resideo Honeywell
Resideo 1321-1 AC Transformer – 120V to 16.5V 25VA UL Listed for Security Alarm Systems
Resideo 1321-1 AC Transformer – 120V to 16.5V 25VA UL Listed for Security Alarm Systems
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Resideo AC Transformer 120V to 16.5V 25VA – Model 1321-1
The Resideo 1321-1 AC Transformer is a standard security alarm system transformer designed to provide consistent, reliable power to your alarm panel. Converting 120 VAC input into a stable 16.5 VAC output at 25VA, this transformer is an industry-standard choice for both new alarm installations and replacement applications.
Key Features
- Model: 1321-1 (Resideo / Honeywell Home)
- Input: 120 VAC, 60Hz, 0.30A
- Output: 16.5 VAC, 25VA
- Type: Plug-in, Class 2 transformer
- Certification: UL Listed 3LJS E310452
- Applications: Standard alarm panels, security system power supply
- Reliable replacement part for existing alarm systems
Why Choose This Transformer?
A dependable transformer is critical to maintaining the performance of your burglar alarm system. The Resideo 1321-1 provides the stable, regulated power your system needs to run reliably day after day. With its UL listing and proven durability, this transformer is a trusted choice by installers nationwide.
Specifications
| Brand | Resideo / Honeywell Home |
| Model Number | 1321-1 |
| Part Number | ETL-AA0252-W165152 P/N1321-1 |
| Input | 120 VAC, 60Hz, 0.30A |
| Output | 16.5 VAC, 25VA |
| Listing | UL Listed, Class 2 Transformer |
| Use | Standard security alarm systems (new installs or replacements) |
Ideal Applications
Designed for security alarm panels, this transformer is the right fit for residential and commercial alarm systems requiring 16.5V AC at 25VA. Installers and property owners rely on this model for long-lasting, consistent performance.
Note: Verify transformer compatibility with your alarm panel before replacement. Professional installation recommended for security system power supplies.
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