The STI STI-7500C is a polycarbonate enclosure with open back box for flush-mount applications and interior key lock. First, the installer flush-mounts the open back box. Then the hinged polycarbonate cover locks down with an interior key. As a result, the STI-7500C protects a flush-mounted device while preserving visibility through the clear cover.
What the STI STI-7500C is built for
Annunciators, keypads, and similar wall-mounted devices need protection from impact, dust, and casual tampering. However, full metal cabinets block visibility and complicate installation. Therefore, the STI-7500C uses a clear polycarbonate cover for visibility and an interior key lock for routine staff access.
Verified STI STI-7500C specifications
- Type: Polycarbonate enclosure with open back box for flush-mount applications
- Lock: Interior key lock
- Materials: Spacer, hinges, and cover are formed from super-tough polycarbonate
- UV stabilization: Cover is UV-stabilized
- Polycarbonate working range: -40° to 250°F (-40° to 121°C)
- Included: Mounting hardware and gaskets
- Warranty: Three-year guarantee against polycarbonate breakage in normal use
When the STI STI-7500C is the right choice
Specifically, the STI-7500C fits flush-mount jobs where conduit routes behind the wall. For example, a corridor annunciator with concealed wiring. In addition, the interior key lock keeps the cover closed during normal operation while allowing service access from inside.
Application context
For surface-mount jobs where conduit runs externally, use the STI-7510D (exterior key lock, open conduit backbox) instead. Therefore, confirm wiring routing before specifying. Also, the STI-7500C is part of the broader STI 7500 enclosure family; lock and back box variants exist for most installation styles.
Need help selecting the right STI cover or enclosure for your installation? Our team supports thousands of commercial fire alarm jobs every year. Call us at 1-888-557-0558 or email sales@lifesafetycom.com for application guidance, lead-time updates, or volume pricing.
Additional information
| Weight | 2.5 lbs |
|---|---|
| Dimensions | 11 × 9 × 7 in |
| Condition | New |
| Manufacturers | STI |
| Part Type | Replacement Part |
| Key Features | Search page, STI Global (Americas) Safety Technology InternationalCompareMy ListProductsFire Products, Alarms, Buttons &, Switches, Enclosures &, Covers, Wire Cages, Wireless Products, Build It Configurators |
| Dimensions | 1200×630. |






