Name: SDC MC-4MU Recessed Magnetic Door Position Sensor with 1-1/4" x 4-7/8" Mounting Plate
Brand: SDC
SKU: MC-4MU
Price: 83.83 USD
Availability: InStock

Product Overview
FAQs

SDC MC-4MU Recessed Magnetic Door Position Sensor with 1-1/4"; x 4-7/8"; Mounting Plate

Professional Door Position Monitoring Solution

The SDC MC-4MU is a recessed magnetic door position sensor designed for commercial access control applications. This professional-grade sensor features a compact 1-1/4"; by 4-7/8"; mounting plate configuration for discreet installation in door frames. Part of SDC's comprehensive exit switches and sensors product line, the MC-4MU provides reliable door position monitoring for request-to-exit applications and security system integration.

Professional Features & Benefits

Compact Mounting Dimensions: 1-1/4"; by 4-7/8"; plate design allows for discreet recessed installation in standard door frame preparations.
Magnetic Sensing Technology: Non-contact magnetic operation provides reliable door position detection without mechanical wear components.
Recessed Design: Low-profile installation minimizes visual impact while protecting sensor components from damage and tampering.
Commercial-Grade Construction: Engineered for demanding commercial access control applications with durable materials and reliable performance.
Versatile Integration: Compatible with various request-to-exit configurations and access control systems for flexible application options.
Professional Installation: Standardized mounting plate dimensions simplify installation and ensure consistent positioning across multiple openings.

Technical Specifications

Commercial/Residential: Commercial
Department: Door Hardware
Electronic: Yes
Product Category: Electronic Access Control
Product Group: Electronic Access Controls
Product Subgroup: Part and Accessories
Product Type: Door Position Sensor
Series: MC-4MU
Subcategory: Part and Accessories

Professional Applications

Commercial Building Security Systems
Retail Loss Prevention
Healthcare Facility Access Control
Educational Institution Safety Systems
Industrial Facility Monitoring
Emergency Exit Compliance
Government and Municipal Buildings

Why Choose SDC Quality?

SDC door position sensors deliver professional-grade reliability with magnetic sensing technology designed for commercial access control applications. Engineered as part of a comprehensive exit switches and sensors product line, the MC-4MU provides dependable door position monitoring for demanding commercial environments where accurate security system integration is essential.

Manufacturer Resources

SDC Full Catalog

Product Specs

Subcategory:: Part and Accessories
Series:: MC-4MU
Commercial/Residential:: Commercial
Electronic:: Yes
Product Type:: Door Position Sensors
Product Group:: Electronic Access Controls
Product Subgroup:: Parts and Accessories
Product Category:: Electronic Access Control
Department:: Door Hardware

SDC MC-4MU – Frequently Asked Questions

1) SDC MC-4MU door position sensor: should I order the SPDT or the DPDT version?

Order by how many separate circuits the door status has to feed. The MC-4MU comes in SPDT and DPDT relay configurations. SPDT gives you one set of changeover contacts, so it's the one to pick when door position reports to a single destination, typically the access control panel input or the alarm zone. DPDT gives two independent sets of changeover contacts switching together, so one set can report to the access panel while the second drives something else off the same door, an alarm point, a monitoring relay, or an annunciator, without T-tapping one contact into two systems. If you're standardizing a run of openings and any of them may later need a second output, the DPDT costs you nothing in the prep since the sensor body and plate are the same.

2) Does the SDC MC-4MU magnetic door position sensor mount on the surface of the frame or recess into it?

It recesses. The MC-4MU is a recessed sensor mounted on a 1-1/4 by 4-7/8 inch plate, so the frame gets a mortise prep and the plate sits flush against the face, with the mating half prepped into the door edge opposite it. Budget that prep into the opening before you order: if you're monitoring an existing hollow metal frame you can't cut into, or a glass or aluminum condition with no room in the stop, a recessed sensor is the wrong choice and you want a surface mounted contact instead. On new frames or anywhere the prep can be done, the recessed version is what you want for concealment and for keeping the sensor out of reach of tampering and door traffic.

3) Will an SDC MC-4MU magnetic contact work with my access control panel or alarm system?

Yes, the MC-4MU reports door position through relay contacts rather than any proprietary signal, and it's offered in SPDT and DPDT configurations. Dry changeover contacts are what virtually every access control panel, alarm zone input, and monitoring board expects on a door position input, so the sensor wires to whatever supervises the opening rather than being tied to one manufacturer's system. It's used for door position monitoring and request to exit integration on commercial openings. Verify your panel's input expectation, normally open or normally closed, and land the contact leg accordingly, since a changeover contact gives you both.

4) What size is the frame cutout for the SDC MC-4MU door position sensor?

The MC-4MU sensor sits on a 1-1/4 by 4-7/8 inch plate, and that plate footprint is what the frame face has to accept. It's a long, narrow profile, which matters on a stop that's already carrying other hardware, check that you have a clear 4-7/8 inches of run in the stop at the sensor location with nothing conflicting, particularly if there's an electric strike or a closer arm prep nearby in the same head or jamb. Across multiple openings the fixed plate size is the useful part: the prep is identical every time, so a run of doors monitors consistently without each frame being measured on its own.

5) Is a magnetic door position sensor like the SDC MC-4MU better than a mechanical door switch?

For a door that cycles constantly, magnetic wins. The MC-4MU senses position magnetically with no contact between the two halves, so there's no plunger or roller being hammered every time the door closes and nothing that wears out of adjustment as the door settles on its hinges. A mechanical plunger switch depends on the door striking it at a consistent depth, which drifts as hinges sag or the closer gets adjusted, and it starts producing false door-open reports. That drift is the usual reason a monitored opening gets a nuisance alarm history. The trade-off is the prep: the magnetic sensor needs both halves aligned across the gap, so a door with a badly warped leaf or an oversized gap needs the alignment confirmed at install.

6) Is the SDC MC-4MU rated for commercial door traffic or is it a residential product?

Commercial. The MC-4MU is built for commercial access control work, and it's the type of door monitoring used on building security systems, healthcare and school openings, retail, and government facilities. For a property manager standardizing across a portfolio, that means the same part number and the same frame prep works on a stairwell door, a tenant entry, or a back-of-house service door, and the SPDT or DPDT choice is the only decision that changes opening to opening. It's an electronic component, so every opening it goes on needs the monitoring wiring run back to the panel.

How fast can I get the SDC MC-4MU delivered?

Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.

Can I return it if it doesn’t work for me?

Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.

Does the SDC MC-4MU come with a warranty?

Absolutely. The SDC MC-4MU is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.

How do I get technical support or installation help for the SDC MC-4MU?

You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us

Why buy the SDC MC-4MU from ZenSupply?

ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.

SDC MC-4MU Recessed Magnetic Door Position Sensor with 1-1/4" x 4-7/8" Mounting Plate

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