Phoenix Contact 2902999 UNO-PS/1AC/12DC/55W – 12 V DC, 4.6 A Power Supply
The Phoenix Contact 2902999 (UNO-PS/1AC/12DC/55W) is a compact, single-phase, primary-switched DIN rail power supply from the Phoenix Contact UNO POWER range. It delivers 12 V DC at 4.6 A (55 W) in a housing only 35 mm wide and 90 mm high, designed for small control boxes and installation distribution boards. UNO POWER offers the basic functions in a very small footprint, with high efficiency and very low no-load losses of under 0.3 W.
What the Part Number Means
- 2902999 – Phoenix Contact order number
- UNO-PS – UNO POWER power supply
- 1AC – Single-phase AC input
- 12DC – 12 V DC output
- 55W – 55 W output power (4.6 A at 12 V)
Key Features
- Very compact: 35 × 90 × 84 mm, fits in shallow control boxes and distribution boards
- Low losses: no-load power consumption under 0.3 W
- Long mains buffering at 230 V AC: over 90 ms
- Short-circuit proof: HICCUP output characteristic
- Wide input range: 85–264 V AC for use on networks worldwide
- Hazardous locations: Class I, Division 2 approval
Key Specifications (Phoenix Contact 2902999 Datasheet)
Input
- Nominal input voltage: 100–240 V AC
- Input voltage range: 85–264 V AC, 50/60 Hz
- Input current: typ. 1.3 A at 100 V AC / typ. 0.6 A at 240 V AC
- Inrush current: <30 A (typical)
- Mains buffering: >20 ms at 120 V AC / >90 ms at 230 V AC
- Internal input fuse: 2 A, slow-blow
- Recommended circuit breaker: 6–16 A (characteristic B, C, D or K)
Output
- Nominal output voltage: 12 V DC
- Nominal output current: 4.6 A (-25 °C to +55 °C)
- Output power: 55 W
- Efficiency: typ. 88% at 230 V AC / typ. 87% at 120 V AC
- Residual ripple: <30 mVpp
- Overvoltage protection: ≤25 V DC
- Short-circuit proof (HICCUP characteristic)
- No-load power consumption: <0.3 W
- Parallel connection for redundancy or higher capacity, and series connection, both possible
Signalling
- Status LED
General Data
- Connection: screw connection (M3), 0.2–2.5 mm² (AWG 24–14)
- Mounting: DIN rail NS 35, horizontal; 0 mm clearance left and right, 30 mm top and bottom
- Degree of protection: IP20
- Protection class: II (in closed control cabinet)
- MTBF (IEC 61709, SN 29500): >865,000 h at 40 °C
- Ambient temperature (operation): -25 °C to +70 °C, derating 2.5%/K above +55 °C
- Storage temperature: -40 °C to +85 °C
- Dimensions (W × H × D): 35 × 90 × 84 mm
- Weight: approx. 214 g
Approvals and Standards
- UL Listed (UL 508) and UL/cUL Recognized (UL 60950-1)
- Class I, Division 2, T4A (hazardous locations)
- IECEE CB Scheme, EAC
- SEMI F47 (180 V AC)
- IEC 62368-1 (SELV), EN 61558-2-16
Typical Applications
- 12 V DC supply in small control boxes and distribution boards
- Building automation, access control and signalling
- Small 12 V sensors, relays, communication modules and lighting
- Direct replacement of 2902999 units in existing installations
Buy the Phoenix Contact 2902999 from Atlantech Drives
Atlantech Drives supplies the Phoenix Contact 2902999 UNO-PS/1AC/12DC/55W with fast worldwide shipping and a 12-month warranty. Our experienced sales team can also quote other UNO, TRIO and QUINT power supplies. Request a quote today for price and availability.
