LEN120-24

## LEN120 Series 

120 W AC-DC DIN Rail Switching Power Supply Not Recommended for New Design 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 AS a 3 | | for space saving. The product series provides a good EMC foe | performance and is compliant with international safety 0c ON e standards UL 61010-1, EN/BS EN 62368-1. vo © **FEATURES** • Input voltage 90 - 264 VAC (universal) • Output voltage 12 V, 24 V, 48 V (adjustable) ' " • Operating ambient temperature range -20°C to +60°C Bis • 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 • UL 61010-1 safety certified • Dimensions 36 x 125 x 100 mm (1.42 x 4.92 x 3.94 in) s CE UKC5C5 ¢(UL)us LISTED **APPLICATIONS** • Industrial control equipment • Machinery • Harsh environment applications 

## 120 W AC-DC DIN Rail 

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

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

> o ~~Aw~~ s CE UKC5C5 ¢(UL)us LISTED 

Switching Power Supply Not Recommended for New Design 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. The product series provides a good EMC performance and is compliant with international safety standards UL 61010-1, EN/BS EN 62368-1. 

• Input voltage 90 - 264 VAC (universal) • 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 

**belfuse.com/power-solutions** 

LEN120 Series 

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## **1. MODEL SELENTION** 

|DESIGN<br>**MODEL**<br>**INPUT VOLTAGE**<br>**RANGE**<br>**OUTPUT**<br>**VOLTAGE**<br>**MAX OUTPUT**<br>**CURRENT**<br>**EFFICIENCY 1**<br>**MAX.**<br>**CAPACITIVE**<br>**LOAD**<br>**MAX OUTPUT**<br>**POWER 2**<br>LEN120-12<br>90 - 264 VAC<br>12 V<br>10 A<br>85 %<br>3000 µF<br>120 W<br>LEN120-24<br>90 - 264 VAC<br>24 V<br>5 A<br>88 %<br>1200 µF<br>120 W<br>LEN120-48<br>90 - 264 VAC<br>48 V<br>2.5 A<br>89 %<br>800 µF<br>120 W<br>1Typical, at 230 VAC input<br>2See DERATING CURVES on page 4<br>**. INPUT SPECIFICATIONS**<br>All specifcations are measured at Ta = 25°C, humidity <75 % nominal input voltage and rated output load unless otherwise specifed.<br>**PARAMETER**<br>**DESCRIPTION / CONDITIONS**<br>**MIN**<br>**TYP**<br>**MAX**<br>**UNIT**<br>Input voltage<br>AC Input<br>90<br>264<br>VAC<br>Input frequency<br>47<br>63<br>Hz<br>Input current<br>115 VAC<br>230 VAC<br>2.7<br>1.6<br>A<br>Inrush current3<br>115 VAC<br>230 VAC<br>30<br>55<br>A<br>Leakage current<br>240 VAC<br>1<br>mA|
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## **2. INPUT SPECIFICATIONS** 

## **3. OUTPUT SPECIFICATIONS** 

|T FOR N<br>All specifcations are measured at Ta = 25°C, humidity <75 % nominal input voltage and rated output<br>**PARAMETER**<br>**DESCRIPTION / CONDITIONS**<br>**MIN**<br>Adjustable output voltage4<br>LEN120-12<br>LEN120-24<br>LEN120-48<br>12<br>24<br>48<br>Output current<br>LEN120-12<br>LEN120-24<br>LEN120-48<br>Output voltage accuracy5<br>LEN120-12<br>LEN120-24 / LEN120-48<br>Line regulation<br>Rated load<br>Load regulation<br>0% - 100% load<br>Ripple & noise6<br>LEN120-12<br>LEN120-24<br>LEN120-48<br>Temperature coeffcient<br>Minimum load<br>0<br>Hold-up time<br>115 VAC<br>230 VAC<br>8<br>16<br>Switching frequency|<br>load unless otherwise<br>**TYP**<br>**MAX**<br>14<br>28<br>55<br>10<br>5<br>2.5<br>± 2<br>± 1<br>± 0.5<br>± 1<br>100<br>120<br>150<br>± 0.03<br>65|<br>specifed.<br>**UNIT**<br>VDC<br>A<br>%<br>%<br>%<br>mVpp<br>%/°C<br>%<br>ms<br>kHz|
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**INPUT VOLTAGE OUTPUT MAX OUTPUT MAX OUTPUT MODEL EFFICIENCY[ 1] CAPACITIVE RANGE VOLTAGE CURRENT POWER[ 2] LOAD** LEN120-12 90 - 264 VAC 12 V 10 A 85 % 3000 µF 120 W LEN120-24 90 - 264 VAC 24 V 5 A 88 % 1200 µF 120 W LEN120-48 90 - 264 VAC 48 V 2.5 A 89 % 800 µF 120 W 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. **PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT** AC Input 90 264 VAC Input frequency 47 63 Hz 115 VAC 2.7 A 230 VAC 1.6 115 VAC 30 Inrush current[ 3] A 230 VAC 55 Leakage current 240 VAC 1 mA 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. **PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT** LEN120-12 12 14 Adjustable output voltage[ 4] LEN120-24 24 28 VDC LEN120-48 48 55 LEN120-12 10 Output current LEN120-24 5 A LEN120-48 2.5 LEN120-12 ± 2 Output voltage accuracy[ 5] % LEN120-24 / LEN120-48 ± 1 Line regulation Rated load ± 0.5 % Load regulation 0% - 100% load ± 1 % LEN120-12 100 Ripple & noise[ 6] LEN120-24 120 mVpp LEN120-48 150 Temperature coefficient ± 0.03 %/°C Minimum load 0 % 115 VAC 8 ms 230 VAC 16 Switching frequency 65 kHz 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 tech.support@psbel.com **belfuse.com/power-solutions** 

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## **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>7 Constant current up to 1s, after 1s Hiccup mode applied.<br>5. ENVIRONMENTAL SPECIFICATIONS<br>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>6. EMC SPECIFICATIONS<br>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>7. SAFETY SPECIFICATIONS<br>PARAMETER DESCRIPTION / CONDITIONS MIN TYP MAX UNIT<br>Safety standards & approvals UL 61010-1, UL 61010-2-201 safety certified<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>Asia-Pacific EMEA North America<br>+86 755 298 85888 +353 61 49 8941 +1 866 513 2839<br>belfuse.com/power-solutions<br>© 2024 Bel Fuse Inc.                BCD.20172_C   31 May 2024<br>NOT FOR NEW DESIGN<br>**----- End of picture text -----**<br>


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## **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.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>12 V, 24 V, 48 V (115 VAC)<br>50 Input Voltage: Ambient Temperature:25°C<br>90 - 264 VAC<br>-20 -10 40 45 50 60 90 115 264 VAC<br>Ambient Temperature [°C] Input Voltage<br>Figure 1. Temperature Derating Curve Figure 2. Input Voltage Derating Curve<br>100 100<br>95 95<br>90 LEN120-48LEN120-24LEN120-24 90 LEN120-48LEN120-24LEN120-24<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>Figure 3. Efficiency vs Input Voltage Derating Curve (Full Load) Figure 4. Efficiency vs Output Load Derating Curve (Vi = 230 VAC)<br>Output Power [%] Output Power [%]<br>Efficiency [%] Efficiency [%]<br>**----- End of picture text -----**<br>


## **9.  DERATING CURVES** 

36 x 125 x 100 mm 1.42 x 4.92 x 3.94 in 410 g[[ 9]] Material: Metal (AL1100, SGCC) Convection (Natural air flow) 9  When the power supply is in use, the enclosure of the product needs to be connected to the system grounding.When the power supply is in use, the enclosure of the product needs to be connected to the system grounding. **9.  DERATING CURVES** 230 VAC 100 100 80 115 VAC 24 V, 48 V (230 VAC) 12 V (230 VAC) 75 12 V, 24 V, 48 V (115 VAC) 50 Input Voltage: Ambient Temperature:25°C 90 - 264 VAC -20 -10 40 45 50 60 90 115 264 VAC Ambient Temperature [°C] Input Voltage Figure 1. Temperature Derating Curve Figure 2. Input Voltage Derating Curve 100 100 95 95 90 **LEN120-48LEN120-24LEN120-24** 90 **LEN120-48LEN120-24LEN120-24** 85 **LEN120-12** 85 **LEN120-12** 80 80 75 75 70 70 65 65 60 60 90 115 230 264 10 25 40 50 65 75 90 100 Input Voltage [VAC] Output Current [%] Figure 3. Efficiency vs Input Voltage Derating Curve (Full Load) Figure 4. Efficiency vs Output Load Derating Curve (Vi = 230 VAC) tech.support@psbel.com **belfuse.com/power-solutions** 

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## **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>Figure 5. Mechanical Drawing<br>NUCLEAR AND MEDICAL APPLICATIONS  - Products are not designed or intended for use as critical components in life support systems, equipment used in<br>hazardous environments, or nuclear control systems.<br>TECHNICAL REVISIONS  - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date<br>manufactured. Specifications are subject to change without notice.<br>Asia-Pacific EMEA North America<br>+86 755 298 85888 +353 61 49 8941 +1 866 513 2839<br>belfuse.com/power-solutions<br>© 2024 Bel Fuse Inc.                BCD.20172_C   31 May 2024<br>NOT FOR NEW DESIGN<br>36.00 [1.417]<br>125.00 [4.921]<br>129.80 [5.110]<br>**----- End of picture text -----**<br>