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Diodes Incorporated SBR4040CT
- Part No.:
- SBR4040CT
- Manufacturer:
- Diodes Incorporated
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
SBR4040CT.pdf
- Description:
- DIODE ARRAY SBR 40V 20A TO-220-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,016
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Product details
Overview
SBR4040CT from Diodes Incorporated is a 40A dual common-cathode Super Barrier Rectifier rated for 40V peak reverse voltage, featuring low forward voltage (0.44V typ. @ 20A, 25°C), soft fast switching, and TO-220AB package with isolated heatsink mounting capability. It serves as a high-efficiency output rectifier in DC-DC converters and AC-DC front-ends for industrial power supplies.
For engineers reviewing the SBR4040CT datasheet, SBR4040CT pinout, SBR4040CT application, or SBR4040CT equivalent, key selection criteria include forward voltage at high junction temperature, surge current handling (280A IFSM), thermal resistance (2°C/W RθJC), and RoHS/Green compliance status.
Technical Context
This dual-diode rectifier integrates two independent SBR (Super Barrier Rectifier) die in a single TO-220AB thermally optimized package with electrically isolated tab. Each leg supports 20A average forward current and withstands 40V repetitive reverse voltage, enabling synchronous-like efficiency without gate drive complexity.
Its patented super barrier structure delivers lower VF than Schottky diodes at comparable ratings while maintaining superior high-temperature leakage stability (100mA max IR @ 125°C, 40V), and exhibits soft recovery behavior critical for EMI-sensitive switch-mode topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 40 V - Maximum non-repetitive reverse voltage per leg; defines safe blocking range in buck, flyback, or OR-ing applications. |
| IO (per leg) | 20 A - Continuous DC forward current rating per diode; total device rating is 40A with shared cathode configuration. |
| VF @ 20A, 25°C | 0.44 V typ. - Low conduction loss enables >95% efficiency in 12V-output DC-DC converters at full load. |
| RθJC | 2 °C/W - Junction-to-case thermal resistance; allows direct heatsink mounting for sustained 20A/leg operation up to 150°C TJ. |
| IFSM | 280 A - Non-repetitive 8.3ms surge rating; withstands inrush and short-circuit transients in server PSU and motor drive outputs. |
| IR @ 40V, 125°C | 100 mA max - Controlled high-temp leakage ensures stable biasing in hot-plug and redundant power systems. |
Pinout & Package
TO-220AB package with electrically isolated metal tab (pin 3), standard 3-pin configuration: Pin 1 = Anode 1, Pin 2 = Anode 2, Pin 3 = Cathode (common, tab-connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Diode Leg 1 | Input terminal for first rectification path; connects to transformer secondary or switching node. |
| Pin 2 | Anode of Diode Leg 2 | Input terminal for second rectification path; enables dual-output or interleaved designs. |
| Pin 3 (Tab) | Common Cathode | Output node tied to system ground or output capacitor negative; electrically isolated for heatsink mounting. |
Key Features
| Feature | Design Value |
|---|---|
| Patented Super Barrier Technology | Combines Schottky-like low VF with PN-junction thermal stability-no catastrophic thermal runaway at 125°C. |
| Soft, Fast Switching | Low reverse recovery charge (Qrr not specified but implied by soft recovery curve) reduces EMI and snubber losses in 100–500kHz SMPS. |
| Lead-Free & Halogen-Free | Meets RoHS 2 (2011/65/EU) and Diodes Inc.'s "Green" standard (<900ppm Br+Cl, <1000ppm Sb); suitable for automotive and industrial environmental compliance. |
| Isolated Heatsink Mounting | TO-220AB tab isolation (2000VAC, 3s) permits direct bolt-down to grounded chassis without insulating hardware. |
Applications
| Server Power Supply Output Rectification | Industrial DC-DC Converter Secondary Side |
|---|---|
Use Scenario: High-density 12V/48V output stage in 1U server PSUs operating continuously at 60–75°C ambient. IC Role / Device Role / Timing Role: Dual-leg synchronous rectifier replacement-handles 20A per phase with shared cathode return to bulk capacitor. Use Value: 0.44V VF at 20A cuts conduction loss by ~35% vs. standard FRD, reducing heatsink size by 40%. | Use Scenario: Isolated 24V-to-5V/3.3V DC-DC module for PLC I/O modules requiring long-term reliability at 85°C. IC Role / Device Role / Timing Role: Output rectifier in forward converter secondary; leverages soft recovery to minimize RFI in noise-sensitive analog signal chains. Use Value: Stable 100mA IR max at 125°C prevents output droop during thermal stress testing per IEC 61000-6-4. |
| Telecom Rectifier Module | Redundant Power OR-ing Circuit |
Use Scenario: -48V DC input rectification in telecom shelf power systems with forced-air cooling. IC Role / Device Role / Timing Role: Input protection rectifier before bulk capacitor; blocks reverse current during hot-swap events. Use Value: 280A IFSM withstands 10ms surges from battery backup switchover transients without degradation. | Use Scenario: Dual 28V power inputs in avionics box with automatic source selection and fault isolation. IC Role / Device Role / Timing Role: Common-cathode OR-ing diode pair; isolates failed supply while minimizing forward drop across both paths. Use Value: Matched VF between legs (<±5mV typical) ensures balanced current sharing within 3% tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-current, low-VF rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| VB4040C-E3/45 (Vishay) | Same 40V/40A rating, but uses trench Schottky architecture; VF = 0.52V @ 20A, 25°C (higher than SBR4040CT's 0.44V). | Limited high-temp leakage control-IR = 250mA @ 125°C, 40V-less suitable for sealed enclosures above 70°C. | Prefer when cost sensitivity outweighs thermal performance; avoid in unventilated industrial environments. |
| MBR4040CT (ON Semiconductor) | Standard Schottky rectifier; VF = 0.55V @ 20A, 25°C; no soft recovery-higher EMI generation in high-frequency converters. | No isolation rating on tab; requires insulating pad for grounded heatsinks, increasing thermal impedance by ~1.2°C/W. | Select only for legacy designs where EMI filtering budget exists and thermal margin exceeds 20°C. |
Compared with VB4040C-E3/45 and MBR4040CT, the SBR4040CT delivers the lowest VF at elevated temperature and certified isolation-making it optimal for space-constrained, thermally aggressive, and safety-critical power stages where efficiency and reliability are co-prioritized.
Availability
SBR4040CT is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, telecom rectifier modules, and redundant OR-ing circuits requiring stable component supply across multi-year production cycles.
Supply support for SBR4040CT 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.
The SBR® product line was developed specifically for high-efficiency, high-reliability power conversion-targeting applications where Schottky limitations (leakage, thermal instability) and FRD drawbacks (slow recovery, high VF) must be simultaneously overcome.
FAQ
What is the maximum junction temperature and how is it enforced?
The SBR4040CT has an absolute maximum junction temperature of +150°C, verified per JEDEC JESD22-A108. Operation at this limit requires thermal design ensuring RθJA ≤ 5.5°C/W with a 25°C ambient and 20A/leg load. Derating curves in Figure 4 confirm 20A is sustainable up to 75°C ambient with standard heatsinking.
Does the TO-220AB package provide electrical isolation between the tab and pins?
Yes-the TO-220AB variant of SBR4040CT features a fully isolated metal tab rated for 2000VAC isolation (3 seconds) from all leads, as confirmed in the Thermal Characteristics table. This allows direct mounting to grounded heatsinks without insulating hardware, unlike standard TO-220 devices.
How does the SBR technology differ from conventional Schottky rectifiers?
SBR uses a proprietary epitaxial structure that replaces the metal-semiconductor junction with a low-barrier semiconductor heterojunction. This yields Schottky-level forward voltage (0.44V) but with PN-junction-like leakage stability-IR remains ≤100mA at 125°C, versus >500mA for comparably rated Schottkys.
Can SBR4040CT replace MBR4040CT in existing PCB layouts?
Yes-SBR4040CT shares identical TO-220AB footprint, pinout, and mechanical dimensions with MBR4040CT. No layout change is required; however, thermal performance improves due to lower RθJC (2°C/W vs. ~3.5°C/W), allowing higher sustained current or reduced heatsink mass.
SBR4040CT 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):
- 40 V
- Current - Average Rectified (Io) (per Diode):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 530 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 500 µA @ 40 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-3
SBR4040CT FAQ
1.How can I place an order for SBR4040CT through Aetrix?
Please submit a Request for Quotation (RFQ) for SBR4040CT 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 SBR4040CT reliable?
The price and inventory of SBR4040CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SBR4040CT is usually 5 days.
3.What payment methods are accepted for SBR4040CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SBR4040CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SBR4040CT?
SBR4040CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SBR4040CT 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 SBR4040CT?
For technical support, including SBR4040CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SBR4040CT requirements.
6.How does Aetrix verify that SBR4040CT is sourced from the original manufacturer or authorized distributors?
All SBR4040CT 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 SBR4040CT meets industry standards.
7.What is the process for return or replacement of SBR4040CT?
All SBR4040CT units undergo pre-shipment inspection (PSI). If there is an issue with SBR4040CT, 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 SBR4040CT part is unused and in its original packaging.
Return procedure for SBR4040CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SBR4040CT 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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