Fail-Safe vs Fail-Secure Locks: What Every Facility Manager Needs to Know Before Buying

Here's something that trips up even experienced contractors. You're speccing out an access control project, the architect hands you a door schedule, and right next to the lock column it says "fail-secure." Or maybe it says "fail-safe." And you think you know the difference... but do you really?

After 24 years of selling electrified commercial door hardware to locksmiths, contractors, and facility managers across the US, we can tell you this: the fail-safe vs fail-secure question is the single most common point of confusion in access control hardware. Get it wrong, and you've got a fire code violation on your hands. Or worse, a door that won't secure properly during a power outage.

Let's clear it up once and for all.

What Does Fail-Safe Actually Mean?

A fail-safe lock unlocks when power is cut. Think of it this way. "Safe" refers to the safety of the people inside the building. If the power goes out, the lock releases so people can get out freely.

This makes fail-safe hardware the go-to choice for doors on fire-rated egress paths. When a fire alarm triggers or the building loses power, you don't want people trapped behind a locked door. The lock opens, the people exit. That's the whole point.

Common fail-safe products include electromagnetic locks (maglocks), certain electric strikes, and specific models of electrified mortise locks and electrified cylindrical locks.

Maglocks are the most obvious example. They need constant power to hold the door shut. The moment power drops, the magnetic field disappears and the door swings open. It's simple physics, and it's also why most fire codes allow maglocks on egress paths only with specific safeguards in place.

What Does Fail-Secure Mean?

A fail-secure lock stays locked when power is cut. Here, "secure" refers to the security of the building. If power goes out, the lock keeps the door secured from the outside, protecting whatever is on the other side.

But here's the critical part that gets missed. A fail-secure lock still allows free egress from the inside. You can always get out. The "locked" part only applies to the outside. Someone trying to enter from the corridor or exterior side won't be able to get in without a key or credential.

Fail-secure locks are common in storerooms, server rooms, pharmacies, and other spaces where maintaining security is more important than remote release capability. Products like the Corbin Russwin ML20906, Sargent 8271, and Schlage L9092 are among the most popular fail-secure electrified mortise locks we ship.

How to Decide: Fail-Safe or Fail-Secure?

The decision isn't about preference. It's driven by building codes, the door's location, and what's on the other side of it. Here's a practical breakdown that works in the real world.

Choose fail-safe when:

• The door is on a required fire egress path
• Building codes or the AHJ (Authority Having Jurisdiction) require it
• The door serves an area where people could be trapped during power failure
• You're using maglocks or electric strikes on exterior doors controlled by access readers

Choose fail-secure when:

• The door protects high-value assets (data centers, pharmacies, evidence rooms)
• Security during power loss is the primary concern
• The inside lever always allows free exit regardless of power status
• The door doesn't serve as a primary fire egress point

A real-world example. A hospital's main corridor doors? Fail-safe. The pharmacy inside that hospital? Fail-secure. The loading dock? Fail-safe. The IT server room? Fail-secure. Context determines everything.

What the Fire Code Actually Says

This is where it gets serious. The IBC (International Building Code) and NFPA 101 (Life Safety Code) both have clear requirements around electrified hardware on egress doors.

For doors in assembly occupancies (Group A) and educational occupancies (Group E) with an occupant load of 50 or more, latching hardware must be panic hardware or fire exit hardware. When you add electrification to these devices, you've got to think carefully about what happens during power loss.

Maglocks on egress doors require specific safeguards under IBC Section 1010.2.11 (2024 edition; this was numbered 1010.2.12 in the 2021 IBC, so check which edition your jurisdiction has adopted). The building must have an approved automatic sprinkler system, fire detection system, and the maglock must release on fire alarm activation, power failure, and sensor activation at the door. Also worth knowing: the 2024 IBC now prohibits sensor-release electromagnetic locking systems on doors that are required to have panic hardware. Those doors need a door hardware release system (like an RX switch in the panic device) instead.

If you're working on a project with fire-rated doors, the electrified hardware must be listed as fire exit hardware, not just standard panic hardware. Products like the BEST 45HW series and Falcon T881 are available in fire-rated configurations for exactly this purpose.

The bottom line? Always confirm with your local AHJ. Code requirements vary by jurisdiction, and some local amendments are more restrictive than the model codes.

Electrified Lock Types at a Glance

Not all electrified locks are created equal. Here's a quick rundown of the main types and when each makes sense.

Electrified Mortise Locks are the heavy hitters. Built into a pocket in the door edge, these Grade 1 locks handle the most demanding commercial applications. Schools, hospitals, government buildings. They offer the widest range of functions, and most can be ordered as fail-safe or fail-secure depending on the model. Browse the full selection of electrified mortise locks we carry from Schlage, Sargent, Corbin Russwin, BEST, and Falcon.

Electrified Cylindrical Locks install through a standard bore hole, making them easier to retrofit. They don't offer quite the same durability as mortise locks, but for medium-security applications they're a solid choice at a lower price point. See our electrified cylindrical locks collection.

Electric Strikes replace the standard strike plate in the door frame. When energized (or de-energized, depending on configuration), the strike releases its keeper and lets the door open without retracting the latch. HES, Von Duprin, and RCI are the dominant brands in this space.

Electromagnetic Locks (Maglocks) use a powerful electromagnet to hold the door. Always fail-safe by design. Available in 300 lb, 600 lb, and 1,200 lb holding force ratings from brands like Securitron, Alarm Controls, and SDC.

Electrified Exit Devices are panic bars with built-in electrification. Latch retraction, dogging, or monitoring can be controlled remotely. Essential for high-security egress doors in schools and government facilities. Check out electrified panic devices from Von Duprin, Sargent, and Falcon.

Common Mistakes We See on Job Sites

We've talked to thousands of contractors and locksmiths over the past two decades. Here are the mistakes that keep coming up.

Putting fail-safe hardware where fail-secure is needed. A storeroom door that unlocks during every power blip is a security nightmare. If the space behind the door needs to stay locked during outages, fail-secure is the only option.

Using maglocks without proper egress release. Maglocks on egress doors need a request-to-exit sensor (motion sensor or push button) plus fire alarm release and power failure release. Skipping any of these creates a code violation.

Mixing up electric strikes and maglocks in the spec. They solve different problems. Electric strikes work with existing locksets and maintain latch security. Maglocks provide holding force but require a separate closer and no mechanical latch. They're not interchangeable.

Forgetting about power supplies. Every electrified lock needs clean, reliable power. An undersized or unprotected power supply causes intermittent lock failures that are incredibly frustrating to troubleshoot. Altronix and Securitron both make excellent access control power supplies designed for this exact purpose.

How to Read an Electrified Lock Model Number

Manufacturers encode the fail-safe or fail-secure configuration right into the model number, but it's not always obvious. Here are the patterns for the most popular brands.

For Schlage L-Series electrified mortise locks, the model number tells you the function. The L9092 electrically locks and unlocks the outside lever. The L9095 controls both levers. Now here's the part that trips people up. The "EL" suffix means Electrically Locked, which is actually fail-safe. Power holds the lock engaged, so when power drops the lever unlocks. The "EU" suffix means Electrically Unlocked, which is fail-secure. Power holds the lever in the unlocked position, so when power drops it locks. Backwards from what you'd guess, right? Schlage makes them field-selectable between EL and EU by flipping a switch on the lock case.

For Corbin Russwin ML2000 series, the ML20906 with "SEC" suffix means fail-secure. Same lock with "SAF" would be fail-safe.

For Sargent 8200 series, the 8271 is the electromechanical fail-secure model. The 8270 would be the fail-safe counterpart.

Not sure which configuration you need? Call us at 877-471-4870. We've been matching contractors with the right electrified hardware since 2001, and we'll walk you through the model numbers until it clicks.

Why Facility Managers Trust American Locksets for Electrified Hardware

We get it. Electrified locks aren't cheap, and the last thing you need is to order the wrong one and eat a restocking fee. Here's why thousands of commercial buyers come back to us.

We've been in this business since 2001. That's not a marketing line. It's 24 years of answering phone calls from contractors standing at job sites, helping them figure out the right lock for the right door. We carry every major brand, including Schlage, Sargent, Corbin Russwin, BEST, Falcon, Von Duprin, and more. Most electrified locks ship same day if they're in stock, and we offer free shipping on orders over $300.

Need a door schedule quoted? Send it to sales@locksearch.com or use our quote request form. We'll match every opening with the right hardware and get you competitive pricing on the whole package.