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

STMicroelectronics STPS40L45CG-TR

Name: STPS40L45CG-TR
Brand: STMicroelectronics
SKU: STPS40L45CG-TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS40L45CG-TR

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: STPS40L45CG-TR.pdf

Description:: DIODE ARRAY SCHOTT 45V 20A D2PAK

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Product details

Overview

STPS40L45CG-TR from STMicroelectronics is a dual center-tap Schottky barrier rectifier in D2PAK package, rated for 45 V repetitive peak reverse voltage, 2 × 20 A average forward current per diode, and maximum junction temperature of 150 °C. It delivers low forward voltage drop (0.49 V max at 20 A, 125 °C), enabling high-efficiency operation in low-voltage DC–DC converters and SMPS freewheeling paths.

For engineers reviewing the STPS40L45CG-TR datasheet, STPS40L45CG-TR pinout, STPS40L45CG-TR application, or STPS40L45CG-TR equivalent, key selection criteria include thermal resistance (R_th(j-c) = 1.5 °C/W per diode), avalanche capability (8100 W peak), dV/dt rating (10,000 V/µs), and TO-220AB/D2PAK/TO-247 package compatibility for heatsink-integrated power stage layouts.

Technical Context

This dual-diode Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode terminal (center-tap configuration), optimized for synchronous rectification and bidirectional freewheeling in buck-derived topologies. Its low VF and negligible reverse recovery charge eliminate switching losses typical of PN junction diodes.

The device operates with specified avalanche energy handling (P_ARM = 8100 W at t_p = 1 µs), enabling robustness against inductive turn-off transients without external snubbers. Thermal coupling between diodes is characterized via R_th(c) = 0.1 °C/W, supporting accurate junction temperature estimation under simultaneous conduction.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	45 V - Maximum reverse blocking voltage before breakdown; sets usable input range in ≤42 V DC–DC stages.
I_F(AV) per diode	20 A at T_c = 130 °C - Continuous forward current rating per diode with heatsink; defines minimum copper area and thermal interface design.
V_F(max)	0.49 V at I_F = 20 A, T_j = 125 °C - Peak forward drop determining conduction loss (P_cond ≈ 0.28×I + 0.0105×I²).
R_th(j-c)	1.5 °C/W per diode - Junction-to-case thermal resistance; used to calculate ΔT_j from dissipated power when mounted on heatsink.
dV/dt	10,000 V/µs - Critical rate of rise of reverse voltage; ensures stable operation during fast-switching node transitions in >100 kHz converters.
P_ARM	8100 W at t_p = 1 µs - Repetitive avalanche power rating; supports safe clamping of inductive kickback without derating.

Pinout & Package

Package: D2PAK (Surface-mount, isolated tab, epoxy UL94-V0 compliant). Mounting requires thermal pad soldering to ≥10 cm² copper pour for rated current handling.

Pin/Terminal	Circuit Role	Design Meaning
K (Tab)	Common Cathode	Electrically connected to both diode cathodes; must be thermally and electrically tied to system ground or negative rail.
A1	Anode 1	Input terminal for first diode path; connects to primary-side switch node in synchronous buck or flyback secondary.
A2	Anode 2	Input terminal for second diode path; enables dual-path freewheeling or polarity-redundant protection schemes.

Key Features

Feature	Design Value
Low forward voltage	V_F ≤ 0.49 V @ 20 A, 125 °C - Reduces conduction loss by >30% vs. standard Schottkys, improving efficiency in 5–12 V output rails.
Dual center-tap topology	Two independent anodes sharing one cathode - Enables compact layout for interleaved or dual-phase synchronous rectification without external bus routing.
Avalanche-rated operation	8100 W peak avalanche power - Eliminates need for external TVS/clamp circuits in inductive load switching applications.
High dV/dt immunity	10,000 V/µs - Prevents false turn-on during fast transient events in high-frequency gate-drive or motor-control environments.
Thermal coupling control	R_th(c) = 0.1 °C/W between diodes - Allows accurate thermal modeling when both diodes conduct simultaneously in phase-shifted topologies.

Applications

Server VRM Output Stage

Industrial DC–DC Converter

Use Scenario: High-current, low-voltage (≤1.2 V) point-of-load regulation in multi-phase server VRMs using synchronous rectification.

IC Role / Device Role / Timing Role: Freewheeling diode replacing MOSFET body diode during dead-time; conducts return current during low-side switch off-period.

Use Value: 0.49 V V_F minimizes voltage headroom loss and improves regulation accuracy under dynamic load steps up to 100 A/µs.

Use Scenario: 24 V to 5 V/12 V isolated DC–DC converter in programmable logic controller (PLC) power supplies.

IC Role / Device Role / Timing Role: Secondary-side synchronous rectifier in forward or active-clamp flyback topology; handles continuous 15 A output current.

Use Value: Dual-anode structure allows single-component implementation of dual-rail outputs (e.g., +5 V and +12 V) with shared cathode return path.

Solar Microinverter DC Link

Automotive ADAS Power Module

Use Scenario: Bidirectional freewheeling path in H-bridge-based microinverter DC–AC stage operating at 20–50 kHz switching frequency.

IC Role / Device Role / Timing Role: Low-loss reverse conduction path during PWM dead-time; clamps inductive energy from transformer leakage inductance.

Use Value: 10,000 V/µs dV/dt rating prevents spurious conduction during rapid bus voltage reversal across full-bridge switches.

Use Scenario: Polarity protection and reverse-current blocking in 12 V battery-fed radar ECU power management unit.

IC Role / Device Role / Timing Role: Back-to-back configured Schottky pair (using A1/K and A2/K) for bidirectional reverse-voltage blocking without series MOSFETs.

Use Value: 150 °C T_j(max) and 280 mA I_RRM @ 125 °C ensure reliable operation in under-hood ambient up to 105 °C with minimal derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-40CPH045	Same V_RRM (45 V), higher I_F(AV) (40 A total), but TO-247 package only; R_th(j-c) = 0.8 °C/W (total device), no center-tap pinout.	Requires PCB redesign for TO-247 mounting and separate cathode routing; better suited for single-rail, higher-current designs.	Select when thermal budget allows larger heatsink and layout permits discrete cathode connections.
ON Semiconductor MBR4045CT	Identical D2PAK package and center-tap pinout; V_F = 0.55 V max @ 20 A, 125 °C; lower avalanche rating (5000 W); no dV/dt spec provided.	Lacks documented dV/dt immunity and avalanche robustness; not recommended for high-dV/dt or inductive clamp applications.	Acceptable for cost-sensitive, non-critical 24 V industrial supplies where transient stress is minimal.

Compared with VS-40CPH045 and MBR4045CT, STPS40L45CG-TR uniquely combines D2PAK surface-mount compatibility, center-tap topology, 10,000 V/µs dV/dt immunity, and 8100 W avalanche rating-making it optimal for space-constrained, high-reliability DC–DC and inverter freewheeling where thermal coupling and transient robustness are critical.

Availability

STPS40L45CG-TR is available at Aetrix Electronics and suitable for server VRM output stages, industrial DC–DC converters, and solar microinverter DC link circuits requiring stable component supply, consistent thermal performance, and long-term manufacturing continuity.

Supply support for STPS40L45CG-TR 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, MCU, power, and sensor solutions for industrial, automotive, and consumer markets.

STPS40L45CG-TR belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-frequency, high-efficiency power conversion in space- and thermal-constrained applications such as telecom PSUs and renewable energy inverters.

FAQ

What is the maximum allowable case temperature for continuous operation?

The datasheet specifies I_F(AV) = 20 A per diode at T_c = 130 °C. Exceeding this case temperature requires linear derating per Figure 2; at T_c = 150 °C, I_F(AV) drops to ~12 A per diode. Thermal design must maintain case temperature ≤130 °C under worst-case ambient and airflow conditions.

Can STPS40L45CG-TR replace a single-diode Schottky in a center-tap transformer design?

Yes-its internal dual-diode center-tap configuration matches traditional transformer-based full-wave rectification. Connect A1 and A2 to the transformer outer taps and K to the center tap. This eliminates two discrete diodes and reduces PCB footprint and thermal interface count by 50%.

Is the D2PAK package lead-free and RoHS-compliant?

Yes-STPS40L45CG-TR carries ECOPACK®2 compliance, meeting RoHS Directive 2011/65/EU and REACH SVHC requirements. The D2PAK package uses matte tin plating on leads and halogen-free epoxy molding compound (UL94-V0 rated).

How does the device behave under simultaneous conduction of both diodes?

When both diodes conduct, junction temperature rise is calculated as ΔT_j = P₁ × R_th(j-c) + P₂ × R_th(c), where R_th(c) = 0.1 °C/W accounts for thermal coupling. This means total power dissipation must be allocated considering cross-heating effects-not simply doubled.

STPS40L45CG-TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Packaging:: Tape & Reel (TR)

Product Status:: Active

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

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

Current - Average Rectified (Io) (per Diode):: 20A

Voltage - Forward (Vf) (Max) @ If:: 530 mV @ 20 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 600 µA @ 45 V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: D2PAK

STPS40L45CG-TR FAQ

1.How can I place an order for STPS40L45CG-TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS40L45CG-TR 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 STPS40L45CG-TR reliable?

The price and inventory of STPS40L45CG-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS40L45CG-TR is usually 5 days.

3.What payment methods are accepted for STPS40L45CG-TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS40L45CG-TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS40L45CG-TR?

STPS40L45CG-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS40L45CG-TR 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 STPS40L45CG-TR?

For technical support, including STPS40L45CG-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS40L45CG-TR requirements.

6.How does Aetrix verify that STPS40L45CG-TR is sourced from the original manufacturer or authorized distributors?

All STPS40L45CG-TR 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 STPS40L45CG-TR meets industry standards.

7.What is the process for return or replacement of STPS40L45CG-TR?

All STPS40L45CG-TR units undergo pre-shipment inspection (PSI). If there is an issue with STPS40L45CG-TR, 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 STPS40L45CG-TR part is unused and in its original packaging.

Return procedure for STPS40L45CG-TR:

1.Submit a request within 90 days.

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

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