HySecurity MX4387, SWITCH, ROTARY, 3P, 25A, 600V
The HySecurity MX4387 is a 3-pole rotary switch used in select HySecurity high-voltage control and disconnect assemblies. The uploaded product name identifies it as a 3-pole, 25 amp, 600 volt switch, which places it in the incoming power or disconnect-control side of the operator rather than in a low-voltage accessory input. This part is commonly associated with StrongArm M30/M50 CE service references, especially where MX4388 is used as the add-on pole to convert the switch arrangement from 3-pole to 4-pole. Because this is a line-voltage component, correct voltage rating, pole count, amp rating, shaft/operator handle style, enclosure fit, and wiring diagram must be verified before ordering. A wrong switch can create unsafe disconnect behavior, incorrect phase switching, or an enclosure fit problem.
Compatible With
This HySecurity part should be matched by part number, operator model, operator generation, and the original parts diagram. Compatibility below is written carefully because similar HySecurity service parts may look close but use different mounting, ratings, wiring, or mechanical fitment.
- Select HySecurity StrongArm M30 CE applications where MX4387 is listed
- Select HySecurity StrongArm M50 CE applications where MX4387 is listed
- StrongArm CE disconnect switch assemblies that require a 3-pole, 25A, 600V rotary switch
- Used with related MX4388 add-on pole when a 4-pole arrangement is required by the operator design
- Not for low-voltage accessory inputs, keypad circuits, loop detector wiring, or standard control station wiring
Features and Specifications
| Manufacturer | HySecurity / Nice |
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| Product Type | Rotary disconnect switch |
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| Part Number | MX4387 |
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| Pole Count | 3 pole |
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| Amp Rating | 25A |
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| Voltage Rating | 600V as listed in uploaded product name |
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| Application | Select StrongArm CE line-voltage disconnect assemblies |
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| Compatible Operator Type | Select StrongArm M30/M50 CE operators when specified |
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| Related Accessory | MX4388 add-on pole for 4-pole conversion where required |
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| Notes | High-voltage component; match wiring diagram and original switch |
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Also Known As / Related Part Numbers
- MX4387
- HYS-MX4387
- HySecurity MX4387
- Nice HySecurity MX4387
- 3P 25A 600V rotary switch
- StrongArm CE disconnect switch
- MX4388 related add-on pole
Technician Note
This is not the type of part to match by appearance alone. Check the exact switch rating, number of switched poles, shaft and handle arrangement, terminal layout, and operator wiring diagram before replacing it.
Before Ordering
- Confirm the original switch is marked MX4387 or matches the HySecurity parts diagram
- Verify 3-pole configuration and electrical ratings
- Confirm whether the installation also requires MX4388 add-on pole
- Check the operator voltage, phase, and CE wiring diagram
- Have line-voltage work performed by a qualified technician
Important Ordering Warnings
- Do not use this part as a generic control switch or push button
- Do not bypass or reduce disconnect-switch functionality
- Wrong pole count or wiring can create an unsafe power-isolation condition
Professional Advisory
Because this switch is associated with high-voltage operator power, installation and troubleshooting should be handled by a qualified gate technician or electrician familiar with HySecurity StrongArm CE wiring.
Product Questions and Answers
What is the HySecurity MX4387 used for?
MX4387 is a 3-pole rotary switch used in select HySecurity disconnect or high-voltage control assemblies, commonly associated with StrongArm CE applications.
Is MX4387 the same as MX4388?
No. MX4387 is the base 3-pole rotary switch. MX4388 is the add-on pole used to convert the related switch assembly from 3 pole to 4 pole where required.
Can this switch be used on low-voltage gate controls?
No. This is not a keypad, push-button, loop, or low-voltage accessory switch. It should only be used where the HySecurity wiring diagram calls for it.
What should I verify before ordering MX4387?
Verify the part number, voltage, amp rating, pole count, terminal layout, shaft/handle style, operator model, and wiring diagram.
Should power be disconnected before replacing this switch?
Yes. This is a high-voltage component. Power must be safely disconnected and verified by a qualified person before service.
