how to install 50 amp circuit breaker for trolling motor

How to Install a 50 amp Circuit Breaker for the Trolling Motor?


When installing a trolling motor, it is strongly advised to use a circuit breaker or fuse. With this breaker installed, power will be cut off when the power draw reaches 50 amps, preventing motor damage. 

This breaker is designed for motors that draw less than 60 amps during normal operation, but it can also be used with other motors.

So, how to install a 50 amp circuit breaker for the trolling motor? 

This circuit breaker is simple to install between the battery and the motor. This breaker comes with 6″ of cable for connecting to the battery and 4 feet of cable for connecting to the trolling motor or power lead. The linking of the wire to the circuit breaker will be determined by the terminal.

The influence of circuit breakers for the battery powered trolling motor will be discussed in this article. And how to put them in. Let’s begin.

What Exactly is a Circuit Breaker, and How does it Function?

A circuit breaker provides protection the electricity grid and battery of your trolling motor from impairment resulting from electric prevailing overabundance or short circuits.

The engine and batteries are safeguarded against electrical overload by circuit breakers, which “trip” (stop electricity) when they reach a particular amperage.

Circuit breakers are classified into two types. All these types of circuit breakers protect your motor equally well.

Need a Circuit Breaker for Your Electric Trolling Motor?

Although they might seem tiny, circuit breakers are crucial to the functionality of your electric trolling motor. They safeguard the motor’s internal electrical system as well as the wiring on your boat. Trolling motors are frequently overloaded.

They are also vulnerable to short-circuit damage. This is prevented by circuit breakers. The circuit breaker will experience an electrical spike beforehand if your trolling motor experiences a heavy load or short circuit.

It will crash or shut down as a consequence. Troilling motor can cause other problems also.

Once your propeller or trolling motor encounters additional resistance, an electrical surge occurs. This can occur if the propeller becomes entangled in weeds or becomes stuck among rocks.

Because the motor must function at the required frequency, more power is drawn in to overcome the resistance.

This rise in the electrical current can occasionally cause a short circuit. This can cause significant damage to many important components of the motor if the circuit breaker is not in place.

Aside from some external forces, the circuit may encounter resistance if:

  • A long wire connects the power source and the device.
  • The wire diameter is insufficient.
  • The wire’s material and the number of strands
  • Any corroded or loose electrical circuit connections

If you’re wondering whether or not you should install a circuit breaker in your trolling motor, the answer is yes. Moreover, your trolling motor can lose power.

In bigger vessels, any conductor current – carrying wire that is not insulated needs to be protected by a circuit breaker or fuse.

The Various Types of Circuit Breakers

There are various types. Normally, the power of the trolling motor that is placed in your boat determines what kind of fuse box you need. You can install a trolling motor circuit breaker, for instance, if the highest electricity your trolling engine can handle is 50 amps.

The following are some distinctive aspects to take into account before buying a circuit breaker for your motor:

  1. The thrust or model of the motor
  2. Your motor’s maximum ampere draw
  3. The capacity of the VDC
  4. The wire extension’s length

50 Amp Circuit Breaker for Trolling Motor

There can be different types of circuit breakers for 50 amps. These are some examples:

  • 50 Amp Circuit Breaker (12 VDC) – This circuit breaker can handle trolling motors that weigh 30, 40, and 45 pounds. These motors have maximum amperage draws of 30 and 42 amps, respectively.
  • 50 amp circuit breaker (24-volt direct current) – This circuit breaker is suitable for a 70-pound trolling motor. This motor’s maximum ampere draw is 42 amps.
  • 50 amp circuit breaker (36-volt direct current) – This circuit breaker is suitable for a 101-pound trolling motor. This motor’s maximum ampere draw is 46 amps.
  • 50 amp circuit breaker (48-volt direct current) – This circuit breaker is suitable for an E-Drive motor. These motors have a maximum ampere draw of 40 amps.

The aforementioned circuit breakers can adequately protect your trolling motors if the essential requirements are met.

Here are recommendations of circuit breakers that are adequate for your trolling motor.

Product 1
Product 2

The voltage loss shouldn’t be greater than 5% when the motor is operating at full capacity.

How to Install a Trolling Motor Circuit Breaker

A circuit breaker for your trolling motor can be installed by a marine technician. However, if you want to do the job yourself, here are some guidelines to help you:

Select a suitable location in your boat for mounting the circuit breaker. It is preferable to locate the breaker near the battery or batteries.

Utilize the two holes at the base of the circuit breaker to mount it.

  1. Link the “BAT” terminal on the breaker towards the positive conclusion of something like the battery post.
  2. Locate the POSITIVE wire that connects your electric trolling motor to your marine battery.
  3. Prepare an extra battery cable or cut the cable where you want to install the circuit breaker. It should be located just next to the battery, not over 1.8m away. If you snip the cable, you will have to connect wire terminal ends in order to connect it.
  4. There will be two terminals on the circuit breaker. They may be labeled BAT (power pack) and AUX (motor), IN (power supply) and OUT (motor), or not labeled at all. This is irrelevant because electricity flows through both methods, so you can’t accidentally switch the terminals.
  5. The AUX and BAT terminals on the circuit breaker will be labeled. One will be connected to the trolling motor, while the other to the battery.
  6. Hook up the trolling motor’s positive power cord to the terminal labeled “AUX” on the breaker.

The technique of attaching the cut wire to the terminals of the circuit breaker will be determined by the terminal itself.

Additional Guidelines for Buying a Circuit Breaker

When purchasing a circuit breaker for your trolling motor, keep the following in mind to ensure adequate circuit protection:

  1. Choose a trip-free circuit breaker that can be manually reset.
  2. The circuit breaker must be capable of interrupting enough amps.
  3. The circuit breaker should continue to function after just a short circuit or the other electrical malfunction.
  4. In some cases, a fuse should be installed before the circuit breaker. This may boost the circuit breaker’s ability to disrupt amps.
  5. Check the circuit breaker for ignition protection. This is done by running an electrical test while applying four times the breaker’s current rating.
  6. Seal the positive terminal(s) of the battery(s) with electrical tape or a shielding to avoid short circuits. This can prevent it from getting into contact with anything that might lead to a malfunction. Such as metal objects, errant wiring, or other things.

You need to choose the correct circuit breaker and wiring for installation on your motor.

Things You Need to Know

Circuit breakers are critical components of your electric trolling motor’s circuit protection.The trolling motor may get damaged if a circuit breaker isn’t used.

If a fire starts as a response of an overheat or short circuit, you might be at risk.


How many amps does a trolling motor breaker require?

Overall, if the trolling motor weighs between 30 and 45 pounds, a 50-amp breaker is preferable. Those weighing 50 to 55 pounds are more likely to succeed when paired with a 60-amp one.

What wire gauge is required for a trolling motor?

We recommend using #10 AWG 105C wire when extending the cables of your trolling motor up to 94″. (for 55lb Thrust Trolling Motors and smaller). If you need to extend the cables beyond 94″, we recommend #8 AWG 105C.

Is a circuit breaker required for a winch?

It is not advisable to use a circuit breaker or a fuse. Your winch can consume 400 amps. A single battery can only supply 700 amps for a limited time. A fuse or circuit breaker too big to allow your winch to function cannot protect anything.


I hope you have learned all about how to install a 50 amp circuit breaker for the trolling motor.

Installing an electric trolling motor is a simple task if you read the installation manual. consult the USCG code page, and plan ahead of time.

Thank you for reading.

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