NSi Industries 40VA Bell Trans...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$111.36
NSi Industries 40VA Bell Transformer, 120V to 24V, Screw Mount

NSi Industries 40VA Bell Transformer, 120V to 24V, Screw Mount

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Model: TA599

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

$111.36
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NSi Industries 40VA Bell Transformer, 120V to 24V, Screw Mount

The NSi Industries 40VA Bell Transformer steps down 120V line voltage to a 24V low-voltage output, making it a reliable choice for powering bells, buzzers, and chimes. Rated for 40VA and built for a 50-60 Hz frequency range, this screw-mount transformer is UL-CSA listed for dependable performance in residential and light commercial signaling circuits.

Key Features

  • Voltage Conversion: Steps down 120V input to a 24V output, matching the requirements of common low-voltage bell, buzzer, and chime circuits.
  • Power Rating: 40VA capacity provides sufficient power for typical doorbell and signaling applications.
  • Screw Mount: Screw mount design allows for secure, straightforward installation to a junction box, panel, or mounting surface.
  • Frequency Rating: Rated for 50-60 Hz, ensuring compatibility with standard AC power systems.
  • Application-Specific Design: Purpose-built for bells, buzzers, and chimes, delivering consistent low-voltage output for signaling equipment.
  • Transformer Type: Classified as a Transformers-type product, engineered specifically for stepping down voltage in signaling circuits.

Certifications & Compliance

  • UL-CSA Listed

Technical Specifications

  • Brand Name: NSi
  • Mounting: Screw Mount
  • Standard: UL-CSA
  • Frequency Rating: 50-60 Hz
  • Application: Bells-Buzzers-Chimes
  • Type: Transformers

Typical Applications

  • Doorbell and Chime Circuits
  • Bell and Buzzer Signaling Systems
  • Low-Voltage Control Circuits
  • Residential Electrical Installations
  • Light Commercial Signaling Applications
  • Junction Box and Panel-Mounted Transformer Installations

Why NSi Industries?

NSi Industries builds this 40VA transformer to UL-CSA listing standards, giving electricians and installers confidence in code-compliant performance for low-voltage signaling work. The screw-mount design and defined 50-60 Hz frequency rating make it a straightforward, dependable choice for bell, buzzer, and chime circuits in both residential and light commercial settings.

Manufacturer Resources

Spec Sheet

Product Specs

Mounting Method:
Screw Mount
Brand Name:
NSi
Standards:
UL-CSA
Frequency Rating:
50-60 Hz
Application:
Bells-Buzzers-Chimes
Product Type:
Control Transformer
Listing:
UL-CSA
Department:
Electrical
Product Group:
Power Distribution
Product Subgroup:
Transformers

NSi TA599 – Frequently Asked Questions

1) Will a 40VA 24V transformer run my doorbell chime, or do I need more power?
The NSi TA599 steps 120V down to 24V at 40VA, which covers typical doorbell, bell, buzzer and chime circuits. Add up the VA draw of every device on the secondary (chime, plus any video doorbell) and keep the total at or under 40VA. If your chime manufacturer calls for 16V or 10V, this is the wrong unit, since the output here is fixed at 24V.
2) How does the NSi TA599 transformer mount - can it go on a junction box?
It is a screw-mount transformer, so it fastens directly to a junction box, panel, or mounting surface. The primary leads land inside the box on the 120V side and the low-voltage secondary runs out to the bell or chime. No DIN rail or plug-in option on this one.
3) Can an Eaton C341 control transformer kit be used in place of the NSi TA599 bell transformer?
Not directly, because the primary voltages differ. The NSi TA599 is a 120V to 24V bell transformer rated 40VA for bells, buzzers and chimes. The Eaton C341BE enclosed control transformer kit is a 100 VA unit with a 240/480V primary and a 24V secondary, so it expects a 240V or 480V supply rather than a 120V line. If the circuit you are feeding is 120V, the TA599 matches the supply; the C341BE suits 240/480V machine control power.
4) Is this NSi bell transformer UL listed for residential code work?
The TA599 carries a UL-CSA listing, which is what an inspector looks for on a low-voltage signaling transformer in residential and light commercial work. It is also rated 50-60 Hz, so it works on standard North American 60 Hz service and on 50 Hz systems.
5) Can I use a bell transformer like this to power a 24V control circuit for HVAC or a magnetic lock?
The TA599 is built as a 24V signaling transformer for bells, buzzers and chimes, and the description also lists low-voltage control circuits among its uses. What it is not is an enclosed industrial control transformer: there is no enclosure and no 240/480V primary option. For a machine or panel control circuit, look at an enclosed control transformer such as the Eaton C341 Series kit, 100 VA with a 240/480V primary and 24V secondary.
6) My existing doorbell transformer has a 120V primary but I need more than 40VA - what are my options?
The TA599 tops out at 40VA on a 120V primary. If the load is heavier, you need a larger transformer; among enclosed control transformers we carry, the Eaton C341 Series kit is rated 100 VA but runs a 240/480V primary, not 120V, so it is not a drop-in on a residential 120V circuit. Size the replacement to the same 120V primary and 24V secondary before going up in VA.
7) Is the NSi TA599 transformer supplied in an enclosure or does it need to be installed inside a box?
The TA599 is an open screw-mount unit, not an enclosed kit. It is intended to be fastened to a junction box, panel, or other surface with the 120V connections made inside the enclosure. If your install needs the transformer itself enclosed, an enclosed control transformer kit such as Eaton's C341 Series is the different product type to look at.
8) I need more than 40VA on a 24V control circuit - what are the alternatives to the NSi TA599?
The NSi TA599 is rated 40VA at 24V output. For more capacity on a 24V secondary, the Eaton C341BE enclosed control transformer kit is rated 100 VA, and the Eaton C341AC control transformer kit is rated 50 VA. Both of those Eaton kits are built for a 240/480V primary, so confirm your available supply voltage before specifying one in place of the 120V-input TA599.
9) What is the difference between the NSi TA599 and the Eaton E30 transformer light unit?
They are different kinds of product. The NSi TA599 is a standalone step-down transformer that takes 120V in and delivers 24V out at 40VA for bell, buzzer and chime circuits, and it mounts with screws to a junction box, panel or surface. The Eaton E30BM is a 30.5 mm metallic transformer light unit rated 120 Vac - a panel-mounted pilot light assembly with an internal transformer, not a power source for separate signaling devices.
10) What is the NSi part number for this 40VA 120V to 24V bell transformer?
Order it as NSi Industries TA599. That is the only model on the 40VA 120V-to-24V screw-mount bell transformer, so there are no finish, voltage, or mounting variants to specify.
11) Is the NSi TA599 listed for code-compliant work, and how does that compare to the Eaton control transformer kits?
The NSi TA599 is UL-CSA listed and rated for 50-60 Hz operation, which covers standard North American AC supplies for residential and light commercial signaling circuits. The Eaton C341AC and C341BE are catalogued as control transformer kits in the Freedom/Advantage and C341 series respectively and are sized for 240/480V primary control power, so the deciding factor between them and the TA599 is supply voltage and application rather than listing.
How fast can I get the NSi TA599 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 NSi TA599 come with a warranty?
Absolutely. The NSi TA599 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 NSi TA599?
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 NSi TA599 from ZenSupply?
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