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Phoenix Contact 2866750 QUINT POWER 24V 5A DIN Rail Power Supply with SFB Technology

Brand PHOENIX CONTACT

Model Number 2866750

UPC 013227271337

Manufacture Warranty

EpicRise Warranty 1 Year

Product Highlights

• SFB technology delivers six times the nominal current (30A) for 12ms to selectively trip circuit breakers, isolating faults without system-wide shutdown

• POWER BOOST provides 7.5A (150% nominal current) for reliable starting of heavy loads and inductive equipment

• Preventive function monitoring reports critical operating states before failures occur, maximizing uptime

• Wide 85-264V AC input range with >30ms power failure bridging ensures stable operation across global power grids

• Compact 40mm housing with >1.1 million hour MTBF fits tight control cabinet spaces while delivering industrial-grade reliability

Overview
Specifications
FAQ
User Guides
Reviews

The Phoenix Contact 2866750 QUINT POWER is a primary-switched DIN rail power supply engineered for industrial control systems requiring selective fault protection and reliable heavy-load starting. Delivering 24V DC at 5A (120W) with adjustable output from 18-29.5V, this unit combines SFB (Selective Fuse Breaking) technology with POWER BOOST capabilities to maintain system availability while isolating electrical faults.

Built for control cabinet installations, the 2866750 accepts 85-264V AC input (or 90-350V DC) with 90% efficiency and features preventive monitoring that alerts operators to degrading conditions before failures occur. The pluggable screw terminal design and slim 40mm width simplify integration into existing and new automation systems. This model is being superseded by Phoenix Contact 2904600 QUINT4-PS/1AC/24DC/5 for new projects.

Best For

This power supply serves industrial automation environments where fault isolation and load flexibility are critical to continuous operation.

- Machine control cabinets requiring selective circuit breaker coordination to isolate faults in specific load branches without shutting down unaffected circuits

- Process control systems with solenoid valves, contactors, and motor starters needing POWER BOOST current to reliably energize inductive loads during startup

- Manufacturing lines where preventive monitoring alerts maintenance teams to declining input voltage, overload conditions, or thermal stress before production stops

- Global installations spanning regions with unstable grid power, utilizing the 85-264V AC input range and >30ms bridging to ride through voltage sags

- Retrofit projects upgrading legacy 24V DC systems in tight panels, leveraging the 40mm slim housing to add modern SFB protection without panel redesign

Key Features

- Selective Fuse Breaking (SFB) technology trips standard Type B circuit breakers magnetically with 30A/12ms pulses, enabling zone-selective fault clearance

- POWER BOOST static reserve delivers 7.5A continuously (150% of nominal 5A rating) to handle capacitive charging and inductive motor loads without voltage droop

- Preventive function monitoring with relay output (DC OK) signals when output voltage drops below 90% nominal, triggering alarms before critical undervoltage conditions

- Wide input voltage range (85-264V AC, 45-65Hz or 90-350V DC) operates across international power standards without derating or voltage selection switches

- Adjustable output voltage (18-29.5V DC, ±1% regulation) compensates for voltage drop in long cable runs or tunes voltage for specific load requirements

- Power failure bridging >30ms at both 120V AC and 230V AC input maintains output during momentary grid interruptions typical in industrial environments

- Compact 40mm width DIN rail mount (NS 35) with pluggable screw terminals (0.2-2.5mm² / AWG 20-12) fits standard control cabinet layouts

- High efficiency (90% at 230V AC) reduces heat dissipation to 15W at full load, minimizing thermal stress and cooling requirements in enclosed cabinets

Quick Specs

Specification	Value
Input Voltage	85-264V AC (45-65Hz) or 90-350V DC
Output Voltage	24V DC ±1% (adjustable 18-29.5V DC)
Output Current (Nominal)	5A
Output Current (POWER BOOST)	7.5A continuous
Output Power	120W
SFB Current Capability	30A for 12ms
Efficiency	90% at 230V AC
Ripple Voltage	<40mV peak-to-peak
Power Failure Bridging	>30ms at 120V AC and 230V AC
MTBF	>1,134,000 hours
Operating Temperature	-25°C to +70°C (derating >60°C)
Dimensions (W × H × D)	40 × 130 × 125 mm
Weight	0.7 kg
Mounting	DIN rail NS 35
Protection Rating	IP20
Connection Type	Pluggable screw terminals (M3, 0.5-0.6Nm torque)
Status Indication	DC OK (green LED), BOOST (yellow LED)
Relay Output	DC OK floating contact (≤30V AC/DC, ≤20mA)

What industrial environments is the Phoenix Contact 2866750 best suited for?

The 2866750 is designed for control cabinets and machinery requiring selective fault protection and heavy-load starting. Its SFB technology makes it ideal for multi-branch DC systems where isolating individual faults without shutting down the entire system is critical. The wide input voltage range and power failure bridging handle unstable grid conditions common in manufacturing facilities.

How does the 2866750 compare to the newer QUINT4-PS model 2904600?

Phoenix Contact has designated model 2904600 as the successor for new projects. The 2866750 remains available for existing system expansions and replacements where matching installed equipment is required. Both models share core QUINT POWER features including SFB technology and POWER BOOST, but system designers should specify the 2904600 for new installations.

Is the 120W output capacity cost-effective for smaller control panels?

The 5A/120W rating suits control panels with moderate DC loads like PLCs, I/O modules, small contactors, and indicator lights. Its value comes from SFB fault isolation and POWER BOOST capabilities rather than raw wattage—facilities paying for downtime prevention benefit more than those needing only basic 24V conversion. Panels drawing under 3A continuously may find lower-capacity units more economical.

What DC distribution systems work with the 2866750's SFB technology?

The SFB 30A/12ms output requires standard Type B circuit breakers (6A, 10A, or 16A ratings as recommended) on branch circuits for selective tripping. It operates in 24V DC systems using screw terminals for 0.2-2.5mm² (AWG 20-12) wire. The unit accepts single-phase AC or DC input, making it compatible with global industrial power infrastructure from 85-264V AC or 90-350V DC sources.

What is the actual operational temperature range before derating is required?

The unit operates from -25°C to +70°C. Above 60°C ambient temperature, output current must be derated according to Phoenix Contact derating curves to maintain reliability. Full 5A output is available from -25°C to +60°C without restrictions.

How long can the POWER BOOST current of 7.5A be sustained?

The POWER BOOST delivers 7.5A continuously, not as a time-limited surge. This is 150% of the nominal 5A rating and is designed for permanent operation with heavy inductive or capacitive loads. The yellow BOOST LED illuminates whenever output current exceeds the 5A nominal rating.

What is the function of the DC OK relay output?

The DC OK relay provides a floating contact that closes when output voltage exceeds 90% of nominal (21.6V for 24V setting). It handles up to 30V AC/DC at 20mA maximum, suitable for driving PLC inputs or alarm circuits. The contact opens and the green LED flashes when output voltage drops below the 90% threshold, providing early warning of impending power failure.

Can the output voltage be adjusted while the unit is operating under load?

The output voltage adjustment range (18-29.5V DC) is accessible via the front panel potentiometer. While the technical documentation does not explicitly prohibit live adjustment, best practice is to adjust output voltage during installation or maintenance windows rather than under full load to avoid transient voltage fluctuations affecting sensitive equipment.