This module protects a connected load from reverse voltages down to -75 V (80 V absolute max). This version does not block reverse current, making it suitable for applications such as battery-powered motor control where delivering energy back into the supply is desirable.

Pololu Reverse Voltage Protectors are compact 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 (green PCBs) or 75 V (red PCBs) and provide protection from negative voltages down to -60 V or -75 V, respectively. They are available in different power levels and with or without reverse current blocking:

The versions without reverse current blocking are suitable for applications such as battery-powered motor control where the ability to deliver energy back into the supply is desirable. The versions with reverse current blocking act as ideal diodes, preventing any current from flowing from the load back into the supply.

75V-max Pololu Reverse Voltage Protectors are available                                    60V-max Pololu Reverse Voltage Protectors are available

in 17A (left) and 8A (right) versions.                                                                                in 20A/25A (left) and 10A/12A (right) versions.

Size comparison of the Pololu Reverse Voltage                                                            Pololu Power ORing Ideal Diode Pair, 4-60V, 6A.

Protectors: 75V, 17A (larger red PCB); 60V, 20A/25A

(larger green PCB); 75V, 8A (smaller red PCB);

and 60V, 10A/12A (smaller green PCB).

Details for item #5358/5359

Pololu Reverse Voltage Protector, 4-75V, 8A, top view.                                Pololu Reverse Voltage Protector, 4-75V, 8A, bottom view.

This module uses an AP74502HQ (1MB pdf) reverse voltage protection controller and N-channel MOSFET to provide protection from negative voltages down to -75 V. It operates from 4 V (3.2V after startup) to 75 V (80 V absolute max) and has a VIN path impedance of approximately 15 mΩ when the MOSFET is on (i.e. when power is connected with the proper polarity), enabling currents up to around 8 A continuous (and up to around 15 A for a few seconds). This version does not block reverse current, making it suitable for applications such as battery-powered motor control where delivering energy back into the supply is desirable.

Connections:

Examples of various connectors that can be used with the Pololu Reverse Voltage Protector, 4-75V, 8A (from left to right: 5mm terminal blocks, 3.5mm terminal blocks, 0.1″ headers).

The following pictures show examples with the identically sized 60V-max 10A/12A Pololu reverse voltage protectors, which have green PCBs:

Pololu 10A/12A Reverse Voltage                                                                                Pololu 10A/12A Reverse Voltage

Protector soldered to a pair of two-pin,                                                                   Protector soldered with 0.1″ male headers

5mm-pitch screw terminal blocks (not included).                                                   (not included) for use in a breadboard.

Optional TVS diode mounting location

There are pads for adding an optional SMB-size transient voltage suppressor (TVS) across VIN and GND on the bottom side of the board:

We can manufacture these with the TVS diode of your choice for custom high-volume orders (typically at least a few hundred pieces). If you are interested in such a customization, please contact us for a quote.

Schematic:

Specifications:

• Minimum operating voltage : 4 V1
• Maximum operating voltage : 75 V2
• Maximum current : 8 A/17A
• Reverse current blocking : N
• Version : 75V, ​8A/17A
• Identifying markings
• PCB dev codes : rvp03a/rvp03b
• Other PCB markings : 0J4045/0J4046

Package Includes:

• 1 x Pololu 5358/5359 Reverse Voltage Protector, 4-75V, 8A/17A