STPS61170CW equivalent, key selection criteria include dual-diode thermal coupling behavior, avalanche energy rating (2290 W at 10 µs), leakage current vs. temperature trade-off, and TO-247 mechanical mounting torque specification (0.8 N·m recommended).

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous rectification or dual-output SMPS topologies. Its low VF and low Rth(j-c) support high-power density designs where conduction loss minimization and thermal management are critical.

The diode pair exhibits avalanche capability with 2290 W peak repetitive avalanche power at Tj = 125 °C and tp = 10 µs, and maintains stable IR ≤ 60 mA per diode at 125 °C under full VRRM, supporting robust operation in transient-prone telecom and industrial power rails.

Key Specifications

Pinout & Package

Package: TO-247 - thermally optimized 3-pin through-hole package with isolated heat-sink plane; epoxy meets UL94 V0; recommended mounting torque: 0.8 N·m.

Key Features

Applications

Equivalent & Alternatives

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

Compared with VS-60CPH17 and MUR1620CT, STPS61170CW uniquely combines dual common-cathode integration, lowest VF among 170 V Schottkys, and certified avalanche capability-making it optimal for space-constrained, high-reliability telecom and industrial SMPS where thermal coupling and transient robustness are design-critical.

Availability

STPS61170CW is available at Aetrix Electronics and suitable for telecom power supplies, industrial DC/DC converters, and server PSU secondary-side rectification requiring stable component supply and long-term lifecycle assurance.

Supply support for STPS61170CW 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STPS series targets high-efficiency power conversion, with STPS61170CW specifically engineered for dual-output, high-current Schottky rectification in telecom and industrial SMPS where thermal performance and avalanche ruggedness are non-negotiable.

FAQ

What is the maximum continuous junction temperature for STPS61170CW?

The absolute maximum operating junction temperature is +175 °C, validated per Absolute Ratings Table 1 in DS4414 Rev 3. This rating applies under conditions where (dPtot/dTj) < (1/Rth(j-a)) to prevent thermal runaway, especially when mounted on a heatsink with known Rth(j-a).

How is thermal coupling managed between the two diodes in the TO-247 package?

Thermal coupling is quantified by Rth(c) = 0.3 °C/W (coupling resistance). When both diodes conduct simultaneously, ΔTj(diode1) = P(diode1) × 0.9 + P(diode2) × 0.3, as defined in Table 2 of DS4414. This enables accurate junction temperature prediction under unbalanced loading.

Does STPS61170CW support avalanche energy absorption in repetitive operation?

Yes-its repetitive peak avalanche power is specified as 2290 W at tp = 10 µs and Tj = 125 °C (Table 1). This is validated per ST's avalanche test methodology and supports reliable operation in clamped inductive switching circuits without external protection.

What is the recommended mounting torque for the TO-247 package?

The recommended torque value is 0.8 N·m, with a maximum allowable torque of 1.0 N·m, as specified in Section 2.1 of DS4414 Rev 3. Exceeding this risks mechanical damage to the leadframe or internal bond wires.