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Diodes Incorporated SBL4030PT
- Part No.:
- SBL4030PT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-3P-3, SC-65-3
- Datasheet:
-
SBL4030PT.pdf
- Description:
- DIODE ARRAY SCHOTT 30V 40A TO-3P
- Quantity:
- Payment:
- Shipping:
Inventory:9,466
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Product details
Overview
SBL4030PT from Diodes Incorporated is a 40A, 30V Schottky barrier rectifier in TO-3P package, featuring 0.58V forward voltage at 20A/25°C, 375A non-repetitive surge capability, and 1.4°C/W thermal resistance junction-to-case-designed for low-voltage, high-frequency inverters and polarity protection circuits.
For engineers reviewing the SBL4030PT datasheet, SBL4030PT pinout, SBL4030PT application, or SBL4030PT equivalent, key selection criteria include forward voltage drop at rated current, thermal resistance under forced convection, surge rating for inductive load switching, and TO-3P mechanical compatibility with standard heatsink mounting patterns.
Technical Context
This device uses Schottky barrier chip guard ring die construction to suppress transient-induced avalanche failure. Its low VF and high IO enable efficient power conversion in 12–24V DC systems where conduction loss dominates thermal design.
The 800pF typical junction capacitance at 4V reverse bias and 1MHz supports fast switching in freewheeling paths up to ~100kHz. Thermal derating follows a linear curve from 40A at TC = 100°C to zero at ~125°C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse blocking voltage before breakdown; sets usable DC bus voltage ceiling |
| IO @ TC=100°C | 40 A - Continuous average forward current with heatsink; defines minimum heatsink thermal mass required |
| VFM @ 20A, 25°C | 0.58 V - Forward voltage drop determining conduction loss (11.6W at 20A) and junction self-heating |
| IFSM (8.3ms) | 375 A - Single half-sine surge rating; validates robustness against motor startup or transformer inrush |
| RJC | 1.4 °C/W - Junction-to-case thermal resistance; enables direct calculation of ΔTJ = Ploss × 1.4 |
| CT @ 1MHz, 4V | 800 pF - Junction capacitance limiting high-frequency reverse recovery noise and EMI generation |
| TJ Range | −55°C to +125°C - Operating junction temperature range; constrains ambient + power loss margin in sealed enclosures |
Pinout & Package
TO-3P package: isolated metal tab (cathode), two insulated leads (anode and cathode terminals). Mounting hole center-to-center spacing 12.27 mm; tab thickness 1.7 mm; overall height 16.8 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connected to unregulated DC source or inductive load return path; requires low-inductance trace routing |
| Cathode (Lead 2) | Output current exit point | Connected to regulated rail or ground reference; carries full load current and must interface with heatsink |
| Metal Tab | Cathode terminal (electrically tied to Lead 2) | Primary thermal path to heatsink; electrically active-requires insulating washer if heatsink is grounded |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Suppresses edge leakage and transient-induced localized avalanche, improving reliability in noisy industrial environments |
| Low VF at high current | 0.58V @ 20A reduces conduction loss by ≥35% vs. comparable Si diodes, lowering thermal stress on adjacent components |
| High IFSM/IO ratio (9.4:1) | Enables handling of short-duration overloads without bond wire fusing-critical for motor drive freewheeling |
| RoHS-compliant bright tin plating | Ensures solderability per MIL-STD-202 Method 208 and eliminates lead-based contamination in final assembly |
| UL 94V-0 molded plastic case | Provides flame-retardant housing meeting safety standards for enclosed power supplies and industrial controls |
Applications
| DC-DC Converter Output Rectification | Automotive Alternator Freewheeling |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in 12V/24V isolated flyback or forward converters. IC Role / Device Role / Timing Role: Unidirectional current valve conducting during transformer reset phase; no timing control required. Use Value: 0.58V VF cuts conduction loss by >5W vs. Si diode at 20A, reducing heatsink size and enabling higher power density. | Use Scenario: Suppressing back-EMF spikes across alternator field windings during regulator turn-off. IC Role / Device Role / Timing Role: Passive clamping diode placed across inductive load; conducts only during voltage reversal events. Use Value: 375A IFSM withstands alternator field collapse transients without degradation, extending system service life. |
| Polarity Protection Circuit | Low-Voltage Inverter DC Bus Clamp |
Use Scenario: Reverse-input protection in 24V battery-powered industrial controllers with hot-swap capability. IC Role / Device Role / Timing Role: Series-connected blocking element; conducts only when input polarity is correct. Use Value: 40A continuous rating supports peak loads up to 960W without derating, eliminating need for parallel devices. | Use Scenario: Clamping inductive kickback from H-bridge IGBTs in 30V solar microinverters. IC Role / Device Role / Timing Role: Bidirectional clamp (with series resistor) limiting DC bus overvoltage during regeneration. Use Value: 30V VRRM matches nominal bus voltage, while 800pF CT minimizes capacitive loading on gate drivers. |
Availability
SBL4030PT is available at Aetrix Electronics and suitable for DC-DC converter output rectification, automotive alternator freewheeling, and polarity protection circuits requiring stable component supply despite end-of-life status.
Supply support for SBL4030PT 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 centers across Asia and manufacturing in China, Taiwan, and the US.
The SBL40xxPT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical 12–60V power conversion systems where low VF and high surge tolerance are mandatory.
FAQ
Is SBL4030PT still in production?
No. Diodes Incorporated officially discontinued SBL4030PT as of July 2015 (DS30236 Rev. 4). It is marked "OBSOLETE – PART DISCONTINUED" in all official documentation. Aetrix Electronics maintains limited legacy stock with full traceability and provides last-time-buy support including extended warranty and cross-reference guidance.
What is the cathode connection configuration in TO-3P package?
In SBL4030PT, the metal tab and Lead 2 (second lead) are internally connected to the cathode. The anode is exclusively on Lead 1. The tab must be electrically isolated from the heatsink unless the system design intentionally references the cathode to chassis ground.
Can SBL4030PT replace SBL4040PT in a 30V design?
Yes-only if the circuit's maximum reverse voltage never exceeds 30V. SBL4030PT has lower VRRM (30V vs. 40V) but identical IO, VF, and thermal characteristics. Derating margin shrinks; verify worst-case transients remain below 30V to prevent catastrophic failure.
What is the recommended minimum heatsink thermal resistance?
At 40A and 25°C ambient, assuming 0.58V VF, power dissipation is ~23.2W. With RJC = 1.4°C/W and max TJ = 125°C, RCA must be ≤ 3.3°C/W to maintain TC ≤ 100°C. A commercially available 2.5°C/W extruded aluminum heatsink meets this requirement.
SBL4030PT 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):
- 30 V
- Current - Average Rectified (Io) (per Diode):
- 40A
- Voltage - Forward (Vf) (Max) @ If:
- 580 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 30 V
- Operating Temperature - Junction:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-3P
SBL4030PT FAQ
1.How can I place an order for SBL4030PT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBL4030PT 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 SBL4030PT reliable?
The price and inventory of SBL4030PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBL4030PT is usually 5 days.
3.What payment methods are accepted for SBL4030PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBL4030PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBL4030PT?
SBL4030PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBL4030PT 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 SBL4030PT?
For technical support, including SBL4030PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBL4030PT requirements.
6.How does Aetrix verify that SBL4030PT is sourced from the original manufacturer or authorized distributors?
All SBL4030PT 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 SBL4030PT meets industry standards.
7.What is the process for return or replacement of SBL4030PT?
All SBL4030PT units undergo pre-shipment inspection (PSI). If there is an issue with SBL4030PT, 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 SBL4030PT part is unused and in its original packaging.
Return procedure for SBL4030PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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