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SMC Diode Solutions MBR3045CTP
- Part No.:
- MBR3045CTP
- Manufacturer:
- SMC Diode Solutions
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
MBR3045CTP.pdf
- Description:
- DIODE ARRAY SCHOTTKY 45V TO220AB
- Quantity:
- Payment:
- Shipping:
Inventory:253
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Product details
Overview
MBR3045CTP from Diodes Incorporated is a 30A dual common-cathode Schottky barrier rectifier in ITO-220S package, rated for 45V peak reverse voltage, with 0.58V typical forward voltage at 15A/25°C and 2000V isolation between heatsink tab and cathode. It delivers soft fast switching for high-efficiency DC-DC output rectification in industrial power supplies.
For engineers reviewing the MBR3045CTP datasheet, MBR3045CTP pinout, MBR3045CTP application, or MBR3045CTP equivalent, key selection criteria include per-leg 15A average current rating, 250A non-repetitive surge capability, thermal resistance of 3°C/W junction-to-case, and electrically isolated heatsink tab for simplified thermal design in high-density layouts.
Technical Context
This dual-diode configuration integrates two independent Schottky die sharing a common cathode terminal, enabling synchronous or interleaved output rectification in center-tapped or dual-output topologies. Each leg supports 15A average forward current with 0.58V VF at 15A/25°C and 0.57V at 15A/125°C.
The ITO-220S package features an electrically isolated metal tab (2000V AC isolation), matte tin-plated copper leads, and UL 94V-0 molded plastic housing. Thermal performance relies on direct mounting to a black aluminum heatsink (45mm × 20mm × 12mm) per datasheet note 3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Reverse Voltage | 45 V - Maximum DC blocking capability per leg; defines maximum input/output voltage swing in buck or flyback secondary side |
| Avg. Forward Current (per leg) | 15 A - Continuous conduction limit per diode under 25°C ambient with adequate heatsinking |
| Total Device Current Rating | 30 A - Sum of both legs' ratings; enables dual-rail or parallel-output designs without external current sharing |
| Forward Voltage @ 15A/25°C | 0.58 V - Directly determines conduction loss (0.87W/leg) and thermal load in high-current outputs |
| Junction-to-Case RθJC | 3 °C/W - Enables precise heatsink sizing; 15A operation requires ≤13°C/W total junction-to-ambient path |
| Isolation Voltage (Tab–Cathode) | 2000 VAC - Allows safe mounting to chassis-grounded heatsinks without additional insulation barriers |
| Surge Current IFSM | 250 A - Withstands 8.3ms half-sine transients during power-up or fault events in 48V systems |
Pinout & Package
Package: ITO-220S - Molded plastic case with electrically isolated metal heatsink tab (UL 94V-0), 1.335g mass, matte tin-plated copper leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode A) | Anode of first Schottky diode | Connects to transformer secondary or switch node; carries full leg current |
| 2 (Common Cathode) | Shared cathode node for both diodes | Output return path; must be low-inductance connection to bulk capacitor negative |
| 3 (Anode B) | Anode of second Schottky diode | Independent input path-supports dual-output or interleaved rectification |
| 4 (Heatsink Tab) | Electrically isolated thermal interface | Mounts directly to grounded heatsink; no electrical connection to cathode or anodes |
Key Features
| Feature | Design Value |
|---|---|
| Soft, fast switching | Minimizes reverse recovery ringing and EMI in high-frequency SMPS (>100kHz) without snubbers |
| Low VF Schottky architecture | Reduces conduction losses by ~40% vs. comparable silicon rectifiers at 15A, improving efficiency in 12V/24V/48V outputs |
| Electrically isolated heatsink tab | Eliminates need for insulating pads or shoulder washers when mounting to system chassis ground |
| UL 1557 certification (E94661) | Validates creepage/clearance and flammability compliance for safety-critical industrial and telecom power |
| Matte tin lead finish | Ensures reliable solder wetting per MIL-STD-202 Method 208, supporting automated reflow and wave processes |
Applications
| Server VRM Output Rectification | Industrial 48V DC-DC Converter |
|---|---|
Use Scenario: High-current, low-voltage output stage of multiphase buck converters supplying CPU/GPU cores. IC Role / Device Role / Timing Role: Dual-leg Schottky rectifier replacing MOSFET synchronous switches where gate drive complexity is prohibitive. Use Value: 0.58V VF at 15A reduces conduction loss to 0.87W/leg versus >1.5W for silicon alternatives, easing thermal management in dense server PCBs. | Use Scenario: Secondary-side rectification in isolated 48V-to-12V/5V telecom or factory automation DC-DC modules. IC Role / Device Role / Timing Role: Primary output rectifier handling continuous 30A total load across dual rails or redundant paths. Use Value: 2000V tab-to-cathode isolation allows direct mounting to grounded chassis, reducing BOM count and assembly steps. |
| LED Driver Power Supply | Renewable Energy Inverter Auxiliary Supply |
Use Scenario: Constant-current output stage powering high-brightness LED strings in street lighting or stadium fixtures. IC Role / Device Role / Timing Role: Low-loss freewheeling path during PWM dimming cycles, minimizing heat buildup in enclosed housings. Use Value: Soft switching behavior suppresses high-frequency noise that could interfere with analog current sensing circuits. | Use Scenario: Auxiliary 24V supply derived from main inverter DC bus for control logic and gate drivers in solar/wind inverters. IC Role / Device Role / Timing Role: Input rectifier feeding unregulated 24V buck converter; operates continuously under variable irradiance/load conditions. Use Value: -65°C to +175°C operating range ensures reliability in outdoor enclosures subject to wide ambient swings and thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MBR3045CT | No heatsink tab isolation; cathode connected to tab | Requires insulated mounting hardware; unsuitable for direct-chassis heatsinking | Select only if existing layout uses isolated pad or ceramic washer and space permits added insulation layer |
| VSK3045 | Same 45V/30A rating but TO-247AC package; RθJC = 2.5°C/W | Higher thermal performance but larger footprint; no built-in tab isolation | Prefer for ultra-high-efficiency designs where 0.5°C/W lower thermal resistance justifies board area penalty |
Compared with MBR3045CTP, MBR3045CT lacks tab isolation-requiring extra insulation-and VSK3045 trades compact ITO-220S form factor for marginally better thermal resistance in a larger TO-247AC body, making MBR3045CTP optimal for space-constrained, chassis-mounted industrial power supplies.
Availability
MBR3045CTP is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC-DC converters, and LED driver designs requiring stable component supply despite its discontinued status.
Supply support for MBR3045CTP 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, serving industrial, computing, consumer, and communications markets since 1960.
The MBR3045CTP belongs to Diodes' high-current Schottky rectifier product line, engineered specifically for efficiency-critical secondary-side rectification in high-power density AC-DC and DC-DC converters.
FAQ
Is MBR3045CTP still in production?
No-MBR3045CTP is officially obsolete per Diodes Incorporated's DS31796 Rev. 8-4 (October 2015). It is discontinued with no exact replacement. Aetrix Electronics maintains limited legacy stock and supports controlled end-of-life procurement with full traceability and documentation.
What is the function of Pin 4 (heatsink tab) in MBR3045CTP?
Pin 4 is an electrically isolated metal heatsink tab rated for 2000V AC isolation from the common cathode (Pin 2). It serves solely as a thermal interface-no electrical connection is intended or permitted to any circuit node, enabling direct mounting to grounded metal chassis without insulation hardware.
Can MBR3045CTP replace MBR3045CT in an existing design?
Only with layout revision: MBR3045CTP's isolated tab eliminates the need for insulating hardware required by MBR3045CT (where cathode connects to tab). Swapping without modifying heatsink mounting risks shorting the cathode to chassis ground, causing immediate failure.
What derating applies to MBR3045CTP at 100°C ambient temperature?
Per Figure 5 in DS31796, average forward current derates to ~18A total (9A per leg) at 100°C ambient with RθJA = 13°C/W. This assumes proper mounting to the specified black aluminum heatsink (45mm × 20mm × 12mm); exceeding this requires forced air or larger heatsinking.
MBR3045CTP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- SMC Diode Solutions
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- -
- Voltage - Forward (Vf) (Max) @ If:
- 700 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 45 V
- Operating Temperature - Junction:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220AB
MBR3045CTP FAQ
1.How can I place an order for MBR3045CTP through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR3045CTP 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 MBR3045CTP reliable?
The price and inventory of MBR3045CTP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR3045CTP is usually 5 days.
3.What payment methods are accepted for MBR3045CTP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR3045CTP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR3045CTP?
MBR3045CTP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR3045CTP 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 MBR3045CTP?
For technical support, including MBR3045CTP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR3045CTP requirements.
6.How does Aetrix verify that MBR3045CTP is sourced from the original manufacturer or authorized distributors?
All MBR3045CTP 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 MBR3045CTP meets industry standards.
7.What is the process for return or replacement of MBR3045CTP?
All MBR3045CTP units undergo pre-shipment inspection (PSI). If there is an issue with MBR3045CTP, 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 MBR3045CTP part is unused and in its original packaging.
Return procedure for MBR3045CTP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBR3045CTP Tags
-
BAV99-7-F
Diodes Incorporated
-
BAT54C-7-F
Diodes Incorporated
-
BAV99,215
Nexperia USA Inc.
-
BAT54SLT1G
onsemi
-
BAV70LT1G
onsemi
-
BAT54CLT1G
onsemi
-
BAT54S-7-F
Diodes Incorporated
-
BAV99LT1G
onsemi
-
BAT54S,215
Nexperia USA Inc.
-
BAS40-04LT1G
onsemi
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MMBD1503-TP
Micro Commercial Co
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BAV99WT1G
onsemi
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