Altronix MAXFIT5FD 10A 12VDC Access Control Power Supply
Overview
The Altronix MAXFIT5FD is a 10-amp, 12VDC access control power supply housed in a UL Listed indoor wallmount enclosure. Designed for multi-door commercial access control deployments, the MAXFIT5FD consolidates power distribution and access control management into a single cabinet — reducing conduit runs, termination points, and the per-door labor that drives up installation cost on multi-reader builds. If you're sizing power for a door controller expansion or a greenfield mid-rise install, this is a purpose-built unit from Altronix, a manufacturer whose access control power products are a staple in commercial integrator toolkits.
Key Features
- 10A @ 12VDC Output: A full 10 amps at 12 volts gives you headroom to power multiple door controllers, magnetic locks, and peripheral readers from a single supply — fewer panels to mount, fewer circuits to wire, and a cleaner audit trail when troubleshooting. Most commercial mag-locks draw 500mA–650mA each; at 10A you have capacity for a multi-door deployment without derating concerns under normal load.
- DC Output Architecture: Pure DC output ensures compatibility with the vast majority of 12VDC-rated access control hardware including electromagnetic locks, electric strikes, and door controllers. AC ripple issues that plague lower-grade supplies don't apply here — lock release is clean and consistent.
- UL Listed: UL certification on the enclosure and supply is not optional in commercial access control — AHJs in most jurisdictions require it for permitted door hardware. The MAXFIT5FD carries UL listing, so it clears that hurdle without requiring a variance or supplemental documentation at inspection.
- Indoor Wallmount Enclosure: The included wallmount enclosure (16.5" W x 20.5" H x 6.25" D) provides a protected, organized home for the power supply and associated access control hardware. The 20.5-inch height accommodates a transformer, board-level components, and wiring terminations without cramping — important when you're pulling multiple 4-conductor runs into the same location.
- Enclosure Dimensions (16.5" W x 20.5" H x 6.25" D): The 6.25-inch depth means it clears standard commercial stud cavities for surface-mount applications and fits flush against drywall or concrete block without protruding into high-traffic areas. Size it against your IDF closet or electrical room layout before committing — this is a mid-size cabinet, not a compact single-door enclosure.
- Integrated Access Control Management: The MAXFIT5FD bundles power supply and access control module functionality, which on multi-door jobs eliminates the need to source and marry separate power and control hardware. Fewer vendors, fewer compatibility questions, one warranty contact for the combined assembly.
Integration and Compatibility
The MAXFIT5FD is designed for integration within commercial access control systems where a centralized 12VDC power source is required. The 12VDC/10A output is compatible with the standard operating voltage of most commercial electromagnetic locks, electric strikes, and door access readers. When pairing with an access control panel or distributed reader architecture, verify that aggregate door hardware draw does not exceed the 10A rated output — budget approximately 15–20% headroom below rated capacity for sustained operation. For facilities requiring expanded capacity beyond what a single MAXFIT5FD provides, Altronix's broader power distribution lineup includes higher-amperage and multi-voltage variants. Consult your access control system design guide to confirm lock-type and controller-voltage compatibility before specifying. The indoor-only enclosure rating means this unit belongs in a conditioned equipment room, IDF closet, or mechanical room — not in a vestibule or exterior mounting scenario.
Frequently Asked Questions
Q: Is the Altronix MAXFIT5FD UL Listed?
A: Yes. The MAXFIT5FD carries UL listing, which is required by most jurisdictions for commercial access control power supplies used in permitted door hardware installations.
Q: What is the output voltage and current of the MAXFIT5FD?
A: The MAXFIT5FD provides 12VDC output at up to 10 amps, making it suitable for powering multiple door controllers, mag-locks, and readers from a single supply in a multi-door access control deployment.
Q: Can the MAXFIT5FD be installed outdoors?
A: No. The MAXFIT5FD is rated for indoor wallmount installation only. It should be installed in a conditioned space such as an IDF closet, equipment room, or mechanical room — not in an exterior or exposed location.
Q: What are the enclosure dimensions for the MAXFIT5FD?
A: The wallmount enclosure measures 16.5 inches wide by 20.5 inches tall by 6.25 inches deep, providing sufficient room for the power supply, access control module, and associated wiring terminations.
Q: How many doors can the MAXFIT5FD support?
A: Exact door count depends on the current draw of your specific lock hardware and controllers. At 10A output and with typical mag-locks drawing 500–650mA each, the supply can theoretically support a multi-door deployment — but always budget 15–20% headroom below rated capacity and verify total load against your hardware specifications.
The MAXFIT5FD sits squarely in the mid-tier of Altronix's access control power lineup — 10 amps at 12VDC in a UL Listed indoor wallmount cabinet that measures 16.5" x 20.5" x 6.25". That enclosure depth is a practical detail: 6.25 inches clears a surface-mount condition in virtually any IDF closet without eating into aisle clearance, and the 20.5-inch height gives installers real estate for tidy wire management when you're terminating multiple door runs.
Technical Highlights:
- 10A @ 12VDC Output: At full rated output you're looking at 120W of continuous DC power — enough headroom for 12–15 standard mag-locks (assuming ~650mA each) with 20% reserve margin, or fewer locks combined with reader and controller loads. Size conservatively and you avoid nuisance trips under cold-start inrush.
- UL Listing: UL certification on an access control power supply isn't a marketing point — it's an AHJ requirement in most commercial permit jurisdictions. The MAXFIT5FD's UL listing means no variance requests, no supplemental engineer sign-offs, and no hold-up at inspection on the power supply line item.
- Integrated Enclosure (16.5" W x 20.5" H x 6.25" D): Buying the supply and enclosure as a matched unit eliminates the spec-and-source step for the cabinet and ensures the board layout, knockouts, and mounting are already matched — a time saver on multi-door jobs where you're racking up multiple panels per floor.
Deployment Considerations:
- Verify aggregate door hardware current draw — including inrush — before finalizing panel count. A 10A-rated supply derated to 8A sustained gives you less margin than the nameplate suggests when controllers and readers share the circuit.
- Indoor-only rating is a hard constraint. Do not install the MAXFIT5FD in unconditioned spaces, exterior vestibules, or anywhere ambient temperature and humidity aren't controlled — the enclosure provides physical protection but no environmental sealing.
The MAXFIT5FD is the right call for a commercial multi-door build in an IDF or security equipment room where the AHJ will walk the job and UL compliance on the power supply is non-negotiable — a corporate campus lobby, a mid-rise office floor, or a healthcare facility where the permit process is rigorous.
