Emerson / Artesyn / Astec LPS255-CF Power Supply

The Emerson/Artesyn/Astec LPS255-CF is a 250 W component power supply engineered for OEM and system integrator integration. This chassis-mount unit delivers 24 V (adjustable 24–48 V) output with active power factor correction and built-in EMI filtration. The -CF suffix indicates an optional top-mounted fan cover requiring 30 CFM forced air cooling. Input accepts 85–264 Vac or 120–300 Vdc across 47–440 Hz. Designed for professional installation into larger systems, the LPS255-CF is not rated for convection cooling and not intended for standalone operation.

Technical Specifications

Output Power: 250 W @ 30 CFM forced air cooling

Output Voltage: 24 V nominal, adjustable 24–48 V (2:1 ratio)

Output Current: 10.4 A maximum; 0.32 A minimum load; 12.5 A peak

Input Voltage: 85–264 Vac; 120–300 Vdc

Input Frequency: 47–440 Hz

Efficiency: 75% typical at full load

Inrush Current: 20 A maximum, cold start @ 25 °C

Switching Frequency: 120 kHz

Hold-up Time: 20 ms @ 250 W load, 115 VAC nominal input

Safety Ground Leakage: < 0.5 mA @ 50/60 Hz, 264 Vac

Supervisory Outputs: 5 V @ 100 mA regulated; 12 V @ 500 mA

Key Features

Active power factor correction per IEC EN61000-3-2

EMI filtering meets FCC Class B, CISPR 22 Class B, EN55022 Class B, VDE 0878 PT3 Class B

Remote sense and remote inhibit capability

Single-wire current sharing support

Power fail signal (TTL logic, 50–150 ms response)

DC power good signal (TTL logic)

Overvoltage, overload, short-circuit, and thermal protection

RoHS and lead-free compliant

Typical Applications System integration, telecom equipment, industrial control systems, and distributed power architectures where forced-air cooling is available.

Compliance & Integration Approvals: VDE 60950, UL 60950, CSA 60950, NEMKO 60950, CB Certificate 2186, CE Mark (LVD). Dimensions: 262.0 mm L × 127.0 mm W × 50.8 mm H. EMC compliance must be verified at system level.