LCN 4040SE-3210 Grade 1 SE Tra...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$109.00
$81.13
LCN 4040SE-3210 4040SE Series SE Transformer from 120V to 24V

LCN 4040SE-3210 Grade 1 SE Transformer 120V to 24V Fire/Life Safety Door Closer Component

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Model: 4040SE-3210

In Stock (leaves warehouse same day if ordered before 3pm ET)

$109.00
$81.13
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LCN 4040SE Series Grade 1 SE Transformer 120V to 24V Fire/Life Safety Door Closer Component

Professional Voltage Conversion Component for Fire/Life Safety Applications

The LCN 4040SE Series SE Transformer provides reliable 120V to 24V voltage conversion for fire and smoke barrier door applications. This Grade 1 component is specifically designed to interface with 4040SE Series fire/life safety closers/holders, ensuring proper voltage supply for hold-open mechanisms that release during current interruption. The transformer supports both concealed and surface wiring configurations for flexible installation in commercial door control systems.

Professional Features & Benefits

  • Voltage Conversion: Transforms standard 120V power to 24V for compatibility with 4040SE Series fire/life safety door systems.
  • Fire/Life Safety Integration: Designed specifically for fire and smoke barrier door applications with reliable current interruption response.
  • Grade 1 Performance: Professional-grade construction meets commercial door hardware performance standards for demanding applications.
  • Flexible Wiring Options: Supports both concealed and surface wiring configurations for adaptable installation requirements.
  • Alarm System Interface: Compatible with building alarm systems for integrated fire/life safety door control operations.
  • 4040SE Series Compatibility: Engineered specifically for use with LCN 4040SE Series closers/holders for seamless system integration.
  • Over-Voltage Protection: Includes protective circuitry to safeguard connected door control components from electrical damage.

Technical Specifications

  • Commercial/Residential: Commercial
  • Department: Door Hardware
  • Product Attribute: Parts and Accessories
  • Product Category: Door Controls
  • Product Group: Door Controls
  • Product Subgroup: Parts and Accessories
  • Product Type: Parts and Accessories
  • Series: 4000 Series
  • Subcategory: Parts and Accessories

Professional Applications

  • Fire and Smoke Barrier Door Systems
  • Commercial Building Life Safety Compliance
  • Healthcare Facility Fire Door Controls
  • Educational Institution Safety Systems
  • Multi-Story Building Fire Protection
  • Industrial Facility Emergency Egress
  • Government Building Fire/Life Safety

Why Choose LCN Quality?

LCN 4040SE Series components deliver professional-grade reliability with Grade 1 construction engineered for demanding fire/life safety applications. The transformer provides essential voltage conversion with over-voltage protection for long-term system reliability. Designed specifically for integration with building alarm systems where dependable fire door control performance is critical for life safety compliance.

Manufacturer Resources

LCN Full Line Catalog

Product Specs

Series:
4000 Series
Subcategory:
Parts and Accessories
Product Group:
Door Controls
Product Subgroup:
Parts and Accessories
Product Type:
Parts and Accessories
Commercial/Residential:
Commercial
Product Attribute:
Parts and Accessories
Product Category:
Door Controls
Department:
Door Hardware

LCN 4040SE-3210 – Frequently Asked Questions

1) Will the 4040SE-3210 transformer work with any brand of electric hold-open closer?
It's built for LCN 4040SE Series closer/holders specifically. If you're powering a different manufacturer's electrified holder, size the supply to that unit's own requirements rather than assuming this one drops in.
2) Does this tie into the building fire alarm so the doors drop on alarm?
Yes. The 4040SE transformer is meant to interface with building alarm systems, and the 4040SE holders it powers release the door when current is interrupted. On alarm, the panel drops power and the doors close, which is how fire and smoke barrier openings are supposed to behave.
3) Can a Cal-Royal 900 Series door closer accessories kit be used in place of the LCN 4040SE-3210 transformer?
No. The 4040SE-3210 is an electrical component that converts 120V building power down to 24V so a 4040SE Series fire/life safety closer/holder can hold a door open and release it when current is interrupted. The Cal-Royal 900 Series accessories kit is a mechanical accessory group for 900 Series door closers and carries no voltage conversion function, so it cannot feed an electrified hold-open. If the opening needs power to a 4040SE closer/holder, the transformer is the part that does that job.
4) We want a hold-open on a door but have no power at the frame - what is an alternative to the LCN 4040SE transformer setup?
A mechanical hold-open arm is the route when there is no circuit at the opening. The Deltana DCHA1050 is a hold open arm for the DC10 door closer, and it holds the door by arm geometry rather than by an electrified magnet, so no transformer or alarm interface is involved. The LCN 4040SE-3210 exists specifically for the powered approach, where the closer/holder is fed 24V and releases the door when the building alarm interrupts current - that release-on-alarm behavior is what a mechanical hold-open arm does not provide, and it is generally what a fire or smoke barrier door requires.
5) Can this transformer be installed with surface-run conduit, or does it have to be concealed?
Both work. The 4040SE transformer supports concealed and surface wiring configurations, so you can run it in the frame or wall cavity on new construction, or surface it on a retrofit where you can't open the wall.
6) I need a closer accessory, not a power supply. What else is out there for other closer brands?
The 4040SE-3210 is a voltage transformer, so it won't help if you're after a mechanical part. For arms and hardware on other closers, ZenSupply carries the Deltana DCHA1050 hold open arm for the DC10 closer, the Deltana DCCA4041 cushion arm for the DC40, the Dorma 15323 1-1/2 inch offset bottom arm with cover, and the Cal-Royal 900 Series closer accessories kit. None of those are electrified holders.
7) Does the Dorma 15323 offset bottom arm work on a fire rated opening the way the 4040SE components do?
The Dorma 15323 is a 1-1/2 inch offset bottom arm with cover, standard duty, and it is listed with a fire rating of No. The LCN 4040SE-3210 is built for fire and smoke barrier door applications, supplying 24V to a 4040SE closer/holder that releases the door when the alarm system interrupts current. If the opening is a fire or smoke barrier, the 15323 is not the part to specify there.
8) Is the LCN 4040SE transformer rated for commercial buildings like hospitals and schools?
It's a commercial component, Grade 1, and the 4040SE system it feeds is intended for fire and smoke barrier doors in settings like healthcare, education, government and multi-story commercial buildings.
9) Does the transformer protect the closer if there's a voltage spike?
It carries over-voltage protection circuitry to keep connected door control components from electrical damage. That matters on a 24V holder wired back to a fire panel, where a surge on the line would otherwise reach the closer's solenoid.
How fast can I get the LCN 4040SE-3210 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the LCN 4040SE-3210 come with a warranty?
Absolutely. The LCN 4040SE-3210 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the LCN 4040SE-3210?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the LCN 4040SE-3210 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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