MBR3045PT Schottky Diode Array 1 Pair of Common Cathode 45V 30A TO-3P-3
The MBR3045PT is a Schottky barrier rectifier array containing two diodes in a common‑cathode configuration, packaged in a TO‑247 (also known as TO‑3P) through‑hole package. Each leg can conduct up to 15A continuous (30A total), with a peak reverse voltage of 45V. The common‑cathode topology allows full‑wave rectification using a single transformer winding and simplifies board layout for OR‑ing and polarity protection circuits. Schottky technology provides a low forward voltage drop (0.60V typical at 20A, 125°C) and virtually no reverse recovery time, making it ideal for high‑frequency switching applications where efficiency is paramount.
The device features a guard ring for over‑voltage protection, enhancing ruggedness against transient spikes. Its metal‑silicon junction ensures majority carrier conduction, eliminating minority carrier storage effects. With a non‑repetitive surge current rating of 200A (8.3ms single half‑sine wave), it can survive severe startup or fault conditions. The TO‑247 package offers low thermal resistance (1.4°C/W junction‑to‑case) and is designed for easy heatsink mounting, enabling reliable operation up to 150°C junction temperature. Typical applications include output rectification in SMPS, freewheeling diodes in motor drives, and reverse battery protection in automotive and industrial systems.
Features:
- Dual Schottky rectifier with common cathode in a single package.
- Extremely low forward voltage drop for high efficiency.
- Fast switching with no reverse recovery time.
- High surge current capability for reliable transient handling.
- Guard ring for over‑voltage protection.
- Isolated package (mounting tab electrically isolated from internal circuitry).
- Low power dissipation and high thermal conductivity.
- Lead‑free and RoHS compliant.
- High current capacity with low leakage.
Specifications:
| Parameter | Symbol | MBR3045PT Value | Unit | Test Condition |
|---|---|---|---|---|
| Peak Repetitive Reverse Voltage | VRRM | 45 | V | – |
| Average Rectified Forward Current (Total) | IF(AV) | 30 | A | TC = 100°C, each leg 15A |
| Non‑Repetitive Peak Surge Current | IFSM | 200 | A | 8.3ms single half‑sine wave |
| Forward Voltage per Leg | VF | 0.76 (max) | V | IF = 20A, TC = 25°C |
| Forward Voltage per Leg | VF | 0.72 (max) | V | IF = 30A, TC = 25°C |
| Forward Voltage per Leg | VF | 0.60 (max) | V | IF = 20A, TC = 125°C |
| Reverse Current per Leg at Rated VRRM | IR | 0.15 (max) | mA | TA = 25°C |
| Reverse Current per Leg at Rated VRRM | IR | 60 (max) | mA | TA = 125°C |
| Peak Repetitive Reverse Surge Current per Leg | IRRM | 1.0 | A | 2.0µs pulse, f=1.0kHz |
| Total Capacitance per Leg | CT | Typical 400 | pF | VR = 5V, f = 1MHz |
| Operating Junction Temperature | TJ | -65 to +150 | °C | – |
| Thermal Resistance, Junction to Case | RθJC | 1.4 | °C/W | – |
| Power Dissipation | PD | 3.0 | W | – |
Pinout:
| Pin | Name | Description |
|---|---|---|
| 1 | Anode 1 | Anode of first Schottky diode |
| 2 | Common Cathode (Tab) | Cathode for both diodes – typically center pin (pin 2) is common cathode; mounting tab is electrically connected to pin 2 |
| 3 | Anode 2 | Anode of second Schottky diode |
Applications:
- Output rectification in switch‑mode power supplies (SMPS).
- Freewheeling diode in buck converters and motor drivers.
- Polarity protection / reverse battery protection.
- OR‑ing diodes in redundant power systems.
- Battery chargers for lead‑acid and Li‑ion (up to 45V).
- Low‑voltage, high‑frequency inverters.
- Solar panel bypass diodes.
- Uninterruptible power supplies (UPS).
- DC‑DC converters (buck, boost, forward, flyback).
Package Included:
- 1x MBR3045PT Schottky Diode Array 1 Pair of Common Cathode 45V 30A TO-3P-3.
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