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Diodes Incorporated SBL3040PT
- Part No.:
- SBL3040PT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-3P-3, SC-65-3
- Datasheet:
-
SBL3040PT.pdf
- Description:
- DIODE ARRAY SCHOTT 40V 15A TO-3P
- Quantity:
- Payment:
- Shipping:
Inventory:2,902
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Product details
Overview
SBL3040PT from Diodes Incorporated is a 40V, 30A TO-3P dual common-cathode Schottky barrier rectifier optimized for low-voltage, high-frequency DC/DC conversion, free-wheeling, and polarity protection in industrial power supplies and motor drives. It features 0.70V forward voltage at 15A (25°C), 275A non-repetitive surge capability, and 2.0°C/W junction-to-case thermal resistance.
For engineers reviewing the SBL3040PT datasheet, SBL3040PT pinout, SBL3040PT application, or SBL3040PT equivalent, key selection criteria include its 40V reverse blocking rating, TO-3P package thermal performance, dual common-cathode configuration, and suitability for high-efficiency 12V/24V bus rectification and synchronous rectifier replacement.
Technical Context
This device integrates two Schottky diode elements in a single TO-3P thermally enhanced plastic package with guard ring die construction for transient robustness. Its low VF and high IFSM support high-current switching paths where conduction loss minimization and surge resilience are critical.
The dual common-cathode topology enables independent anode control per element while sharing a low-inductance cathode connection-ideal for interleaved or parallel rectifier configurations in multi-phase converters and redundant power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum repetitive reverse voltage; defines safe operating limit in 24V–36V bus applications with margin. |
| IO | 30 A @ TC = 95°C - Continuous average forward current; requires heatsink mounting to sustain full load. |
| VFM | 0.70 V @ IF = 15A, 25°C - Low conduction loss enabling >92% efficiency in 12V output stages. |
| IFSM | 275 A (8.3ms half-sine) - Withstands inrush and short-circuit surges without failure in motor drive freewheeling. |
| RθJC | 2.0 °C/W - Enables direct heatsink mounting for thermal management in compact industrial power modules. |
| CT | 1100 pF @ 1MHz, 4V - Low junction capacitance reduces switching noise and EMI in high-frequency SMPS designs. |
Pinout & Package
Package: TO-3P (isolated metal tab), molded plastic case with UL 94V-0 rating, tin-plated terminals, 5.6g typical weight. Cathode terminal electrically connected to metal tab.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode 1 (Lead 1) | Input anode for first diode element | Accepts positive input from primary-side switch node in flyback or buck-derived topologies. |
| Anode 2 (Lead 2) | Input anode for second diode element | Supports dual-output or interleaved rectification; independent switching control possible. |
| Cathode (Metal Tab) | Common cathode / thermal path | Electrically and thermally tied to heatsink; must be insulated if chassis-ground referenced. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Enhances transient voltage immunity and prevents edge breakdown during fast dv/dt events in inverter outputs. |
| Dual common-cathode configuration | Reduces PCB layout area and parasitic inductance versus discrete dual-diode solutions in dual-rail systems. |
| Low forward voltage drop | 0.70V at 15A cuts conduction loss by ~35% vs. comparable silicon rectifiers, lowering thermal design burden. |
| High surge current rating | 275A peak supports motor startup currents and capacitor charging surges without derating. |
Applications
| Industrial DC Power Supply | Automotive Body Control Module |
|---|---|
Use Scenario: 24V input rectification and reverse-polarity protection in DIN-rail mounted AC/DC power supplies. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier providing low-loss input stage and fail-safe polarity guard. Use Value: 0.70V VF reduces heat sink size by 40% vs. standard diodes; TO-3P tab enables direct thermal coupling to chassis. | Use Scenario: Free-wheeling path for 12V solenoid and relay drivers in BCM power distribution units. IC Role / Device Role / Timing Role: Dual-element clamp suppressing inductive kickback across multiple loads simultaneously. Use Value: 275A IFSM handles simultaneous coil de-energization; common cathode simplifies grounding to vehicle chassis. |
| Server PSU Secondary Side | Renewable Energy Inverter |
Use Scenario: Output rectification in 12V/48V server VRMs with tight thermal constraints. IC Role / Device Role / Timing Role: High-current Schottky rectifier replacing MOSFET synchronous designs where gate drive complexity is undesirable. Use Value: 30A continuous rating at 95°C case temperature enables compact, fanless PSU designs without active cooling. | Use Scenario: DC link protection and freewheeling in bi-directional solar microinverters. IC Role / Device Role / Timing Role: Bidirectional clamping device managing regenerative energy during grid synchronization transients. Use Value: Guard ring structure withstands 100V/µs dv/dt from IGBT switching; 40V rating matches PV string voltage margins. |
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 | Same 40V VRRM, 30A IO, but TO-247AC package; RθJC = 1.7°C/W; VF = 0.68V @ 15A. | Lower thermal resistance suits higher ambient environments; larger footprint requires more PCB area. | Prefer when thermal budget is tighter than board space constraints. |
| ON Semiconductor MBR3045CT | 45V VRRM, same TO-220AB-3L package; VF = 0.72V @ 15A; IFSM = 220A. | Higher voltage margin but lower surge rating; not rated for 275A transients. | Select only if system reverse voltage exceeds 40V or surge events are infrequent. |
Compared with VS-30CPH04 and MBR3045CT, the SBL3040PT offers superior surge robustness (275A) and TO-3P mechanical ruggedness for industrial vibration environments, though with slightly higher thermal resistance than TO-247 alternatives.
Availability
SBL3040PT is available at Aetrix Electronics and suitable for industrial DC power supplies, automotive body control modules, server PSUs, and renewable energy inverters requiring stable component supply and long-term manufacturability.
Supply support for SBL3040PT 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-reliability power management, signal integrity, and protection devices for industrial, computing, and automotive markets.
The SBL3040PT belongs to Diodes' high-current Schottky rectifier product line, engineered for efficiency-critical 12V–48V power conversion where low VF, high surge tolerance, and thermal reliability are prioritized over ultra-low leakage.
FAQ
Is the SBL3040PT RoHS compliant?
Yes, the SBL3040PT features a lead-free finish and is RoHS compliant per EU Directive 2002/95/EC revision 13.2.2003, with exemptions applied for glass and high-temperature solder per Annex Notes 5 and 7. Tin-plated terminals meet MIL-STD-202 Method 208 solderability requirements.
Can the SBL3040PT be used in surface-mount designs?
No - the SBL3040PT uses a through-hole TO-3P package with three leads and an isolated metal tab designed for bolt-down heatsink mounting. It is not compatible with reflow or wave soldering processes and requires mechanical fastening and thermal interface material for proper thermal performance.
What is the maximum operating temperature for continuous use?
The SBL3040PT supports continuous operation up to +150°C junction temperature, with rated average output current derated linearly from 30A at 95°C case temperature to zero at 150°C. Derating curves in Figure 1 confirm usable current at 125°C case is approximately 18A.
Does the device require external snubbing in high-dv/dt applications?
Not typically - the guard ring die construction provides inherent transient voltage suppression, and the device is characterized for reliable operation at ≥100V/µs dv/dt. However, in >500V/µs environments (e.g., SiC inverter outputs), a small RC snubber across each anode-to-cathode may further reduce ringing and EMI.
SBL3040PT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-3P-3, SC-65-3
- 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-3P
SBL3040PT FAQ
1.How can I place an order for SBL3040PT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBL3040PT 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 SBL3040PT reliable?
The price and inventory of SBL3040PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBL3040PT is usually 5 days.
3.What payment methods are accepted for SBL3040PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBL3040PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBL3040PT?
SBL3040PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBL3040PT 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 SBL3040PT?
For technical support, including SBL3040PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBL3040PT requirements.
6.How does Aetrix verify that SBL3040PT is sourced from the original manufacturer or authorized distributors?
All SBL3040PT 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 SBL3040PT meets industry standards.
7.What is the process for return or replacement of SBL3040PT?
All SBL3040PT units undergo pre-shipment inspection (PSI). If there is an issue with SBL3040PT, 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 SBL3040PT part is unused and in its original packaging.
Return procedure for SBL3040PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBL3040PT Tags
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