Alarm Controls MCK-4 Mortise Cylinder Key Switch, Single Gang SPDT Momentary
SKU
MCK-4
Model No
MCK-4
was $80.30 Special Price $78.25
Product Highlights
- Stainless Steel Plate Accepts Standard 1-1/8" Mortise Cylinders
- Depth behind Plate is 1.25"
- Switches Terminated in Colored Leads
- Switch Contacts Rated 4A @ 28VDC
- LEDs Operate on 12 or 24 Volts AC or DC

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The MCK-4 from Alarm Controls is a mortise cylinder key switch with single gang SPDT momentary, designed for durability and reliability in access control systems.
Alarm Controls MCK-4 Key Switch Features
- Stainless Steel Plate: Accepts standard 1-1/8" mortise cylinders, ensuring compatibility with most locking systems.
- Compact Design: Depth behind plate is only 1.25", allowing easy installation in tight spaces.
- Colored Lead Termination: Switches terminated in colored leads, simplifying wiring and reducing installation time.
- High-Performance Ratings: Switch contacts rated 4A @ 28VDC, providing reliable operation for various applications.
- Versatile LED Operation: LEDs operate on 12 or 24 volts AC or DC, accommodating different power sources.
- Security Features: Tamper-proof design with slotted-head screws included, enhancing security against unauthorized access.
Detailed Specifications for MCK-4
| Feature | Detail |
| Type | Mortise Cylinder Key Switch |
| Operation | SPDT Momentary |
| Plate Material | Stainless Steel |
| Mortise Cylinder Size | Standard 1-1/8" |
| Depth Behind Plate | 1.25" |
| Contact Rating | 4A @ 28VDC |
| LED Voltage Compatibility | 12 or 24 Volts AC/DC |
| Mounting Security | Tamper-Proof, Slotted-Head Screws Included |
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