# Pololu Ideal Diode Reverse Voltage Protector, 4-60V, 25A

**Type:** Product page · **SKU:** POLOLU-5389 · **Brand:** [Pololu](https://core-electronics.com.au/brands/pololu-australia)
**Page:** https://core-electronics.com.au/pololu-ideal-diode-reverse-voltage-protector-4-60v-25a.html ([markdown](https://core-electronics.com.au/pololu-ideal-diode-reverse-voltage-protector-4-60v-25a.html.md))

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...

## Pricing

- **Price:** $13.95 (inc GST) — $12.68 AUD, exc GST
- **Quantity discounts:** 10+ $12.17 (exc GST) · 25+ $11.79 (exc GST)

## Availability & dispatch

- In stock, ships same business day if ordered before 2PM (Australia/Sydney).
- We can dispatch 3 today, and up to 500 more in 4–7 days.

## Description

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 and provide protection from negative voltages down to -60 V. They are available in different power levels and with or without reverse current blocking:

| Reverse protection | Max current | MOSFET on resistance | Size | Pololu Item # |
|---|---|---|---|---|
|  |
| Reverse voltage only | 10 A | < 10 mO | 0.3"×0.5" | [\#5380](https://core-electronics.com.au/pololu-reverse-voltage-protector-4-60v-10a.html) |
| 12 A | < 5 mO | [\#5381](https://core-electronics.com.au/pololu-reverse-voltage-protector-4-60v-12a.html) |
| 25 A | < 1.5 mO | 0.435"×0.7" | [\#5387](https://core-electronics.com.au/pololu-reverse-voltage-protector-4-60v-25a.html) |
|  |
| Reverse voltage and current (ideal diode) | 10 A | < 10 mO | 0.3"×0.5" | [\#5382](https://core-electronics.com.au/pololu-ideal-diode-reverse-voltage-protector-4-60v-10a.html) |
| 12 A | < 5 mO | [\#5383](https://core-electronics.com.au/pololu-ideal-diode-reverse-voltage-protector-4-60v-12a.html) |
| 25 A | < 1.5 mO | 0.435"×0.7" | [\#5389](https://core-electronics.com.au/pololu-ideal-diode-reverse-voltage-protector-4-60v-25a.html) |

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.

| \| [![](https://core-electronics.com.au/attachments/localcontent/0J13039_330541f6dc3.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13039_393226c4f02.jpg) \| \|---\| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J13040_36674a6f69b.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13040_21676996606.jpg) \| \|---\|---\| \| Size comparison of the 25A (top) and 10A/12A (bottom) Pololu Reverse Voltage Protectors. \| |
|---|

**Note:** Any voltage on the output will reduce the 60 V maximum rating. For example, if there is a large capacitor charged to 24 V on the ouput, the minimum negative voltage would be -36 V.

**Details for item #5389**

| \| [![](https://core-electronics.com.au/attachments/localcontent/0J13031_36864610b4f.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13031_7366998ad08.jpg) \| \|---\| \| Pololu Ideal Diode Reverse Voltage Protector, 4-60V, 25A, top view. \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J13032_3620419f0cc.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13032_585376b915b.jpg) \| \|---\|---\| \| Pololu 25A Reverse Voltage Protector/Ideal Diode Reverse Voltage Protector, bottom view. \| |
|---|

This module uses an [LM74700-Q1 reverse voltage protection ideal diode controller](https://www.ti.com/lit/gpn/LM74700-Q1) and N-channel MOSFET to provide protection from negative voltages down to -60 V. It operates from 4 V (3.2V after startup) to 60 V and has a VIN path impedance of approximately 1.5 mO when the MOSFET is on (i.e. when power is connected with the proper polarity), enabling currents up to around 25 A continuous (and up to around 50 A for a few seconds). This version acts as an ideal diode, blocking reverse current from output to input.

| Operating voltage | Max current | MOSFET on resistance | Reverse current blocking | Size |
|---|---|---|---|---|
| 4 V – 60 V\* | 25 A | < 1.5 mO | yes (ideal diode) | 0.435"×0.7" |
| \* Operates down to 3.2 V after startup. |

**Connections**

| [![](https://core-electronics.com.au/attachments/localcontent/0J13036_29502af492b.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13036_1179784ac58.jpg) |
|---|

Supply power and ground connect to the VIN and GND side of the board, and the VOUT and GND pins connect to the load. If the supply is connected correctly, with its positive voltage on VIN, the power will pass through the board to VOUT. If the supply is connected incorrectly, with the positive voltage on GND, supply power will not pass through to the output, and any connected load will be protected from the reversed supply voltage.

The larger input and output through-holes can accommodate [5mm-pitch terminal blocks](https://core-electronics.com.au/screw-terminal-block-2-pin-5-mm-pitch-side-entry-4-pack.html) or up to 14 AWG wires, and the smaller through-holes are spaced for [0.1"-pitch headers](https://core-electronics.com.au/connectors-sockets/headers.html).

| \| [![](https://core-electronics.com.au/attachments/localcontent/0J13033_36254ff2f7f.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13033_63612680df5.jpg) \| \|---\| \| Pololu 25A Reverse Voltage Protector with a pair of two-pin, 5mm-pitch screw terminal blocks (not included). \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J13034_323543f2c38.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13034_54140f95107.jpg) \| \|---\|---\| \| Pololu 25A Reverse Voltage Protector with a pair of two-pin, 5mm-pitch screw terminal blocks (not included). \| | \| [![](https://core-electronics.com.au/attachments/localcontent/0J13038_14624899907.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13038_27810b684f1.jpg) \| \|---\|---\| \| Pololu 25A Reverse Voltage Protector soldered with 14 AWG wires. \| |
|---|

**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:

| [![](https://core-electronics.com.au/attachments/localcontent/0J13037_2973371472e.jpg)](https://core-electronics.com.au/attachments/localcontent/0J13037_19533de30c5.jpg) |
|---|

Pololu 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](https://core-electronics.com.au/contact) for a quote.

**Schematic**

| [![](https://core-electronics.com.au/attachments/localcontent/0J12962_510551e2fd9.jpg)](https://core-electronics.com.au/attachments/localcontent/0J12962_318528f30ca.png) |
|---|

**Dimensions**

 | Size: | 0.3" × 0.5" × 0.11" |
|---|---|
| Weight: | 0.7 g |

**General specifications**

 | Minimum operating voltage: | 4 V[1](https://core-electronics.com.au/#note1) |
|---|---|
| Maximum operating voltage: | 60 V |
| Maximum current: | 25 A |
| Reverse current blocking: | Y |

**Identifying markings**

 | PCB dev codes: | rvp01b |
|---|---|
| Other PCB markings: | 0J4043 |

**Notes:**

1Can operate down to 3.2V after startup. **File downloads**

- **[Dimension diagram of the Pololu Reverse Voltage Protectors](https://core-electronics.com.au/attachments/localcontent/pololu-reverse-voltage-protectors_39495ec28d6.pdf) (395k pdf)**
- **3D model of the Pololu 25A Reverse Voltage Protectors (3MB step)**
- **Drill guide for the Pololu 25A Reverse Voltage Protectors (16k dxf)**
    
    This DXF drawing shows the locations of all of the board’s holes.
 
**Recommended links**

- **[TI LM74500-Q1 datasheet](https://www.ti.com/lit/gpn/LM74500-Q1)**
- **[TI LM74700-Q1 datasheet](https://www.ti.com/lit/gpn/LM74700-Q1)**

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/P/O/POLOLU-5389-1.jpg)