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Diodes Incorporated SBR40U300CT
- Part No.:
- SBR40U300CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SBR40U300CT.pdf
- Description:
- DIODE ARRAY SBR 300V 20A TO220-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,112
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Product details
Overview
SBR40U300CT from Diodes Incorporated is a 300V, 40A dual common-cathode super barrier rectifier in TO220AB package, featuring ultra-low forward voltage (0.73V @ 20A, 125°C), soft fast switching (tRR = 26–35 ns), and +175°C junction temperature rating. It replaces conventional Schottky and fast recovery diodes in high-efficiency AC/DC front-end and DC/DC secondary-side rectification.
For engineers reviewing the SBR40U300CT datasheet, SBR40U300CT pinout, SBR40U300CT application, or SBR40U300CT equivalent, key selection criteria include forward voltage at elevated temperature, reverse recovery behavior under di/dt stress, thermal resistance (RθJA = 52°C/W), and TO220AB mechanical compatibility with standard heatsinks.
Technical Context
This dual-leg common-cathode rectifier integrates two independent SBR® die in a single TO220AB thermally optimized package. Each leg supports 300V VRRM, 20A average current, and withstands 235A non-repetitive surge (8.3ms half-sine).
Its patented super barrier structure delivers lower VF than standard Schottkys while maintaining low leakage (<10 µA @ 300V, 125°C) and superior high-temperature stability-enabling operation up to +175°C without derating beyond ambient limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 300 V - Maximum repetitive reverse blocking voltage per leg; defines usable input voltage range in PFC and offline SMPS. |
| IO (per leg) | 20 A - Continuous DC output current per anode leg at TA = 25°C; total device rating is 40A with shared cathode. |
| VF | 0.73 V @ 20A, 125°C - Confirmed low conduction loss at operating temperature; reduces thermal load vs. Si FRD alternatives. |
| tRR | 26–35 ns - Measured reverse recovery time under di/dt = 100 A/µs; enables high-frequency operation with minimal switching loss. |
| RθJA | 52 °C/W - Junction-to-ambient thermal resistance per leg; determines heatsink sizing for 20A continuous operation. |
| TJ max | +175 °C - Maximum allowable junction temperature; supports compact designs in high-ambient industrial environments. |
Pinout & Package
TO220AB package: 3-terminal, isolated tab (anode1/anode2/cathode), matte tin-plated copper lead frame, UL 94V-0 molded plastic case, 1.85 g weight. Tab is electrically connected to cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Left) | Anode 1 | Input terminal for first rectifying leg; connects to AC or transformer secondary winding. |
| Pin 2 (Center) | Cathode (Common) | Shared output node for both legs; electrically tied to metal tab; requires isolation if mounted to heatsink. |
| Pin 3 (Right) | Anode 2 | Input terminal for second rectifying leg; enables dual-phase or center-tapped transformer configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | 0.73 V @ 20A, 125°C - Reduces conduction loss by ≥15% vs. comparable 300V Schottky diodes at operating temperature. |
| Soft fast switching | tRR = 26–35 ns with low IRR/di/dt sensitivity - Minimizes EMI and voltage overshoot in synchronous rectifier layouts. |
| +175°C junction rating | Rated operation up to TJ = +175°C - Enables use in sealed enclosures or high-ambient industrial power supplies without forced air. |
| Green RoHS-compliant package | Halogen- and antimony-free TO220AB with <900 ppm Br/Cl, <1000 ppm Sb - Meets IPC-1752A Tier 1 environmental compliance requirements. |
Applications
| Server PSU Secondary Rectification | Industrial AC/DC Front-End |
|---|---|
Use Scenario: 12V/24V/48V output stage in 80 PLUS Titanium server PSUs using LLC resonant topology. IC Role / Device Role / Timing Role: Dual-leg common-cathode secondary-side rectifier replacing discrete Schottky pairs. Use Value: 0.73V VF at 125°C lowers conduction loss by ~0.5W per leg vs. legacy 300V Schottky, improving full-load efficiency by 0.3–0.4%. | Use Scenario: Input rectification in 3kW industrial motor drive power supplies with active PFC stage. IC Role / Device Role / Timing Role: High-current bridge replacement in split-rail DC bus generation. Use Value: 235A IFSM rating supports high inrush tolerance; 52°C/W RθJA allows direct mounting to aluminum heatsink without thermal interface pads. |
| Telecom DC/DC Converters | Renewable Energy Inverters |
Use Scenario: Isolated 48V–12V intermediate bus converter in 5G base station power modules. IC Role / Device Role / Timing Role: Synchronous rectifier driver companion diode for low-side FET body diode clamping. Use Value: Soft recovery (tRR ≤35 ns) prevents shoot-through during gate drive transitions, reducing MOSFET stress and EMI filtering cost. | Use Scenario: DC link rectification in string-level solar microinverters with bidirectional capability. IC Role / Device Role / Timing Role: Bidirectional freewheeling path in H-bridge inverter stages during reactive power control. Use Value: Stable leakage (<10 µA @ 300V, 125°C) ensures low standby loss; +175°C rating supports unventilated outdoor enclosure mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current super barrier rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-40CPH03-M3 | 300V, 40A dual common-cathode; VF = 0.79V @ 20A, 125°C; tRR = 45 ns. | Higher VF and slower recovery increase conduction and switching loss in >300 kHz designs. | Prefer when legacy layout uses same footprint and thermal design tolerates +0.06V VF penalty. |
| ON Semiconductor MUR460G | 600V, 4A single fast recovery diode; VF = 1.8V @ 4A; no dual-leg configuration. | Not functionally equivalent: lower current, higher voltage, single-diode topology requires parallel devices. | Only suitable for low-power, high-VR applications where dual-leg integration is unnecessary. |
Compared with VS-40CPH03-M3 and MUR460G, SBR40U300CT delivers the lowest system-level loss in high-current, high-frequency rectification due to its combination of 0.73V VF at 125°C and sub-35 ns soft recovery-making it optimal for space-constrained, thermally demanding telecom and server power designs.
Availability
SBR40U300CT is available at Aetrix Electronics and suitable for server power supplies, industrial motor drives, telecom DC/DC converters, and renewable energy inverters requiring stable component supply across multi-year production cycles.
Supply support for SBR40U300CT 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, manufacturing, and sales operations across Asia, Europe, and North America.
SBR40U300CT belongs to Diodes' Super Barrier Rectifier (SBR®) product line, engineered specifically to replace Schottky and fast recovery diodes in high-efficiency, high-temperature power conversion systems where low VF and soft switching are critical.
FAQ
Is the metal tab of SBR40U300CT electrically connected to a specific pin?
Yes-the TO220AB metal tab is internally connected to Pin 2 (common cathode). When mounted to a heatsink, electrical isolation (e.g., mica washer or insulating pad) is required unless the heatsink is referenced to the cathode potential. This configuration enables direct thermal coupling while preserving circuit node integrity.
What is the maximum recommended PCB copper area for thermal relief at 20A continuous per leg?
For 20A per leg at TA = 70°C, a minimum 400 mm² (20 mm × 20 mm) 2-oz copper pour connected to Pin 2 and the tab is recommended. Thermal vias (≥8×0.3mm diameter) to inner ground planes further reduce RθJA by ~8°C/W, enabling higher ambient operation without external heatsink.
How does SBR40U300CT perform under capacitive load conditions?
The datasheet specifies a 20% current derating for capacitive loads. At 20A rated per leg, this means limiting continuous current to 16A when feeding bulk capacitance directly-due to higher peak surge stress during cold-start charging. Use inrush limiters or soft-start circuits is advised for >1000 µF input banks.
Can SBR40U300CT be used in place of a standard TO220 Schottky like SB560?
No-SB560 is a 60V, 5A single Schottky diode in TO220AC. SBR40U300CT is a 300V, 40A dual-leg device in TO220AB with different pinout, voltage rating, and thermal profile. Direct substitution is mechanically and electrically incompatible; redesign of layout, thermal management, and circuit topology is required.
SBR40U300CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- SBR®
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Super Barrier
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 890 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 100 µA @ 300 V
- Operating Temperature - Junction:
- -65°C ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SBR40U300CT FAQ
1.How can I place an order for SBR40U300CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR40U300CT 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 SBR40U300CT reliable?
The price and inventory of SBR40U300CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR40U300CT is usually 5 days.
3.What payment methods are accepted for SBR40U300CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR40U300CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR40U300CT?
SBR40U300CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR40U300CT 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 SBR40U300CT?
For technical support, including SBR40U300CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR40U300CT requirements.
6.How does Aetrix verify that SBR40U300CT is sourced from the original manufacturer or authorized distributors?
All SBR40U300CT 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 SBR40U300CT meets industry standards.
7.What is the process for return or replacement of SBR40U300CT?
All SBR40U300CT units undergo pre-shipment inspection (PSI). If there is an issue with SBR40U300CT, 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 SBR40U300CT part is unused and in its original packaging.
Return procedure for SBR40U300CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBR40U300CT 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
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BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
-
BAV99WT1G
onsemi
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