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

STMicroelectronics STPS30L45CW

Name: STPS30L45CW
Brand: STMicroelectronics
SKU: STPS30L45CW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS30L45CW

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-247-3

Datasheet:: STPS30L45CW.pdf

Description:: DIODE ARR SCHOTT 45V 15A TO247-3

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Product details

Overview

STPS30L45CW from STMicroelectronics is a dual-center-tap low-drop Schottky rectifier in TO-247 package, rated for 45 V repetitive reverse voltage, 30 A total average forward current (15 A per diode), and maximum junction temperature of 150 °C. It delivers low forward voltage drop (0.55 V typ. at 15 A, 25 °C), low thermal resistance (1.60 °C/W junction-to-case per diode), and avalanche-rated ruggedness for high-frequency DC/DC converters and SMPS output stages.

For engineers reviewing the STPS30L45CW datasheet, STPS30L45CW pinout, STPS30L45CW application, or STPS30L45CW equivalent, this device is selected for low-loss freewheeling, synchronous rectification replacement, and polarity protection where conduction loss minimization and thermal robustness under transient overload are critical.

Technical Context

This dual-diode Schottky rectifier integrates two independent anode-cathode paths sharing a common cathode terminal (center-tap configuration), enabling bidirectional current handling in half-bridge or dual-output topologies. Its low dV/dt rating (10,000 V/µs) and specified avalanche capability (6000 W peak, 1 µs pulse) support reliable operation during voltage transients without external snubbing.

The TO-247 package provides 0.85 °C/W total junction-to-case thermal resistance (per diode), optimized for conduction-cooled mounting to heatsinks. Static characteristics include tightly bounded forward voltage (0.42–0.50 V at 15 A, 125 °C) and controlled reverse leakage (≤200 mA at 125 °C, VR = 45 V), ensuring predictable power loss across industrial ambient temperature ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	45 V - Maximum reverse blocking voltage before breakdown; defines safe operating range in 12–24 V output rails.
I_F(AV) per diode	15 A - Continuous DC current per diode at T_c = 135 °C, δ = 0.5; enables 30 A total dual-path output capability.
V_F (max)	0.55 V @ 15 A, 25 °C - Low conduction loss directly reduces I²R heating and improves efficiency in high-current, low-voltage outputs.
R_th(j-c) per diode	1.60 °C/W - Junction-to-case thermal resistance; allows precise heatsink sizing for ≤150 °C junction limit under full load.
P_ARM (peak)	6000 W @ 1 µs - Avalanche energy rating ensures survivability during inductive switching spikes without failure.
dV/dt	10,000 V/µs - Critical rate-of-rise immunity prevents spurious turn-on in fast-switching converters.
I_FSM	220 A @ 10 ms - Non-repetitive surge current capacity supports inrush and fault-current handling in power supplies.

Pinout & Package

STPS30L45CW uses a 3-terminal TO-247 package with isolated metal tab (heatsink). The case is electrically insulated and thermally conductive. Pin assignment is standardized: Terminal 1 = Anode 1, Terminal 2 = Cathode (common center tap), Terminal 3 = Anode 2.

Pin/Terminal	Circuit Role	Design Meaning
Terminal 1 (left lead)	Anode 1	Input path for first diode; connects to high-side switch node in half-bridge or primary winding end in dual-output flyback.
Terminal 2 (center lead)	Cathode (common)	Shared output node for both diodes; ties to system ground or low-side return in center-tapped transformer configurations.
Terminal 3 (right lead)	Anode 2	Input path for second diode; interfaces with complementary switch node or opposite winding end.

Key Features

Feature	Design Value
Low forward voltage drop	0.42–0.50 V at 15 A and 125 °C - Reduces conduction loss by >30% vs. standard silicon rectifiers in 12 V output stages.
Avalanche-rated ruggedness	6000 W peak avalanche power - Eliminates need for external clamping in flyback or LLC resonant converter secondary side.
Insulated TO-247 package	2000 V_DC isolation between tab and terminals - Enables direct mounting to grounded heatsinks without insulating hardware.
High-frequency suitability	Negligible reverse recovery charge (Q_rr ≈ 0) - Permits operation up to 500 kHz without switching loss penalty or EMI increase.
Thermal coupling optimization	0.85 °C/W total R_th(j-c) - Supports compact thermal design with <10 K rise at 30 A total dissipation (≈12 W).

Applications

Server PSU Output Rectification

Industrial DC/DC Converter Freewheeling

Use Scenario: 12 V/20 A output stage in redundant ATX-style server power supply using center-tapped transformer topology.

IC Role / Device Role / Timing Role: Dual-path synchronous rectifier replacement; conducts during transformer secondary half-cycles with minimal voltage drop.

Use Value: Achieves >94% efficiency at full load by limiting V_F-induced loss to <8 W total, reducing heatsink size by 35% vs. Si diodes.

Use Scenario: Isolated 24 V to 5 V/15 A DC/DC module for PLC I/O power with active clamp forward topology.

IC Role / Device Role / Timing Role: Freewheeling diode across main transformer secondary; clamps inductive kick during MOSFET off-time.

Use Value: Withstands 220 A surge and 10,000 V/µs dV/dt without oscillation, eliminating snubber network and saving PCB area.

Solar Microinverter DC Link Protection

Automotive On-Board Charger Polarity Guard

Use Scenario: Bidirectional DC link interface between PV string and H-bridge inverter, requiring reverse polarity and transient suppression.

IC Role / Device Role / Timing Role: Center-tapped polarity protection diode; blocks reverse current while conducting forward during normal operation.

Use Value: 150 °C max junction rating and 200 mA IR at 125 °C ensure reliability in unventilated enclosures exposed to desert ambient temperatures.

Use Scenario: Input protection circuit in 6.6 kW OBC accepting 200–450 V DC input, where accidental battery reversal must be blocked without fuse blow.

IC Role / Device Role / Timing Role: High-current reverse-polarity blocking diode placed before PFC stage; conducts only during correct polarity connection.

Use Value: 30 A average current rating and 0.55 V forward drop prevent thermal runaway during sustained 10 A charging current, avoiding thermal shutdown.

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
Vishay VS-30CPH045	Same V_RRM (45 V), higher I_F(AV) (30 A per diode), TO-247AC package with non-insulated tab.	Requires insulating washer for grounded heatsink mounting; lacks avalanche rating documentation.	Select when higher per-diode current headroom is needed and mechanical insulation can be added externally.
ON Semiconductor MBR3045CT	Identical pinout and V_RRM, but VF = 0.75 V (max) at 15 A, 25 °C; no avalanche rating specified.	Higher conduction loss increases thermal load by ~2.5 W per diode at full load; unsuitable for unheatsinked or high-ambient designs.	Choose only for cost-sensitive, lower-efficiency applications where 150 °C junction margin is not required.

Compared with VS-30CPH045 and MBR3045CT, STPS30L45CW uniquely combines certified avalanche ruggedness, insulated TO-247 packaging, and sub-0.55 V forward drop-making it the preferred choice for thermally constrained, high-reliability SMPS where transient immunity and mounting simplicity are mandatory.

Availability

STPS30L45CW is available at Aetrix Electronics and suitable for server power supplies, industrial DC/DC converters, solar microinverters, and automotive on-board chargers requiring stable component supply and long-term industrial lifecycle support.

Supply support for STPS30L45CW 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, digital, and mixed-signal ICs, discrete devices, and modules for industrial, automotive, and power applications.

The STPS series targets high-efficiency power conversion systems, with STPS30L45CW specifically engineered for low-voltage, high-current rectification in switched-mode topologies where thermal performance and transient robustness are critical.

FAQ

What is the thermal resistance from junction to case for STPS30L45CW?

The total junction-to-case thermal resistance (R_th(j-c)) for STPS30L45CW is 0.85 °C/W, measured across both diodes in the TO-247 package. This value reflects the combined thermal path from each die to the shared metal tab, enabling accurate heatsink sizing for continuous 30 A operation at T_c = 135 °C.

Does STPS30L45CW require a heatsink in all applications?

Yes - due to its 30 A total average current rating and 12–15 W typical power dissipation, STPS30L45CW requires a mechanically mounted heatsink with thermal interface material. Without forced air or adequate copper area, junction temperature exceeds 150 °C within seconds at full load, triggering thermal degradation.

Can STPS30L45CW replace a single-diode Schottky in a center-tapped design?

No - STPS30L45CW is a dual-diode device with a common cathode (center-tap configuration); it replaces two discrete Schottky diodes wired to a shared cathode node. Substituting it for a single-diode part would short the anodes or leave one path unconnected, causing immediate failure.

Is the TO-247 package of STPS30L45CW electrically insulated?

Yes - the TO-247 package features an electrically insulated metal tab rated for 2000 V_DC isolation between the heatsink-mounting surface and all three terminals. This eliminates the need for mica washers or silicone pads when mounting to grounded chassis or heatsinks.

STPS30L45CW 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):: 15A

Voltage - Forward (Vf) (Max) @ If:: 550 mV @ 15 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 400 µA @ 45 V

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

STPS30L45CW FAQ

1.How can I place an order for STPS30L45CW through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS30L45CW 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 STPS30L45CW reliable?

The price and inventory of STPS30L45CW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS30L45CW is usually 5 days.

3.What payment methods are accepted for STPS30L45CW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS30L45CW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS30L45CW?

STPS30L45CW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS30L45CW 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 STPS30L45CW?

For technical support, including STPS30L45CW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS30L45CW requirements.

6.How does Aetrix verify that STPS30L45CW is sourced from the original manufacturer or authorized distributors?

All STPS30L45CW 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 STPS30L45CW meets industry standards.

7.What is the process for return or replacement of STPS30L45CW?

All STPS30L45CW units undergo pre-shipment inspection (PSI). If there is an issue with STPS30L45CW, 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 STPS30L45CW part is unused and in its original packaging.

Return procedure for STPS30L45CW:

1.Submit a request within 90 days.

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

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