MS Sedco 830S Heavy Duty Keysw...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$68.00
$62.25
MS Sedco MS Sedco 830 Series Heavy Duty Keyswitches MSS-830S

MS Sedco 830S Heavy Duty Keyswitch for Automatic Doors with Maintained and Momentary Contact Options

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Model: 830-A

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

$68.00
$62.25
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MS Sedco 830S Heavy Duty Keyswitch for Automatic Doors with Maintained and Momentary Contact Options

The MS Sedco 830 Series Heavy Duty Keyswitch is a reliable and economical solution for momentarily activating or turning on and off low voltage electrical devices. Designed for use with automatic doors, the 830 Series allows operators and activation devices to be securely switched on and off using a standard 1-1/8" to 1-1/4" mortised cylinder. Available with a maintained contact switch (125 VAC, 6A) or a momentary contact switch (125 VAC, 3A), this UL Listed keyswitch is built for demanding commercial access control applications.

Key Features

  • Dual Contact Switch Options: Available with a maintained contact switch (125 VAC, 6A, red button) or a momentary contact switch (125 VAC, 3A, black button) to suit a variety of low voltage control applications.
  • Additional Switch Capability: An additional switch of either maintained or momentary type can be added for expanded control configurations.
  • Standard Cylinder Compatibility: Operates with a standard 1-1/8" to 1-1/4" mortised cylinder; mortised cylinders are available separately for flexible keying options.
  • Switch Activator Dead Stop: The heavy duty switch bracket features a switch activator dead stop that prevents the key cylinder from damaging a single switch, extending product service life.
  • Adjustable Mounting Holes: Adjustable mounting holes help "plumb and square" the keyswitch during installation for a clean, professional finish.
  • Versatile Mounting Compatibility: Fits single-gang and 2-gang electrical boxes, as well as MS Sedco #1015 or #1035 surface mount boxes for flexible installation options.
  • Choice of Stainless Steel Faceplates: Available with a choice of three different size stainless steel faceplates to match a variety of door and wall aesthetics.
  • Optional Enhancements: Optional LED indicators and radio control versions are available for added functionality and convenience.

Certifications & Compliance

  • UL Listed SPST Push Button Switch
  • Commercial Grade

Technical Specifications

  • Cylinder Compatibility: 1-1/8"-1-1/4" mortised cylinder with standard cam (purchased separately)
  • Faceplate Options: 3 stainless steel faceplate sizes available
  • Mounting: Single or 2-gang electrical box, or MS Sedco #1015/#1035 surface box (sold separately)
  • Relay Output: Maintained NO/COM (SPST), 125VAC, 6A
  • Status LEDs: Optional Red/Green
  • Operating Temperature: -40F to 185F (-40C to 85C)
  • Warranty: 3 years from date of purchase

Typical Applications

  • Automatic Door Operator Activation and Control
  • Commercial Office Building Entry Systems
  • Healthcare Facility Access Control
  • Educational Institution Door Management
  • Retail Establishment Automatic Door Systems
  • Industrial and Warehouse Facility Access Points
  • Government and Municipal Building Entry Control

Why MS Sedco 830 Series?

MS Sedco 830 Series keyswitches deliver professional-grade reliability with UL Listed SPST push button switches rated at 125 VAC and a heavy duty switch bracket featuring a switch activator dead stop to protect internal components. Engineered for demanding commercial access control environments, the 830 Series combines durable stainless steel faceplate options with flexible mounting and contact configurations to meet a wide range of automatic door and low voltage control requirements.

Product Specs

Product Group:
Electronic Access Controls
Product Subgroup:
Sensors, Switches, Relays and Timers
Product Type:
Keyswitches
Subcategory:
Keyswitches
Commercial/Residential:
Commercial
Electronic:
Yes
Series:
830 Series
Product Model:
830 Series
Product Finish:
Stainless Steel
Product Category:
Electronic Access Controls
Department:
Door Hardware

MS Sedco 830-A – Frequently Asked Questions

1) What cylinder does the MS Sedco 830S keyswitch take, and does it come with one?
The 830S takes a standard 1-1/8 inch to 1-1/4 inch mortise cylinder with a standard cam, and the cylinder is not included. You buy it separately, which is what lets you key the switch into whatever system already runs the building. Order the cylinder at the same time or the switch arrives unusable.
2) Maintained or momentary contact on an automatic door keyswitch, which one do I need?
Depends on what the key is supposed to do. Momentary contact (125 VAC, 3A, black button) pulses the operator, so turning the key cycles the door open once, like a key-activated push plate. Maintained contact (125 VAC, 6A, red button) latches on and stays on, so it turns an operator or activation device on and off, which is how you take an automatic entrance out of service after hours. The 830S is ordered as one or the other, so pick before you order.
3) What faceplate sizes does the MS Sedco 830S keyswitch come in?
Three stainless steel faceplates, all 4-1/2 inches on the long dimension: 1-11/16 x 4-1/2, 2-3/4 x 4-1/2, and 4-1/2 x 4-1/2 inches. The narrow 1-11/16 plate is the one that lands on a narrow stile or a jamb face; 2-3/4 x 4-1/2 covers a single-gang box and 4-1/2 x 4-1/2 covers a 2-gang. All three are offered with either the maintained or the momentary switch.
4) Will an MS Sedco 830 keyswitch mount to a standard electrical box, or do I need a surface box?
It mounts to a single-gang or 2-gang electrical box, so on new work you rough in a standard box and you are done. Where you cannot cut into the wall or you are mounting on a masonry or storefront surface, MS Sedco #1015 or #1035 surface mount boxes take it instead. Surface boxes are sold separately. Adjustable mounting holes let you plumb and square the plate once the box is in.
5) I need to key the door switch to the same key as the rest of the building. Can I do that with the 830S?
Yes, because the cylinder is not supplied with it. The 830S accepts any standard 1-1/8 inch to 1-1/4 inch mortise cylinder with a standard cam, so a locksmith supplies the cylinder in your keyway and keys it into the existing master system. That is the practical reason property managers pick a mortise cylinder switch over a proprietary one.
6) What is the equivalent to an MS Sedco 830S keyswitch if I need a mortise cylinder keyswitch from a different manufacturer?
The Securitron MK Standard Mortise Cylinder Keyswitch is the closest cross-brand equivalent. Both are mortise cylinder keyswitches for switching low voltage devices, and both take the cylinder separately so you can key them into an existing system. The MS Sedco 830S accepts a standard 1-1/8 inch to 1-1/4 inch mortised cylinder with a standard cam and is offered with either a maintained contact switch rated 125 VAC 6A or a momentary contact switch rated 125 VAC 3A, on a stainless steel faceplate in 1-11/16 x 4-1/2, 2-3/4 x 4-1/2, or 4-1/2 x 4-1/2 inch sizes. The Securitron MK is part of the MK Series. If the door operator needs a specific contact type, spec the 830S momentary for a pushbutton-style activation and the 830S maintained for on/off control of the operator.
7) I do not want to buy and key a mortise cylinder. Is there a simpler key switch for an automatic door?
Yes. The Alarm Controls Ace Terminal Key Switches in the KA Series use an ace tubular key barrel that comes with the switch, so there is no separate mortise cylinder to purchase or key. The MS Sedco 830S takes the opposite approach: it operates with a standard 1-1/8 inch to 1-1/4 inch mortised cylinder purchased separately, which is what lets you key the door operator into the same keyway as the rest of the building. Choose the Alarm Controls KA switch when the opening just needs a keyed control and nobody is standardizing the keying; choose the 830S when the facility keyway matters.
8) Can I get both an on/off function and a door-open pulse from one MS Sedco 830 keyswitch?
Yes. An additional switch, either maintained or momentary, can be added to the 830 Series, so one key cylinder can drive two circuits. That is how integrators get an after-hours on/off plus a momentary activation out of a single opening rather than running two boxes.
9) Can the 830S keyswitch be mounted outside in an unheated or exposed location?
Operating range on the 830 Series is -40F to 185F (-40C to 85C), which covers exterior vestibules, unheated warehouse entries, and northern climates without a heated enclosure. The faceplates are stainless steel.
10) Is the MS Sedco 830 keyswitch UL Listed?
The switch itself is a UL Listed SPST push button switch, rated 125 VAC. That is the rating a spec or a facility inspector asks about on the switch, and it is why the 830 Series shows up on healthcare, education, and government entrances.
11) How do I wire an 830S keyswitch to an automatic door operator?
The maintained version gives a dry NO/COM contact, SPST, rated 125 VAC at 6A. You land it on the operator's activation or on/off input, which is a low voltage circuit, and the contact simply closes when the key is turned. Because the rating is 125 VAC, the same switch handles line-voltage control of an accessory circuit if that is what the job calls for.
12) What other mortise cylinder keyswitches could I use instead of the MS Sedco 830S?
Two other brands sit in the same slot. The Securitron MK is a standard mortise cylinder keyswitch, so it is the closest like-for-like swap when you already run Securitron hardware. Alarm Controls KA Series switches are the other option. What separates the 830 Series is the three faceplate sizes, the choice of maintained or momentary contact at order time, and the ability to add a second switch behind one cylinder.
13) Will an Alarm Controls KA key switch drop into the same prep as an MS Sedco 830S?
Do not assume it will. The MS Sedco 830S mounts to a single-gang or 2-gang electrical box, or to an MS Sedco #1015 or #1035 surface mount box, and its stainless steel faceplate comes in 1-11/16 x 4-1/2, 2-3/4 x 4-1/2, and 4-1/2 x 4-1/2 inch sizes, so the plate you are replacing determines which one covers the existing opening. The Alarm Controls KA Series Ace Terminal Key Switches are a different product family with their own plate and barrel, so confirm the plate footprint and the box behind the wall before swapping one for the other. If you are matching an existing 830 Series installation across a set of doors, staying with the 830S faceplate size already in the wall is the clean swap.
14) My exterior automatic door entrance sees freezing winters. Which keyswitch holds up, the MS Sedco 830S or a Securitron MK?
The MS Sedco 830S carries a published operating temperature range of -40F to 185F (-40C to 85C) and a UL Listed SPST push button switch, with a heavy duty bracket and a switch activator dead stop that keeps the key cylinder from damaging the switch. That temperature range is the figure to hold a cold exterior entrance against. The Securitron MK Standard Mortise Cylinder Keyswitch in the MK Series is the comparable mortise cylinder switch to evaluate alongside it; check its rated range against your climate before specifying. Either way, on an exterior opening pair the switch with the surface mount box option rather than an in-wall gang box if the wall construction does not allow a clean recessed prep.
15) Can I get an indicator light on the keyswitch so staff can see whether the door is on?
Optional red/green LED indicators are available on the 830 Series, along with radio control versions. On an entrance that is switched on and off daily, the LED is what stops someone keying the switch twice because they could not tell the state.
16) Will a key cylinder damage the switch if someone overturns it?
No. The heavy duty switch bracket carries a switch activator dead stop that keeps the key cylinder from driving into a single switch. On a public entrance where the key gets turned hard several times a day, that is the part that decides service life.
How fast can I get the MS Sedco 830-A 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 MS Sedco 830-A come with a warranty?
Absolutely. The MS Sedco 830-A 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 MS Sedco 830-A?
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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