The HySecurity MX3402 is a replacement motor start switch for select HySecurity and Nice HySecurity gate operator motors. It is commonly listed as START SWITCH, 1HP - 2HP, 60HZ and is used in compatible single-phase 60Hz motor start circuits.
This switch is part of the motor starting system. On compatible single-phase motors, the start switch works with the start circuit and capacitor components to help the motor start correctly. If the start switch fails, the motor may hum, fail to start, trip protection, start intermittently, or require the gate to be unloaded before it will run. Those same symptoms can also be caused by a failed capacitor, low voltage, bad motor winding, seized pump, worn coupler, bad wiring, or a gate that is mechanically binding.
HySecurity technical guidance identifies MX3402 as the Stearns start switch used on Baldor motor part numbers MX000784 and MX000785. HySecurity also publishes separate start switch guidance for Leeson motors, including MX3753 for certain Leeson applications, and MX5680 for Baldor MX5546. Because of those differences, the motor tag should be checked before ordering.
The MX3402 start switch helps control the motor start circuit on compatible single-phase HySecurity operator motors. During startup, the motor needs the proper start circuit to generate starting torque. After the motor comes up to speed, the start circuit must operate correctly so the motor can continue running normally.
If the start switch is damaged, worn, stuck, miswired, or matched to the wrong motor, the motor may not start correctly. Replacing the start switch can correct a failed switch, but it will not repair a bad start capacitor, run capacitor, motor winding, centrifugal mechanism, seized hydraulic pump, failed motor-to-pump coupler, low incoming voltage, or a gate that is dragging.
The HySecurity MX3402 is intended for select HySecurity / Nice HySecurity single-phase 60Hz motor applications where MX3402 is specified by the motor tag and HySecurity service documentation. Compatibility depends on the motor brand, motor part number, horsepower, frequency, wiring, start circuit style, and current HySecurity parts guidance.
Do not assume MX3402 fits every HySecurity motor. HySecurity has used Baldor, Leeson, and other motor configurations with different start switches and capacitors. Always identify the motor by the catalog number on the motor tag before ordering.
HySecurity start switch selection depends on the motor manufacturer and motor part number. Similar operators may use different motors, and the correct switch is determined by the motor tag.
If the motor has been replaced in the past, do not rely only on the operator model. Use the motor catalog number on the actual installed motor to choose the correct start switch.
MX3402 should be selected by the motor tag, not only by operator model or horsepower. Confirm the motor manufacturer, motor catalog number, horsepower, voltage, frequency, and start switch location before ordering.
If the motor only hums or will not start, test the full start circuit before replacing parts. A failed capacitor can look like a bad start switch, and a seized hydraulic pump or stripped coupler can make the motor start circuit appear weak. Diagnose the motor, capacitor, wiring, and mechanical load before assuming MX3402 is the only failed part.
| Feature / Specification | Details |
|---|---|
| Manufacturer | HySecurity / Nice HySecurity |
| Part Number | MX3402 |
| Product Type | Motor start switch |
| Common Description | START SWITCH, 1HP - 2HP, 60HZ |
| Alternate Description | Electronic start switch for select single-phase HySecurity operator motors |
| Frequency | 60Hz applications where specified |
| Horsepower Reference | Your part description lists 1 HP to 2 HP; some distributor listings also mention 3/4 HP applications where confirmed |
| Motor Type | Select single-phase gate operator motors using the MX3402 start switch |
| Confirmed HySecurity Motor References | Baldor MX000784 and MX000785 motor applications where HySecurity identifies Stearns MX3402 |
| Related Switches | MX3753 for select Leeson motors; MX5680 for Baldor MX5546 applications; verify by motor tag |
| Function | Controls the start circuit on compatible single-phase operator motors |
| Included Items | Start switch; verify gasket, screws, wiring terminals, instructions, and any included hardware against the current supplier package |
| Not Included Unless Listed | Motor, start capacitor, run capacitor, contactor, relay, wiring harness, hydraulic pump, pump coupler, and operator hardware unless separately listed |
A motor that hums, trips, or will not start is not automatically a bad start switch. Test the start capacitor, run capacitor, motor windings, incoming voltage, wiring terminals, and mechanical load before replacing parts. On hydraulic operators, also check that the pump is not seized and that the motor-to-pump coupler is not damaged.
HySecurity start switch selection should be based on the motor tag. The operator model alone is not enough because the same operator family may have used different motor brands or motor revisions over time.
Disconnect all power before servicing the motor start switch or capacitor circuit. Motor start circuits may contain line voltage and stored capacitor energy. Label wires before removal and compare the old switch location and wiring to the current HySecurity service instructions.
After replacement, verify that the motor starts cleanly, runs normally, and does not overheat, hum, or trip protection. If the motor still struggles to start, continue diagnosing the capacitor circuit, incoming power, motor windings, hydraulic pump, coupler, and gate movement before assuming the new switch is defective.
Motor start switch replacement can involve line voltage, capacitors, rotating motor parts, hydraulic pump load, and moving gate equipment. A qualified HySecurity gate technician or electrician should handle the repair when the motor wiring is unknown, the operator trips repeatedly, capacitors are involved, or the gate has mechanical or hydraulic load issues.
Do not bypass motor start switches, capacitors, overload protection, disconnects, fuses, monitored safety devices, photo eyes, safety edges, limits, or controller protections to make the operator run. The motor start circuit should be repaired correctly and the operator should be fully tested before returning it to service.
The HySecurity MX3402 is a motor start switch used on select HySecurity single-phase 60Hz gate operator motors where this part number is specified.
HySecurity technical guidance identifies MX3402 for Baldor motor part numbers MX000784 and MX000785. Some listings also describe use with 3/4 HP, 1 HP, and 2 HP single-phase motors where confirmed by motor tag.
Do not assume so. HySecurity identifies MX3753 for certain Leeson motor applications. Check the motor tag and HySecurity parts guidance before choosing between MX3402 and MX3753.
No. MX3402 and MX5680 are different start switch references. HySecurity identifies MX5680 for Baldor MX5546 motor applications, while MX3402 is identified for Baldor MX000784 and MX000785 applications.
It may help if the start switch has failed, but a humming motor can also be caused by a failed capacitor, low voltage, bad winding, seized pump, damaged coupler, or a gate that is mechanically binding.
Motor start switch replacement involves line voltage and capacitor circuits. A qualified gate technician or electrician should handle the repair if you are not trained to service motor electrical components.