SDC MSB550 Series 42" Mechanic...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$297.00
$208.70
SDC MSB550 Series - 42" Mechanical Switch Bars

SDC MSB550 Series 42" Mechanical Switch Bar with Electromagnetic Lock Release

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Model: MSB550-2V42
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$297.00
$208.70
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SDC MSB550 Series 42"; Mechanical Switch Bar with Electromagnetic Lock Release

Professional Electromagnetic Lock Release Solution for Access-Controlled Doors

The SDC MSB550 Series 42"; Mechanical Switch Bar provides reliable electromagnetic lock release for commercial access control applications. Featuring heavy duty aluminum extrusion construction with metal caps and all-metal mounting assembly, this switch bar delivers quick and quiet operation with only 1/8"; total bar movement. UL 294 and UL 1034 certified for access control and burglary-resistant applications, the MSB550 meets building code requirements for uninhibited egress through access-controlled doors.

Professional Features & Benefits

  • Minimal Bar Movement: Only 1/8"; total bar movement ensures quick and quiet electromagnetic lock release activation.
  • Heavy-Duty Construction: Aluminum extrusion with metal end caps and all-metal mounting assembly prevents malfunction due to sagging or warped doors.
  • Code Compliance Design: Meets building code requirements for egress through access-controlled doors without prior operational knowledge.
  • High Traffic Durability: Engineered for high traffic commercial use with rigid construction that resists door and stile movement.
  • Low-Profile Installation: Narrow, low-profile design minimizes visual impact while providing reliable operation.
  • Complete Power Transfer: Includes PT-2U power transfer loop for simplified wiring and installation.
  • Multiple Model Options: Available as MSB550 single switch, MSB550-2 dual switch, and MSB550-2W weatherized dual switch configurations.
  • UL Certifications: UL 294 Access Control System Units and UL 1034 Burglary-Resistant Electric Locking Mechanisms certified with CSFM listing.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Fire Rating: No
  • PDF:SDC Full Catalog: https://zensupply.com/content/pdf/lcn/CondensedHardwareBrochure
  • Product Category: Exit Devices and Trim
  • Product Group: Exit Devices and Trim
  • Product Model: MSB550, MSB550-2, MSB550-2W
  • Product Projection: 1-7/8";
  • Product Size: 42";
  • Product Subgroup: Exit Devices - Rim
  • Product Type: Exit Devices - Rim
  • Series: MSB550 Series
  • Stile Type: Narrow or Wide Stile
  • Subcategory: Rim Exit Devices
  • Wood Door Compatible: No

Professional Applications

  • Commercial Office Building Access Control
  • Educational Facility Security Systems
  • Healthcare Institution Controlled Access
  • Retail Store Loss Prevention
  • Industrial Facility Entry Points
  • Government Building Security
  • Multi-Tenant Residential Access Control

Why Choose SDC Quality?

SDC MSB550 Series switch bars deliver professional-grade reliability with heavy duty aluminum construction and all-metal components designed for high traffic commercial applications. UL 294 and UL 1034 certifications ensure compliance with access control and security standards. The rigid construction and minimal 1/8"; bar movement provide dependable electromagnetic lock release where consistent egress performance is essential.

Manufacturer Resources

SDC Full Catalog

Product Specs

Series:
MSB550 Series
Product Group:
Exit Devices and Trim
Product Subgroup:
Exit Devices - Rim
Product Type:
Exit Devices - Rim
Subcategory:
Rim Exit Devices
Commercial/Residential:
Commercial
Stile Type:
Narrow or Wide Stile
Wood Door Compatible:
No
Product Model:
MSB550, MSB550-2, MSB550-2W
Product Size:
42"
Fire Rating:
No
Product Projection:
1-7/8"
Product Category:
Exit Devices and Trim
Department:
Door Hardware

SDC MSB550-2V42 – Frequently Asked Questions

1) Does the SDC MSB550 switch bar actually latch the door, or do I still need a lock?
The MSB550 is a switch bar, not a latching exit device. It has no latchbolt. Pressing the bar (only 1/8 inch of total travel) throws a mechanical switch that releases a separate electromagnetic lock holding the door. You still need the maglock, its power supply, and a strike-free frame prep. If you want a device that mechanically latches the door on its own, that is a rim exit device such as the Corbin Russwin ED5200 or the TownSteel ED9700.
2) Will a 42 inch switch bar fit my aluminum storefront stile?
Yes on stile width. The MSB550 mounts on either narrow or wide stile doors, so an aluminum storefront stile is within range. The two numbers to check are the 42 inch bar length against your door width, and the 1-7/8 inch projection off the face of the door, which is what determines clearance to a return wall, side light, or a second leaf swinging past.
3) Does the MSB550 meet egress code on an access controlled door?
That is what it is built for. The bar releases the maglock on a single push with no prior knowledge of operation required, which is the egress requirement on access controlled openings. It carries UL 294 for access control system units and UL 1034 for burglary-resistant electric locking mechanisms, plus a CSFM listing. It is a commercial-duty product, not residential.
4) The opening needs a fire-rated exit device. What should I use instead of the SDC MSB550?
The MSB550 is not fire rated, so a fire-rated opening needs a different device. Fire-rated rim options include the Adams Rite 3700 Series 30 inch narrow stile Grade 1 device, the Marks USA M9900F in 36 inch and 48 inch, the Arrow FS1250 32 inch, the Orca OED85 36 inch, and the Dexter ED1000-R-F-EO Grade 1. Sargent also lists the 12-8810-LTRIM fire-rated wide stile rim device with RX and MELR if electrified monitoring is part of the spec.
5) What is the closest alternative to the SDC MSB550 switch bar if I need an electrified exit bar that releases a maglock?
The Securitron EMB Electromechanical Exit Bar is the nearest peer in concept - it is an exit bar built around electrical switching rather than a mechanical latch, and it lists a 2-1/4 inch door thickness. The SDC MSB550 differs in that it is a switch bar with only 1/8 inch total bar movement driving electromagnetic lock release, offered as MSB550, MSB550-2 dual switch, and MSB550-2W weatherized, at 42 inches with a 1-7/8 inch projection.
6) I need a real latching rim exit device at 42 inches, not a switch bar. What matches that length?
The MSB550 is a 42 inch switch bar that signals an electromagnetic lock rather than throwing its own latch. For a latching rim device at the same 42 inch length, Falcon lists the 1590EO narrow stile Grade 1 exit-only device at 42 inches and the 1790EO narrow stile Grade 1 exit-only device at 42 inches, both for 1-3/4 inch doors.
7) Does the MSB550 come with the power transfer, or do I order that separately?
The PT-2U power transfer loop ships with the bar, so the wiring path from frame to door is covered. What is not included is the electromagnetic lock itself, the power supply, and any access control reader or release device on the secure side.
8) Will the MSB550 still work on a door that has sagged or warped?
That is one of the reasons to pick it over a latching device on a problem opening. The bar is aluminum extrusion with metal end caps and an all-metal mounting assembly, and because release is by switch rather than by a latch engaging a strike, there is no latch-to-strike alignment to lose when a door sags or a stile flexes. A rim exit device on the same door would bind or fail to latch.
9) Can I put the SDC MSB550 on a wood door, and what do I use if the door is wood?
The MSB550 is not rated for wood doors, though it does cover both narrow and wide stile metal and glass applications. For wood doors, the Adams Rite 8700 Series 30 inch narrow stile Grade 1 rim device and the Adams Rite 3700 Series 30 inch fire-rated narrow stile Grade 1 device both list wood door compatibility.
10) What should I specify instead of the SDC MSB550 if the opening needs exterior keyed entry through the device?
The MSB550 is a switch bar that releases an electromagnetic lock and does not carry its own latch or cylinder. Where the spec calls for trim or keyed outside access, the Corbin Russwin ED4200 Grade 1 36 inch narrow stile and ED5200 Grade 1 36 inch wide stile devices both list exit only plus accepts trim, and the Sargent 8504 is a narrow stile rim device in night latch function.
11) Is a Detex Advantex or TownSteel rim device a substitute for the SDC MSB550?
They solve different problems. The Detex 40 Advantex is a Grade 1 extra heavy duty narrow stile rim exit device and the TownSteel ED3700 is a Grade 1 heavy duty narrow stile rim device at 36 inches - both are mechanical latching devices that secure the door themselves. The MSB550 is a 42 inch switch bar whose job is to release an electromagnetic lock through a mechanical switch with 1/8 inch travel, and it ships with a PT-2U power transfer loop for the wiring. If the opening is held by a maglock on an access control system, the Detex and TownSteel devices will not do that work.
12) What finishes does the SDC MSB550 switch bar come in?
Four: 628 dull aluminum, 629 bright stainless, 630 satin stainless steel, and 335 dull black. All four are offered across the single switch MSB550, the dual switch MSB550-2, and the weatherized MSB550-2W, so you can standardize a building on one finish regardless of which switch build each opening needs.
13) The MSB550-2W is weatherized. If I am not buying SDC, what rim devices in the set suit a wider or thicker exterior door?
Within SDC, the weatherized option is the MSB550-2W dual switch bar, offered in 629 bright stainless, 630 satin stainless, 628 dull aluminum, and 335 dull black. If the substitute has to be a mechanical latching device on a thicker door, the Adams Rite 8800 Series and the DORMA 9300A both list a 1-3/4 inch to 2-1/4 inch door thickness range, and the Securitron EMB lists 2-1/4 inch.
14) Is there a simpler non-electrified option than the SDC MSB550 for a 48 inch pair of doors?
If the opening does not need access control signaling, several purely mechanical 48 inch rim devices exist: the CRL Jackson 1095 Series 48 inch crossbar wide stile exit only device, the Cal-Royal 5500 48 inch push bar Grade 2 device, and the Corbin Russwin ED3200 Grade 1 48 inch wide stile crossbar device for 1-3/4 inch doors. The MSB550 by contrast is a 42 inch bar built to drive an electromagnetic lock release.
How fast can I get the SDC MSB550-2V42 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 MSB550-2V42 come with a warranty?
Absolutely. The SDC MSB550-2V42 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 MSB550-2V42?
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
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