LEN120-48

## LEN120 Series 

120 W AC-DC DIN Rail Switching Power Supply 

LEN120 Series is Bel Power Solutions AC-DC converter series featuring a cost-effective, energy efficient green power supply solution for standard DIN-rail mounting. The products offer a high level of stability and immunity to noise for industrial control equipment, machinery, and other industrial equipment in a variety of harsh environments. 

These light weight AC-DC converters have an extremely compact design and the standard rail (35 mm) installation for space saving. With good EMC performance, compliant with international UL 61010-1, UL 508, EN 62368-1 standards for EMC and safety. 

## **FEATURES** 

- Input voltage 90 - 264 VAC (universal) or 127 - 370 VDC • Output voltage 12 V, 24 V, 48 V (adjustable) 

- Operating ambient temperature range -20°C to +60°C 

- High I/O isolation test voltage up to 4000 VAC 

- Low ripple & noise 

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

- DIN rail TS-35/7.5 or 15 mountable 

- Ultra slim design with 36 mm width suitable for small chassis and narrow space installation 

- Safety certified according to EN 62368-1, meets the requirements of UL 61010-1, UL 508 

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- Dimensions 36 x 125 x 100 mm (1.42 x 4.92 x 3.94 in) 

## **APPLICATIONS** 

- Industrial control equipment 

- Machinery 

- Harsh environment applications 

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LEN120 Series 

2 

## **1. MODEL SELENTION** 

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MAX.<br>INPUT VOLTAGE  OUTPUT  MAX OUTPUT  MAX OUTPUT<br>MODEL EFFICIENCY [ 1] CAPACITIVE<br>RANGE  VOLTAGE  CURRENT  POWER [ 2]<br>LOAD<br>90 - 264 VAC<br>LEN120-12 12 V 10 A 85 % 3000 µF  120 W<br>(127 - 370 VDC)<br>90 - 264 VAC<br>LEN120-24 24 V 5 A 88 % 1200 µF  120 W<br>(127 - 370 VDC)<br>90 - 264 VAC<br>LEN120-48 48 V 2.5 A 89 % 800 µF 120 W<br>(127 - 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. 

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PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>AC Input 90 264 VAC<br>Input voltage<br>DC Input 127 370 VDC<br>Input frequency 47 63 Hz<br>115 VAC 2.7<br>Input current A<br>230 VAC 1.6<br>115 VAC 30<br>Inrush current [ 3] A<br>230 VAC 55<br>Leakage current 240 VAC 1 mA<br>**----- End of picture text -----**<br>


3  Cold start 

## **3. OUTPUT SPECIFICATIONS** 

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

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PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>LEN120-12 12 14<br>Adjustable output voltage [ 4] LEN120-24 24 28 VDC<br>LEN120-48 48 55<br>LEN120-12 10<br>Output current LEN120-24 5 A<br>LEN120-48 2.5<br>LEN120-12 ± 2<br>Output voltage accuracy [ 5] %<br>LEN120-24 / LEN120-48 ± 1<br>Line regulation Rated load ± 0.5 %<br>Load regulation 0% - 100% load ± 1 %<br>LEN120-12  100<br>Ripple & noise [ 6] LEN120-24 120 mVpp<br>LEN120-48 150<br>Temperature coefficient ± 0.03 %/°C<br>Minimum load 0 %<br>115 VAC 8<br>Hold-up time ms<br>230 VAC 16<br>Switching frequency 65 kHz<br>**----- End of picture text -----**<br>


4  The output voltage can be adjusted by the output adjustable resistance ADJ, turn clockwise 

- 5  At full load range 

- 6  Measured with 20 MHz bandwidth, output parallel 47 µF electrolytic capacitor and 0.1 µF ceramic capacitor 

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LEN120 Series 

3 

## **4. PROTECTIONS** 

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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 < 3s after the SC disappear.<br>Normal / high temperature: auto recovery 105 150<br>Over current protection [ 7 ] % Io<br>Low temperature: respecting derating rules in Fig. 1, auto recovery 105<br>LEN120-12 16<br>Over voltage protection Vout latch off (restart required) LEN120-24 33  V<br>LEN120-48 60<br>OTP start  90<br>Over temperature protection °C<br>OTP release (Restart required) 60<br>**----- End of picture text -----**<br>


7 Constant current up to 1s, after 1s Hiccup mode applied. 

## **5. ENVIRONMENTAL SPECIFICATIONS** 

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PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>Operating temperature -20 +60 °C<br>Storage temperature -40 +85 °C<br>-20°C to -10°C (115 VAC) 2<br>All series -20°C to -10°C (230 VAC) 0<br>Temperature derating +40°C to +60°C (115 VAC) 2.5 %/°C<br>LEN120-12  +45°C to +60°C (230 VAC) 3.33<br>LEN120-24 / LEN120-48 +50°C to +60°C (230 VAC) 5<br>Input voltage derating AC Input voltage between 90 - 115 VAC / 27 - 162 VDC 1.0 %/VAC<br>Operating, non-condescending 20  90<br>Humidity %RH<br>Storage, non-condescending 10 95<br>MTBF MIL-HDBK-217F @ 25 °C 300 000 hrs<br>**----- End of picture text -----**<br>


## **6. EMC SPECIFICATIONS** 

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PARAMETER DESCRIPTION / CONDITIONS CLASS / LEVEL / CRITERION<br>Conducted emissions EN 55032 / CISPR 32  Class A<br>Radiated emissions EN 55032 / CISPR 32  Class A<br>Harmonic current IEC/EN 61000-3-2    Class A<br>ESD immunity IEC/EN 61000-4-2,    Contact ±6 kV / Air ±8 kV Performance Criterion B<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 B<br>Surge immunity IEC/EN 61000-4-5,    Line to line ±2 kV / Line to ground ±4 kV Performance Criterion B<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>


## **7. SAFETY SPECIFICATIONS** 

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PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>Safety certified according to EN 62368-1,<br>Safety standards & approvals<br>meets the requirements of UL 61010-1, UL 508<br>Safety class Class I<br>Input to Ground 2000<br>Isolation test [ 8] Input to Output 4000 VAC<br>Output to Ground 500<br>Insulation resistance At 500 VDC 100 MΩ<br>8  Electric strength test for 1 min., leakage current <10 mA<br>**----- End of picture text -----**<br>


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||**Asia-Pacifc**|**EMEA**|**North America**|
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© 2021 Bel Power Solutions & Protection                    BCD.20172_A   29 September 2021 

LEN120 Series 

4 

## **8. MECHANICAL SPECIFICATIONS** 

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PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>36 x 125 x 100 mm<br>Dimensions<br>1.42 x 4.92 x 3.94 in<br>Weight 410 g<br>Case [ 9] Material: Metal (AL1100, SGCC)<br>Cooling Convection (Natural air flow)<br>9  When the power supply is in use, the enclosure of the product needs to be connected to the system grounding.<br>9.  DERATING CURVES<br>230 VAC<br>100 100<br>80 115 VAC 24 V, 48 V (230 VAC)<br>12 V (230 VAC) 75<br>Input Voltage:<br>12 V, 24 V, 48 V (115 VAC)<br>90 - 264 VAC<br>50 127 - 370 VDC Ambient Temperature:25°C<br>-20 -10 40 45 50 60<br>90 115 264 VAC<br>Ambient Temperature [°C] 127 162 370 VDC<br>Input Voltage<br>Output Power [%] Output Power [%]<br>**----- End of picture text -----**<br>


Figure 1. Temperature Derating Curve 

Figure 2. Input Voltage Derating Curve 

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100 100<br>95 95<br>90 LEN120-48LEN120-24 90 LEN120-48LEN120-24<br>85 LEN120-12 85 LEN120-12<br>80 80<br>75 75<br>70 70<br>65 65<br>60 60<br>90 115 230 264 10 25 40 50 65 75 90 100<br>Input Voltage [VAC] Output Current [%]<br>Efficiency [%] Efficiency [%]<br>**----- End of picture text -----**<br>


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

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

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LEN120 Series 

5 

## **10.  MECHANICAL DRAWINGS** 

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All dimensions are in mm [in]<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>6.35 [0.250]<br>100.00 [3.937]<br>4 3 2 1<br>DC ON<br>+V<br>ADJ<br>PIN FUNCTION<br>Side View Front View 1 -Vo<br>OUTPUT   2 -Vo<br>TERMINAL 3 +Vo<br>4 +Vo<br>5 AC (N)<br>INPUT<br>5 6 7 TERMINAL 6 AC (L)<br>7 *<br>GROUNDING<br>SCREW *<br>ADJ Output adjustable resistor<br>108.90 [4.288] 6.35 [0.250]<br>DC OK SIGNAL Monitors the output voltage<br>on the output terminals<br>* Pin 7 and the grounding screw are interconnected.<br>  Either Pin 7 or the grounding screw need to be<br>  connected to earth.<br>Bottom View Grounding<br>screw ( )<br>36.00 [1.417]<br>125.00 [4.921]<br>129.80 [5.110]<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. 

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© 2021 Bel Power Solutions & Protection                    BCD.20172_A   29 September 2021