Altronix T1CSK3F4D 24VDC Access Control Power Supply with PTC Distribution

Overview

The Altronix T1CSK3F4D is a 24VDC, 6A continuous-output power supply engineered for multi-door access control installations where UL294-listed power, integrated battery backup charging, and fault-isolated distribution are non-negotiable. It accepts 120VAC/60Hz input and delivers a stable 24VDC rail capable of sustaining 6A continuously — enough headroom to power controllers, lock hardware, and readers across four doors without running at the edge of capacity. This unit belongs to the Altronix access control power line, a lineup built specifically for commercial security infrastructure rather than adapted from general-purpose supplies.

If you are sizing power for a new access control deployment or replacing an aging supply in a panel retrofit, the T1CSK3F4D deserves a close look. The built-in 7AH/12VDC battery charging circuit means you do not need a separate charger — the supply handles float charging of a standby battery while simultaneously powering the load, which is exactly what UL294 installations require.

Key Features

• 24VDC @ 6A Continuous Output: Six amps of sustained current is enough for most four-door controller configurations with electric strikes or mag-locks on each door. Running at continuous rather than peak rating matters in 24/7 access environments — you want margin, not a supply already at its ceiling during the morning badge rush.
• Integrated 7AH/12VDC Battery Charging: The onboard charger supports a 7AH sealed lead-acid battery (not included) and maintains float voltage automatically. For UL294-listed installations, standby power is a hard requirement — having the charger built in eliminates a separate component, a separate mounting point, and a potential point of failure.
• PTC-Protected Power Distribution: Input distribution is protected at 9A PTC; output distribution circuits are individually protected at 2.5A PTC each. Positive Temperature Coefficient protection self-resets after a fault clears — no blown fuses to replace during a 2 a.m. service call. This is a meaningful operational difference versus fuse-based boards in high-availability facilities.
• Access Controller Relay Outputs — 28VAC or VDC @ 2.5A: The integrated relay outputs support both AC and DC loads at up to 28V and 2.5A, giving you flexibility to drive a range of lock types directly from the supply rather than wiring back to a separate relay board.
• UL294, cUL s319-05, and CE Listed: UL294 listing is the baseline requirement for access control power supplies on most commercial projects — specifiers and AHJs will ask for it. cUL covers Canadian installations under equivalent standards. CE marks the unit for European deployments. All three listings are factory-verified, not self-declared.
• 5A/250V Power Supply Fuse: The primary input fuse at 5A/250V provides upstream protection for the supply itself, isolating it from wiring faults before they reach the transformer or regulation circuitry.
• Steel Enclosure — 18