Golf Cart Parts and

Golf Cart Accessories

golf ​​​​​​​Carts Unlimited

Pre-Charge Resistor
6 amp REGEN diode

Use this button to select 1  resistor and 1 diode  


 Select voltage and terminal size when ordering

Note single diode purchase option in drop down menu.

SW180 and MZJ200 solenoids use 5/16 ring terminals

MZJ400 solenoid requires 3/8 ring terminals

What is magnetic breakout  & why do I need it ? 

#3.        SW180

Heavy-duty solenoid with magnetic breakouts

available ​in 36 or 48 volts

​New low  price $66 each 


SW180 voltage

                      Carts Unlimited Tech Tips                                                    

Solenoid not working

 
How to verify the solenoid is actually working using a voltmeter 

Remove the pre-charge resistor from the big terminals. 

Put the voltmeter black (common) on battery main (-) and the red lead on the solenoid big terminal with the battery Main (+) cable on it

The voltmeter should read the same as the battery pack here.

 

Now press the pedal so the solenoid clicks and move the red lead to the other big solenoid post = this should also now read the same as the battery pack.

Now release the pedal and the power should disappear from the second big post.

Repeat the test several times to see that the solenoid is consistently closing (power at both big terminals) when it clicks and opening (power at one big terminal) when the pedal is lifted. 

Solenoid not clicking

The solenoid makes a click sound when it activates or closes and another click when it opens. Power flows between the large posts when the solenoid is closed.

Solenoid activation requires battery pack voltage is present and readable with a voltmeter between the 2 small terminals. It takes + on one small terminal and – on one small terminal to activate the solenoid.

The solenoid should only be closed when the cart is running. Never leave the solenoid closed (activated) when the cart is not in use.

Magnetic breakouts reduce arc damage which is caused by making and breaking the contactor connection.  The arc that is caused each time you press or release the gas pedal carries particles of materials with it. Over time these particles are transferred from one contact surface to the other creating pits and buildups which ultimately prevent good contact between the surfaces and reduce contact integrity.

The magnetic breakout creates a magnetic field which draws these particles away from the contacts and prevents their adhesion. The result is that the contacts retain their integrity longer.

These solenoids do have a directional mandate which is clearly marked on the top of the solenoid. The large battery + cable must connect to the terminal marked with the + signs. Note the small terminals are also marked + and -.


Please use link at bottom of the page  for install info.


#4

Our heavy duty and super duty solenoids have 4 terminals

2 main terminals for the high amperage cables and 

2 small terminals for the activation or trigger wires

Use this button to purchase just a diode for your solenoid.


This item is available in one size for all solenoids and all voltages. 

Remember each new solenoid includes the part below.

This is a replacement diode for solenoid or reversing contactors.


Be certain you are selecting the correct terminal ends.

Ring terminals and spade terminals are the menu options

Above the MZJ 400 solenoid has ring terminals.

The SW 180 solenoid uses spade terminals.

All reversing contactors use 2 diodes with spade terminals. 

All diodes are polarity sensitive. This polarity is identified by the red connector on the + side. Polarity must be observed as they are installed between a + and - terminal


Use this button to purchase just a resistor for your solenoid.


This item needed to protect the controller and must be upgraded when going from 36 to 48v operation. Remember each new solenoid includes the part below.


​SW180 and MZJ200 solenoids use 5/16 ring terminals
MZJ400 solenoid requires 3/8 ring terminals

#7      Use this button to purchaseEzgo REGEN diode for your solenoid.


This item is available in one size for all solenoids and all voltages. 

 

This is a replacement  REGEN diode for EZGO using XCT controller


Polarity must be observed per the  install instructions


#5

Select voltage / terminal size

200 amp continuous 800 amp peak rating

     Use with 500 amp or less controls

#6

Please note the new Alltrax XCT controllers 

have a built in resistor & diode 

3 amp diode
MZJ400A 36-48v
----------------------------------------------------------------------------

#1.  400/1000 amp Super Duty Solenoid  - Our most popular solenoid !

NOW just  $69 each& the 2nd one ships free when you buy 2 or more

Our Best Solenoid. Good with all 400 amp & up controls.  

Silver weld resistant contacts provide superior durability.

Requires 3/8th cable lugs  on the big terminals.  

Dual Stage 400 Super solenoid can run on 36 volts or 48 volts. 

Not polarity sensitive. Put the little + and - wires on either pole.

  Add resistors and diodes if needed in the drop down menu below...

Here are the heavy duty and super duty solenoids you need to

get you out there and bring you back.  

These solenoids are also called contactors & main contactors in the cart diagrams.
Here are a few things you should know when choosing a solenoid. 
All the amperage that goes to the motor goes through the solenoid. 
The solenoid is the high amperage cut off (safety) switch in the cart.
When upgrading the controller the solenoid must be upgraded

to handle the increased flow.
Heavy duty contactors have high quality copper contacts.
Super duty contactors have larger better quality silver oxide contacts. 
Unlike automotive solenoids, these solenoids are built for continuous duty.
Each solenoid has a continuous and a peak rating of 200a/800a or 400a/1000a 

Is my original solenoid good enough?
Your golf cart is originally fitted with a 50 -80 amp solenoid.
This was fine for the game of golf.
Off the course use with added seating, bigger tires, and off road activities

increase the motor work loads. 
This demand for more power equals a demand for more amperage.  
Higher amperage flow requires bigger controller, cables, and Solenoid.


Properly sized solenoids are a MUST.


Heavy Duty 200a and Super Duty 400a

Main Contactors &  Solenoids

Solenoids & Contactors