STMicroelectronics STPS61170CWLY

Overview

STPS61170CWLY from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-247 package, rated for 170 V repetitive peak reverse voltage and 2 × 30 A average forward current per diode at Tc = 150 °C. It delivers low forward voltage drop (0.63 V typ. at 125 °C, 30 A), low thermal resistance (0.9 °C/W junction-to-case per diode), and avalanche capability (2290 W peak) for high-efficiency telecom and industrial SMPS.

For engineers reviewing the STPS61170CWLY datasheet, STPS61170CWLY pinout, STPS61170CWLY application, or STPS61170CWLY equivalent, key selection factors include its dual-diode thermal coupling behavior, junction temperature derating above 125 °C, conduction loss modeling (P = 0.54×IF(AV) + 0.0043×IF²(RMS)), and ECOPACK®2-compliant TO-247 mechanical footprint.

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous rectification or dual-output DC/DC conversion without cross-conduction risk. Its low VF and high Tj(max) of 175 °C support compact, high-power-density designs where thermal management is constrained.

The TO-247 package provides direct heatsink mounting via the metal tab (anode connection), with validated Rth(j-c) = 0.9 °C/W per diode and coupling resistance Rth(c) = 0.3 °C/W between diodes - critical for accurate multi-diode junction temperature prediction under unbalanced loading.

Key Specifications

Pinout & Package

TO-247 package with isolated metal tab (anode connection), three leads: Pin 1 (Anode 1), Pin 2 (Cathode), Pin 3 (Anode 2). Mounting torque: 0.8 N·m recommended (max 1.0 N·m). Epoxy meets UL94 V0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MBR60H150CT and VS-60CPH17, STPS61170CWLY offers superior thermal performance (0.9 °C/W), lower VF at elevated temperature, and documented avalanche capability - making it optimal for high-reliability, high-power-density telecom and industrial SMPS where thermal headroom and transient immunity are design-critical.

Availability

STPS61170CWLY is available at Aetrix Electronics and suitable for telecom AC-DC power supplies, industrial DC/DC converters, and server PSU secondary-side rectification requiring stable component supply and long-term lifecycle assurance.

Supply support for STPS61170CWLY 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.

The STPS series targets high-efficiency power conversion, with STPS61170CWLY specifically engineered for dual-channel Schottky rectification in high-frequency, high-temperature SMPS where thermal coupling and avalanche safety are essential.

FAQ

What is the maximum continuous forward current per diode at 145 °C case temperature?

At Tc = 145 °C, the STPS61170CWLY supports 30 A average forward current per diode (60 A total device rating), as confirmed in Table 1 of DS4414 Rev 3. This rating assumes δ = 0.5 square-wave conduction and proper heatsinking to maintain case temperature at or below 145 °C.

Is the common cathode pin internally bonded or externally accessible?

The cathode is externally accessible as Pin 2 (center lead) in the TO-247 package and is internally bonded to both diode dies. It serves as the sole cathode connection point - no internal splitting or isolation exists between the two diodes' cathodes.

Can STPS61170CWLY be used in reverse polarity protection circuits?

No - this device is a Schottky rectifier optimized for forward conduction only. Its 170 V VRRM and lack of reverse-blocking control logic make it unsuitable for active reverse-polarity protection; dedicated ideal diode controllers or MOSFET-based solutions are required instead.

How does thermal coupling between the two diodes affect reliability in unbalanced load conditions?

Thermal coupling via Rth(c) = 0.3 °C/W causes junction temperature of the loaded diode to rise not only from its own power but also from the adjacent diode's dissipation. Under 30 A/0 A imbalance, ΔTj increases by ~9 °C - necessitating derating per AN5088 to avoid exceeding 175 °C Tj.