Sargent 8272 Electromechanical Mortise Lock - Fail safe - Body Only

The Sargent 8272 is the fail safe electromechanical function in the 8200 Series mortise lock: when the access control system applies power, both levers lock. When power is removed for any reason, including a fire alarm activation, building emergency, or power fault, both levers unlock immediately. People can enter and exit freely without keys or electronics. This is the function used for fire-rated egress doors, hospital corridor openings, government building emergency exits, and any application where local code or the AHJ requires free egress during power interruption.

This listing is the body-only configuration. The lock body includes the outside front plate, strike, and screwpack. Cylinder and trim are not included and must be ordered separately. For the complete Sargent 8200 Body Only lineup, browse all body-only configurations. For all commercial mortise locks across every brand, view our full catalog.

How the 8272 Fail Safe Double Cylinder Function Works

Power ON (access control signal active): both the outside lever and inside lever lock. Entry and exit require either the access control signal to be removed, or mechanical key operation via the cylinder. Power OFF or power failure: both levers unlock automatically. The door operates freely from both sides with no key required. Mechanical key cylinders on both the outside and inside positions provide override capability at any time regardless of electrical state.

The double cylinder design means the lock body is prepped for a cylinder on both the inside and outside positions, which is appropriate for high-security applications where key control over both-direction entry and exit is required even when the electrical system is active.

This function is the electrical opposite of the 8271 (fail secure), where the outside lever stays locked when power fails. The choice between 8272 fail safe and 8271 fail secure is determined by life safety code requirements for the specific opening and must be confirmed with the Authority Having Jurisdiction before specifying. For a full explanation of every 8200 Series function, read the Sargent 8200 Series mortise lock guide.

Sargent 8272 Technical Specifications

Series: Sargent 8200 Electromechanical Mortise Lock. Function: 72, Fail Safe, Double Cylinder. Body configuration: Body Only (outside front, strike, screwpack included; cylinder and trim not included). ANSI/BHMA standard: A156.13, Grade 1. UL Listed: yes, fire-rated doors. Voltage: 12V DC or 24V DC (specify at time of order). Ecoflex technology: yes, up to 92% energy savings versus continuous power solenoid systems. Field changeable: yes, between fail safe and fail secure without replacing the lock body. Standalone applications: yes. Access control integration: yes. Case: 12 gauge heavy duty wrought steel, zinc dichromate plated, 7/64" (3mm) (.109") thick. Outside front plate: brass, bronze, or stainless steel. Backset: 2-3/4". Door thickness: 1-3/4" (44mm) standard (specify for thicker doors). Door prep: ANSI A115.1 modified per 7800/8200 Series template. RX option: Request-to-Exit switch available (two internal switches monitor inside and outside lever rotation independently). Warranty: 10-year limited on lock body, 2-year limited on electrified components. Available finishes: 26D Satin Chrome, 26 Bright Chrome, 10 Satin Bronze, 4 Satin Brass, 3 Bright Brass, 10B Oil Rubbed Bronze.

Ecoflex Technology and Field Changeability

The 8272 uses Sargent's Ecoflex technology, which reduces power consumption by up to 92% compared to continuous solenoid systems. This matters on multi-door access control projects where power supply capacity affects how many electrified devices can run on a single panel. The field-changeable design allows the same lock body to be reconfigured from fail safe (8272) to fail secure (8273) without replacing the hardware. If building use changes or code requirements change for an opening, the electrical function can be adjusted in the field without a new lock body purchase.

For compatible power supplies, access control components, and electrified hardware accessories, browse our electronic hardware catalog.