PHOENIX CONTACT QUINT-PS/1AC/48DC/5 Original Spare QUINT Compatible

Product Overview

PHOENIX CONTACT QUINT-PS/1AC/48DC/5 2866679: System Stability & Industrial Spare Maintenance Value

The PHOENIX CONTACT QUINT-PS/1AC/48DC/5 (Part No. 2866679) is a proven DIN-rail mounted primary-switched power supply from the renowned QUINT Series, delivering a regulated 48 VDC / 5 A (240 W) output from a wide-range 100–240 VAC single-phase input. Engineered for continuous duty in demanding industrial environments, this unit is a cornerstone component in control cabinets, PLC power distribution panels, and DCS auxiliary power circuits across manufacturing, process automation, energy, and infrastructure sectors.

When a QUINT-PS/1AC/48DC/5 fails or approaches end-of-service life, the downstream impact is immediate: 48 VDC field devices lose power, I/O modules go offline, and the entire control loop is interrupted. Sourcing a verified original replacement unit — rather than an unqualified substitute — is the fastest path back to full system availability. TOPNLMS stocks this unit as a genuine original spare, pre-tested before shipment, and backed by a 12-month warranty.

Critical Technical Specs

Preventive Maintenance Strategy

A structured preventive maintenance program for any 48 VDC control cabinet should treat the QUINT-PS/1AC/48DC/5 as the anchor component — but it should never be inspected in isolation. During scheduled shutdowns or annual cabinet inspections, maintenance teams should simultaneously evaluate all components that share the same power rail or control loop.

Begin with the QUINT-PS/1AC/24DC/10 or QUINT-PS/1AC/24DC/20 units if your cabinet also supplies 24 VDC auxiliary circuits — these QUINT Series siblings share the same DIN-rail footprint and failure modes, and a simultaneous replacement during a planned outage eliminates a second unplanned shutdown later. Inspect the QUINT-DIODE/40AC/2X20/1X40 redundancy module if the 48 VDC rail is configured in a redundant power architecture; a degraded diode module can mask a failing primary supply until both fail simultaneously.

Check the PHOENIX CONTACT CLIPLINE terminal blocks (such as the ST 2.5 or UK 5N series) on the output side of the power supply. Loose or corroded terminal connections are a leading cause of intermittent 48 VDC dropouts that are often misdiagnosed as power supply failure. While the cabinet is de-energized, inspect and torque all output terminals to specification.

For systems using PHOENIX CONTACT IB IL 48 DI 16 or IB IL 48 DO 16 Inline I/O modules powered from this 48 VDC bus, verify that module bus connectors are fully seated and that no module shows signs of overheating or discoloration. A single failed I/O module drawing excess current can stress the QUINT-PS/1AC/48DC/5 and shorten its service life. Similarly, inspect any PSR safety relays or PLC-RSC relay modules in the same cabinet — relay coil failures can create abnormal load spikes on the 48 VDC supply.

If the system includes PHOENIX CONTACT FL SWITCH or FL COMSERVER communication modules on the 48 VDC rail, verify firmware versions and check for abnormal current draw, which can indicate a failing Ethernet switch or serial gateway. Communication module failures are frequently overlooked during power supply troubleshooting but are a common co-failure in aging control cabinets.

Finally, inspect the TRABTECH surge protection devices (such as the VAL-MS 48DC series) installed on the 48 VDC bus. A surge arrester that has absorbed multiple transient events may appear functional but no longer provides adequate protection — replacing it proactively during the same maintenance window costs far less than a subsequent power supply failure caused by an unprotected surge event.

Strategic Replacement Solutions

The QUINT-PS/1AC/48DC/5 (2866679) is a direct form-fit-function replacement for earlier QUINT Series 48 VDC / 5 A units. Its DIN-rail mounting dimensions, terminal layout, and output voltage adjustment range are fully compatible with existing cabinet cutouts and wiring harnesses, meaning no mechanical modification is required during a field swap. This is critical in legacy system environments where cabinet space is fixed and rewiring is not an option.

For facilities managing aging QUINT-PS units that are approaching 10–15 years of service, a proactive replacement strategy — rather than a reactive break-fix approach — delivers measurable ROI. A single unplanned production stoppage caused by a power supply failure typically costs far more in lost output, emergency labor, and expedited freight than a planned replacement during a scheduled maintenance window. Maintaining one or two QUINT-PS/1AC/48DC/5 units in your on-site spare parts inventory eliminates this risk entirely.

TOPNLMS supplies this unit as a genuine original spare, sourced through verified industrial distribution channels. Each unit undergoes output voltage, ripple, and load regulation testing prior to shipment. Orders are processed within 1–2 business days, with international express shipping available to minimize lead time for urgent maintenance requirements.

Support FAQ

Q1: Is this unit a genuine original PHOENIX CONTACT product or an aftermarket replacement?
This is a genuine original PHOENIX CONTACT QUINT-PS/1AC/48DC/5 (Part No. 2866679), not an aftermarket or compatible substitute. It is sourced through verified industrial supply channels and is covered by a 12-month TOPNLMS warranty.

Q2: What pre-shipment testing is performed on this power supply?
Each unit is tested for output voltage accuracy, load regulation under rated current (5 A), and output ripple before dispatch. A functional test report is available upon request for critical maintenance applications.

Q3: Can this unit directly replace an older QUINT-PS/1AC/48DC/5 without cabinet modifications?
Yes. The QUINT-PS/1AC/48DC/5 (2866679) maintains the same DIN-rail mounting footprint, terminal positions, and output voltage range as previous QUINT Series 48 VDC / 5 A variants. No mechanical or wiring modifications are required for a direct field replacement.

Q4: What is the recommended spare parts inventory strategy for this model?
For facilities with multiple 48 VDC control cabinets or critical continuous-process applications, we recommend maintaining a minimum of one QUINT-PS/1AC/48DC/5 unit per site as a cold standby spare. For high-availability systems with redundant power architectures, a hot standby unit paired with a QUINT-DIODE redundancy module is the preferred configuration. Contact our technical team for site-specific spare parts planning support.