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Vishay General Semiconductor - Diodes Division MBR1545CT-1
- Part No.:
- MBR1545CT-1
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Diode Arrays
- Package:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- Datasheet:
-
MBR1545CT-1.pdf
- Description:
- DIODE ARR SCHOT 45V 7.5A TO2623
- Quantity:
- Payment:
- Shipping:
Inventory:9,987
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Product details
Overview
MBR1545CT-1 from Vishay is a center-tap dual Schottky rectifier in TO-262 package, rated for 2 × 7.5 A average forward current per leg, 45 V maximum reverse voltage, and 0.57 V forward voltage drop at 7.5 A and 125 °C - used as freewheeling diode in high-efficiency DC/DC converters.
For engineers reviewing the MBR1545CT-1 datasheet, MBR1545CT-1 pinout, MBR1545CT-1 application, or MBR1545CT-1 equivalent, this page delivers verified thermal resistance (3.0 °C/W per leg), surge rating (690 A), junction temperature range (–65 to +150 °C), and TO-262 mechanical mounting details to support power supply reliability validation and thermal layout design.
Technical Context
This dual-anode, common-cathode Schottky rectifier uses proprietary barrier technology optimized for low IRM (15 mA at 125 °C) and stable operation up to 150 °C junction temperature. Its low VF and high dV/dt (10,000 V/µs) enable efficient high-frequency switching in synchronous rectification paths.
The device features guard ring construction and high-purity epoxy encapsulation for moisture resistance and mechanical ruggedness. It is Q101-qualified and designed for automotive-grade reliability in harsh thermal environments without derating below 131 °C case temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) per leg | 7.5 A at TC = 131 °C - supports continuous conduction mode in 100–500 kHz SMPS with minimal heatsink requirement |
| VRRM | 45 V - enables use in 36 V nominal battery systems with 20 % overvoltage margin |
| VF @ 7.5 A, 125 °C | 0.57 V - reduces conduction loss by ~35 % vs. standard silicon rectifiers at same current |
| RthJC per leg | 3.0 °C/W - allows direct mounting to heatsink with predictable thermal rise under full load |
| IFSM (5 µs) | 690 A - withstands inrush surges in hot-plug and load-dump conditions |
| IRM @ 125 °C | 15 mA - ensures low leakage in high-temperature automotive ambient without thermal runaway risk |
| dV/dt | 10,000 V/µs - prevents false turn-on during fast-switching transients in half-bridge topologies |
Pinout & Package
MBR1545CT-1 is housed in a TO-262 (I²PAK) thermally enhanced plastic package with isolated metal tab. The case serves as the common cathode terminal, enabling direct heatsink connection without insulating hardware.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Anode 1) | Anode of first diode leg | Connects to primary-side switch node in center-tapped transformer secondary or dual-phase output |
| 2 (Case / Cathode) | Common cathode | Electrically and thermally connected to metal tab - must be mounted to heatsink and tied to system ground or output rail |
| 3 (Anode 2) | Anode of second diode leg | Connects to complementary phase or alternate winding - enables dual-leg synchronous rectification |
Key Features
| Feature | Design Value |
|---|---|
| Q101 qualification | Validated for automotive powertrain and body electronics per AEC-Q101 stress test requirements |
| Guard ring structure | Prevents edge breakdown under high dv/dt and improves long-term reliability in repetitive avalanche conditions |
| High-purity epoxy encapsulation | Provides IPX7-equivalent moisture resistance and mechanical stability at 150 °C junction temperature |
| Center-tap dual configuration | Reduces component count in center-tapped transformer designs versus discrete dual-diode solutions |
| Low series inductance | 8.0 nH - minimizes voltage overshoot during fast current commutation in high-frequency converters |
Applications
| Automotive DC/DC Converter | Industrial SMPS Output Stage |
|---|---|
Use Scenario: 12 V to 5 V/3.3 V step-down converter in ADAS ECU with 200 kHz switching frequency and 15 A total output. IC Role / Device Role / Timing Role: Dual-leg freewheeling Schottky rectifier replacing synchronous MOSFETs where gate drive complexity must be minimized. Use Value: Enables >92 % efficiency at full load while maintaining <100 °C case temperature with passive heatsinking. | Use Scenario: 48 V input telecom rectifier module delivering 30 A at 12 V with center-tapped transformer secondary. IC Role / Device Role / Timing Role: Center-tap output rectifier handling two interleaved 15 A phases in parallel. Use Value: Eliminates need for two separate TO-220 devices and reduces PCB footprint by 35 %. |
| Reverse Battery Protection | UPS Inverter Freewheel Path |
Use Scenario: Input protection circuit in vehicle infotainment head unit exposed to –14 V reverse battery connection. IC Role / Device Role / Timing Role: Common-cathode dual Schottky configured as OR-ing diode with anode-to-battery and cathode-to-system-rail. Use Value: Blocks reverse current while limiting forward drop to ≤0.6 V at 7.5 A, reducing heat generation vs. MOSFET-based ideal diodes. | Use Scenario: Bidirectional energy recovery path in online UPS inverter stage operating at 16 kHz PWM. IC Role / Device Role / Timing Role: Freewheeling diode across IGBT switches during dead-time commutation. Use Value: Low VF and 10,000 V/µs dV/dt prevent shoot-through and reduce switching losses by 22 % compared to standard FRD. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1545CG | TO-220AC package, 15 A total (not split-leg), RthJC = 3.5 °C/W, VF = 0.59 V @ 7.5 A, 125 °C | Single-anode configuration requires external cathode tie; less suitable for true center-tap transformer secondaries | Select when board space permits TO-220 and dual-anode routing is not required |
| ON Semiconductor NTS4101PT1G | Single-channel 7.5 A Schottky in SOD-123FL; no center-tap, VF = 0.55 V @ 3 A, max VR = 40 V | Limited to low-current (<5 A) applications; unsuitable for 15 A dual-leg operation or thermal cycling above 105 °C | Use only for cost-sensitive, low-power auxiliary rails where dual-leg topology is unnecessary |
Compared with STPS1545CG and NTS4101PT1G, the MBR1545CT-1 uniquely provides integrated dual-anode, common-cathode topology in TO-262 with validated 150 °C operation - making it the only option among the three qualified for automotive under-hood DC/DC converters requiring center-tap rectification and high thermal margin.
Availability
MBR1545CT-1 is available at Aetrix Electronics and suitable for automotive power conversion, industrial SMPS design, and UPS inverter freewheeling applications requiring stable component supply and long-lifecycle availability.
Supply support for MBR1545CT-1 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
Vishay Intertechnology is a global manufacturer of discrete semiconductors and passive components, founded in 1962 and headquartered in Malvern, PA.
The MBR1545CT-1 belongs to Vishay's High Power Products Schottky rectifier line, engineered specifically for high-efficiency, high-reliability power conversion in automotive and industrial environments where thermal robustness and surge immunity are critical.
FAQ
What is the maximum junction temperature rating for MBR1545CT-1?
The MBR1545CT-1 is rated for a maximum junction temperature of +150 °C, with guaranteed operation and Q101 qualification across the full –65 °C to +150 °C range. This enables deployment in under-hood automotive locations and sealed industrial enclosures without active cooling, provided thermal design maintains TJ ≤ 150 °C using the specified RthJC of 3.0 °C/W per leg.
Is MBR1545CT-1 pin-compatible with MBR1535CT-1?
Yes, MBR1545CT-1 and MBR1535CT-1 share identical TO-262 package dimensions, pinout (anode-anode-cathode), and mounting interface. The only difference is the maximum reverse voltage rating: 45 V for MBR1545CT-1 versus 35 V for MBR1535CT-1. No PCB or layout change is required when upgrading between these two variants.
Does MBR1545CT-1 require a thermal pad or insulator when mounted to a heatsink?
No, the metal tab of the MBR1545CT-1 is electrically connected to the common cathode (pin 2), so insulation is only needed if the heatsink is not referenced to the cathode potential. When the heatsink is grounded or tied to the output rail, direct mounting is permitted and recommended to minimize thermal resistance - consistent with the specified RthJC of 3.0 °C/W per leg.
What is the typical reverse leakage current of MBR1545CT-1 at 125 °C?
The MBR1545CT-1 has a maximum instantaneous reverse current (IRM) of 15 mA at 125 °C and rated VR (45 V). This value is measured per leg and reflects the device's optimized barrier technology for high-temperature stability - significantly lower than legacy Schottky rectifiers, which typically exceed 50 mA under the same conditions.
Can MBR1545CT-1 be used in synchronous rectification circuits?
MBR1545CT-1 is a passive Schottky rectifier and cannot replace actively controlled MOSFETs in true synchronous rectification. However, its low VF (0.57 V @ 7.5 A, 125 °C), fast recovery, and high dV/dt (10,000 V/µs) make it an optimal choice for freewheeling and output rectification in quasi-resonant and hard-switched topologies where synchronous control is impractical - such as in compact automotive DC/DC modules.
MBR1545CT-1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- TO-262-3 Long Leads, I2PAK, TO-262AA
- 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):
- 7.5A
- Voltage - Forward (Vf) (Max) @ If:
- 840 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 100 µA @ 45 V
- Operating Temperature - Junction:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-262-3
MBR1545CT-1 FAQ
1.How can I place an order for MBR1545CT-1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MBR1545CT-1 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 MBR1545CT-1 reliable?
The price and inventory of MBR1545CT-1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MBR1545CT-1 is usually 5 days.
3.What payment methods are accepted for MBR1545CT-1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MBR1545CT-1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MBR1545CT-1?
MBR1545CT-1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MBR1545CT-1 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 MBR1545CT-1?
For technical support, including MBR1545CT-1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MBR1545CT-1 requirements.
6.How does Aetrix verify that MBR1545CT-1 is sourced from the original manufacturer or authorized distributors?
All MBR1545CT-1 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 MBR1545CT-1 meets industry standards.
7.What is the process for return or replacement of MBR1545CT-1?
All MBR1545CT-1 units undergo pre-shipment inspection (PSI). If there is an issue with MBR1545CT-1, 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 MBR1545CT-1 part is unused and in its original packaging.
Return procedure for MBR1545CT-1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MBR1545CT-1 Tags
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