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

STMicroelectronics STPS61L45CW

Name: STPS61L45CW
Brand: STMicroelectronics
SKU: STPS61L45CW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS61L45CW

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-247-3

Datasheet:: STPS61L45CW.pdf

Description:: DIODE ARR SCHOTT 45V 30A TO247-3

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Product details

Overview

STPS61L45CW from STMicroelectronics is a dual center-tap Schottky rectifier in TO-247 package, rated for 45 V repetitive peak reverse voltage and 2 × 30 A average forward current per diode at Tc = 120 °C. It delivers typ. 0.45 V forward voltage drop at 30 A and 125 °C, with 1.3 °C/W junction-to-case thermal resistance per diode - optimized for high-frequency switch-mode power supplies in desktop and server SMPS.

For engineers reviewing the STPS61L45CW datasheet, STPS61L45CW pinout, STPS61L45CW application, or STPS61L45CW equivalent, key selection criteria include avalanche rating (10,000 W at 1 µs), low leakage (≤400 µA at 45 V/125 °C), dual-diode thermal coupling behavior, and compliance with 80 PLUS efficiency standards via reduced conduction loss.

Technical Context

This dual-center-tap Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode terminal (K), enabling synchronous rectification in center-tapped transformer topologies. Its low VF and high IF(AV) support continuous conduction mode operation up to 1 MHz switching frequency.

Thermal design relies on validated per-diode Rth(j-c) = 1.3 °C/W and inter-diode coupling resistance Rth(c) = 0.2 °C/W, allowing accurate junction temperature estimation when both diodes conduct simultaneously. Avalanche capability (PARM = 10,000 W, tp = 1 µs) supports transient overvoltage robustness without external snubbers.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	45 V - Maximum reverse blocking voltage per diode; defines safe operating range in center-tapped secondary windings.
IF(AV) per diode	30 A at Tc = 120 °C - Continuous DC output current capability per leg; enables 60 A total dual-leg output in parallel-configured designs.
VF(typ)	0.45 V at IF = 30 A, Tj = 125 °C - Directly reduces conduction loss (P = IF × VF) and improves system efficiency above 90% in 12 V/24 V SMPS rails.
IR(max)	400 µA at VR = 45 V, Tj = 125 °C - Low leakage preserves light-load efficiency and minimizes standby power in energy-compliant designs.
Rth(j-c) per diode	1.3 °C/W - Enables precise heatsink sizing; combined with Rth(c) = 0.2 °C/W, supports thermal modeling of shared case temperature rise under dual-diode load.
PARM	10,000 W at tp = 1 µs - Specifies single-pulse avalanche energy handling; allows operation without clamping circuits during MOSFET turn-off spikes.

Pinout & Package

TO-247 package with isolated mounting tab (electrically connected to cathode K). Three terminals: A1 (Anode 1), A2 (Anode 2), K (Common Cathode).

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode of Diode 1	Connects to one end of center-tapped transformer secondary; carries half the output current in push-pull configuration.
A2	Anode of Diode 2	Connects to opposite end of center-tapped secondary; conducts during alternate half-cycle; thermally coupled to A1 via shared case.
K	Common Cathode	Output node for full-wave rectified DC; electrically and thermally central point; requires low-inductance PCB layout for EMI control.

Key Features

Feature	Design Value
Avalanche-rated operation	10,000 W peak power (1 µs pulse) enables reliable handling of transformer leakage spikes without external protection.
Low VF at high temperature	0.45 V typ. at 30 A/125 °C reduces conduction loss by ≥15% vs. standard Schottkys, directly improving 80 PLUS Titanium efficiency margins.
Dual-diode thermal coupling	Rth(c) = 0.2 °C/W between diodes allows accurate joint thermal modeling - critical for derating in high-power center-tapped converters.
ECOPACK® compliant packaging	Halogen-free, RoHS-compliant TO-247 housing meets environmental regulations for server/desktop OEMs targeting ENERGY STAR v8.0.

Applications

Server SMPS Rectification

Desktop ATX Power Supply

Use Scenario: High-current +12 V rail rectification in 80 PLUS Platinum-certified 850 W server PSUs using center-tapped transformer topology.

IC Role / Device Role / Timing Role: Dual-leg synchronous rectifier replacing discrete diodes; shares common cathode output node for low-inductance return path.

Use Value: 0.45 V VF at 30 A/125 °C cuts conduction loss by 2.1 W per diode vs. legacy Schottkys, enabling >94% efficiency at 50% load.

Use Scenario: +5 V and +3.3 V dual-rail rectification in compact ATX v2.4 power supplies with tight thermal constraints.

IC Role / Device Role / Timing Role: Center-tap Schottky pair delivering regulated low-voltage outputs; leverages shared cathode for simplified PCB routing.

Use Value: 400 µA max IR at 125 °C maintains <15 mW standby dissipation, supporting ErP Lot 6 compliance for <0.5 W no-load consumption.

Industrial AC-DC Adapters

Telecom Rectifier Modules

Use Scenario: 48 V input, 12 V/30 A output industrial adapter operating continuously at 60 °C ambient with forced air cooling.

IC Role / Device Role / Timing Role: Primary secondary-side rectifier in forward converter with center-tapped secondary winding.

Use Value: 150 °C max junction temperature and 1.3 °C/W Rth(j-c) allow stable operation with 15 K/W heatsink, eliminating need for thermal derating.

Use Scenario: -48 V telecom rectifier module requiring high reliability and surge immunity in distributed power architecture.

IC Role / Device Role / Timing Role: Dual-anode Schottky for redundant +12 V output generation; avalanche rating handles line transients per GR-1089-CORE.

Use Value: 500 A non-repetitive surge rating (tp = 10 ms) withstands lightning-induced surges without degradation, extending field lifetime beyond 10 years.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS60L45CW	Same TO-247 package, identical VRRM and VF, but IF(AV) = 2 × 30 A at Tc = 115 °C (not 120 °C); Rth(j-c) = 1.4 °C/W per diode.	Slightly lower thermal margin in high-ambient designs; suitable where heatsink capacity is constrained but peak current demand is intermittent.	Select when thermal budget permits 5 °C lower case temperature limit and cost sensitivity outweighs 0.1 °C/W Rth penalty.
VS-60CPH045	Vishay TO-247 dual Schottky: VRRM = 45 V, IF(AV) = 2 × 30 A at Tc = 115 °C, VF = 0.52 V typ. at 30 A/125 °C, Rth(j-c) = 1.5 °C/W.	Higher VF increases conduction loss by ~1.2 W per diode at full load; avalanche rating not specified in datasheet.	Choose only if ST supply chain constraints exist and efficiency loss is acceptable in non-80 PLUS applications.

Compared with STPS61L45CW, STPS60L45CW trades 5 °C thermal headroom for identical electrical specs, while VS-60CPH045 sacrifices 0.07 V VF and missing avalanche rating - making STPS61L45CW optimal for high-efficiency, high-reliability center-tapped SMPS where thermal and transient robustness are co-critical.

Availability

STPS61L45CW is available at Aetrix Electronics and suitable for server SMPS rectification, desktop ATX power supplies, and industrial AC-DC adapters requiring stable component supply and long-term lifecycle support.

Supply support for STPS61L45CW 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 STPS61L45CW belongs to ST's high-current Schottky rectifier product line, engineered specifically for high-frequency, high-efficiency switch-mode power conversion in energy-compliant computing and telecom infrastructure.

FAQ

What is the maximum junction temperature for continuous operation?

The STPS61L45CW has a maximum operating junction temperature of 150 °C, verified per absolute ratings table in Doc ID 14192 Rev 2. This limit applies under steady-state conditions with proper heatsinking and accounts for thermal runaway prevention when mounted on an individual heatsink.

Is the common cathode (K) electrically isolated from the TO-247 mounting tab?

No - the TO-247 mounting tab is internally connected to the common cathode (K) terminal. Electrical isolation requires insulating hardware (e.g., shoulder washers) and dielectric thermal interface material when mounting to a grounded heatsink.

How does the dual-diode thermal coupling affect derating in high-power designs?

When both diodes conduct simultaneously, junction temperature rise is calculated as ΔTj(diode1) = P(diode1) × 1.3 + P(diode2) × 0.2 °C/W. This coupling effect must be included in thermal simulations to avoid exceeding 150 °C Tj under full-load, continuous operation.

Can STPS61L45CW replace STPS61L45CT in existing TO-220AB layouts?

No - STPS61L45CW uses TO-247 package with different footprint, hole spacing, and thermal pad geometry versus TO-220AB. Mechanical redesign and thermal validation are required; direct substitution is not possible without PCB revision and heatsink requalification.

STPS61L45CW Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Active

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 45 V

Current - Average Rectified (Io) (per Diode):: 30A

Voltage - Forward (Vf) (Max) @ If:: 560 mV @ 30 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1.5 mA @ 45 V

Operating Temperature - Junction:: 150°C (Max)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

STPS61L45CW FAQ

1.How can I place an order for STPS61L45CW through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS61L45CW 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 STPS61L45CW reliable?

The price and inventory of STPS61L45CW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS61L45CW is usually 5 days.

3.What payment methods are accepted for STPS61L45CW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS61L45CW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS61L45CW?

STPS61L45CW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS61L45CW 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 STPS61L45CW?

For technical support, including STPS61L45CW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS61L45CW requirements.

6.How does Aetrix verify that STPS61L45CW is sourced from the original manufacturer or authorized distributors?

All STPS61L45CW 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 STPS61L45CW meets industry standards.

7.What is the process for return or replacement of STPS61L45CW?

All STPS61L45CW units undergo pre-shipment inspection (PSI). If there is an issue with STPS61L45CW, 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 STPS61L45CW part is unused and in its original packaging.

Return procedure for STPS61L45CW:

1.Submit a request within 90 days.

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

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