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Smoke Alarm · 120V AC Hardwired · Ionization with 9V Battery Backup · BRK 9120BA
SKU: 9120BA
120V AC hardwired ionization smoke alarm with 9V battery backup for continued operation during power outages. Suitable for residential installations requiring interconnect capability with compatible BRK/First Alert hardwired alarms; ionization sensing is commonly used for faster response to fast-flaming fires.
Delivered to you by Sep 18 (Within Western Canada)
If shipping issues arise, contact us and we’ll work with the courier to keep your job on track.
What this product is for
The BRK 9120BA is a 120V AC hardwired smoke alarm with ionization sensing and a 9V battery backup. It is used for residential smoke detection where a permanently wired alarm with backup power and interconnect capability is required.
Use for
Use for houses, apartments, hallways, bedrooms, living areas, and other indoor residential spaces where a hardwired smoke alarm is specified. It can interconnect with up to 12 compatible BRK or First Alert hardwired alarms, and up to 6 compatible signalling devices, so when one unit activates, connected units sound as well.
Avoid for
Avoid using this model where a photoelectric alarm, combination smoke/CO alarm, or specialty detector is required by the application or local code. Do not use outdoors, in wet locations, or in areas with conditions outside the manufacturer's intended installation guidance.
Best for
Best for electricians and contractors replacing or adding a standard 120V hardwired smoke alarm in existing residential systems that use compatible BRK/First Alert interconnect wiring. Also useful where battery backup is needed to maintain protection during a power outage.
Installed in
Typically installed on ceilings or high on walls in finished residential spaces, in accordance with the manufacturer's instructions and local electrical and fire code requirements. The alarm body is approximately 5.6 in diameter (142 mm) and about 1.9 in high (48 mm), which helps when matching existing device footprints.
Why this product exists
This model provides a straightforward hardwired smoke alarm option for standard dwelling applications: AC primary power, replaceable 9V backup battery, local test/silence function, and interconnect capability. A typical buying reason is maintaining compatibility with existing BRK/First Alert hardwired alarm circuits during service replacement or expansion.
Compared with similar products
Compared with battery-only alarms, this unit is intended for permanent 120V installation. Compared with photoelectric models, ionization alarms are typically more responsive to fast-flaming fires, while photoelectric models are generally preferred for smouldering fire conditions. For maximum overall coverage, many installers use a mix of sensing technologies where permitted and appropriate. Actual product selection should follow local code and site requirements.
Specifications
- Model: 9120BA
- Brand: BRK / First Alert compatibility platform
- Product type: Hardwired smoke alarm
- Power source: 120V AC hardwired
- Backup battery: 1 x 9V replaceable battery
- Sensing technology: Ionization
- Interconnect: Yes
- Compatible interconnect capacity: Up to 12 compatible BRK/First Alert alarms plus up to 6 compatible signalling devices
- Sound output: 85 dB at 10 ft (3 m)
- Approximate size: 5.6 in diameter x 1.9 in H (142 mm x 48 mm)
- Installation: Indoor residential hardwired applications
Guidance only: Ionization alarms are commonly used where fast-flaming fire response is a priority, but actual device selection depends on layout, occupancy, local code, and the authority having jurisdiction.
Minimum Order $20
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Standard Shipping-Free on orders over $500 in Metropolitan Areas / Subject to $750 in Rural Areas.
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998(Updated August 2026)
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.
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