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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Diode Arrays

STMicroelectronics STPS80170CWLY

Name: STPS80170CWLY
Brand: STMicroelectronics
SKU: STPS80170CWLY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS80170CWLY

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-247-3

Datasheet:: STPS80170CWLY.pdf

Description:: DIODE ARRAY SCHOT 170V 40A TO247

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Product details

Overview

STPS80170CWLY from STMicroelectronics is a dual common-cathode Schottky rectifier in TO-247 package, rated 170 V reverse voltage and 40 A average forward current per diode, with typical forward voltage drop of 0.68 V at 125 °C and 40 A. It delivers low thermal resistance (0.7 °C/W per diode), high-frequency switching capability, and avalanche-rated operation for telecom and industrial SMPS.

For engineers reviewing the STPS80170CWLY datasheet, STPS80170CWLY pinout, STPS80170CWLY application, or STPS80170CWLY equivalent, key selection criteria include junction temperature rating (175 °C), dual-diode thermal coupling behavior, leakage-current trade-off at elevated Tj, and TO-247 mechanical mounting constraints for heatsink interface.

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode terminal, enabling synchronous or interleaved conduction paths in dual-phase DC/DC topologies. Its low VF and high IF(AV) support high-efficiency rectification in continuous conduction mode (CCM) converters operating up to several hundred kHz.

The TO-247 package provides low Rth(j–c) = 0.7 °C/W per diode and total Rth(j–c) = 0.5 °C/W when both diodes operate simultaneously, with coupling resistance Rth(c) = 0.3 °C/W. Avalanche energy rating (2750 W at 10 µs, Tj = 125 °C) supports transient overvoltage robustness without external snubbers.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	170 V - Maximum repetitive reverse blocking voltage per diode; defines safe operating range in boost/flyback output stages.
IF(AV) per diode	40 A at Tc = 150 °C - Continuous DC current handling per diode under heatsink-controlled conditions.
VF(typ)	0.68 V at 40 A, 125 °C - Typical forward drop determining conduction loss (P ≈ 0.62 × IF(AV) + 0.003 × IF²(RMS)).
Rth(j–c) per diode	0.7 °C/W - Junction-to-case thermal resistance; enables accurate thermal modeling when mounted on heatsink.
IR(max)	80 mA at 125 °C, VR = VRRM - Maximum reverse leakage per diode; impacts standby power in offline PSUs.
Tj(max)	+175 °C - Maximum junction temperature; allows operation in high-ambient industrial environments with derated current.
PARM	2750 W at tp = 10 µs, Tj = 125 °C - Repetitive avalanche power rating; supports unclamped inductive switching stress.

Pinout & Package

TO-247 package with isolated metal tab (heat-sink plane), three leads: two anodes (A1, A2) and one common cathode (K). Mounting torque: 0.8 N·m recommended (max 1.0 N·m). Epoxy meets UL94 V0.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input terminal for first Schottky diode; connects to primary-side switch node in dual-phase LLC or interleaved buck.
A2	Anode 2	Input terminal for second Schottky diode; enables independent control or phase-shifted conduction.
K	Common cathode	Shared output node; routes combined forward current to output capacitor/bus; requires low-inductance layout.

Key Features

Feature	Design Value
ECOPACK®2 compliance	Lead-free, halogen-free packaging meeting RoHS and REACH requirements without compromising thermal performance.
High Tj capability	175 °C maximum junction temperature enables operation in sealed enclosures or high-ambient telecom rectifiers.
Low Rth(j–c)	0.7 °C/W per diode reduces thermal bottleneck in high-power density designs; improves reliability margin vs. TO-220 alternatives.
Avalanche-rated	2750 W peak avalanche power (10 µs) eliminates need for external clamping in flyback snubberless designs.
Low leakage trade-off	80 mA max IR at 125 °C balances efficiency and thermal stability-lower than comparable 200 V Schottkys.

Applications

Telecom Rectification

Industrial SMPS Output Stage

Use Scenario: 48 V input telecom rectifier module converting -48 V DC to 12 V/24 V for base station backplane distribution.

IC Role / Device Role / Timing Role: Dual common-cathode Schottky rectifier providing synchronous rectification for two parallel output phases.

Use Value: 0.68 V VF at 125 °C reduces conduction loss by ~15% vs. legacy 100 V Schottkys, improving system efficiency above 92%.

Use Scenario: High-current output stage in 3 kW industrial AC/DC front-end with active PFC and dual-phase LLC resonant converter.

IC Role / Device Role / Timing Role: Secondary-side rectification element handling 80 A RMS total current across two paralleled diodes.

Use Value: 0.5 °C/W total Rth(j–c) enables direct mounting to shared heatsink, simplifying thermal design and reducing footprint vs. discrete TO-220 solutions.

Server PSU OR-ing

Renewable Energy Inverter Auxiliary Supply

Use Scenario: OR-ing diode array in redundant 12 V server power supply units to prevent backfeed during hot-swap events.

IC Role / Device Role / Timing Role: Bidirectional fault-isolation element leveraging low VF and fast recovery for minimal voltage drop during load sharing.

Use Value: 80 A surge rating (IFSM = 500 A) withstands inrush transients during cold-start, eliminating need for series fusing.

Use Scenario: Auxiliary 24 V DC supply in solar string inverters, powered from PV-side DC bus via isolated flyback with no optocoupler feedback.

IC Role / Device Role / Timing Role: Output rectifier in high-voltage flyback (170 V reflected), operating continuously at 65 °C ambient.

Use Value: 175 °C Tj(max) and 80 mA IR at 125 °C ensure stable regulation and low standby loss over 25-year field life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-80CPH017	Same VRRM (170 V), higher IF(AV) = 45 A/diode, but Rth(j–c) = 0.9 °C/W and no avalanche rating.	Lacks PARM specification; unsuitable for unclamped inductive switching or telecom surge immunity requirements.	Prefer STPS80170CWLY where avalanche robustness or lower thermal resistance is required.
ON Semiconductor MBR80170CT	Identical TO-247 package and pinout, but VF = 0.82 V (typ) at 40 A/125 °C and IR = 120 mA at 125 °C.	Higher conduction loss and leakage reduce efficiency in high-temperature, high-reliability telecom deployments.	Acceptable for cost-sensitive industrial SMPS where 175 °C Tj and low IR are non-critical.

Compared with VS-80CPH017 and MBR80170CT, STPS80170CWLY offers superior thermal performance (0.7 °C/W), verified avalanche capability (2750 W), and tighter leakage control (80 mA max), making it optimal for mission-critical telecom and high-density server PSUs.

Availability

STPS80170CWLY is available at Aetrix Electronics and suitable for telecom rectification, industrial SMPS output stages, server PSU OR-ing, and renewable energy inverter auxiliary supplies requiring stable component supply and long-term lifecycle assurance.

Supply support for STPS80170CWLY 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 automotive, industrial, and consumer markets.

The STPS series targets high-efficiency power conversion systems, with STPS80170CWLY specifically engineered for high-current, high-reliability Schottky rectification in telecom and industrial switched-mode power supplies.

FAQ

What is the maximum allowable case temperature for continuous operation?

The datasheet specifies IF(AV) = 40 A per diode at Tc = 150 °C. Exceeding this temperature requires current derating per Figure 2. At Tc = 160 °C, IF(AV) drops to ~32 A per diode. Thermal design must maintain case temperature ≤150 °C under worst-case ambient and airflow conditions.

Can STPS80170CWLY be used in single-diode configuration?

Yes. Either anode (A1 or A2) may be left unconnected while the other operates with the common cathode (K). The unused anode must be electrically isolated and thermally managed-its junction remains active and contributes to overall thermal resistance even when not conducting.

Is the TO-247 package electrically insulated?

No. The metal tab (heat-sink plane) is internally connected to the cathode (K) terminal. Electrical isolation from heatsink requires insulating washer and bushing. Mounting torque must stay within 0.8–1.0 N·m to avoid die cracking or solder joint fatigue.

How does thermal coupling affect simultaneous dual-diode operation?

When both diodes conduct, junction temperature rise is calculated as ΔTj(A1) = P₁ × 0.7 + P₂ × 0.3, where P₁ and P₂ are individual diode powers. This coupling effect increases effective thermal resistance versus single-diode use, requiring derating or enhanced heatsinking for full 80 A total output current.

STPS80170CWLY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: ECOPACK®2

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Active

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 170 V

Current - Average Rectified (Io) (per Diode):: 40A

Voltage - Forward (Vf) (Max) @ If:: 840 mV @ 40 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 80 µA @ 170 V

Operating Temperature - Junction:: -40°C ~ 175°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: TO-247 Long Leads

STPS80170CWLY FAQ

1.How can I place an order for STPS80170CWLY through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS80170CWLY on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STPS80170CWLY reliable?

The price and inventory of STPS80170CWLY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS80170CWLY is usually 5 days.

3.What payment methods are accepted for STPS80170CWLY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS80170CWLY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS80170CWLY?

STPS80170CWLY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS80170CWLY order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STPS80170CWLY?

For technical support, including STPS80170CWLY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS80170CWLY requirements.

6.How does Aetrix verify that STPS80170CWLY is sourced from the original manufacturer or authorized distributors?

All STPS80170CWLY products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STPS80170CWLY meets industry standards.

7.What is the process for return or replacement of STPS80170CWLY?

All STPS80170CWLY units undergo pre-shipment inspection (PSI). If there is an issue with STPS80170CWLY, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STPS80170CWLY part is unused and in its original packaging.

Return procedure for STPS80170CWLY:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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