MBR4045CT Schottky Rectifier Diode 45V 40A TO-220AB
MBR4045CT Commonly used as output rectifier in switching power supplies, DC‑DC converters, and freewheeling diode for inductive loads.
45.00 EGP
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The MBR4045CT is a 45V, 40A Schottky barrier rectifier housed in a TO‑220AB package with a common cathode dual‑diode configuration. It features extremely low forward voltage drop and fast majority‑carrier conduction, which minimizes power losses and enhances system efficiency. The device is designed for high current applications and includes a guard ring for transient over‑voltage protection, improving reliability in harsh environments.
This rectifier can handle a peak forward surge current of up to 380A, making it suitable for applications with inrush current stresses. Its operating junction temperature ranges from -55°C to +150°C, and the lead‑free, RoHS‑compliant construction ensures compatibility with modern environmental standards. Typical applications include output rectification in high‑frequency power supplies, reverse polarity protection, and freewheeling diodes in motor drives.
Features:
- Low forward voltage drop.
- High current capability.
- High forward surge capability.
- Low power losses, high efficiency.
- Guard ring for over‑voltage protection.
- Lead‑free, RoHS compliant.
Specifications:
| Parameter | Conditions | Value | Unit |
|---|---|---|---|
| Maximum repetitive peak reverse voltage | – | 45 | V |
| Maximum RMS voltage | – | 45 | V |
| Maximum DC blocking voltage | – | 45 | V |
| Maximum average forward rectified current (per leg) | TC=125°C | 20 | A |
| Maximum average forward rectified current (total) | TC=125°C | 40 | A |
| Peak forward surge current | 8.3ms half sine | 380 | A |
| Forward voltage drop | IF=10A, TA=25°C | 0.51 | V |
| Forward voltage drop (maximum) | IF=10A, TA=25°C | 0.65 | V |
| Maximum reverse current | VR=45V, TA=25°C | 20 | µA |
| Maximum reverse current (maximum) | VR=45V, TA=25°C | 100 | µA |
| Operating junction temperature range | – | -55 to +150 | °C |
| Storage temperature range | – | -55 to +150 | °C |
| Thermal resistance (junction to case, per leg) | – | 2.0 | °C/W |

Pinout:
| Pin Number | Description |
|---|---|
| 1 | Anode 1 |
| 2 | Cathode (Common) |
| 3 | Anode 2 |
Applications:
- Output rectification in switching power supplies.
- DC‑DC converters.
- Freewheeling diodes for inductive loads (motors, relays).
- Reverse polarity protection circuits.
- Low‑voltage, high‑frequency inverters.
- Battery charging circuits.
Packages included:
- 1X MBR4045CT Schottky Rectifier Diode 45V 40A TO-220AB.
Documents:
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