LCN 4040SE-3436 On/Off Test Sw...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$104.00
$86.45
LCN 4040SE-3436 4040SE Series On/Off Test Switch Assembly

LCN 4040SE-3436 On/Off Test Switch Assembly with Over-Voltage Protection

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Model: 4040SE-3436

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

$104.00
$86.45
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LCN 4040SE Series On/Off Test Switch Assembly with Over-Voltage Protection

Professional Door Closer Test Switch Component

The LCN 4040SE Series On/Off Test Switch Assembly is a field-replaceable component designed for the 4040SE electromagnetic hold-open door closer system. This momentary switch assembly provides testing functionality for door release mechanisms while offering over-voltage protection for the closer electronics. Compatible with both 24V and 120V systems, this assembly enables testing of hold-open release functions and interfaces with alarm systems for comprehensive fire and smoke barrier door control.

Professional Features & Benefits

  • Door Compatibility: Designed for interior doors up to 4'0" with non-sized cylinder configuration for versatile installation options.
  • Dual Voltage Support: Compatible with both 24V and 120V systems for flexible integration with existing electrical infrastructure.
  • Over-Voltage Protection: Built-in protection circuitry safeguards the door closer electronics from electrical surges and voltage spikes.
  • Field Replaceable Design: Momentary switch board assembly can be replaced in the field without requiring complete closer replacement for cost-effective maintenance.
  • Alarm System Integration: Interfaces with fire alarm and security systems to provide coordinated door control in emergency situations.
  • Adjustable Hold-Open Force: Variable force settings allow customization for different door weights and application requirements.
  • Flexible Installation Options: Supports both concealed and surface wiring configurations for clean installation appearance.
  • Non-Handed Operation: Universal design works with both right and left hand doors and can mount on push or pull side for installation flexibility.

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

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose LCN Quality?

LCN 4040SE Series components deliver professional-grade reliability with heavy-duty construction designed for demanding commercial applications. The field-replaceable design and over-voltage protection ensure long-term system reliability while minimizing maintenance costs. Engineered for fire and smoke barrier door applications where dependable performance and code compliance are essential.

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-3436 – Frequently Asked Questions

1) What is the LCN 4040SE-3436 part, and do I need to replace the whole door closer if my hold-open release stopped working?
The 4040SE-3436 is the on/off test switch assembly with over-voltage protection used in the LCN 4040SE electromagnetic hold-open closer. It's a momentary switch board that swaps out in the field, so a failed test switch or a surge-damaged board doesn't mean pulling and replacing the closer body. Order the assembly, change the board, retest the release.
2) Will the LCN 4040SE test switch assembly work on a 120V closer, or is it 24V only?
Both. The 4040SE-3436 switch assembly is compatible with 24V and 120V systems, so the same part covers a low-voltage closer tied into a fire alarm panel and a line-voltage unit fed from building power.
3) What does the on/off test switch on an LCN 4040SE actually do during a fire drill inspection?
It lets you drop the magnet and release the hold-open at the closer itself, without triggering the building fire alarm. The 4040SE ties into fire alarm and security systems so it releases on an alarm signal; the momentary test switch simulates that release locally so an inspector or maintenance tech can verify the door closes and latches on a smoke or fire barrier opening.
4) What is the difference between a Deltana DCHA1050 hold open arm and the LCN 4040SE-3436 switch assembly if I just need a door to stay open?
They hold a door open by completely different means. The Deltana DCHA1050 is a hold open arm for the DC10 door closer - a mechanical arm that holds the leaf where it is set. The LCN 4040SE-3436 is an electrical component for an electromagnetic hold-open closer: it is a test switch assembly that lets you test the release function, ties into fire alarm and security systems so the door closes on an alarm, and includes over-voltage protection for the closer electronics. If the opening only needs a door propped mechanically, a hold open arm covers it; if the hold-open has to drop out on an alarm signal, the mechanical arm does not do that job.
5) Is the Cal-Royal 900 Series door closer accessories kit an equivalent replacement for an LCN 4040SE test switch assembly?
No. The Cal-Royal 900 Series accessories kit is a set of accessories for Cal-Royal 900 Series commercial door closers, so it addresses the mechanical side of a closer installation. The LCN 4040SE-3436 is an on/off test switch assembly with over-voltage protection - a momentary switch board that tests the hold-open release on a 4040SE electromagnetic hold-open closer and works on both 24V and 120V systems. A kit of closer accessories does not carry the switching electronics, so it will not restore test-switch function on a 4040SE.
6) Does the 4040SE test switch have to be ordered handed for a left hand door?
No handing to specify. The 4040SE electromagnetic hold-open system is non-handed and mounts push side or pull side, so the test switch assembly is the same part regardless of which way the door swings.
7) Can I run the wiring for a 4040SE hold-open closer on the surface if I can't get into the frame?
Yes. The 4040SE supports concealed or surface wiring, so an existing opening where the frame was never prepped for a raceway can still be fed with surface-run conduit or wiremold to the closer.
8) A closer on a fire door stopped releasing - is a Dorma 15323 offset bottom arm a possible fix instead of an LCN test switch assembly?
They solve different failures. The Dorma 15323 is a 1-1/2 inch offset bottom arm with cover, a standard duty mechanical arm that is not fire rated. The LCN 4040SE-3436 is the field replaceable momentary switch board assembly for a 4040SE electromagnetic hold-open closer, with over-voltage protection and an interface to fire alarm and security systems for fire and smoke barrier door control. If the hold-open is not dropping out on an alarm signal, the electrical assembly is the part in that path; a bottom arm is hardware for hanging and swinging the leaf.
9) Why does the LCN 4040SE test switch board include over-voltage protection?
The hold-open magnet circuit runs off building power or an alarm panel, and voltage spikes on that line are what kills closer electronics. The 4040SE-3436 assembly carries protection circuitry on the board itself, so the surge stops at a replaceable part instead of the closer.
10) Is the LCN 4040SE test switch assembly suitable for a residential door?
It's a commercial part. The 4040SE-3436 is built for the 4000 Series commercial closer line and its usual homes are offices, schools, hospitals, retail, warehouses, multi-tenant residential common areas, and government buildings, not a house door.
How fast can I get the LCN 4040SE-3436 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-3436 come with a warranty?
Absolutely. The LCN 4040SE-3436 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-3436?
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-3436 from ZenSupply?
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