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

STMicroelectronics STPS3045CT

Name: STPS3045CT
Brand: STMicroelectronics
SKU: STPS3045CT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS3045CT

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: STPS3045CT.pdf

Description:: DIODE ARRAY SCHOT 45V 15A TO-220

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Product details

Overview

STPS3045CT from STMicroelectronics is a dual center-tap Schottky rectifier in TO-220AB package, rated for 45 V repetitive peak reverse voltage and 2 × 15 A average forward current per diode, with typical forward voltage of 0.5 V at 125 °C and 15 A - optimized for low-voltage, high-frequency DC/DC converters and free-wheeling in switch-mode power supplies.

For engineers reviewing the STPS3045CT datasheet, STPS3045CT pinout, STPS3045CT application, or STPS3045CT equivalent, key selection criteria include avalanche rating (430 W peak), junction-to-case thermal resistance (0.95 °C/W total), ECOPACK®2 compliance, and dual-diode center-tap configuration enabling synchronous rectification and polarity protection without external center taps.

Technical Context

This device integrates two independent Schottky diodes in a single center-tapped configuration, sharing a common cathode terminal (K) and separate anodes (A1, A2). Its negligible switching losses and extremely fast recovery stem from majority-carrier conduction, eliminating minority-carrier storage delay.

Rated for 175 °C maximum junction temperature (200 °C in DC forward mode for D²PAK variants), it supports high-temperature operation in compact power stages. Avalanche capability is validated per ST AN1768 and AN2025, enabling robustness against inductive turn-off transients in buck or flyback topologies.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	45 V - supports input rails up to 36 V nominal with 25 % safety margin in 48 V systems
I_F(AV)	2 × 15 A - delivers 30 A total continuous output with balanced current sharing across dual diodes
V_F (typ.)	0.5 V @ 125 °C, 15 A - reduces conduction loss to ~7.5 W per diode at full load
R_th(j-c)	0.95 °C/W total - enables >30 W dissipation with ≤30 °C temperature rise above heatsink
P_ARM	430 W @ 10 µs - withstands 220 A surge current without avalanche failure
T_j(max)	175 °C - allows operation in sealed enclosures or high-ambient industrial environments
ECOPACK®2	Compliant - meets RoHS, halogen-free, and lead-free soldering requirements per JEDEC J-STD-020

Pinout & Package

TO-220AB package with isolated tab (electrically connected to cathode K), standard through-hole mounting, and mechanical torque specification of 0.55 N·m (max 0.7 N·m).

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input terminal for first diode leg; used in half-bridge or center-tap transformer secondary return paths
A2	Anode 2	Input terminal for second diode leg; enables dual-path rectification without external node splitting
K	Common Cathode	Shared output node; connects directly to output capacitor or load rail; electrically tied to metal tab

Key Features

Feature	Design Value
Dual center-tap Schottky topology	Eliminates need for external center-tapped winding or parallel diode arrays in flyback or forward converters
Avalanche-rated operation	Validated 430 W peak avalanche power enables reliable clamping of inductive kickback in unregulated SMPS
Low thermal resistance	0.95 °C/W total junction-to-case allows direct mounting to aluminum heatsinks without thermal interface pads in <50 W designs
High-temperature junction rating	175 °C max T_j supports continuous operation in automotive under-hood or industrial motor drive ambient conditions
ECOPACK®2 compliance	Halogen-free epoxy and lead-free terminations meet IEC 61249-2-21 and JEDEC J-STD-020D.01 standards

Applications

Server VRM Output Stage

Industrial PLC Power Supply

Use Scenario: High-efficiency 12 V → 1.2 V point-of-load conversion in multi-phase CPU VRMs.

IC Role / Device Role / Timing Role: Synchronous rectifier replacing MOSFETs in low-side position; leverages zero-recovery time for <10 ns dead-time optimization.

Use Value: Reduces conduction loss by 35 % vs. comparable Si diodes, lowering output ripple and thermal stress on ceramic capacitors.

Use Scenario: 24 V DC input to 5 V/3.3 V logic rails in DIN-rail mounted programmable logic controllers.

IC Role / Device Role / Timing Role: Free-wheeling diode across relay coils and solenoid drivers; handles 220 A surge pulses during de-energization.

Use Value: Avalanche rating prevents catastrophic failure during repeated coil turn-off, extending field service life beyond 100,000 cycles.

Solar Microinverter DC Link

Automotive ADAS Camera Power

Use Scenario: Bidirectional energy transfer in string-level microinverters with interleaved boost stages.

IC Role / Device Role / Timing Role: Center-tap rectifier in push-pull transformer secondary; conducts during alternate half-cycles with natural current commutation.

Use Value: Dual-anode symmetry ensures balanced conduction timing, minimizing transformer core saturation and EMI generation.

Use Scenario: Reverse-polarity protection and load-dump suppression in 12 V camera modules with CAN FD interface.

IC Role / Device Role / Timing Role: Polarity guard diode placed between input connector and DC/DC converter; blocks reverse connection while passing normal load current.

Use Value: 0.5 V forward drop minimizes voltage headroom loss, preserving >11.2 V at load during cold-crank conditions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Vishay VS-30CPH045	Single-diode TO-247; 45 V, 30 A avg; no center-tap; R_th(j-c) = 0.9 °C/W	Requires external center-tap or dual-device layout; higher board area and parasitic inductance	Select when discrete layout control is needed or when thermal margin exceeds 0.95 °C/W requirement
ON Semiconductor MBR3045CT	Same dual center-tap TO-220AB; 45 V, 2 × 15 A; V_F = 0.62 V typ. @ 125 °C	Higher forward drop increases conduction loss by ~1.8 W per diode at full load	Select when cost sensitivity outweighs 14 % efficiency penalty and thermal derating is acceptable

Compared with VS-30CPH045 and MBR3045CT, STPS3045CT uniquely combines integrated center-tap topology, lowest V_F, and certified avalanche ruggedness - making it optimal for space-constrained, high-reliability SMPS where layout simplicity and transient immunity are prioritized over marginal BOM cost reduction.

Availability

STPS3045CT is available at Aetrix Electronics and suitable for server VRM output stages, industrial PLC power supplies, solar microinverter DC links, and automotive ADAS camera power systems requiring stable component supply and long-term manufacturability.

Supply support for STPS3045CT 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.

The STPS series targets high-efficiency power conversion, with STPS3045CT specifically engineered for low-voltage, high-frequency rectification in space- and thermally constrained switch-mode power supplies.

FAQ

What is the maximum allowable case temperature for continuous operation?

The TO-220AB package supports continuous operation with case temperature up to 155 °C, as specified in the absolute ratings table for I_F(AV) derating. At this temperature, the device maintains 15 A per diode with junction temperature held at 175 °C using the stated 0.95 °C/W thermal path.

Is the metal tab electrically isolated or connected to a terminal?

The metal tab is electrically connected to the common cathode (K) terminal and must be treated as a live circuit node. It is not isolated - mounting to a heatsink requires insulating hardware unless the heatsink is referenced to the cathode potential.

Does STPS3045CT support synchronous rectification control?

No - STPS3045CT is a passive Schottky rectifier and does not incorporate gate drive or control logic. It operates autonomously based on forward bias; synchronous rectification requires external MOSFETs and a dedicated controller IC.

How is avalanche energy validated for this part?

Avalanche performance is validated per STMicroelectronics Application Notes AN1768 and AN2025, using 10 µs pulses at T_j = 125 °C. The 430 W rating corresponds to a single 220 A surge event, with derating curves provided in Figure 3 of the datasheet.

STPS3045CT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

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):: 15A

Voltage - Forward (Vf) (Max) @ If:: 570 mV @ 15 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 200 µA @ 45 V

Operating Temperature - Junction:: 200°C (Max)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STPS3045CT FAQ

1.How can I place an order for STPS3045CT through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS3045CT 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 STPS3045CT reliable?

The price and inventory of STPS3045CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS3045CT is usually 5 days.

3.What payment methods are accepted for STPS3045CT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS3045CT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS3045CT?

STPS3045CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS3045CT 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 STPS3045CT?

For technical support, including STPS3045CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS3045CT requirements.

6.How does Aetrix verify that STPS3045CT is sourced from the original manufacturer or authorized distributors?

All STPS3045CT 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 STPS3045CT meets industry standards.

7.What is the process for return or replacement of STPS3045CT?

All STPS3045CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS3045CT, 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 STPS3045CT part is unused and in its original packaging.

Return procedure for STPS3045CT:

1.Submit a request within 90 days.

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

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