3 Year Warranty

Approvals: 

Specification

PRODUCT NUMBER

LTEF800-S240 

LTEF800-S270 

LTEF800-S480 

OUTPUT 

DC Output 

24V 

27V 

48V 

Rated Current (100~127Vac) 

27A 

23A

14A 

Rated Current (128~264Vac) 

33A 

29A 

16.5A 

Ripple and Noise Note 2 

≤200mV 

≤200mV 

≤200mV 

Voltage ADJ.  Range 

-5%~+10% of rated output voltage 

Voltage Accuracy  

±2% 

Line Regulation 

±0.5% 

Load Regulation 

±2% 

Set-up Time 

≤3S (220Vac input, Full load) 

Hold up Time  

≥8mS (220Vac input, Full load) 

Temperature Coefficient

±0.03%/°C 

Overshoot and Undershoot 

<5.0% 

INPUT 

Voltage Range    

90Vac~264Vac,127Vdc~370Vdc 

Frequency Range 

47Hz--63Hz 

Power Factor (Typical) 

PF≥0.96/230VAC     PF≥0.98/115VAC     Full Load 

Efficiency (Typical) 

≥89% 

≥89% 

≥89% 

AC Current (max.) 

≤12 A

Inrush Current (Typical) 

≤20A@220Vac       Cold start 

Leakage Current 

 Input—output: ≤0.25mA  Input— PG: ≤3.5mA 

PROTECTION 

Over Load 

110%~135% of rated output current, constant current, auto recovery 

Over power 

110%~135% of rated output power, constant current, auto recovery 

Over Temperature 

105°C+5°C(detect on Mosfet temperature); shut down, auto recovery after the temperature goes down to 70°C 

Over Voltage 

110%~150% of rated output voltage, constant voltage, auto recovery 

Short Circuit 

Long-term mode, constant current, auto recovery  

ENVIRONMENT 

Operating amb. Temp. & Hum. 

-30°C~70°C; 20%~90% RH  No condensing  (refer to derating curve) 

Storage Temp. & Hum. 

-40°C~85°C; 10%~95% RH  No condensing 

SAFETY &EMC   

(Note 3) 

Safety Standards 

UL60950-1 2nd Ed; IEC 60950-1:2005(2nd Ed); EN60950-1:2006 

Withstand Voltage 

Primary-Secondary:3.0KVac; ≤10mA .Primary-PG:1.5KVac; ≤10mA. Secondary-PG:0.5KVac; ≤10mA. 

Isolation Resistance 

10M ohms  

EMI Conduction & Radiation 

Compliance to EN55022, Class B 

Harmonic Current 

Compliance to EN61000-3-2, Class D 

EMS Immunity 

Compliance to EN61000-4-2,3,4,5,6,8,11; heavy industry level 

OTHERS 

MTBF (MIL-HDBK-217F) 

More than 200,000Hrs (25°C, Full load) 

Dimension (L*W*H) 

226x116.5x41 mm 

Packing 

6PCS/CTN, 8.9KGS, 0.04CBM 

Cooling method 

Fored air cooling (Built-in fan, the fan speed is controlled by load and internal temp.)  

NOTE 

1. All parameters NOT specially mentioned are measured at rated input, rated load and 25°C of ambient temperature. 
2. Measured at 20MHz of bandwidth by using a 12€ twisted pair-wire terminated with a 0.1 uF & 47uF parallel capacitor. 
3. The power supply is considered as a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives. For guidance on how to perform these EMC tests, please refer to EMI testing of component power supplies€ on MEPOS website 

Block Diagram

Derating Curve

Mechanical Specification