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Diodes Incorporated SBG3040CT
- Part No.:
- SBG3040CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Datasheet:
-
SBG3040CT.pdf
- Description:
- DIODE ARRAY SCHOT 40V 30A TO-263
- Quantity:
- Payment:
- Shipping:
Inventory:6,530
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Product details
Overview
SBG3040CT from Diodes Incorporated is a 40V, 30A surface-mount Schottky barrier rectifier in TO263 package, featuring 0.55V forward voltage at 15A and 250A non-repetitive surge capability; used for polarity protection and free-wheeling in low-voltage DC-DC converters and motor drive circuits.
For engineers reviewing the SBG3040CT datasheet, SBG3040CT pinout, SBG3040CT application, or SBG3040CT equivalent, key selection criteria include its 40V reverse voltage rating, 30A average output current at TC=100°C, low thermal resistance (1.5°C/W), and suitability for high-frequency switching power supplies requiring minimal conduction loss.
Technical Context
This dual-element Schottky rectifier integrates two independent anode-cathode junctions in a single TO263 thermally enhanced package, with common cathode configuration confirmed by polarity diagram and pin labeling (Pin 1 & Pin 3 = Anode, Pin 2 & Pin 4 = Cathode). Its guard ring die construction provides transient overvoltage protection without external components.
Designed for operation up to +125°C junction temperature, it delivers stable performance under repetitive 60Hz half-wave rectification and handles capacitive-load derated conditions per specification. Total capacitance of 420pF at 1MHz/4V enables predictable high-frequency behavior in snubberless flyback and synchronous rectifier topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum peak repetitive reverse voltage before breakdown; sets safe operating limit in 24–36V input systems. |
| IO @ TC=100°C | 30 A - Continuous average forward current when case temperature is held at 100°C; defines heatsink sizing requirement. |
| VFM @ IF=15A | 0.55 V - Forward voltage drop per element at 15A; directly determines conduction loss (8.25W total for both elements). |
| IFSM | 250 A - Non-repetitive surge current for 8.3ms half-sine; supports motor startup and inrush current handling. |
| RθJC | 1.5 °C/W - Junction-to-case thermal resistance; enables direct mounting to heatsink for efficient thermal management. |
| IRM @ TJ=100°C | 75 mA - Peak reverse leakage at max operating temperature; impacts standby power in always-on applications. |
| CT @ 1MHz | 420 pF - Total capacitance per element; affects switching speed and EMI in >100kHz SMPS designs. |
Pinout & Package
TO263 (D2PAK) thermally optimized surface-mount package with exposed metal tab for heatsinking; molded plastic case rated UL 94V-0, moisture sensitivity level 1, tin-plated terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input terminal for first Schottky diode element; connects to switched node in half-bridge or freewheel path. |
| Pin 2 & Pin 4 | Common Cathode | Shared cathode connection for both diode elements; ties to system ground or output rail for dual-path rectification. |
| Pin 3 | Anode 2 | Input terminal for second Schottky diode element; enables dual independent or parallel rectifier configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Provides intrinsic transient voltage suppression without external TVS, reducing BOM count in industrial power supplies. |
| Low forward voltage drop | 0.55V at 15A minimizes conduction loss-critical for efficiency in 12V/24V automotive and telecom DC-DC stages. |
| High surge capability | 250A IFSM withstands repeated motor commutation spikes and inductive load turn-off transients. |
| Thermally enhanced TO263 | 1.5°C/W RθJC allows direct PCB copper pour heatsinking, eliminating need for discrete thermal interface materials. |
| Low total capacitance | 420pF enables clean turn-off in >200kHz flyback converters, reducing ringing and EMI filter burden. |
Applications
| DC-DC Converter Output Rectification | Automotive Body Control Module Power Supply |
|---|---|
Use Scenario: Secondary-side rectification in isolated 24V-input buck-derived DC-DC converters powering microcontrollers and sensors. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier providing low-loss, high-efficiency unidirectional current flow during transformer reset phase. Use Value: 0.55V VFM reduces conduction loss by ~35% vs. standard PN diodes, improving full-load efficiency by 1.8% at 15A output. | Use Scenario: Polarity protection and reverse-battery safeguard in 12V vehicle body control units. IC Role / Device Role / Timing Role: Common-cathode dual Schottky configured as OR-ing diode pair to block reverse current while enabling hot-swap capability. Use Value: 250A IFSM survives jump-start surges; 40V VRRM covers load-dump transients up to ISO 7637-2 Pulse 5a. |
| BLDC Motor Freewheeling | Industrial PLC I/O Power Conditioning |
Use Scenario: Freewheeling path for three-phase BLDC motor drives using N-channel MOSFET half-bridges. IC Role / Device Role / Timing Role: Fast-recovery Schottky element conducting back-EMF current during PWM off-time across each phase leg. Use Value: 420pF CT limits voltage overshoot during rapid current reversal, reducing gate driver stress and MOSFET avalanche risk. | Use Scenario: Input rectification and hold-up in 24V AC/DC power modules supplying programmable logic controller I/O cards. IC Role / Device Role / Timing Role: High-current Schottky rectifier converting bridge output to stable DC bus with minimal ripple-induced heating. Use Value: 30A IO rating supports 20A continuous loads with 50% margin; TO263 package enables forced-air cooling integration. |
Availability
SBG3040CT is available at Aetrix Electronics and suitable for DC-DC converter output rectification, automotive polarity protection, BLDC motor freewheeling, and industrial PLC power conditioning requiring stable component supply and long-term production continuity.
Supply support for SBG3040CT 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The SBG30xxCT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for high-efficiency, high-reliability power conversion in automotive, industrial, and computing applications where low VFM and robust surge tolerance are critical.
FAQ
What is the pin configuration of SBG3040CT?
SBG3040CT uses a 4-pin TO263 package with Pin 1 and Pin 3 as independent anodes, and Pins 2 & 4 tied internally to a common cathode. This dual-anode/common-cathode arrangement supports parallel or independent rectifier paths. The exposed metal tab is electrically connected to the cathode and serves as the primary thermal path.
Is SBG3040CT suitable for synchronous rectification?
No-SBG3040CT is a passive Schottky rectifier, not a synchronous rectifier IC or MOSFET-based solution. It lacks gate drive circuitry or control logic. However, its low VFM and fast recovery make it a preferred choice for asynchronous rectification in medium-frequency SMPS where simplicity and reliability outweigh marginal efficiency gains from synchronous designs.
Why is SBG3040CT marked "NOT RECOMMENDED FOR NEW DESIGN"?
Diodes Incorporated issued this designation due to planned obsolescence and limited long-term supply assurance. While fully functional and supported for existing production, no second-source or direct replacement has been designated. Customers designing new products should consult Diodes' latest portfolio for alternatives like the SBMG3040CT or APx3040 series with extended lifecycle commitments.
Can SBG3040CT be paralleled for higher current handling?
Yes-its matched dual-diode structure and low thermal resistance allow safe parallel operation of both elements within the same package. When externally paralleling multiple SBG3040CT units, ensure symmetrical PCB layout, equal trace lengths, and shared heatsinking to avoid current imbalance; derate total current by 15% for reliability beyond 30A combined.
SBG3040CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 40 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TO-263
SBG3040CT FAQ
1.How can I place an order for SBG3040CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBG3040CT 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 SBG3040CT reliable?
The price and inventory of SBG3040CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBG3040CT is usually 5 days.
3.What payment methods are accepted for SBG3040CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBG3040CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBG3040CT?
SBG3040CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBG3040CT 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 SBG3040CT?
For technical support, including SBG3040CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBG3040CT requirements.
6.How does Aetrix verify that SBG3040CT is sourced from the original manufacturer or authorized distributors?
All SBG3040CT 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 SBG3040CT meets industry standards.
7.What is the process for return or replacement of SBG3040CT?
All SBG3040CT units undergo pre-shipment inspection (PSI). If there is an issue with SBG3040CT, 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 SBG3040CT part is unused and in its original packaging.
Return procedure for SBG3040CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBG3040CT Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
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BAV99,215
Nexperia USA Inc.
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onsemi
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BAV70LT1G
onsemi
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onsemi
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BAT54S-7-F
Diodes Incorporated
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BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
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BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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