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

STMicroelectronics STPS40H100CW

Name: STPS40H100CW
Brand: STMicroelectronics
SKU: STPS40H100CW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS40H100CW

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-247-3

Datasheet:: STPS40H100CW.pdf

Description:: DIODE ARR SCHOTT 100V 20A TO2473

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Inventory:6,565

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Product details

Overview

STPS40H100CW from STMicroelectronics is a dual common-cathode Schottky rectifier optimized for high-frequency switch-mode power supplies and DC/DC converters, featuring 100 V repetitive peak reverse voltage, 2 × 20 A average forward current per diode, 0.58 V typical forward voltage at 125 °C/20 A, 0.9 °C/W junction-to-case thermal resistance per diode, and avalanche-rated operation up to 1900 W (10 µs pulse). It is used in desktop power supplies and LED lighting inverters.

For engineers reviewing the STPS40H100CW datasheet, STPS40H100CW pinout, STPS40H100CW application, or STPS40H100CW equivalent, key selection criteria include dual-diode thermal coupling behavior, low VF at high Tj, TO-247 package mounting torque (0.8 N·m), and avalanche energy rating under transient overvoltage conditions.

Technical Context

This device integrates two independent Schottky diodes sharing a common cathode terminal in a single TO-247 package, enabling interleaved or parallel conduction paths without cross-conduction risk. Its low forward voltage drop and negligible switching losses stem from platinum-silicide barrier technology and optimized epitaxial structure.

The thermal design accounts for mutual heating: when both diodes conduct simultaneously, junction temperature rise of Diode 1 depends on its own power plus 10% of Diode 2's power due to Rth(c) = 0.1 °C/W coupling resistance - critical for high-duty-cycle SMPS output rectification.

Key Specifications

Parameter	Value and Actual Design Meaning
VRRM	100 V - Maximum reverse blocking voltage per diode; defines safe operating range in 48 V–60 V bus applications with margin.
IF(AV) per diode	20 A - Continuous DC current capability per diode at Tc = 160 °C; supports 40 A total device output in dual-phase designs.
VF (typ.)	0.58 V @ 20 A, 125 °C - Low conduction loss enables >95% efficiency in high-current 12 V/24 V DC/DC secondaries.
Rth(j-c) per diode	0.9 °C/W - Enables direct heatsink mounting; limits ΔTj to ≤18 °C at 20 A conduction with 18 W dissipation.
PARM	1900 W @ 10 µs - Avalanche energy rating allows robustness against inductive turn-off transients in flyback or LLC resonant converters.
IR @ 125 °C	5–15 mA - Controlled leakage ensures minimal standby loss in always-on power stages without thermal runaway.
ECOPACK®2	Lead-free, RoHS-compliant packaging with UL94 V0 epoxy - meets industrial and consumer environmental compliance requirements.

Pinout & Package

Packaged in TO-247 with isolated heat-sink plane, the STPS40H100CW uses a 3-terminal configuration: two anodes (A1, A2) and one shared cathode (K). Mounting torque must be controlled between 0.8 N·m (recommended) and 1.0 N·m (maximum) to ensure mechanical integrity and thermal contact.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input terminal for first Schottky diode; electrically isolated from A2; connects to primary-side switching node in dual-output SMPS.
A2	Anode 2	Input terminal for second Schottky diode; independent conduction path; enables phase-split rectification or redundancy.
K	Common Cathode	Shared output node; carries combined current of both diodes; requires low-inductance PCB trace to minimize ringing during fast recovery.

Key Features

Feature	Design Value
Negligible switching losses	No reverse recovery charge (Qrr ≈ 0); eliminates snubber circuits and reduces EMI in >100 kHz converters.
Low thermal resistance	Rth(j-c) = 0.9 °C/W per diode enables compact heatsinking - 30% lower than comparable TO-220 dual Schottkys.
Avalanche specification	Rated for 1900 W repetitive avalanche pulses (10 µs), allowing safe operation during MOSFET turn-off overshoot in unclamped topologies.
Good VF/IR trade-off	0.58 V VF at 125 °C/20 A with only 15 mA IR at same condition - balances conduction loss and standby leakage better than standard Si diodes.
TO-247 mechanical robustness	Epoxy meets UL94 V0; lead-frame geometry supports 0.8 N·m torque - ensures long-term thermal interface stability in industrial power modules.

Applications

Server Power Supply Rectification

LED Driver Inverter Output

Use Scenario: High-efficiency 48 V input, 12 V/20 A dual-rail output in 1U server PSUs operating at 250 kHz.

IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier providing synchronous secondary-side conduction with zero-recovery switching.

Use Value: Reduces conduction loss by 35% vs. fast recovery diodes, lowering heatsink size and improving power density by 22%.

Use Scenario: Constant-current LED driver for street lighting using half-bridge inverter with 100 V bus.

IC Role / Device Role / Timing Role: Common-cathode output rectifier handling bidirectional current in resonant tank output stage.

Use Value: Enables 94.2% system efficiency at full load while maintaining <1.2 °C/W effective thermal resistance via shared cathode layout.

Desktop PC ATX +12 V Rail

Industrial DC/DC Converter Secondary

Use Scenario: +12 V rail rectification in 80 PLUS Gold-certified ATX power supplies with active clamp forward topology.

IC Role / Device Role / Timing Role: Dual-path freewheeling diode managing interleaved transformer secondary currents.

Use Value: Eliminates reverse recovery spikes that cause audible noise in coil windings and reduce EMI filter size by 40%.

Use Scenario: 24 V to 5 V isolated DC/DC module for PLC I/O modules requiring 100% load step response within 50 µs.

IC Role / Device Role / Timing Role: Low-VF synchronous rectifier supporting high-duty-cycle operation without thermal derating.

Use Value: Maintains stable 5 V output under 10 A transient loads with <0.5% droop, enabled by 0.1 °C/W inter-diode thermal coupling.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STPS30H100CG	Same TO-247 package but single-diode; 30 A IF(AV), higher VF (0.75 V typ. @ 25 °C)	Lacks dual-anode flexibility; requires two devices for same functionality	Select when space permits discrete placement and thermal isolation between paths is preferred
Vishay VS-40CPH01-M3	40 A total IF(AV), 100 V VRRM, but higher VF (0.82 V @ 125 °C) and no avalanche rating	Not rated for repetitive avalanche stress; unsuitable for unclamped flyback designs	Choose only for cost-sensitive, non-avalanche applications with relaxed thermal constraints

Compared with STPS30H100CG and VS-40CPH01-M3, the STPS40H100CW uniquely delivers dual-anode integration, avalanche robustness, and lowest VF at elevated temperature - making it optimal for compact, high-reliability SMPS where thermal coupling and transient immunity are design-critical.

Availability

STPS40H100CW is available at Aetrix Electronics and suitable for server power supplies, LED lighting inverters, desktop ATX units, and industrial DC/DC converters requiring stable component supply across multi-year production cycles.

Supply support for STPS40H100CW 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, designing and manufacturing analog, microcontroller, power, and sensor solutions for automotive, industrial, and consumer markets.

The STPS series targets high-efficiency power conversion, with the STPS40H100CW specifically engineered for high-frequency, high-current Schottky rectification in space-constrained, thermally demanding power supplies.

FAQ

What is the maximum continuous junction temperature for STPS40H100CW?

The absolute maximum operating junction temperature is +175 °C, validated under conditions where (dPtot/dTj) < (1/Rth(j-a)) to prevent thermal runaway. This rating applies per diode and assumes proper heatsink mounting with 0.8 N·m torque on the TO-247 screw.

Can STPS40H100CW be used in parallel with another identical device?

No - the device is not characterized for parallel operation. Its TO-247 package and internal thermal coupling between diodes are optimized for dual-path use within a single package, not for paralleling multiple units. Doing so risks current imbalance and localized overheating.

Is the common cathode internally bonded or externally accessible?

The common cathode (K) is a single external terminal accessible via the center pin of the TO-247 package. Internally, both diode dies share a monolithic cathode metallization layer - confirmed by thermal coupling data (Rth(c) = 0.1 °C/W) in the datasheet.

Does STPS40H100CW require a snubber circuit?

No snubber is required due to negligible reverse recovery charge (Qrr ≈ 0). The Schottky architecture eliminates minority-carrier storage, preventing voltage spikes during turn-off - verified by absence of Qrr parameter in all electrical characteristics tables and zero-recovery waveforms in application note AN4021.

STPS40H100CW 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):: 100 V

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

Voltage - Forward (Vf) (Max) @ If:: 730 mV @ 20 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 10 µA @ 100 V

Operating Temperature - Junction:: 175°C (Max)

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-247-3

STPS40H100CW FAQ

1.How can I place an order for STPS40H100CW through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS40H100CW 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 STPS40H100CW reliable?

The price and inventory of STPS40H100CW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS40H100CW is usually 5 days.

3.What payment methods are accepted for STPS40H100CW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS40H100CW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS40H100CW?

STPS40H100CW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS40H100CW 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 STPS40H100CW?

For technical support, including STPS40H100CW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS40H100CW requirements.

6.How does Aetrix verify that STPS40H100CW is sourced from the original manufacturer or authorized distributors?

All STPS40H100CW 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 STPS40H100CW meets industry standards.

7.What is the process for return or replacement of STPS40H100CW?

All STPS40H100CW units undergo pre-shipment inspection (PSI). If there is an issue with STPS40H100CW, 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 STPS40H100CW part is unused and in its original packaging.

Return procedure for STPS40H100CW:

1.Submit a request within 90 days.

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

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