Alarm Controls MCK-3-4 Mortise Cylinder Key Switch, 1.75" DPDT Alternate
SKU
MCK-3-4
Model No
MCK-3-4
$87.65
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-3-4 from Alarm Controls is a reliable and efficient mortise cylinder key switch that features a 1.75" DPDT alternate design with integrated green and red LED indicators, ensuring clarity and ease of use.
Alarm Controls MCK-3-4 Key Switch Features
- Stainless Steel Plate: Accepts standard 1-1/8" mortise cylinders, ensuring compatibility and durability.
- Compact Depth: The depth behind the plate is just 1.25", making it easy to install in tight spaces.
- Colored Leads: Switches are terminated in colored leads, simplifying wiring and installation procedures.
- High Rated Switch Contacts: Rated at 4A @ 28VDC, providing reliable performance for various applications.
- Versatile LED Operation: LEDs operate on both 12 or 24 volts AC or DC, offering flexibility in various setups.
- Tamper-Proof Design: Comes with a tamper-proof and slotted-head screw for increased security.
Detailed Specifications for Alarm Controls MCK-3-4
| Feature | Details |
|---|---|
| Model | MCK-3-4 |
| Type | Mortise Cylinder Key Switch |
| Contact Rating | 4A @ 28VDC |
| LED Voltage | 12 or 24 Volts AC/DC |
| Plate Material | Stainless Steel |
| Depth Behind Plate | 1.25" |
| Compatibility | Standard 1-1/8" Mortise Cylinders |
| Security Features | Tamper-Proof and Slotted-Head Screws |
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