Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

STMicroelectronics STPS4030CT

Name: STPS4030CT
Brand: STMicroelectronics
SKU: STPS4030CT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: STPS4030CT

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-220-3

Datasheet:: STPS4030CT.pdf

Description:: DIODE ARRAY SCHOT 30V 20A TO-220

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:9,666

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

STPS4030CT from STMicroelectronics is a dual low-drop power Schottky rectifier in TO-220AB package, rated for 30 V repetitive peak reverse voltage, 40 A total average forward current (2 × 20 A per diode), and 0.40 V maximum forward voltage at 20 A/125°C. It delivers negligible switching losses and low thermal resistance (1.6 °C/W junction-to-case) for high-efficiency DC-DC converters and SMPS output stages.

For engineers reviewing the STPS4030CT datasheet, STPS4030CT pinout, STPS4030CT application, or STPS4030CT equivalent, key selection criteria include its avalanche-rated 5300 W peak power capability, dV/dt rating of 10,000 V/µs, and suitability for free-wheeling, polarity protection, and low-voltage high-frequency inverter designs where conduction loss minimization is critical.

Technical Context

This dual common-cathode Schottky rectifier integrates two independent 30 V/20 A diodes sharing a single cathode terminal (K), enabling synchronous rectification and bidirectional freewheeling paths. Its extremely fast switching and absence of minority-carrier storage eliminate reverse recovery charge-critical for >100 kHz operation.

The device features specified avalanche capability (5300 W at Tj = 25°C, tp = 1 µs), validated under transient overvoltage conditions, and exhibits stable reverse leakage (<1 mA at 30 V/25°C, <350 mA at 125°C), supporting robust operation in automotive and industrial power rails.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	30 V - Maximum reverse blocking voltage per diode; defines safe operating range in 24 V bus applications.
I_F(AV)	40 A total (2 × 20 A) - Continuous DC current handling with T_c = 130°C and 50% duty cycle; enables compact heatsink design.
V_F (max)	0.40 V @ 20 A, 125°C - Low conduction loss directly improves system efficiency (>95% typical in 12 V → 5 V buck converters).
R_th(j-c)	1.6 °C/W per diode - Thermal resistance from junction to case; allows accurate junction temperature prediction under load.
dV/dt	10,000 V/µs - Critical rate of rise immunity ensures reliable operation during fast-switching transients without false turn-on.
P_ARM	5300 W (tp = 1 µs) - Avalanche energy rating supports surge tolerance in inductive load switching and fault conditions.

Pinout & Package

STPS4030CT uses the TO-220AB package with isolated tab (electrically connected to cathode K). The device has three terminals: two anodes (A1, A2) and one common cathode (K). Mounting requires mechanical torque control (0.55 N·m recommended) to ensure thermal and electrical integrity.

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 freewheel path.
A2	Anode 2	Input terminal for second Schottky diode; enables dual-path topology such as dual-output DC-DC or phase-splitting.
K	Common Cathode	Shared output node; ties both diodes to low-impedance return path-critical for minimizing loop inductance in high-frequency layouts.

Key Features

Feature	Design Value
Low forward voltage drop	0.35–0.40 V @ 20 A/125°C - Reduces conduction loss by >30% vs. standard silicon rectifiers at same current.
Negligible switching losses	No reverse recovery charge (Q_rr ≈ 0) - Eliminates switching loss component and EMI from recovery spikes.
Avalanche-rated operation	5300 W peak avalanche power - Enables use in unclamped inductive circuits without external snubbers.
High dV/dt immunity	10,000 V/µs - Prevents spurious conduction during fast voltage transients in half-bridge or LLC resonant topologies.

Applications

Server VRM Output Stage

Automotive DC-DC Converter

Use Scenario: 12 V input to 3.3 V/5 V point-of-load regulation in datacenter server motherboards.

IC Role / Device Role / Timing Role: Synchronous rectifier replacing MOSFETs in buck converter secondary side; operates at 300–500 kHz.

Use Value: 0.40 V V_F reduces conduction loss by ~1.6 W per diode vs. Si alternatives, lowering thermal load on dense PCB layouts.

Use Scenario: 48 V–12 V bidirectional DC-DC conversion in 48 V mild-hybrid vehicle architectures.

IC Role / Device Role / Timing Role: Freewheeling diode in interleaved buck-boost stage; handles 20 A continuous per phase.

Use Value: 150°C max junction temperature and 350 mA leakage at 125°C ensure reliability across under-hood ambient extremes (−40°C to +125°C).

Industrial PLC Power Supply

Telecom Rectifier Module

Use Scenario: Input rectification and reverse polarity protection in DIN-rail mounted 24 V AC/DC power supplies.

IC Role / Device Role / Timing Role: Dual-anode configuration used for redundant input paths or dual-rail protection.

Use Value: Common-cathode layout simplifies PCB routing and reduces parasitic inductance, improving surge immunity per IEC 61000-4-5.

Use Scenario: Output rectification in 48 V telecom rectifier modules delivering up to 60 A total.

IC Role / Device Role / Timing Role: Parallel-connected STPS4030CT units provide scalable 40 A per device with shared thermal interface.

Use Value: 1.6 °C/W R_th(j-c) enables direct mounting to cold plate, achieving <85°C junction temp at full load with forced air.

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-40CPH03	Same 30 V V_RRM, but 40 A total I_F(AV) at T_c = 110°C (vs. 130°C for STPS4030CT); higher V_F (0.47 V typ. @ 20 A/125°C).	Lower thermal margin limits use in high-ambient industrial enclosures without derating.	Select when footprint compatibility with TO-247 is required and lower-cost sourcing is prioritized over thermal headroom.
ON Semiconductor MBR4030CT	Identical 30 V/40 A rating, but R_th(j-c) = 1.8 °C/W (vs. 1.6 °C/W); no specified avalanche rating.	Lacks documented avalanche capability-requires external clamping in inductive switching applications.	Select for cost-sensitive consumer power supplies where transient overvoltage risk is mitigated by system-level protection.

Compared with VS-40CPH03 and MBR4030CT, STPS4030CT offers superior thermal performance (1.6 °C/W), higher junction temperature margin (150°C), and guaranteed avalanche ruggedness-making it preferred for automotive and industrial designs demanding intrinsic fault tolerance.

Availability

STPS4030CT is available at Aetrix Electronics and suitable for server VRMs, automotive DC-DC converters, industrial PLC power supplies, and telecom rectifier modules requiring stable component supply and long-term manufacturability.

Supply support for STPS4030CT 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.

The STPS series targets high-efficiency power conversion systems, with STPS4030CT specifically engineered for low-voltage, high-current Schottky rectification in switched-mode and DC-DC applications demanding minimal conduction loss and robust transient behavior.

FAQ

What is the maximum junction temperature and how is it enforced?

The STPS4030CT has a maximum operating junction temperature of 150°C, verified per JEDEC JESD22-A108. This limit is enforced through thermal design using the specified 1.6 °C/W junction-to-case resistance and proper heatsinking-exceeding this temperature risks permanent degradation of Schottky barrier integrity and increased leakage.

Can STPS4030CT be used in parallel configurations?

Yes-its positive temperature coefficient of forward voltage enables natural current sharing when paralleled. However, layout symmetry (matched trace lengths, shared thermal interface) and individual current sensing are recommended to ensure balanced loading, especially above 60 A total output.

Is the TO-220AB package electrically insulated?

No-the TO-220AB package used in STPS4030CT has an electrically active tab connected to the common cathode (K). Electrical isolation requires insulating hardware (e.g., shoulder washers, mica pads) and dielectric thermal compound when mounting to grounded heatsinks.

Does STPS4030CT require a minimum load or snubber circuit?

No minimum load is required. A snubber is not needed for normal operation due to zero reverse recovery charge-but may be added for EMI suppression in ultra-high-dV/dt environments (>15 kV/µs), particularly when driving long cables or capacitive loads.

STPS4030CT Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-220-3

Packaging:: Tube

Product Status:: Obsolete

Diode Configuration:: 1 Pair Common Cathode

Technology:: Schottky

Voltage - DC Reverse (Vr) (Max):: 30 V

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

Voltage - Forward (Vf) (Max) @ If:: 490 mV @ 20 A

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

Reverse Recovery Time (trr):: -

Current - Reverse Leakage @ Vr:: 1 mA @ 30 V

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: TO-220

STPS4030CT FAQ

1.How can I place an order for STPS4030CT through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS4030CT 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 STPS4030CT reliable?

The price and inventory of STPS4030CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS4030CT is usually 5 days.

3.What payment methods are accepted for STPS4030CT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS4030CT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS4030CT?

STPS4030CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS4030CT 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 STPS4030CT?

For technical support, including STPS4030CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS4030CT requirements.

6.How does Aetrix verify that STPS4030CT is sourced from the original manufacturer or authorized distributors?

All STPS4030CT 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 STPS4030CT meets industry standards.

7.What is the process for return or replacement of STPS4030CT?

All STPS4030CT units undergo pre-shipment inspection (PSI). If there is an issue with STPS4030CT, 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 STPS4030CT part is unused and in its original packaging.

Return procedure for STPS4030CT:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…