Altronix MAXFIT55F 10A 12VDC Access Control Power Supply
Overview
The Altronix MAXFIT55F is a 12VDC, 10-amp power supply designed for commercial access control and surveillance installations where a reliable, UL Listed power source is required in a hardened steel enclosure. If you are specifying power for door controllers, electric locks, or multi-reader deployments, the MAXFIT55F delivers the output capacity and compliance credentials to satisfy both installers and inspectors. The steel enclosure measures 16.5" W x 20.5" H x 6.25" D — sized to accommodate internal distribution hardware alongside the power supply chassis itself.
Altronix has a long track record supplying power products to the physical security market. Browse the full Altronix power supply line for compatible distribution boards and ancillary hardware, or explore the broader access control power products category to compare output ratings and enclosure formats.
Key Features
- 10A @ 12VDC Output: Ten amps at 12 volts gives you enough headroom to run multiple electric strikes, magnetic locks, or reader panels from a single supply — reducing home-run wiring runs back to a head-end panel and simplifying conduit layout on multi-door deployments.
- UL Listed: UL listing is a hard requirement on most commercial and government access control bids. The MAXFIT55F ships with this certification in place, so you are not retrofitting compliance after the fact or risking a failed inspection on a door-access system where AHJ sign-off is mandatory.
- Steel Enclosure (16.5" x 20.5" x 6.25"): The all-steel housing resists tampering and provides a grounded chassis for sensitive electronics. At 20.5 inches tall, the enclosure has room to mount a distribution board or battery backup alongside the power supply — standard practice for access control panel builds that need holdover during power loss.
- 12VDC Output: Twelve volts DC is the native operating voltage for the vast majority of electric strikes, maglocks, and single-door access controllers on the market. No step-down converters or voltage regulators needed between the supply output and your lock hardware.
Integration & Compatibility
The MAXFIT55F is engineered to pair with Altronix's own ACM8 access control modules and BC750 battery charger — both referenced in the product designation — making it a natural fit within an Altronix-native panel build. For installations running third-party door controllers, the 12VDC output is universally compatible with lock hardware from HES, Adams Rite, Securitron, and most magnetic lock manufacturers. When planning a multi-door installation, cross-reference the total lock current draw plus reader standby current against the 10A rated output to maintain a 20–25% safety margin. Pair with a compatible access control system or review our surveillance power products for camera-side power requirements on combined installations.
Frequently Asked Questions
Q: What output voltage and current does the MAXFIT55F provide?
A: The MAXFIT55F outputs 12VDC at up to 10 amps, suitable for powering multiple electric locks, readers, or access control modules from a single supply.
Q: Is the MAXFIT55F UL Listed?
A: Yes, the MAXFIT55F is UL Listed, meeting the certification requirements for commercial access control and security installations where AHJ approval is required.
Q: What are the enclosure dimensions of the MAXFIT55F?
A: The steel enclosure measures 16.5 inches wide by 20.5 inches tall by 6.25 inches deep, providing sufficient interior space for distribution boards or battery backup hardware alongside the power supply.
Q: What Altronix modules is the MAXFIT55F designed to work with?
A: Based on the product designation, the MAXFIT55F is configured to integrate with Altronix ACM8 access control modules and the BC750 battery charger within the same enclosure.
Q: Can the MAXFIT55F power third-party electric locks and magnetic locks?
A: The 12VDC output is the standard operating voltage for most electric strikes and magnetic locks on the market. Verify that the combined current draw of all connected devices stays within the 10A rated output, with a 20–25% margin recommended.
The MAXFIT55F is the kind of supply I spec when I need a UL Listed 12VDC source that fits inside a panel build without hunting for a third-party enclosure. The 10-amp output at 12VDC is the right capacity for most 4-to-8 door access control deployments — enough to run readers, strikes, and a small distribution board without stacking a second power supply.
Technical Highlights:
- 10A @ 12VDC: Ten amps is the practical ceiling for most single-enclosure multi-door builds. Running a pair of maglocks at 500mA each plus eight readers at 150mA still leaves you well under the rated output with margin to spare.
- UL Listed: On any project where a licensed electrician or AHJ is involved, UL listing on the power supply is non-negotiable. The MAXFIT55F ships compliant — you are not chasing a field listing after the install is done.
- Steel Enclosure at 16.5" x 20.5" x 6.25": The 20.5-inch height is the key dimension. It gives you room to mount the ACM8 distribution board and BC750 battery charger in the same box, keeping wiring contained and the installation clean for a final walk-through.
Deployment Considerations:
- Size your battery backup to the load before ordering — the BC750 charger referenced in the product designation supports sealed lead-acid batteries, but battery selection depends on your holdover time requirement and total current draw.
- The 6.25-inch depth is the limiting factor in tight electrical rooms. Measure your wall cavity clearance before committing to a surface-mount installation in a shallow mechanical space.
This supply is the right call for a commercial office or multi-tenant facility with 4–8 controlled doors, where the AHJ requires UL Listed hardware and the integrator wants a single Altronix-native enclosure for power, distribution, and battery backup in one box.
