Altronix TP2450 24VAC 50VA Plugin Transformer
The Altronix TP2450 is a compact plugin transformer purpose-built to supply 24VAC secondary power for integrated access control, alarm, and door strike systems. Accepting 115VAC input, the TP2450 delivers 50VA output capacity and integrates directly into Altronix SMP-3 control modules, eliminating the need for external power routing and reducing panel footprint. UL Listed and CE certified construction ensures code compliance and reliability in controlled security environments.
Key Features
- 50VA Output Capacity at 24VAC: Sufficient to power multiple auxiliary devices—access control readers, door strikes, auxiliary relays—without requiring a separate, space-consuming power supply enclosure.
- 115VAC Primary Input: Standard wall voltage directly into the transformer; no exotic supply lines or step-down modules needed on the installation side.
- Plugin Design for SMP-3 Integration: Mounts directly into Altronix SMP-3 platforms as a cartridge module, eliminating external wiring and field termination risk.
- UL Listed and CE Certified: Meets North American and European safety standards, so you'll pass inspection without exception documentation.
- Compact Form Factor: Minimal depth and footprint means you won't sacrifice valuable DIN rail or wall space in tight electrical closets or cabinet installations.
- Lifetime Limited Warranty: Manufacturer backs the unit for the life of the equipment, transferable across ownership changes in multi-tenant or resale scenarios.
Integration & Compatibility
The TP2450 is engineered as a direct replacement and accessory for Altronix SMP-3 power supplies. If you operate an existing SMP-3–based access control or alarm platform and need additional 24VAC capacity without adding a standalone transformer, this plugin module integrates seamlessly. The fixed 115VAC input and 24VAC 50VA output specification makes it suitable for door strike auxiliary power, integrated alarm system voltage expansion, and secondary power sourcing for control modules in small-to-mid-scale deployments.
When to Choose a Different Model
If your installation requires higher VA capacity (above 50VA) to handle multiple door strikes, badge readers, or relay racks simultaneously, consider a higher-capacity transformer in the Altronix lineup or a standalone industrial step-down unit rated for your total load. Similarly, if you're not using an SMP-3 as your control platform, this plugin module will not fit your architecture—a universal 24VAC transformer or rail-mount option may be more appropriate. Verify your existing platform compatibility before ordering.
Frequently Asked Questions
Q: Is the TP2450 compatible with non-Altronix SMP-3 control panels?
A: No. The TP2450 is a plugin cartridge designed specifically for Altronix SMP-3 platforms. It will not fit or function in other control modules or standalone installations. For non-SMP-3 systems, use a standard 24VAC transformer rated for your load.
Q: Can the TP2450 handle simultaneous door strikes and badge readers?
A: At 50VA, the TP2450 can theoretically supply 2.08A at 24VAC. Typical door strikes draw 0.5–1A, and badge readers draw 0.1–0.2A. Two simultaneous door strikes may exceed capacity. Calculate your total load before deployment—if you're adding more than one strike or multiple readers, confirm the 50VA ceiling covers your scenario.
Q: Is this transformer suitable for outdoor installations?
A: The TP2450 is rated for controlled environments. If you need to power outdoor access control readers or door strikes, house the transformer indoors or in a weatherproof enclosure and run the 24VAC secondary lines to the field devices. The transformer itself is not IP-rated for direct weather exposure.
Q: What is the warranty on the TP2450?
A: Altronix provides a Lifetime Limited Warranty on the TP2450. Terms cover defects in materials and workmanship under normal use; refer to the manufacturer's warranty document for exclusions and claim procedures.
Q: Does the TP2450 require any special wiring or breaker protection?
A: The primary side accepts standard 115VAC input; a 15A breaker or fused disconnect is typical for this capacity. Follow local electrical code and your system designer's specifications for primary-side protection. Secondary side (24VAC) does not require breakers in most jurisdictions, but verify your AHJ requirements.
Ted PerryPerspective based on aggregated IP Security Depot and affiliated engineering team experience.
The Altronix TP2450 is a straightforward engineering solution: if you're building a modular access control or alarm system on an SMP-3 platform and your initial 24VAC budget has run short, this plugin cartridge lets you add capacity without ripping out your control module. The 50VA spec is real—it's 2.08A at 24VAC, period. That covers a single door strike plus badge readers or a small relay bank, but you need to do the math before you wire.
Technical Highlights:
- 50VA Secondary Capacity: 2.08A maximum at 24VAC. Enough for one 0.8A strike plus two 0.1A readers with headroom, or three readers alone. Most single-door systems fit comfortably; multi-strike installations need load calculation.
- 115VAC Primary Input: Standard branch circuit voltage; no exotic supply transformer needed upstream. Pairs with a 15A breaker typical for this VA class and keeps installation straightforward.
- Plugin Cartridge Form: Eliminates external transformer box, spare breakers, and field termination. If you're working inside a cabinet or electrical closet, that footprint savings is real. One less device to manage and one fewer potential failure point.
- UL Listed and CE Certified: Code compliance is built in. You won't spend engineering time on variance requests or third-party testing; the unit passes North American and European inspection as-is.
Deployment Considerations:
- Load Ceiling is Hard: At 50VA, you cannot exceed 2.08A continuous. Door strike inrush current is typically 3–5A for 500ms; ensure your SMP-3 base supply and upstream breaker can tolerate that transient. A stuck solenoid or fault condition will trip protection faster than you'd expect.
- SMP-3 Lock-In: This is not a universal transformer. It fits only SMP-3 platforms. If your project roadmap includes a controller swap or multisite standardization on a different platform, you're buying single-use hardware. Verify platform longevity before committing.
- No Outdoor Rating: The unit itself has no environmental enclosure. If any secondary lines run outside or to exposed areas, you must bundle them into a weatherproof conduit or separate outdoor-rated transformer box. Do not assume the TP2450 can sit in a wall-mount cabinet on a building exterior.
Deploy the TP2450 when you've built a small access control system on SMP-3 and discovered you need a second 24VAC branch without replacing your control module. It's a good fit for retrofit and expansion work—not for new greenfield multi-strike or large relay bank deployments, where a larger-capacity transformer or a parallel SMP-3 unit makes more sense.
