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Diodes Incorporated SBL3040CT
- Part No.:
- SBL3040CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SBL3040CT.pdf
- Description:
- DIODE ARR SCHOTT 40V 15A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:8,558
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Product details
Overview
SBL3040CT from Diodes Incorporated is a 40V, 30A dual common-cathode Schottky barrier rectifier in TO-220AB package, designed for high-efficiency DC/DC conversion, free-wheeling, and polarity protection in low-voltage power supplies. It delivers 0.55V forward voltage at 15A, 250A non-repetitive surge capability, and 1.5°C/W junction-to-case thermal resistance.
For engineers reviewing the SBL3040CT datasheet, SBL3040CT pinout, SBL3040CT application, or SBL3040CT equivalent, key selection criteria include peak reverse voltage (40V), average output current (30A @ TC=100°C), forward voltage drop (0.55V @ 15A), thermal resistance (1.5°C/W), and TO-220AB mechanical compatibility with standard heatsinks.
Technical Context
The SBL3040CT integrates two independent Schottky diodes sharing a common cathode terminal, enabling dual-output or redundant rectification paths in single-package form. Its guard ring die construction enhances transient voltage immunity, while low VF and high IFSM support high-frequency switching converters operating up to several hundred kHz.
Designed for surface-mount-compatible through-hole mounting, it operates across –55°C to +125°C junction temperature range with 10,000 V/μs critical rate of rise of reverse voltage-critical for snubberless inductive load commutation and automotive load-dump resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse blocking voltage before avalanche conduction begins |
| IO | 30 A - Average rectified current sustainable at case temperature of 100°C with heatsink |
| VFM | 0.55 V @ 15A - Forward voltage drop determining conduction loss and thermal load at typical operating point |
| IFSM | 250 A - Peak non-repetitive surge current handling capability for motor startup or capacitor charging events |
| RθJC | 1.5 °C/W - Thermal resistance from junction to case, defining minimum heatsink requirement for thermal design |
| CT | 450 pF @ 1 MHz - Junction capacitance affecting high-frequency switching noise and EMI filtering requirements |
| dv/dt | 10,000 V/μs - Critical rate-of-rise immunity enabling reliable operation without external snubbers in inductive circuits |
Pinout & Package
Package: TO-220AB - Three-terminal, insulated plastic case with metal tab (cathode-connected) for direct heatsink mounting; UL 94V-0 rated, 2.24 g mass, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode A) | Anode of first diode | Input terminal for first rectification path; electrically isolated from Pin 2 and Pin 3 |
| Pin 2 (Cathode) | Common cathode | Shared output node for both diodes; internally bonded to metal tab for thermal and electrical connection |
| Pin 3 (Anode B) | Anode of second diode | Input terminal for second independent rectification path; electrically isolated from Pin 1 and Pin 2 |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Improves transient voltage immunity and prevents edge breakdown during fast dv/dt events |
| Low forward voltage drop | 0.55 V at 15A reduces conduction losses by ~30% vs. comparable silicon rectifiers, lowering thermal stress |
| High surge current rating | 250 A IFSM supports robust operation during inrush or fault conditions without bond-wire fusing |
| TO-220AB thermal interface | Metal tab directly connects cathode to heatsink, enabling 1.5°C/W RθJC with minimal thermal interface resistance |
| RoHS-compliant tin finish | Lead-free terminations meet MIL-STD-202 solderability standards and eliminate Pb-based assembly concerns |
Applications
| DC/DC Converter Output Stage | Automotive Body Control Module |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 12V–48V isolated buck-derived converters powering infotainment systems. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier providing low-loss, high-current output rectification with shared cathode return path. Use Value: 0.55V VF minimizes conduction loss at 20–30A loads, improving efficiency by ≥2.5% over 60V Si alternatives and reducing heatsink size. | Use Scenario: Reverse-polarity protection and freewheeling clamp for 12V solenoid drivers in door lock actuators. IC Role / Device Role / Timing Role: Dual-diode configuration enables independent protection for two actuator coils while sharing ground return. Use Value: 250A IFSM withstands inductive kickback from 100ms coil de-energization; 10,000 V/μs dv/dt rating eliminates need for external RC snubbers. |
| Industrial PLC Power Supply | Server Fan Controller |
Use Scenario: Input rectification and hold-up capacitor charging in 24V AC/DC front-end supplies with high reliability requirements. IC Role / Device Role / Timing Role: Dual common-cathode topology allows parallel use of both anodes for higher current capacity or redundancy. Use Value: 30A IO rating at 100°C case temperature ensures stable operation under continuous full-load conditions in enclosed cabinets. | Use Scenario: Freewheeling path for PWM-controlled 12V brushless fan motors in data center server chassis. IC Role / Device Role / Timing Role: Single-package dual diode provides compact, thermally efficient flyback path for two-phase motor drive outputs. Use Value: TO-220AB metal tab enables direct mounting to aluminum chassis, achieving <10°C junction rise above ambient at 5A per anode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-30CPH04 | 45V VRRM, 30A IO, 0.57V VF @ 15A, TO-247AC package | Higher voltage margin but larger footprint and no common-cathode dual configuration | Select when >40V blocking is required and board space permits TO-247 mounting |
| ON Semiconductor MBR3045CT | 45V VRRM, 30A IO, 0.62V VF @ 15A, TO-220AB package | Same footprint but higher forward drop and lower dv/dt rating (5,000 V/μs) | Select when cost sensitivity outweighs efficiency and transient performance needs |
Compared with VS-30CPH04 and MBR3045CT, the SBL3040CT offers optimal balance of 40V blocking, 0.55V low VF, 10,000 V/μs dv/dt, and dual-common-cathode integration in TO-220AB-making it preferred for space-constrained, high-efficiency 12–24V industrial and automotive rectification where thermal and transient performance are critical.
Availability
SBL3040CT is available at Aetrix Electronics and suitable for DC/DC converter output stages, automotive body control modules, industrial PLC power supplies, and server fan controllers requiring stable component supply and long-term manufacturability assurance.
Supply support for SBL3040CT 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, specializing in high-performance, high-reliability components for power management, signal integrity, and protection applications.
The SBL series targets high-current Schottky rectification in demanding power conversion environments, emphasizing low VF, robust surge handling, and thermal efficiency in standard packages like TO-220AB.
FAQ
Is the SBL3040CT pin-compatible with the SBL3030CT?
Yes-the SBL3040CT and SBL3030CT share identical TO-220AB package dimensions, pinout (Anode–Cathode–Anode), and mechanical mounting. The only difference is VRRM: 40V vs. 30V. Substitution is permissible if system reverse voltage remains ≤40V and thermal design accommodates identical power dissipation.
Can the SBL3040CT be used without a heatsink?
No-its 30A average current rating assumes TC = 100°C with adequate heatsinking. At ambient temperatures >50°C or continuous >10A load, junction temperature exceeds 125°C without thermal management. Derating curves in DS30022 show usable current drops to ~8A at 70°C ambient with no heatsink.
What is the significance of the guard ring construction in this device?
The guard ring is a doped semiconductor region surrounding the active junction edge. It prevents premature avalanche breakdown at the silicon periphery during fast transients, raising the effective dv/dt immunity to 10,000 V/μs and improving reliability in inductive switching applications such as motor drives and solenoid controls.
Does the metal tab on the TO-220AB package carry electrical potential?
Yes-the metal tab is electrically connected to the common cathode (Pin 2). When mounted to a heatsink, the heatsink becomes part of the cathode circuit. Electrical isolation (e.g., mica washer or sil-pad) is required if the heatsink is grounded or at a different potential than the cathode net.
SBL3040CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-220-3
- 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:
- 1 mA @ 40 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SBL3040CT FAQ
1.How can I place an order for SBL3040CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBL3040CT 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 SBL3040CT reliable?
The price and inventory of SBL3040CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBL3040CT is usually 5 days.
3.What payment methods are accepted for SBL3040CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBL3040CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBL3040CT?
SBL3040CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBL3040CT 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 SBL3040CT?
For technical support, including SBL3040CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBL3040CT requirements.
6.How does Aetrix verify that SBL3040CT is sourced from the original manufacturer or authorized distributors?
All SBL3040CT 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 SBL3040CT meets industry standards.
7.What is the process for return or replacement of SBL3040CT?
All SBL3040CT units undergo pre-shipment inspection (PSI). If there is an issue with SBL3040CT, 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 SBL3040CT part is unused and in its original packaging.
Return procedure for SBL3040CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBL3040CT Tags
-
BAV99-7-F
Diodes Incorporated
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BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
onsemi
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BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
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BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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