LEC120-24

## LEC120 Series 

120 W AC-DC DIN Rail Switching Power Supply 

LEC120 Series is Bel Power Solutions AC-DC converter series featuring a cost-effective, energy efficient explosion proof solution for standard DIN-rail mounting. The products offer a high level of stability and immunity to noise, compliant with international IEC 62368-1 standards for EMC and safety specifications meet IEC/EN/UL 62368, UL 61010, UL 508. 

These light weight AC-DC converters also have an extremely compact design for space saving and are ideal for applications as industrial control equipment, machinery and variety of harsh environment applications. 

## **FEATURES** 

- Input voltage 85 - 264 VAC (universal) or 120 - 370 VDC 

- Output voltage 12 V, 24 V, 48 V (adjustable) 

- Operating ambient temperature range -40°C to +70°C 

- Efficiency up to 94% 

- High reliability 

- DC OK function 

- Active PFC 

- 150% peak load output for 3 seconds 

- DC ON output status indicator LED 

- Output short circuit, over-current, over-voltage & over-temperature protection 

**==> picture [29 x 9] intentionally omitted <==**

**----- Start of picture text -----**<br>
RoHS<br>**----- End of picture text -----**<br>


- Meets the requirements of IEC/EN/UL 62368-1, UL 61010, UL 508 

- Dimensions 32 x 124 x 110 mm (1.26 x 4.88 x 4.33 in) 

## **APPLICATIONS** 

- Industrial control equipment 

- Machinery 

- Harsh environment applications 

**belfuse.com/power-solutions** 

LEC120 Series 

2 

## **1. MODEL SELECTION** 

**==> picture [511 x 104] intentionally omitted <==**

**----- Start of picture text -----**<br>
MAX.<br>INPUT VOLTAGE  OUTPUT  MAX OUTPUT  MAX OUTPUT<br>MODEL EFFICIENCY [ 1] CAPACITIVE<br>RANGE  VOLTAGE  CURRENT  POWER  [2]<br>LOAD<br>85 - 264 VAC<br>LEC120-12 12 V 10 A 93.5 % 80 000 µF  120 W<br>(120 - 370 VDC)<br>85 - 264 VAC<br>LEC120-24 24 V 5 A 94 % 50 000 µF  120 W<br>(120 - 370 VDC)<br>85 - 264 VAC<br>LEC120-48 48 V 2.5 A 94 % 30 000 µF 120 W<br>(120 - 370 VDC)<br>**----- End of picture text -----**<br>


- 1 Typical, at 230 VAC input 

2  See DERATING CURVES on page 4 

## **2. INPUT SPECIFICATIONS** 

All specifications are measured at Ta = 25°C, humidity <75 % nominal input voltage and rated output load unless otherwise specified. 

**==> picture [510 x 160] intentionally omitted <==**

**----- Start of picture text -----**<br>
PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>Rated 100 240 VAC<br>Input voltage AC Input 85 264 VAC<br>DC Input 120 370 VDC<br>Input frequency 47 63 Hz<br>115 VAC 1.5<br>Input current A<br>230 VAC 0.75<br>115 VAC 15<br>Inrush current A<br>230 VAC 30<br>115 VAC 0.98<br>Power factor<br>230 VAC 0.94<br>Start-up delay time 230 VAC 300 1000 ms<br>Leakage current 240 VAC 1 mA<br>**----- End of picture text -----**<br>


## **3. OUTPUT SPECIFICATIONS** 

All specifications are measured at Ta = 25°C, humidity <75 % nominal input voltage and rated output load unless otherwise specified. 

**==> picture [511 x 213] intentionally omitted <==**

**----- Start of picture text -----**<br>
PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>LEC120-12 11.8 14.0<br>Adjustable output voltage  [3] LEC120-24 23.5 28.0 VDC<br>LEC120-48 48.5 53.0<br>LEC120-12 10<br>Output current LEC120-24 5 A<br>LEC120-48 2.5<br>Output voltage accuracy At full load range ± 1 %<br>Line regulation Rated load ± 0.5 %<br>Load regulation 0% - 100% load ± 1 %<br>LEC120-12 / LEC120-24 100<br>Ripple & noise [ 4] mVpp<br>LEC120-48 200<br>Stand-by<br>2 W<br>power consumption<br>Hold-up time 20 ms<br>Switching frequency 100 kHz<br>DC-OK signal [ 5] 30 VDC / 1 A max.<br>**----- End of picture text -----**<br>


- 3  The output voltage can be adjusted by the output adjustable resistance ADJ, turn clockwise. 

4  Measured with 20 MHz bandwidth, output parallel 47 µF electrolytic capacitor and 0.1 µF ceramic capacitor. 

5  When the output voltage is normal, the relay is connected. As soon as the output voltage dips below 90% Vo, the relay is disconnected. 

**==> picture [123 x 43] intentionally omitted <==**

tech.support@psbel.com **belfuse.com/power-solutions** 

LEC120 Series 

3 

## **4. PROTECTIONS** 

**==> picture [511 x 118] intentionally omitted <==**

**----- Start of picture text -----**<br>
PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>Constant current up to 1s, after 1s Hiccup mode applied.<br>Short circuit protection<br>Auto recovery. Recovery time < 10s after the SC disappear.<br>Normal / high temperature: auto recovery 105 200<br>Over current protection [ 6] % Io<br>Low temperature: respecting derating rules in Fig. 1, auto recovery 105<br>LEC120-12 18<br>Over voltage protection Hiccup mode, auto recovery LEC120-24 35  V<br>LEC120-48 60<br>OTP start  90<br>Over temperature protection [ 7] °C<br>OTP release (auto recovery) 60<br>**----- End of picture text -----**<br>


6  230 VAC, rated load. Constant current up to 1s, after 1s Hiccup mode applied. 

7  230 VAC, 70% load 

## **5. ENVIRONMENTAL SPECIFICATIONS** 

**==> picture [511 x 151] intentionally omitted <==**

**----- Start of picture text -----**<br>
PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>Operating temperature -40 +70 °C<br>Storage temperature -40 +85 °C<br>-40°C to -25°C 3.34<br>Temperature derating +55°C to +70°C (85 - 164 VAC) 2.0 %/°C<br>+60°C to +70°C (165 - 264 VAC) 3.0<br>Input voltage derating AC Input voltage between 85 - 100 VAC /120 - 140 VDC 0.67 %/VAC<br>Operating, non-condescending 95<br>Humidity %RH<br>Storage, non-condescending 20 95<br>Operating 2000 m<br>Altitude<br>Derating of 5°C / 1000 m for operating altitude > 2000 m<br>MTBF MIL-HDBK-217F @ 25 °C 300 000 hrs<br>**----- End of picture text -----**<br>


## **6. EMC SPECIFICATIONS** 

**==> picture [511 x 143] intentionally omitted <==**

**----- Start of picture text -----**<br>
PARAMETER DESCRIPTION / CONDITIONS CLASS / LEVEL / CRITERION<br>Conducted emissions EN 55032 / CISPR 32  Class B<br>Radiated emissions EN 55032 / CISPR 32  Class B<br>Harmonic current IEC/EN 61000-3-2    Class A & Class D<br>ESD immunity IEC/EN 61000-4-2,    Contact ±6 kV / Air ±8 kV Performance Criterion A<br>Radiated field immunity IEC/EN 61000-4-3,    10 V/m Performance Criterion A<br>Electrical fast transient IEC/EN 61000-4-4,    ± 4 kV Performance Criterion A<br>Surge immunity IEC/EN 61000-4-5,    Line to line ±2 kV / Line to ground ±4 kV Performance Criterion A<br>Conducted immunity IEC/EN 61000-4-6,    10 VRMS Performance Criterion A<br>Voltage dips, interruptions IEC/EN 61000-4-11,   0%, 70% Performance Criterion B<br>**----- End of picture text -----**<br>


**==> picture [123 x 43] intentionally omitted <==**

**Asia-Pacific EMEA North America** +86 755 298 85888 +353 61 49 8941 +1 866 513 2839 **belfuse.com/power-solutions** 

© 2021 Bel Power Solutions & Protection                    BCD.20173_A   29 September 2021 

LEC120 Series 

4 

## **7. SAFETY SPECIFICATIONS** 

**==> picture [511 x 90] intentionally omitted <==**

**----- Start of picture text -----**<br>
PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>Safety standards & approvals Meets the requirements of EN 62368-1, UL 61010-1, UL 508<br>Safety class Class I<br>Input to Ground 1500<br>Isolation test [ 8] Input to Output 3000 VAC<br>Output to Ground 500<br>Insulation resistance At 500 VDC 50 MΩ<br>**----- End of picture text -----**<br>


8  Electric strength test for 1 min., leakage current <15 mA 

## **8. MECHANICAL SPECIFICATIONS** 

**==> picture [511 x 81] intentionally omitted <==**

**----- Start of picture text -----**<br>
PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>32 x 124 x 110  mm<br>Dimensions<br>1.26 x 4.88 x 4.33 in<br>Weight 490 ± 10% g<br>Case [ 9] Material: Metal (AL1100, SPCC) and Plastic (PC940)<br>Cooling Convection (Natural air flow)<br>**----- End of picture text -----**<br>


9  When the power supply is in use, the enclosure of the product needs to be connected to the system grounding. 

## **9.  DERATING CURVES** 

**==> picture [202 x 157] intentionally omitted <==**

**----- Start of picture text -----**<br>
g<br>100<br>115 VAC<br>70<br>Input Voltage: 230 VAC<br>85 - 264 VAC<br>50<br>120 - 370 VDC<br>-40 -25 55 60 70<br>Ambient Temperature [°C]<br>Output Power [%]<br>**----- End of picture text -----**<br>


Figure 1. Temperature Derating Curve 

**==> picture [229 x 154] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>95 LEC120-48<br>LEC120-24<br>90 LEC120-12<br>85<br>80<br>75<br>70<br>65<br>60<br>85 115 230 264<br>Input Voltage [VAC]<br>Efficiency [%]<br>**----- End of picture text -----**<br>


Figure 3. Efficiency vs Input Voltage Derating Curve (Full Load) 

**==> picture [241 x 319] intentionally omitted <==**

**----- Start of picture text -----**<br>
100<br>90<br>Ambient Temperature:25°C<br>85 100 264 VAC<br>120 140 370 VDC<br>Input Voltage<br>Figure 2. Input Voltage Derating Curve<br>100<br>95 LEC120-48<br>LEC120-24<br>90 LEC120-12<br>85<br>80<br>75<br>70<br>65<br>60<br>10 25 40 50 65 75 90 100<br>Output Current [%]<br>Output Power [%]<br>Efficiency [%]<br>**----- End of picture text -----**<br>


Figure 4. Efficiency vs Output Load Derating Curve (Vi = 230 VAC) 

**==> picture [123 x 43] intentionally omitted <==**

tech.support@psbel.com 

**belfuse.com/power-solutions** 

LEC120 Series 

5 

## **10.  MECHANICAL DRAWINGS** 

All dimensions are in mm [in] General tolerance ±1.00 mm [±0.039 in] Wire range 26-10 AWG Tightening torque max. 0.4 Nm Mounting DIN Rail TS35 (rail needs to be connected to safety ground) 

**==> picture [496 x 364] intentionally omitted <==**

**----- Start of picture text -----**<br>
Top View<br>General tolerance ±1.00 mm [±0.039 in]<br>Wire range 26-10 AWG<br>Tightening torque max. 0.4 Nm<br>Mounting DIN Rail TS35<br>(rail needs to be connected to safety ground)<br>110.00 [4.331] 6.35 [0.250]<br>4 3 2 1<br>DC ON<br>ADJ<br>DC OK<br>Side View Front View PIN FUNCTION<br>1 -Vo<br>OUTPUT   2 -Vo<br>TERMINAL 3 +Vo<br>4 +Vo<br>5 6 7 5 AC (N)<br>INPUT<br>TERMINAL 6 AC (L)<br>7<br>GROUNDING<br>118.90 [4.681] 6.35 [0.250] SCREW *<br>DC ON LED Output status indicator<br>(green)<br>ADJ Output adjustable resistor<br>DC OK SIGNAL Monitors the output voltage<br>on the output terminals<br>* Pin 7 and the grounding screw are interconnected.<br>Bottom View Grounding screw   Either Pin 7 or the grounding screw need to be<br>  connected to earth.<br>32.00 [1.260]<br>124.00 [4.882]<br>128.82 [5.072]<br>**----- End of picture text -----**<br>


Figure 5. Mechanical Drawing 

**NUCLEAR AND MEDICAL APPLICATIONS** - Products are not designed or intended for use as critical components in life support systems, equipment used in hazardous environments, or nuclear control systems. 

**TECHNICAL REVISIONS** - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date manufactured. Specifications are subject to change without notice. 

**==> picture [123 x 43] intentionally omitted <==**

**Asia-Pacific EMEA North America** +86 755 298 85888 +353 61 49 8941 +1 866 513 2839 

**belfuse.com/power-solutions** 

© 2021 Bel Power Solutions & Protection                    BCD.20173_A   29 September 2021