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MBR20150CT Schottky Rectifier Diode — TO-220, 20A 150V Dual, Fast Recovery (5-Pack)
MBR20150CT Schottky Rectifier Diode TO-220, 20A 150V Dual, Fast Recovery (5-Pack)
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MBR20150CT Schottky Rectifier Diode — TO-220, 20A, 150V, Dual Common-Cathode (5-Pack)
The MBR20150CT is a dual Schottky rectifier diode in a TO-220 package with a common-cathode configuration (two anodes, one shared cathode tab). Rated at 150V reverse voltage and 20A average forward current per diode (10A per element), it provides low forward voltage drop (~0.75V at 10A) and fast switching for high-efficiency rectification in switching power supplies, solar charge controllers, synchronous rectifiers, and freewheeling diode applications.
Key Specifications
| Parameter | Value |
|---|---|
| Package | TO-220 (through-hole, 3-pin) |
| Configuration | Dual common-cathode (2 diodes, shared cathode tab) |
| Reverse Voltage (VR) | 150V |
| Average Forward Current (IF) | 20A total (10A per element) |
| Forward Voltage (VF) | 0.75V typ. (IF=10A, TC=25°C) |
| Reverse Recovery Time | <10ns (Schottky, majority carrier) |
| Operating Temperature | -65°C to +150°C |
| Quantity | 5 pieces |
MBR20150CT Internal Configuration
| Pin | Connection |
|---|---|
| Pin 1 (left) | Anode of D1 |
| Pin 2 (center / tab) | Common Cathode (both diodes) |
| Pin 3 (right) | Anode of D2 |
MBR20150CT vs Common Schottky Alternatives
| Part | VR | IF | VF (typ) | Best For |
|---|---|---|---|---|
| MBR20150CT | 150V | 20A | 0.75V | SMPS output rectifier, solar charger |
| MBR3045CT | 45V | 30A | 0.50V | Low-voltage high-current rectification |
| SB5100 | 100V | 5A | 0.70V | Single diode, lower current |
| 1N5822 | 40V | 3A | 0.525V | Low-voltage freewheeling, buck converter |
Why Choose MBR20150CT?
- 150V reverse voltage — suitable for 48V–72V DC bus rectification with adequate margin
- 0.75V forward voltage — significantly lower than standard PN diodes (1.0–1.1V), reducing rectification losses
- Dual common-cathode — ideal for center-tap full-wave rectifier or two-phase rectification in one package
- <10ns recovery — Schottky majority-carrier switching, no reverse recovery loss
- TO-220 with heatsink tab — cathode tab mounts to heatsink for high-power operation
Compatible With / Common Use Cases
- SMPS output rectifier: Full-wave center-tap rectifier on secondary winding of flyback or forward converter (12V–48V output)
- Solar charge controller: Anti-backflow diode from solar panel to battery (12V–48V systems)
- Buck converter freewheeling: Freewheeling diode in synchronous or asynchronous buck converter
- Battery charger: Output rectifier in 24V–48V battery charger SMPS
- Reverse polarity protection: Series protection diode for 12V–48V DC input circuits
Frequently Asked Questions
Q: How do I use MBR20150CT as a full-wave center-tap rectifier?
A: Connect the center tap of the transformer secondary to the cathode (tab, pin 2). Connect each end of the secondary winding to pin 1 and pin 3 (the two anodes). The output DC+ is taken from the cathode (tab). Add a filter capacitor from DC+ to GND. This gives full-wave rectification using both diodes alternately on each half-cycle.
Q: Does the cathode tab need to be electrically isolated from the heatsink?
A: The cathode tab is electrically connected to the cathode (DC+ output). If multiple MBR20150CT are mounted on the same heatsink, their cathodes will be shorted together — which is acceptable for parallel operation. If the heatsink is grounded (chassis), use an insulating pad (TO-220 mica or silicone pad) between the tab and heatsink, and an insulating bushing on the mounting screw.
Q: What heatsink is needed for MBR20150CT at 20A?
A: At 20A total (10A per diode), power dissipation = 2 × (10A × 0.75V) = 15W. With TO-220 thermal resistance junction-to-case of ~2°C/W, junction temperature rise = 15W × 2 = 30°C above case. Use a heatsink with thermal resistance ≤2°C/W with thermal paste to keep junction below 125°C at 25°C ambient.
Package Contents
- 5× MBR20150CT Dual Schottky Rectifier Diode (TO-220)
