Phoenix Contact QUINT-PS/1AC/24DC/10 Power Supply

The Phoenix Contact QUINT-PS/1AC/24DC/10 is a 240 W single-phase DIN-rail switched-mode power supply providing regulated 24 V DC at 10 A continuous from a 100–240 V AC input, with the signature QUINT SFB (Selective Fuse Breaking) technology that distinguishes it from all other DIN-rail power supplies in the 24 V DC segment. SFB technology delivers up to 500% of rated current (50 A from a 10 A supply) for 12 milliseconds when a capacitive load or short-circuit is detected — providing sufficient current to blow a standard 10 A IEC 60269 gL fuse or trip a C-curve IEC 60898 MCB in the downstream faulted circuit, then recovering automatically to normal operation within 25 milliseconds. This active fuse-breaking function enables selective fault clearance without a dedicated pre-fuse device between the PSU and each branch circuit, simplifying BOM and panel design for Saudi DCS and PLC marshalling panels where multiple individual branch circuits are each fused for protection selectivity.

The QUINT-PS output regulation holds ±1% under all load transients and the full operating temperature range, and the output is adjustable from 18 V to 29.5 V via a front-panel trimmer to compensate for cable-resistance voltage drop on long 24 V DC runs to remote Saudi field panels and junction boxes. The QUINT-PS incorporates a DC OK relay with a 24 V DC bus status output and a parallel redundancy diode (ORing) input that allows two QUINT-PS units to be connected in parallel via the ORing diodes without a separate ORing module — when one supply fails, the remaining unit picks up the full load without any interruption to the connected instruments. This N+1 redundant operation meets Saudi Aramco's requirements for uninterruptible 24 V DC power to safety-instrumented system (SIS) loops, fire and gas (F&G) detection system sensors, and emergency shutdown (ESD) actuator solenoids, where any power interruption constitutes a trip-demand on the SIS.

The QUINT-PS/1AC/24DC/10 is the dominant 24 V DC industrial power supply in Saudi Arabia's EPC instrumentation sector, specified by major Saudi EPC engineering houses as the default PSU for ARAMCO FEED and detailed engineering packages due to the SFB technology's unique selective protection capability and the QUINT-PS's 25-year track record in Saudi process plant instrumentation panels. SABIC's engineering standards for DCS and safety system power supply sections in Jubail and Yanbu plants specify the QUINT-PS or equivalent with SFB capability as the primary 24 V DC source, acknowledging that conventional constant-current limiting PSUs cannot provide adequate downstream fuse selectivity in complex multi-branch marshalling sections. The NEOM smart-city BMS and automation panels across Sharma, NEOM Bay, and OXAGON specify QUINT-PS as the 24 V DC source for smart-building control and monitoring systems.

Razz Middle East maintains comprehensive QUINT-PS stock — 5 A, 10 A, 20 A, and 40 A variants — in Riyadh and Jeddah, with same-day dispatch for orders received before 2 PM. Our team provides complete QUINT-PS application support for Saudi EPC contractors: 24 V DC load-budget calculations per ARAMCO SAES-J-901, SFB fuse-coordination studies confirming which fuse types and ratings will reliably blow within the 12 ms SFB pulse window, redundant-pair parallel ORing configuration design, and DC OK relay integration schematics for DCS alarm wiring. All QUINT-PS/1AC/24DC/10 supplies include Phoenix Contact CE declarations, IEC 61558-2-16 certificates, UL 508 listed documentation, and SASO import conformity for Saudi Customs.