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

STMicroelectronics STPS30L40CW

Name: STPS30L40CW
Brand: STMicroelectronics
SKU: STPS30L40CW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS30L40CW

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-247-3

Datasheet:: STPS30L40CW.pdf

Description:: DIODE ARR SCHOTT 40V 15A TO247-3

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Product details

Overview

STPS30L40CW from STMicroelectronics is a dual-center-tap low-drop Schottky rectifier optimized for high-frequency DC-DC converters and switched-mode power supplies. It delivers 30 A RMS forward current per device, 40 V repetitive peak reverse voltage, and a maximum forward voltage drop of 0.50 V at 15 A and 125°C - enabling efficient low-voltage, high-current rectification in compact power stages.

For engineers reviewing the STPS30L40CW datasheet, STPS30L40CW pinout, STPS30L40CW application, or STPS30L40CW equivalent, key selection criteria include its dual-diode center-tap configuration, TO-247 package thermal performance (R_th(j-c) = 0.85 °C/W per diode), avalanche-rated capability (6000 W peak), and suitability for free-wheeling, polarity protection, and low-loss synchronous rectifier replacement roles.

Technical Context

This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode terminal (center-tap topology), supporting half-wave or full-wave configurations without external wiring. Its negligible switching losses and ultra-low forward voltage stem from platinum-silicide Schottky barrier technology and optimized metal-semiconductor interface design.

Thermal management is enabled by direct conduction cooling via the TO-247 insulated tab, with specified mounting torque (0.8 N·m recommended) and thermal resistance from junction to case (0.85 °C/W per diode). Avalanche energy handling (6000 W at T_j = 25°C, t_p = 1 µs) supports transient overvoltage robustness in inductive load switching.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - Maximum reverse blocking voltage per diode; defines safe operating limit in buck, flyback, or freewheeling topologies.
I_F(RMS)	30 A - Total RMS forward current rating for the dual-device package; enables high-power density rectification without parallel devices.
V_F (max)	0.50 V @ 15 A, 125°C - Low conduction loss ensures <1.5 W dissipation per diode at rated current, reducing heatsink requirements.
R_th(j-c)	0.85 °C/W per diode - Junction-to-case thermal resistance enables >50 W continuous power dissipation with standard heatsinking.
I_FSM	220 A @ 10 ms - Non-repetitive surge rating supports motor startup, capacitor charging, and short-circuit fault tolerance.
dV/dt	10,000 V/µs - High critical rate-of-rise immunity prevents false turn-on in fast-switching SMPS with steep voltage transients.
T_j(max)	150 °C - Maximum junction temperature allows operation in thermally constrained environments like sealed power modules.

Pinout & Package

STPS30L40CW is housed in a TO-247 package with insulated metal tab for direct heatsink mounting. The three-terminal configuration features two anodes (A1, A2) and one shared cathode (K), forming a center-tapped dual-diode structure ideal for symmetrical current paths.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input terminal for first Schottky diode; connects to primary-side switch node in synchronous rectifier or freewheeling path.
A2	Anode 2	Input terminal for second Schottky diode; enables dual-path or interleaved converter designs with shared cathode return.
K	Common Cathode	Center-tap output node; serves as low-impedance return path for both diodes, minimizing loop inductance in high-frequency layouts.

Key Features

Feature	Design Value
Low forward voltage drop	V_F ≤ 0.50 V @ 15 A, 125°C - Reduces conduction loss by >30% vs. standard silicon rectifiers, improving efficiency in 3.3–12 V output rails.
Negligible switching losses	No minority-carrier storage - Enables clean zero-voltage switching in resonant topologies and eliminates reverse recovery noise.
Avalanche-rated capability	P_ARM = 6000 W @ 1 µs - Withstands inductive kickback without failure, eliminating need for external snubbers in flyback or boost converters.
Low thermal resistance	R_th(j-c) = 0.85 °C/W per diode - Allows >40 W sustained power dissipation with moderate heatsink surface area (≥100 cm²).
TO-247 mechanical robustness	Mounting torque: 0.8 N·m (recommended); insulated tab - Ensures reliable thermal contact and electrical isolation in high-vibration industrial power systems.

Applications

Server VRM Output Stage

Industrial DC-DC Converter

Use Scenario: High-current, low-voltage (≤5 V) output stage in server voltage regulator modules delivering up to 100 A per phase.

IC Role / Device Role / Timing Role: Dual-center-tap Schottky rectifier replacing synchronous MOSFETs in cost-sensitive or thermally constrained phases.

Use Value: Delivers <0.5 V forward drop at 15 A per diode, reducing conduction loss by ~1.2 W per phase versus standard Si diodes - lowering local hotspot temperature by ≥8°C.

Use Scenario: Isolated 24 V input to 5 V/12 V output DC-DC converter in programmable logic controller (PLC) power supply.

IC Role / Device Role / Timing Role: Freewheeling diode in secondary-side synchronous rectification circuit with center-tap transformer winding.

Use Value: Eliminates reverse recovery ringing and EMI due to zero stored charge, enabling stable operation at 500 kHz switching frequency without added filtering.

Automotive Body Control Module

Telecom Rectifier Module

Use Scenario: Polarity protection and reverse battery protection in 12 V automotive body control units exposed to load dump transients.

IC Role / Device Role / Timing Role: Bidirectional clamping diode configured in series with power input, leveraging avalanche rating for transient suppression.

Use Value: Withstands 6000 W avalanche pulses per diode, absorbing ISO 7637-2 pulse 5a energy without derating or external TVS - simplifying BOM.

Use Scenario: Secondary-side rectification in 48 V telecom rectifier modules delivering 20–30 A at 3.3 V or 5 V for base station processors.

IC Role / Device Role / Timing Role: Dual-diode center-tap configuration used in full-wave rectifier topology with center-tapped transformer.

Use Value: Achieves 92% peak efficiency at 25 A load due to combined low V_F and low R_th(j-c), meeting NEBS GR-63-CORE thermal compliance at 60°C ambient.

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-30CPH04	Same 40 V V_RRM, 30 A I_F(RMS), but TO-247AC package with non-insulated tab; R_th(j-c) = 1.0 °C/W per diode.	Requires insulating washer for heatsink mounting; lower avalanche rating (4500 W) limits use in high-energy transient environments.	Select when cost sensitivity outweighs insulation requirement and thermal margin is ≥15°C above STPS30L40CW.
ON Semiconductor MBR3045CT	45 V V_RRM, same TO-247 package, but higher V_F (0.72 V @ 15 A, 25°C); no specified avalanche rating.	Higher forward loss increases conduction heating; unsuitable for applications requiring guaranteed avalanche survival.	Choose only if higher reverse voltage margin is prioritized over efficiency and transient robustness.

Compared with VS-30CPH04 and MBR3045CT, STPS30L40CW provides superior thermal performance (0.85 vs. ≥1.0 °C/W), certified avalanche capability (6000 W), and insulated mounting - making it optimal for high-reliability, high-efficiency, and thermally dense power designs where safety and long-term stability are critical.

Availability

STPS30L40CW is available at Aetrix Electronics and suitable for server VRMs, industrial DC-DC converters, and automotive body control modules requiring stable component supply and long-lifecycle support.

Supply support for STPS30L40CW 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, specializing in power management, analog, microcontrollers, and automotive-grade ICs with vertical manufacturing capabilities.

STPS30L40CW belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability rectification in space-constrained, thermally demanding power conversion systems.

FAQ

What is the pin configuration of STPS30L40CW?

The STPS30L40CW has three terminals: Anode 1 (A1), Anode 2 (A2), and Common Cathode (K). A1 and A2 are electrically isolated anodes sharing a single cathode connection, forming a center-tapped dual-diode structure. Pin assignment follows standard TO-247 mechanical layout with A1 and A2 on left/right leads and K on the center lead.

Can STPS30L40CW replace a single-diode Schottky in a full-wave rectifier?

Yes - STPS30L40CW is designed for full-wave center-tapped transformer rectification. Connect transformer center tap to K (cathode), and outer windings to A1 and A2. This replaces two discrete Schottky diodes while halving PCB footprint and parasitic inductance, provided transformer secondary voltage matches the 40 V V_RRM rating.

Is STPS30L40CW RoHS compliant and halogen-free?

Yes - STPS30L40CW meets RoHS Directive 2011/65/EU and is manufactured with halogen-free epoxy (UL94 V-0 rated). The TO-247 package uses lead-free terminations and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1, allowing unlimited floor life under dry storage conditions.

What is the maximum allowable mounting torque for STPS30L40CW?

The recommended mounting torque is 0.8 N·m, with a maximum allowable torque of 1.0 N·m. Exceeding 1.0 N·m risks mechanical damage to the TO-247 leadframe or internal die attach. Torque must be applied using a calibrated tool with the heatsink surface flat and clean to ensure uniform thermal contact and avoid localized stress on the insulated tab.

STPS30L40CW Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-247-3

Packaging:: Tube

Product Status:: Obsolete

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 40 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:: 360 µA @ 40 V

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

STPS30L40CW FAQ

1.How can I place an order for STPS30L40CW through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS30L40CW 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 STPS30L40CW reliable?

The price and inventory of STPS30L40CW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS30L40CW is usually 5 days.

3.What payment methods are accepted for STPS30L40CW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS30L40CW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS30L40CW?

STPS30L40CW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS30L40CW 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 STPS30L40CW?

For technical support, including STPS30L40CW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS30L40CW requirements.

6.How does Aetrix verify that STPS30L40CW is sourced from the original manufacturer or authorized distributors?

All STPS30L40CW 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 STPS30L40CW meets industry standards.

7.What is the process for return or replacement of STPS30L40CW?

All STPS30L40CW units undergo pre-shipment inspection (PSI). If there is an issue with STPS30L40CW, 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 STPS30L40CW part is unused and in its original packaging.

Return procedure for STPS30L40CW:

1.Submit a request within 90 days.

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

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