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Diodes Incorporated SBL2040CT
- Part No.:
- SBL2040CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SBL2040CT.pdf
- Description:
- DIODE ARR SCHOTT 40V 20A TO2203
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
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Product details
Overview
SBL2040CT from Diodes Incorporated is a 20A dual common-cathode Schottky barrier rectifier in TO-220AB package, rated for 40V peak repetitive reverse voltage, 0.55V forward voltage drop at 10A/25°C, and 250A non-repetitive surge current; used in low-voltage DC power supplies for polarity protection and freewheeling in SMPS and motor drives.
For engineers reviewing the SBL2040CT datasheet, SBL2040CT pinout, SBL2040CT application, or SBL2040CT equivalent, key selection criteria include forward voltage consistency at high current, thermal resistance (2.8°C/W), junction capacitance (650pF), surge robustness (250A), and TO-220AB mechanical compatibility with standard heatsinks.
Technical Context
This dual-diode configuration shares a common cathode terminal (Pin 2), with independent anodes on Pins 1 and 3 - enabling synchronous rectification or dual-channel output in center-tapped transformer designs. The guard-ring die construction enhances transient immunity without external TVS components.
Thermal performance is defined under heatsink-mounted conditions (RθJC = 2.8°C/W), and derating applies for capacitive loads (−20% current rating). Junction temperature range spans −65°C to +150°C, supporting industrial and automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum allowable reverse voltage before breakdown; sets system-level isolation margin in 24–36V DC bus applications. |
| IO | 20 A - Average rectified current per diode at TC = 95°C; defines continuous power-handling capability with heatsink. |
| VFM | 0.55 V @ 10A, 25°C - Low conduction loss enables >92% efficiency in 5–12V output stages at full load. |
| IFSM | 250 A - Peak surge withstand for 8.3ms half-sine; supports inrush limiting in battery-charged systems. |
| RθJC | 2.8 °C/W - Thermal resistance from junction to case; determines minimum heatsink size for 20A continuous operation. |
| Cj | 650 pF @ 4V, 1MHz - Junction capacitance impacts switching noise and EMI in high-frequency (>100kHz) converters. |
| Tj/TSTG | −65°C to +150°C - Wide operating range allows use in unregulated ambient environments like industrial motor controls. |
Pinout & Package
Package: TO-220AB, single-row 3-lead molded plastic case with isolated tab (electrically connected to Pin 2, cathode); UL 94V-0 rated; weight ≈2.24 g; mountable in any orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode 1 | Input terminal for first rectifier path; electrically isolated from Pin 3; connects to AC source or transformer winding. |
| Pin 2 | Common Cathode | Shared output node for both diodes; tab-connected and thermally critical; must be soldered to heatsink for rated current. |
| Pin 3 | Anode 2 | Input terminal for second rectifier path; independent of Pin 1; enables dual-output or center-tap full-wave rectification. |
Key Features
| Feature | Design Value |
|---|---|
| Guard-ring die construction | Improves transient voltage immunity without adding external clamping components in 24V industrial power rails. |
| Low forward voltage (0.55V) | Reduces conduction loss by ≥35% vs. comparable silicon rectifiers, lowering thermal design burden in compact enclosures. |
| High surge rating (250A) | Withstands repeated cold-start surges in battery-powered UPS and telecom rectifier modules without degradation. |
| TO-220AB mechanical standardization | Enables drop-in replacement in legacy PCB footprints designed for 20A dual-Schottky rectifiers across multiple vendors. |
| UL 94V-0 flammability rating | Meets safety compliance for enclosed power supplies in Class 2 and limited-power circuits per UL/IEC 62368-1. |
Applications
| DC Power Supply Rectification | Motor Drive Freewheeling |
|---|---|
Use Scenario: 24V input, 12V/15A output SMPS using center-tapped transformer and synchronous rectification. IC Role / Device Role / Timing Role: Dual-anode Schottky rectifier providing low-loss bidirectional current path during transformer reset and output conduction phases. Use Value: 0.55V VFM reduces average conduction loss to <1.1W per diode, enabling passive cooling in fanless 180W supplies. | Use Scenario: H-bridge BLDC driver with regenerative braking in HVAC blowers and pump controllers. IC Role / Device Role / Timing Role: Freewheeling path for inductive back-EMF during PWM off-time; common-cathode topology simplifies layout and minimizes loop inductance. Use Value: 250A IFSM handles 3× rated motor stall current without failure, improving field reliability over 10-year service life. |
| Polarity Protection | Telecom DC-DC Input Stage |
Use Scenario: Reverse-voltage protection at 48V input of PoE-powered edge switches and IoT gateways. IC Role / Device Role / Timing Role: Series-connected anode-to-input, cathode-to-load; blocks reverse connection while conducting forward with minimal dropout. Use Value: 40V VRRM provides 2× margin over 48V nominal rail, and 0.55V drop preserves >98% input voltage under 10A load. | Use Scenario: Input rectification stage in 48V-to-12V isolated DC-DC modules for base station radios and remote radio units. IC Role / Device Role / Timing Role: Primary-side bridge rectifier replacing discrete diodes; dual configuration supports interleaved or split-bus architectures. Use Value: 650pF Cj limits high-frequency switching noise coupling into control circuitry, easing EMI filter design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual common-cathode Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-20CPH04 | Same 40V VRRM, but higher VFM = 0.62V @ 10A; RθJC = 3.0°C/W. | Marginally lower efficiency at full load; requires slightly larger heatsink for same TJ. | Preferred where Vishay qualification or long-term supply continuity is mandated. |
| ON Semiconductor MBR2040CT | Identical VRRM, VFM, and RθJC; same TO-220AB footprint and pinout. | No functional or layout change required; validated in automotive-grade designs per AEC-Q101. | Drop-in alternative when automotive qualification or dual-source assurance is required. |
Compared with SBL2040CT, VS-20CPH04 trades 0.07V higher forward drop for broader global distribution, while MBR2040CT offers identical electricals plus AEC-Q101 qualification-making it optimal for automotive and mission-critical industrial deployments.
Availability
SBL2040CT is available at Aetrix Electronics and suitable for DC power supply rectification, motor drive freewheeling, and polarity protection requiring stable component supply across industrial automation, telecom infrastructure, and embedded power systems.
Supply support for SBL2040CT 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 Taiwan and China.
The SBL20xxCT series belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for high-efficiency, low-noise DC power conversion in space-constrained industrial and communications equipment.
FAQ
Is the SBL2040CT RoHS compliant and halogen-free?
Yes, SBL2040CT meets RoHS Directive 2011/65/EU and is certified halogen-free per IEC 61249-2-21. The device uses lead-free matte tin-plated leads and complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 1, with unlimited floor life at ≤30°C/85% RH.
Can SBL2040CT be used in parallel for higher current?
No - paralleling SBL2040CT devices is not recommended due to forward voltage mismatch between units, which causes current imbalance and thermal runaway. For >20A applications, select a single higher-rated part such as SBL3040CT or implement active current-sharing circuitry.
What is the maximum recommended case temperature for continuous operation?
The datasheet specifies IO = 20A at TC = 95°C. Operation above this temperature requires linear derating: current decreases by ~0.21A/°C up to TC = 150°C, where IO reaches zero. Reliable long-term operation is maintained below 125°C case temperature with adequate heatsinking.
Does the TO-220AB tab connect to a specific pin internally?
Yes, the metal tab is electrically connected to Pin 2 (common cathode) and must be insulated from chassis ground unless the cathode node is referenced to system ground. Mounting without insulating hardware creates a short between Pin 2 and heatsink, potentially damaging downstream circuitry.
SBL2040CT 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):
- 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 @ 40 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SBL2040CT FAQ
1.How can I place an order for SBL2040CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBL2040CT 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 SBL2040CT reliable?
The price and inventory of SBL2040CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBL2040CT is usually 5 days.
3.What payment methods are accepted for SBL2040CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBL2040CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBL2040CT?
SBL2040CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBL2040CT 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 SBL2040CT?
For technical support, including SBL2040CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBL2040CT requirements.
6.How does Aetrix verify that SBL2040CT is sourced from the original manufacturer or authorized distributors?
All SBL2040CT 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 SBL2040CT meets industry standards.
7.What is the process for return or replacement of SBL2040CT?
All SBL2040CT units undergo pre-shipment inspection (PSI). If there is an issue with SBL2040CT, 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 SBL2040CT part is unused and in its original packaging.
Return procedure for SBL2040CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBL2040CT Tags
-
BAV99-7-F
Diodes Incorporated
-
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
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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