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LCN SEM7840 DKBRZ Electromagnetic Door Holder, Wall-Mounted, Bronze, Fail Safe - Electromagnetic Door Holders & Releases
LCNElectromagnetic Door Holders & Releases

LCN SEM7840 DKBRZ Electromagnetic Door Holder, Wall-Mounted, Bronze, Fail Safe

3G Electric supplies the LCN SEM7840 DKBRZ Electromagnetic Door Holder, a wall-mounted, bronze unit with a Fail Safe failure mode. As a global industrial solutions provider, we interpret customer demand and deliver…

SKU 3G-OTH-512613

Also listed as: SEM7840DKBRZ · SEM7840-DKBRZ

Brand
LCN
Item
SEM7840 DKBRZ Electromagnetic Door Holder, Wall-Mounted, Bronze, Fail Safe
Part Number
SEM7840 DKBRZ
Category
Electromagnetic Door Holders & Releases
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Technical Specifications

LCN
Manufacturer Part Number
SEM7840 DKBRZ
Type
Bronze
Failure Mode
Fail Safe

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LCN Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

3G Electric supplies the LCN SEM7840 DKBRZ Electromagnetic Door Holder, a wall-mounted, bronze unit with a Fail Safe failure mode. As a global industrial solutions provider, we interpret customer demand and deliver genuine equipment across 14 departments—and far more—with specialist depth in combustion, pumps, and controls as a trust anchor.

Frequently Asked Questions

What is the LCN SEM7840 DKBRZ Electromagnetic Door Holder used for?

The LCN SEM7840 DKBRZ is a wall-mounted electromagnetic door holder used to hold fire or smoke doors open until a fire alarm triggers. Its Fail Safe mode releases the door automatically upon power loss, ensuring fire compartmentation in commercial buildings, hospitals, and schools.

What are the specifications of the LCN SEM7840 DKBRZ?

The LCN SEM7840 DKBRZ is a bronze, wall-mounted electromagnetic door holder with a Fail Safe failure mode. It is manufactured by LCN under part number SEM7840 DKBRZ. This unit releases the door when power is interrupted, meeting fire safety code requirements for automatic closing.

Where to buy the LCN SEM7840 DKBRZ worldwide?

3G Electric supplies the LCN SEM7840 DKBRZ worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time; we source genuine LCN equipment across 14 industrial departments and beyond.

How to install the LCN SEM7840 DKBRZ door holder?

Install the LCN SEM7840 DKBRZ on a wall at the door's open position, typically 6–12 inches from the hinge. Mount the strike plate on the door, align the magnet face, and connect 24 VDC power per local codes. Test that the door releases when power is cut. Consult a licensed electrician.

Used in

Common applications for LCN
Commercial office buildings — LCN 4010 Series top frame-mount door closers with regular arm and adjustable spring size 6 for interior doors.
Healthcare facilities — LCN SEM7810 series electromagnetic door holders for holding fire-rated corridor doors open and releasing on alarm.
Educational institutions — LCN 4810 Series track arm door closers for high-traffic exterior doors in aluminum finish.
Industrial plants — LCN SEM7820-825 AL floor-mounted electromagnetic door holders for fire doors in manufacturing areas.
Retail entrances — LCN 4010 Series bronze door closers with non-hold open and regular arm for ADA-compliant opening force.
Hospitality venues — LCN magnetic door holders SEM7850-828 AL for wall-mounted hold-open on smoke doors in lobbies.
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LCN Products

3G Electric supplies LCN electromagnetic door holders & releases. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Floor-mounted electromagnetic door holder constructed of aluminum. Fail-safe operation releases the door upon power loss, allowing automatic closure. Used to hold fire-rated doors open in commercial and industrial buildings
LCN
Floor-mounted electromagnetic door holder constructed of aluminum. Fail-safe operation releases the door upon power loss, allowing automatic closure. Used to hold fire-rated doors open in commercial and industrial buildings

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