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Diodes Incorporated SBL2045CT
- Part No.:
- SBL2045CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SBL2045CT.pdf
- Description:
- DIODE ARR SCHOTT 45V 20A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:4,178
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Product details
Overview
SBL2045CT from Diodes Incorporated is a 20A, 45V dual common-cathode Schottky barrier rectifier in TO-220AB package, designed for low-voltage, high-frequency DC/DC conversion, free-wheeling, and polarity protection. It features 0.55V forward voltage at 10A (25°C), 250A non-repetitive surge capability, and 2.8°C/W thermal resistance junction-to-case.
For engineers reviewing the SBL2045CT datasheet, SBL2045CT pinout, SBL2045CT application, or SBL2045CT equivalent, key selection criteria include forward voltage drop at operating current, thermal derating behavior, reverse leakage at elevated temperature, and TO-220AB mechanical mounting compatibility with heatsink interfaces.
Technical Context
This dual common-cathode Schottky rectifier integrates two independent anode terminals (Pins 1 and 3) sharing a single cathode (Pin 2), enabling synchronous half-wave or dual-output configurations. Its guard-ring die construction provides transient immunity without external TVS components.
Designed for operation up to 150°C junction temperature, it maintains <1.0mA reverse leakage at 45V and 25°C, and <50mA at 100°C - critical for battery-powered systems where standby power loss must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - Maximum peak repetitive reverse voltage; defines safe blocking range in 36V nominal bus applications. |
| IO @ TC=95°C | 20 A - Average rectified output current with case temperature held at 95°C using heatsink; sets continuous power handling limit. |
| VFM @ IF=10A, 25°C | 0.55 V - Forward voltage drop at 10A; directly determines conduction loss (5.5W per diode at 10A). |
| IFSM (8.3ms) | 250 A - Non-repetitive surge rating; supports motor startup or capacitor charging transients without failure. |
| RJC | 2.8 °C/W - Junction-to-case thermal resistance; enables thermal design with known heatsink interface resistance. |
| IRM @ 45V, 100°C | 50 mA - Peak reverse leakage at max rated voltage and elevated temperature; impacts standby power in always-on systems. |
Pinout & Package
TO-220AB package with isolated tab (electrically connected to Pin 2, cathode), standard through-hole mounting, UL 94V-0 molded plastic body, and solderable plated leads per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Independent anode input for first rectifier path; marked with white stripe on body. |
| Pin 2 | Cathode (Common) | Shared cathode node for both diodes; electrically connected to metal tab; requires isolation if mounted to grounded heatsink. |
| Pin 3 | Anode 2 | Independent anode input for second rectifier path; unmarked side of device body. |
Key Features
| Feature | Design Value |
|---|---|
| Guard-ring die construction | Provides intrinsic transient voltage suppression without external components, reducing BOM count in automotive load-dump environments. |
| Low forward voltage (0.55V @ 10A) | Reduces conduction losses by ~30% vs. comparable 45V fast recovery diodes, improving efficiency in 12–24V SMPS outputs. |
| 250A surge rating (8.3ms) | Supports high inrush currents in industrial power supplies with bulk capacitors ≥10,000µF without derating. |
| TO-220AB with isolated tab | Enables direct heatsink mounting while maintaining electrical isolation between cathode and chassis ground when required. |
Applications
| DC/DC Converter Output Rectification | Automotive Polarity Protection |
|---|---|
Use Scenario: Secondary-side synchronous rectification in 12V-to-5V/3.3V buck converters for infotainment ECUs. IC Role / Device Role / Timing Role: Dual-anode configuration allows independent control of two output rails or redundancy in safety-critical modules. Use Value: 0.55V VFM reduces output stage loss by 1.2W per diode vs. Si FRD alternatives, lowering thermal stress on PCB layout. | Use Scenario: Reverse-voltage protection at battery input of telematics control units (TCUs) exposed to jump-start events. IC Role / Device Role / Timing Role: Common-cathode topology enables single-point grounding of protected loads while blocking reverse current during incorrect battery connection. Use Value: Guard-ring structure withstands ISO 7637-2 pulse 1 (−150V/50ms) without clamping diode or fuse, simplifying protection circuitry. |
| Industrial Free-Wheeling Diode | Server PSU Hold-Up Capacitor Charging |
Use Scenario: Snubberless flyback diode across 24V solenoid drivers in PLC I/O modules. IC Role / Device Role / Timing Role: Handles 250A inductive turn-off spikes with <10ns recovery time, eliminating voltage overshoot beyond MOSFET VDS rating. Use Value: Low RJC (2.8°C/W) allows operation at 95°C case temperature without forced air, supporting fanless enclosure designs. | Use Scenario: Inrush limiting and hold-up capacitor pre-charge in redundant 48V server PSUs during hot-swap events. IC Role / Device Role / Timing Role: Dual-anode structure permits staged charging of parallel capacitor banks via separate gate-controlled paths. Use Value: 20A average current rating supports >100A peak charge pulses with <0.5V drop, minimizing voltage sag during cold-start sequencing. |
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-20BQ045 | Same 45V VRRM, 20A IO, but TO-220AC package with non-isolated tab; RJC = 3.0°C/W. | Requires insulating washer for grounded heatsinks; higher thermal resistance limits continuous current in compact enclosures. | Select when cost sensitivity outweighs thermal margin and tab isolation is not required. |
| ON Semiconductor MBR2045CT | Identical pinout and ratings, but uses different die process resulting in 0.60V VFM @ 10A and 60mA IRM @ 100°C. | Higher conduction loss and leakage reduce efficiency in thermally constrained or battery-backed systems. | Acceptable for non-critical industrial supplies where 50mV VFM delta and 10mA extra leakage are tolerable. |
Compared with VS-20BQ045 and MBR2045CT, the SBL2045CT offers superior thermal performance (2.8°C/W), lower forward voltage (0.55V), and integrated guard-ring protection - making it preferred for automotive and high-reliability 24V/48V power systems where efficiency, surge resilience, and heatsink integration are prioritized.
Availability
SBL2045CT is available at Aetrix Electronics and suitable for DC/DC converter output rectification, automotive polarity protection, and industrial free-wheeling applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for SBL2045CT 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 and manufacturing operations across Asia and the US.
The SBL20xxCT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical 12–48V power conversion in automotive, industrial, and computing infrastructure.
FAQ
Is the metal tab of SBL2045CT electrically connected to any pin?
Yes, the metal tab is internally connected to Pin 2 (common cathode). This requires electrical isolation (e.g., mica washer or thermal pad) when mounting to a grounded heatsink to prevent shorting the cathode node to system ground.
What is the maximum allowable case temperature for continuous 20A operation?
The datasheet specifies 20A average current at TC = 95°C. Operation above this temperature requires linear derating per Figure 1 - e.g., 15A at 110°C, 10A at 125°C - based on measured thermal resistance and heatsink performance.
Can SBL2045CT replace SBL2040CT in an existing design?
Yes, with full functional compatibility: both share identical TO-220AB package, pinout, and thermal characteristics. The only difference is VRRM (40V → 45V), providing 5V additional reverse margin without affecting layout, thermal design, or drive requirements.
Does SBL2045CT require a minimum reverse voltage to achieve specified capacitance?
No - junction capacitance (650pF typical) is measured at 4.0V reverse bias per Note 2, but the device operates reliably down to 0V reverse. Capacitance decreases with increasing reverse voltage, as shown in Figure 4, and does not require bias to function as a rectifier.
SBL2045CT 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):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 45 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SBL2045CT FAQ
1.How can I place an order for SBL2045CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBL2045CT 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 SBL2045CT reliable?
The price and inventory of SBL2045CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBL2045CT is usually 5 days.
3.What payment methods are accepted for SBL2045CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBL2045CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBL2045CT?
SBL2045CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBL2045CT 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 SBL2045CT?
For technical support, including SBL2045CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBL2045CT requirements.
6.How does Aetrix verify that SBL2045CT is sourced from the original manufacturer or authorized distributors?
All SBL2045CT 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 SBL2045CT meets industry standards.
7.What is the process for return or replacement of SBL2045CT?
All SBL2045CT units undergo pre-shipment inspection (PSI). If there is an issue with SBL2045CT, 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 SBL2045CT part is unused and in its original packaging.
Return procedure for SBL2045CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBL2045CT 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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BAT54SLT1G
onsemi
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BAV70LT1G
onsemi
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BAT54CLT1G
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
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