The Emerson/Artesyn/Astec LPT42 is a 40W open-frame AC-DC power supply engineered for ITE and medical applications requiring compact, reliable multi-output regulation. Operating from universal input (85–264 VAC or 120–300 VDC, 47–440 Hz), it delivers triple outputs: +5V @ 4A, +12V @ 2A, and –12V @ 0.5A under convection cooling; output capacity increases to 55W with 30 CFM forced air cooling. The unit occupies just 5.00″ × 3.00″ × 1.14″ (less than 1U height) and weighs approximately 8 oz, fitting space-constrained chassis designs.
## Technical Specifications
• **Input Specification:** 85–264 VAC or 120–300 VDC, 47–440 Hz
• **Output Voltages:** +5V, +12V, –12V (triple output configuration)
• **Output Current (Convection):** +5V @ 4A, +12V @ 2A, –12V @ 0.5A
• **Output Current (30 CFM Forced Air):** +5V @ 5A, +12V @ 2.5A, –12V @ 0.7A
• **Total Power Rating:** 40W (convection), 55W (forced air)
• **Efficiency:** 70%
• **Cross Regulation:** ±2% on +5V output; ±5% on +12V and –12V outputs
• **Main Output Adjustment Range:** –5% to +10%
• **Hold-up Time:** 20 ms @ 40W load, 115 VAC nominal
• **Overvoltage Protection:** 5.7–6.7 VDC on main output
• **Overload Protection:** Short-circuit protection on all outputs; case overload protection 110–145% above peak rating
• **Remote Sense:** Compensates for 0.5V lead drop minimum; operates without remote sense connected
• **Reverse Connection Protection:** Yes
• **Operating Temperature:** 0–50°C ambient (2.5% derating per °C from 50–70°C)
• **Start-up Temperature:** –20°C
• **Storage Temperature:** –40–85°C
• **Humidity:** 5–95% non-condensing
• **Vibration:** 0.75G peak, 5 Hz–500 Hz operational (three orthogonal axes, 1 oct/min sweep, 5 min dwell at resonances)
• **EMI Susceptibility:** IEC 801 Levels 2, 3, 4, 5, 6 compliant (Level 3)
## Key Features
• Compact 3″ × 5″ footprint, sub-1U height
• Universal AC or DC input acceptance
• Adjustable main output with remote sense capability
• Short-circuit and overload protection across all rails
• Reverse polarity protection
## Typical Applications
• Commercial information technology equipment (ITE)
• Medical device power
• Space-limited embedded systems
## Compatibility & Integration
• **Connectors:** Molex 09-50-8031 (USA) or 09-91-0300 (UK) AC input; Molex 09-50-806 DC output
• **Certifications:** CB, CE, UL2601, CSA 22.2 No. 601.1
• **Mounting:** Chassis mount
