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Reverse Voltage Protection and Ideal Diodes
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Pololu Reverse Voltage Protectors are tiny 0.3″×0.5″ modules that can be inserted between a power supply and its load to protect that load from damage in the case of accidental reversal of power polarity. They operate from 4 V (3.2 V after startup) to 60 V and provide protection from negative voltages down to -60 V. They are available in two different power levels (10 A or 12 A) and with or without reverse current blocking, providing four options in all:
| Pololu Item # |
Max current |
On resistance | Reverse current blocking |
Price |
|---|---|---|---|---|
| #5380 | 10 A | < 10 mΩ | no | $1.49 |
| #5381 | 12 A | < 5 mΩ | $1.95 | |
| #5382 | 10 A | < 10 mΩ | yes (ideal diode) | $1.75 |
| #5383 | 12 A | < 5 mΩ | $2.25 |
The versions without reverse current blocking are suitable for use with loads that have the potential to send current back into the power supply, such as motors. The versions with reverse current blocking act as ideal diodes, preventing any current from flowing from the load back into the supply.
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Products in category “Reverse Voltage Protection and Ideal Diodes”
| Pololu item #: 5380 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
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This module protects a connected load from reverse voltages down to -60 V. This version does not block reverse current, making it suitable for applications such as motor control, which have the potential to deliver energy back into the supply.
| Operating voltage1 | Max current | On resistance | Reverse current blocking |
|---|---|---|---|
| 4-60 V | 10 A | < 10 mΩ | no |
1 Operates down to 3.2 V after startup.
| Pololu item #: 5381 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This module protects a connected load from reverse voltages down to -60 V. This version does not block reverse current, making it suitable for applications such as motor control, which have the potential to deliver energy back into the supply.
| Operating voltage1 | Max current | On resistance | Reverse current blocking |
|---|---|---|---|
| 4-60 V | 12 A | < 5 mΩ | no |
1 Operates down to 3.2 V after startup.
| Pololu item #: 5382 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This module protects a connected load from reverse voltages down to -60 V. This version acts as an ideal diode, blocking reverse current from output to input.
| Operating voltage1 | Max current | On resistance | Reverse current blocking |
|---|---|---|---|
| 4-60 V | 10 A | < 10 mΩ | yes (ideal diode) |
1 Operates down to 3.2 V after startup.
| Pololu item #: 5383 | |
| Brand: Pololu | supply outlook |
| Status: Active and Preferred | |
|
|
|
This module protects a connected load from reverse voltages down to -60 V. This version acts as an ideal diode, blocking reverse current from output to input.
| Operating voltage1 | Max current | On resistance | Reverse current blocking |
|---|---|---|---|
| 4-60 V | 12 A | < 5 mΩ | yes (ideal diode) |
1 Operates down to 3.2 V after startup.
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