SDC MSB550 Series 36" Mechanic...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$261.00
$155.05
SDC MSB550 Series 36-inch Mechanical Switch Bar with Electromagnetic Lock Release, Dull Aluminum finish (628), front view

SDC MSB550 Series 36" Mechanical Switch Bar with Electromagnetic Lock Release

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Model: MSB550V36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$261.00
$155.05
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SDC MSB550 Series 36" Mechanical Switch Bar with Electromagnetic Lock Release

The SDC MSB550 Series 36" Mechanical Switch Bar releases electromagnetic locks on access-controlled doors with only 1/8" of total bar movement. Heavy-duty aluminum extrusion with metal end caps and an all-metal mounting assembly keeps operation quick and quiet. UL 294 and UL 1034 certified for commercial access control applications.

Features

  • Minimal Bar Movement: 1/8" total bar travel for fast, quiet EM lock release.
  • Heavy-Duty Construction: Aluminum extrusion body with metal end caps and all-metal mounting assembly resists sagging and warped-door malfunction.
  • Code-Compliant Egress: Meets building code requirements for egress through access-controlled doors without prior operational knowledge.
  • Low-Profile Design: 1-7/8" projection; fits narrow or wide stile doors.
  • Includes Power Transfer Loop: PT-2U power transfer loop included for simplified installation and troubleshooting.
  • UL Certified: UL 294 Access Control System Units and UL 1034 Burglary-Resistant Electric Locking Mechanisms.

Technical Specifications

  • Size: 36"
  • Projection: 1-7/8"
  • Bar Movement: 1/8" total
  • Construction: Heavy-duty aluminum extrusion, metal end caps, all-metal mounting assembly
  • Stile Compatibility: Narrow or Wide Stile
  • UL Certifications: UL 294, UL 1034
  • Fire Rating: No
  • Wood Door Compatible: No
  • Commercial/Residential: Commercial

Model Selection

  • MSB550: Single mechanical switch bar for standard EM lock release applications.
  • MSB550-2: Dual switch configuration for applications requiring a second switched output (e.g., alarm shunt or request-to-exit monitoring).
  • MSB550-2W: Dual switch, weatherized - specified for exterior or high-humidity door openings.

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:
36"
Fire Rating:
No
Product Projection:
1-7/8"
Product Category:
Exit Devices and Trim
Department:
Door Hardware

SDC MSB550V36 – Frequently Asked Questions

1) Do I need a separate power transfer to wire the SDC MSB550 switch bar?
No, a PT-2U power transfer loop ships with the bar. That carries the switch wiring from the frame into the door leaf and gives you a point to break the circuit when troubleshooting. You still supply the maglock, the power supply, and the access control side.
2) Does the SDC MSB550 satisfy egress requirements on a maglocked door?
The MSB550 is built for egress through access controlled openings without prior knowledge of how the door works, which is the reason a maglocked door gets a push bar at all. It carries UL 294 for access control system units and UL 1034 for burglary resistant electric locking mechanisms. Your local authority still dictates whether a switch bar alone satisfies the opening or whether additional release devices are required.
3) I need a push bar that also locks the door from the outside with a key. Is the MSB550 the right part?
No. The MSB550 has no latch, no cylinder, and takes no outside trim. Security comes entirely from the electromagnetic lock it releases. If you want mechanical locking with keyed outside access, look at a rim device that accepts trim, such as the Corbin Russwin ED4200 narrow stile or ED5200 wide stile, both 36 inch Grade 1 and both listed as exit only, accepts trim. For a night latch function specifically, the Sargent 8504 is a narrow stile rim device with that function.
4) What is the difference between the SDC MSB550 mechanical switch bar and a standard rim panic device like the TownSteel ED9700?
They do different jobs on the door. The SDC MSB550 is a 36 inch mechanical switch bar with a 1-7/8 inch projection that travels only 1/8 inch to signal release of an electromagnetic lock -- the bar is a switch, and the locking is done by the maglock it releases. The TownSteel ED9700 is a 36 inch Grade 1 heavy duty wide stile rim exit device, where the latching hardware is in the device itself and pushing the bar retracts a latch into a strike. If the opening is secured by a maglock on an access controlled door, the MSB550 is the release; if the opening needs a latching panic device, a rim device such as the ED9700 is the part.
5) The opening is a fire rated door -- can the SDC MSB550 switch bar be used?
No. The SDC MSB550 carries a fire rating of No. For a fire rated opening, use a fire rated exit device instead: the Adams Rite 3700 Series 30 inch is a fire rated Grade 1 narrow stile rim exit device, the Marks USA M9900F is offered fire rated in 36 inch and 48 inch exit only, the Orca Hardware OED85 Series is a fire rated 36 inch rim exit device, and the Dexter ED1000 Series is available as a Grade 1 fire rated rim exit device. Fire doors also cannot be held by a maglock arrangement in the way the MSB550 assumes.
6) The aluminum storefront has a narrow stile -- does the SDC MSB550 fit, or is a narrow stile exit device needed?
The SDC MSB550 is listed for narrow or wide stile applications and projects 1-7/8 inch, so a narrow stile aluminum door is within its range. Narrow stile rim exit devices that latch mechanically are a separate family: the Adams Rite 8800 Series 30 inch, the Corbin Russwin ED4200 36 inch Grade 1, the TownSteel ED3700 and ED8900 36 inch Grade 1, the Falcon 19-R 36 inch Grade 1 exit only, and the Detex 40 Advantex extra heavy duty Grade 1. Choose by whether the door is held by a maglock or needs its own latch.
7) What is the closest cross-brand equivalent to the SDC MSB550 switch bar?
The Securitron EMB Electromechanical Exit Bar is the nearest peer in function -- like the SDC MSB550, it is an exit bar whose push action works electrically rather than through a mechanical latch and strike. The Securitron EMB is listed for a 2-1/4 inch door thickness. The SDC MSB550 comes in a 36 inch length with a 1-7/8 inch projection and is offered as MSB550 single switch, MSB550-2 dual switch, and MSB550-2W weatherized dual switch, so if the job needs two independent switch outputs or an exterior opening, that choice sits on the SDC side.
8) The door is wood -- what should be specified instead of the SDC MSB550?
The SDC MSB550 is not wood door compatible. Among rim exit devices, the Adams Rite 3700 Series 30 inch fire rated narrow stile device and the Adams Rite 8700 Series 30 inch narrow stile device are both listed as wood door compatible, and both are Grade 1. Most other rim devices in the class, including the Corbin Russwin ED5200 and the TownSteel ED1100, are not wood door compatible, so the Adams Rite pair is where to look for a wood opening.
9) Which exit device should be used when access control needs to release the latch rather than a maglock?
The SDC MSB550 switch bar signals release of an electromagnetic lock and includes a PT-2U power transfer loop. Where the opening instead needs an electrified latching device, the Dormakaba Electrified Rim 36 inch exit device with 4908A trim is built for that with an 08 classroom function, and the Sargent 12-8810-LTRIM wide stile Grade 1 fire rated device is offered with RX and MELR. Those retract or monitor a latch in the device; the MSB550 controls power to a separate lock.
10) What door width does the 36 inch SDC MSB550 switch bar cover?
It is built as a 36 inch bar, so it suits a standard 3 foot leaf. The bar length is fixed on this one, not field cut, so size it to the door opening you are covering rather than trimming on site.
11) We have a sagging exterior door and the old push bar keeps failing. Will the MSB550 hold up?
That is the case it is built for. The bar is aluminum extrusion with metal end caps and an all metal mounting assembly, specifically so a sagged or warped door does not throw the switch out of alignment. Total travel is only 1/8 inch, so there is very little mechanism to bind. For an exterior opening take the MSB550-2W, the weatherized version.
12) Is the Securitron EMB a substitute for the SDC MSB550?
They serve the same job, an electrified exit bar that releases the lock rather than latching the door, so the Securitron EMB is the closest cross-brand equivalent we carry. The EMB is listed for 2-1/4 inch door thickness. The MSB550 differs in that it comes as a single switch, dual switch, or weatherized dual switch, so if you need a second contact for the access control panel or an exterior rated bar, that choice sits on the SDC side.
13) Can I use the SDC MSB550 on a pair of doors with no mullion?
Each MSB550 is a 36 inch switch bar for one leaf, so a pair takes one bar per active leaf, each wired to release its own maglock. There is no vertical rod and nothing latches at the head or the threshold. If the pair has to mechanically latch without a mullion, a switch bar is the wrong approach and you want a vertical rod device such as the Hager 4501 concealed vertical rod for wide stile or the Hager 4601 for narrow stile.
14) Is there an alternative to the SDC MSB550 that carries an ANSI/BHMA Grade 1 rating for a facility standard?
If a specification calls out ANSI/BHMA Grade 1 exit hardware, that rating belongs to latching rim exit devices rather than to a switch bar. Grade 1 rim devices at the same 36 inch door width include the TownSteel ED9700 wide stile heavy duty, the TownSteel ED8900 and ED3700 narrow stile heavy duty, the Corbin Russwin ED5200 wide stile and ED4200 narrow stile, the Hager 4701 Series, and the Imperial USA ED-501 wide stile. The SDC MSB550 answers a different requirement -- it is the UL 294 and UL 1034 certified release for an electromagnetically locked access controlled opening.
15) The opening is a pair of doors wider than 36 inches -- what covers that instead of the SDC MSB550 36 inch bar?
The SDC MSB550 covered here is the 36 inch size. For wider single leaves, 48 inch rim devices in the set include the Cal-Royal 5500 with push bar Grade 2 heavy duty, the Cal-Royal A9820 exit only heavy duty, the Corbin Russwin ED3200 Grade 1 crossbar for 1-3/4 inch doors, the DORMA 9300 Series wide stile Grade 1 exit only, the CRL Jackson 1095 Series crossbar, the Marks USA M9900F fire rated exit only, and the Dexter ED1000 Series 4FT Grade 1.
16) Is a crossbar or paddle panic device an acceptable substitute for the SDC MSB550 switch bar?
They are not interchangeable. Crossbar and paddle devices such as the CRL Jackson 1095 Series 48 inch crossbar, the CRL Jackson 1095P paddle, the Corbin Russwin ED3200 Grade 1 crossbar, and the Sargent 3828 Grade 1 reversible standard push bar are exit only mechanical devices that retract a latch. The SDC MSB550 has only 1/8 inch of total bar travel because it actuates a switch, not a latch, and it releases an electromagnetic lock on an access controlled opening. Substituting one for the other changes how the door is secured, not just how it looks.
17) Which option should be specified for an exterior door exposed to weather, and what is the alternative if a mechanical device is preferred?
The SDC MSB550-2W is the weatherized dual switch model and is offered in 629 bright stainless, 630 satin stainless steel, 628 dull aluminum, and 335 dull black. If the exterior opening is to be secured mechanically instead of by an electromagnetic lock, a rim exit device such as the Detex 10 Advantex 36 inch wide stile extra heavy duty Grade 1 or the Detex 40 Advantex narrow stile extra heavy duty Grade 1 covers demanding traffic on aluminum or hollow metal doors.
18) What is a simpler exit-only device for a door that does not need access control at all?
Where the opening simply needs code compliant egress with no electrified release, exit only rim devices cover it: the Orca Hardware OED55 Series 36 inch, the Marks USA M9900 36 inch with panic protector end cap, the Arrow ED910 36 inch for 1-3/4 inch doors, the Dexter ED1000 Series 3FT Grade 1, and the Design Hardware 2000R 33 inch standard duty wide stile with hex key dogging. The SDC MSB550 is the choice only when a maglock or other electromagnetic lock has to be released on push.
19) What finishes does the SDC MSB550 come in and do they cover exterior doors?
Four: 628 dull aluminum, 629 bright stainless, 630 satin stainless, and 335 dull black. The weatherized MSB550-2W is offered in all four, so an exterior door can still be matched to the rest of the storefront. Dull aluminum is the common match for clear anodized aluminum entrances.
20) For a facility standardizing hardware, does specifying the SDC MSB550 rule out matching the rest of the doors?
The SDC MSB550 is offered in 628 dull aluminum, 629 bright stainless, 630 satin stainless steel, and 335 dull black across all three models, which covers the common architectural finishes on aluminum and stainless openings. Doors in the same facility that need latching hardware rather than maglock release can be standardized on a single Grade 1 rim family -- for example the TownSteel 9700 Series wide stile and 8900 Series narrow stile, or the Corbin Russwin ED5000 wide stile and ED4000 narrow stile series -- so both stile conditions stay within one manufacturer.
21) Is the SDC MSB550 rated for residential use or is it commercial only?
Commercial. It is specified for access controlled openings in commercial buildings, schools, healthcare, retail, industrial and government facilities, and multi-tenant residential common areas rather than individual dwelling units.
How fast can I get the SDC MSB550V36 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 MSB550V36 come with a warranty?
Absolutely. The SDC MSB550V36 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 MSB550V36?
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