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

STMicroelectronics STPS30L40CG

Name: STPS30L40CG
Brand: STMicroelectronics
SKU: STPS30L40CG
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STPS30L40CG

Manufacturer:: STMicroelectronics

Category:: Diode Arrays

Package:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

Datasheet:: STPS30L40CG.pdf

Description:: DIODE ARRAY SCHOTT 40V 15A D2PAK

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Product details

Overview

STPS30L40CG 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 total average forward current (15 A per diode), 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 server VRMs and telecom power modules.

For engineers reviewing the STPS30L40CG datasheet, STPS30L40CG pinout, STPS30L40CG application, or STPS30L40CG equivalent, key selection criteria include its D2PAK package thermal performance (R_th(j-c) = 0.85 °C/W per diode), avalanche-rated capability (6000 W peak), and dual-diode center-tap configuration for synchronous rectifier or freewheeling use in half-bridge topologies.

Technical Context

This dual Schottky rectifier integrates two independent anode-cathode junctions sharing a common cathode terminal (center-tap configuration), supporting bidirectional freewheeling or dual-phase output rectification. Its negligible switching losses and low dV/dt sensitivity (10,000 V/µs) make it suitable for hard-switched 100–500 kHz converters without snubbers.

The device operates up to 150°C junction temperature with specified avalanche energy handling (P_ARM = 6000 W at t_p = 1 µs), and exhibits low thermal resistance (0.85 °C/W junction-to-case per diode) when mounted on copper areas ≥ 80 cm² - critical for thermally constrained board-level designs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	40 V - supports input/output rails ≤ 36 V nominal, e.g., 12 V or 24 V DC-DC stages
I_F(AV) per diode	15 A - enables 30 A total continuous output with dual-phase interleaving or redundancy
V_F max	0.50 V @ 15 A, 125°C - reduces conduction loss to ~7.5 W per diode at full load
R_th(j-c) per diode	0.85 °C/W - allows ≤ 40°C temperature rise with 47 W dissipation under heatsink mounting
I_FSM	220 A @ 10 ms - withstands startup surges and short-circuit events in regulated PSUs
dV/dt rating	10,000 V/µs - immune to false turn-on in fast-switching SiC/GaN-based converters
T_j max	150 °C - compatible with industrial-grade thermal management without derating below 135°C

Pinout & Package

STPS30L40CG is housed in a surface-mount D2PAK (TO-263) package with three terminals: two anodes (A1, A2) and one shared cathode (K). The exposed metal tab is electrically connected to the cathode and serves as the primary thermal path.

Pin/Terminal	Circuit Role	Design Meaning
A1	Anode 1	Input node for first diode leg; connects to transformer secondary or switch node in center-tap topology
A2	Anode 2	Input node for second diode leg; enables dual-phase or complementary freewheeling paths
K	Common Cathode	Output node (shared return); must be routed to low-impedance ground plane and heatsink area

Key Features

Feature	Design Value
Low forward voltage drop	V_F ≤ 0.50 V @ 15 A, 125°C - cuts conduction loss by >30% vs. standard silicon rectifiers
Specified avalanche capability	6000 W peak avalanche power @ 1 µs - protects against inductive kickback without external clamping
Dual-diode center-tap architecture	Single-package integration of two matched Schottky junctions - eliminates layout mismatch and reduces PCB area
Low thermal resistance	R_th(j-c) = 0.85 °C/W per diode - enables direct thermal coupling to copper pour without mechanical heatsink
Negligible switching losses	No minority-carrier storage delay - supports zero-voltage switching (ZVS) transitions up to 1 MHz

Applications

Server VRM Output Rectification

Telecom DC-DC Converter Freewheeling

Use Scenario: High-current, low-voltage output stage of 48 V to 12 V or 5 V isolated DC-DC modules in data center servers.

IC Role / Device Role / Timing Role: Dual-center-tap Schottky rectifier providing synchronous rectification for both halves of center-tapped transformer secondary.

Use Value: Reduces output rectification loss by 4.2 W per diode vs. legacy 60 V Schottkys, improving full-load efficiency from 92.1% to 93.4%.

Use Scenario: Freewheeling path in 48 V input telecom brick converters operating at 250 kHz switching frequency.

IC Role / Device Role / Timing Role: Low-loss clamp diode conducting during MOSFET off-time to recover inductive energy from filter choke.

Use Value: Eliminates need for active synchronous gate drive timing; enables robust operation with <10 ns dV/dt immunity and no reverse recovery tail.

Industrial Motor Drive Snubber

Automotive ADAS Power Supply Polarity Protection

Use Scenario: Bidirectional snubbing network across IGBTs in 24 V/48 V BLDC motor inverters with regenerative braking.

IC Role / Device Role / Timing Role: Avalanche-rated dual Schottky absorbing inductive spikes during fast IGBT turn-off transitions.

Use Value: Withstands 220 A surge currents for 10 ms and dissipates 6 kW transient power - replaces discrete TVS + diode stacks.

Use Scenario: Reverse-polarity protection at 12 V input of radar ECU or camera module power supply.

IC Role / Device Role / Timing Role: Low-V_F series rectifier placed between battery and LDO/regulator input to block reverse current.

Use Value: Limits voltage drop to 0.42 V @ 10 A (vs. 0.7 V for silicon), preserving >96% input headroom for downstream regulators.

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-30CPH04-M3	Same 40 V V_RRM, 30 A total I_F(AV), but TO-220AB package (R_th(j-c) = 1.6 °C/W per diode)	Requires bolt-down heatsink; unsuitable for high-density SMT layouts	Select when mechanical mounting constraints favor through-hole and thermal mass outweighs footprint size
ON Semiconductor MBRS340CT	Lower I_F(AV) (3 A per diode), smaller SMC package, no avalanche rating	Limited to ≤ 6 A total output; not rated for surge or inductive clamp duty	Choose only for cost-sensitive, low-power auxiliary rails where surge immunity is non-critical

Compared with VS-30CPH04-M3 and MBRS340CT, STPS30L40CG uniquely combines D2PAK SMT compatibility, 0.85 °C/W thermal resistance, and 6000 W avalanche rating - making it the only option qualified for high-reliability, high-density, high-surge industrial DC-DC outputs.

Availability

STPS30L40CG is available at Aetrix Electronics and suitable for server VRMs, telecom DC-DC converters, and industrial motor drives requiring stable component supply and long-term manufacturing continuity.

Supply support for STPS30L40CG 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 ICs.

STPS30L40CG belongs to ST's "Power Schottky Rectifiers" product line, engineered specifically for high-efficiency, high-frequency power conversion in space-constrained industrial and computing applications.

FAQ

What is the thermal pad connection on STPS30L40CG?

The exposed metal tab on the D2PAK package is electrically tied to the common cathode (K) terminal and serves as the primary thermal interface. It must be soldered to a minimum 80 cm² copper pour on the PCB using thermal vias to internal ground planes to achieve the specified R_th(j-a) of 15 °C/W.

Can STPS30L40CG replace a single 30 A Schottky in a center-tap design?

Yes - STPS30L40CG integrates two 15 A Schottky diodes with a shared cathode, matching the electrical function of discrete center-tap configurations. Its matched V_F and T_j tracking across diodes ensures balanced current sharing without external balancing resistors.

Is avalanche rating tested per diode or total device?

The 6000 W avalanche power rating applies per diode under unidirectional stress (tp = 1 µs, Tj = 25°C). When both diodes conduct simultaneously, total avalanche capability remains 6000 W per active junction - confirmed in ST's AN2481 application note with oscilloscope waveforms and calorimetric validation.

Does STPS30L40CG require a gate resistor or snubber circuit?

No - as a Schottky diode, it has no gate and exhibits no reverse recovery charge (Q_rr = 0). Its 10,000 V/µs dV/dt rating and absence of minority carriers eliminate need for snubbers in typical 250–500 kHz SMPS designs, verified in ST's STEVAL-IPFC01V1 reference board test reports.

STPS30L40CG Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: -

Package/Case:: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB

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:: Surface Mount

Supplier Device Package:: D2PAK

STPS30L40CG FAQ

1.How can I place an order for STPS30L40CG through Aetrix?

Please submit a Request for Quotation (RFQ) for STPS30L40CG 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 STPS30L40CG reliable?

The price and inventory of STPS30L40CG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STPS30L40CG is usually 5 days.

3.What payment methods are accepted for STPS30L40CG?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STPS30L40CG transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STPS30L40CG?

STPS30L40CG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STPS30L40CG 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 STPS30L40CG?

For technical support, including STPS30L40CG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STPS30L40CG requirements.

6.How does Aetrix verify that STPS30L40CG is sourced from the original manufacturer or authorized distributors?

All STPS30L40CG 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 STPS30L40CG meets industry standards.

7.What is the process for return or replacement of STPS30L40CG?

All STPS30L40CG units undergo pre-shipment inspection (PSI). If there is an issue with STPS30L40CG, 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 STPS30L40CG part is unused and in its original packaging.

Return procedure for STPS30L40CG:

1.Submit a request within 90 days.

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

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