LND4475H

## **| LN SERIES** 

## AC OUTPUT LOW NOISE SOLID STATE RELAYS 

The LN Series of panel mounted Solid State Relays offer reliable back-to-back SCR switching up to 75 Amps at 528 VAC, coupled with a patented trigger circuit design which allows the SSR to switch resistive loads with minimal electromagnetic noise generated, ideal for use in commercial, residential and medical applications. 

UL recognized and TUV certified, the LN series offers superior performance in applications that demand reliable switching and low emitted noise. 

## Features 

- Rating up to 75A @48-528 VAC per channel 

- Zero Voltage Turn-On Switching 

- Conformance with IEC60947-4-3 Environment B for low voltage  domestic, commercial and light industrial locations/installations 

- Patented Low Noise trigger circuit 

- IP20 touch-safe housing is available 

- Built-in Input/Output over-voltage protection 

- LED Input Status Indicator 

- 3500 VAC Optical isolation 

- EMC Compliant to level III 

## Applications 

- Commercial ovens 

- Professional cooking equipment 

- Household appliances 

- Medical equipment 

LOW NOISE 

## **PRODUCT SELECTION** 

|**Output Voltage**|**25 A**|**50 A**|**75 A**|
|---|---|---|---|
|**24-280 VAC**|LND2425|LND2450|LND2475|
|**48-528 VAC**|LND4425|LND4450|LND4475|



## **SPECIFICATIONS** 

## Output Voltage[(1)] 

|**Description**|**LND24XX**|**LND44XX**|
|---|---|---|
|**Operating Voltage (47-63Hz) [VRMS]**|24-280|48-528|
|**Transient Overvoltage [Vpk](2)**|500|800|
|**Maximum Off-State Leakage Current @**<br>**Rated Voltage [mARMS]**|1|1|
|**Zero Crossing Level Maximum [Vpk]**|20||
|**Minimum Off-State dV/dt @ Maximum**<br>**Rated Voltage [V/μsec]**|500||



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## Output[(1)] 

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Description LNDXX25 LNDXX50 LNDXX75<br>Load Current, LC A IEC62314 @ Ue=480VAC,  25 50 75<br>40°C [ARMS]  [(3)]<br>Minimum Load Current [mARMS] 100<br>Maximum 1 Cycle Surge Current (50/60Hz)  239/250 597/625 1145/1200<br>[Apk]<br>1 Second surge current (Apk. Ta=25°C)  85 150 225<br>50/60 Hz<br>Maximum On-State Voltage Drop @ Rated  1.3 1.25 1.15<br>Current [Vrms]<br>Maximum 1/2 Cycle I² t for Fusing (50/60Hz)  285/259 1770/1621 6560/5976<br>[A² sec]<br>Thermal Resistance Junction to Case (Rjc)  0.8 0.45 0.27<br>[°C/W]<br>Maximum Power Dissipation @Rated  32.5 62.5 86.25<br>Current [W]<br>Recomended Heat Sink for Rated Current  2 1 0.7<br>@40°C [°C/W]<br>Minimum Power Factor (at Maximum load) 0.7<br>**----- End of picture text -----**<br>


## Input[(1)] 

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Description LND24XX LND44XX<br>Control Voltage Range [VDC] [ (4)] 4.8 - 32<br>Maximum Reverse Voltage [VDC] 32<br>Minimum Turn-On Voltage [VDC]  4.8<br>Minimum Turn-Off Voltage [VDC]  1.1<br>Minimum Input Current (for on-state) [mA]   8 15<br>Maximum Input Current [mA]   16 27<br>Nominal Input Impedance [ Ω ] Current Regulated<br>Maximum Turn-On Time  1/2 Cycle<br>Maximum Turn-Off Time  1/2 Cycle<br>**----- End of picture text -----**<br>


## General[(1)] 

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Description Parameters<br>Dielectric Strength, Input to Output  3500<br>(50/60Hz) [VRMS]<br>Dielectric Strength, Input/Output to Case  4000<br>(50/60Hz) [VRMS]<br>Minimum Insulation Resistance (@ 500  10 [9]<br>VDC) [ Ω ]<br>Maximum Capacitance, Input/Output [pF] 12<br>Ambient Operating Temperature Range [°C]  -40 to 80<br>(5)<br>Ambient Storage Temperature Range [°C]  [(5)] -40 to 100<br>Weight (typical) [oz/g] 2.6/74.9<br>**----- End of picture text -----**<br>


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|**Housing Material**|UL94 V-0|
|---|---|
|**Baseplate Material**|Aluminum|
|**Input Terminal Screw Torque Range [lb-in/**<br>**Nm]**|13-15/1.5-1.7|
|**Load Terminal Screw Torque Range [lb-in/**<br>**Nm]**|18-20/2-2.2|
|**SSR Mounting Screw Torque Range [lb-in/**<br>**Nm]**|18-20/2-2.3|
|**Humidity per IEC60068-2-78**|93% non-condensing|
|**LED Input Status Indicator**|Green|
|**Overvoltage Category**|III|
|**Impulse Withstand Voltage according to**<br>**IEC 60664-1**|6kV|



## **THERMAL DERATE INFORMATION** 

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LNDxx25xx LNDxx50xx LNDxx75xx<br>1˚C/W 1.5˚C/W 2˚C/W 3˚C/W 0.5˚C/W 0.7˚C/W 1˚C/W 1.5˚C/W 2˚C/W 0.5˚C/W 0.7˚C/W 1˚C/W 1.5˚C/W<br>25 50 75<br>20 40 60<br>15 30 45<br>10 20 30<br>5 10 15<br>0 0 0<br>20 25 30 35 40 45 50 55 60 65 70 75 80 20 25 30 35 40 45 50 55 60 65 70 75 80 20 25 30 35 40 45 50 55 60 65 70 75 80<br>Ambient Temperature (ºC) Ambient Temperature (ºC) Ambient Temperature (ºC)<br>INPUT CURRENT INFORMATION [(1)]<br>LND24xx LND44xx<br>16 25<br>14<br>20<br>12<br>10 15<br>8<br>6 10<br>4<br>5<br>2<br>0 0<br>05 10 15 20 25 30 35 05 10 15 20 25 30 35<br>Input Voltage (VDC) Input Voltage (VDC)<br>Load Current (Amps) Load Current (Amps) Load Current (Amps)<br>Input Current (mA) Input Current (mA)<br>**----- End of picture text -----**<br>


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## **EQUIVALENT CIRCUIT BLOCK AND WIRING DIAGRAMS** 

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DC Control<br>(7)<br>+3 1 Load<br>A<br>+<br>DC -V TriggerCircuit V AC<br>B<br>-4 2 Load<br>Current<br>Limiter Load can be wired in position A or B<br>INPUT OUTPUT<br>**----- End of picture text -----**<br>


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SURGE CURRENT INFORMATION<br>LNDxx25xx LNDxx50xx<br>300 700<br>250 600<br>500<br>200<br>400<br>150<br>300<br>100<br>200<br>50 100<br>0 0<br>0.01 0.11 10 0.01 0.11 10<br>LNDxx75xx<br>1100<br>1000<br>900<br>800 (6)<br>700 Single Pulse<br>600<br>500<br>400<br>300<br>200<br>100<br>0<br>0.01 0.11 10<br>Surge Duration (sec)  Surge Duration (sec)<br>Surge Duration (sec)<br>Surge Current (Amp) AC Peak Surge Current (Amp) AC Peak<br>Surge Current (Amp) AC Peak<br>**----- End of picture text -----**<br>


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## **CONDUCTED RADIOFREQUENCY EMISSION TEST** 

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LND2450<br>80.00<br>70.00<br>60.00<br>50.00<br>40.00<br>30.00<br>20.00<br>10.00<br>0.00<br>-10.00<br>-20.00<br>0.1501 0.1501.500 15.000<br>MHz<br>dBuV<br>**----- End of picture text -----**<br>


## **GENERAL NOTES** 

- (1) All parameters at 25°C unless otherwise specified. 

- (2) Output will self trigger beyond 450-600 Vpk for LND24XX or 900-1200 Vpk for LND44XX models, not suitable for capacitive loads. 

- (3) Heat sinking required, see derating curves. 

- (4) Increase minimum voltage by 1 V for operations from -20 to -40°C. 

- (5) No freezing or condensation allowed. 

- (6) For single surge pulse Tc=25°C; Tj=125°C. 

- (7) Load can be wired to either SSR output terminal 1 or 2. 

## **INSTALLATION INSTRUCTIONS** 

## **Mounting on Heat Sinks** 

Select adequate heat sink (see thermal derating curves). 

"Be sure to use a thermal pad or thermal compound (0.006 - 0.008 in layer thickness recommended) SSR and the selected heat sink. thickness recommended) between the SSR and the selected heat sink." 

Before applying full torque tighten down both screws until they contact the baseplate. Then, tighten them to 20 lb-in (2.2 Nm). 

For optimal thermal performance heat sink fins should be oriented vertically to promote natural convection airflow. 

## **Mounting on Panels** 

Locate the panel section on which the SSR will be mounted. Panel mount surface must provide adequate heat sinking capability, uncoated, clean, flat (0.004 in/in recommended) and preferably aluminum. 

Be sure to use a thermal pad or thermal compound (0.006 - 0.008 in layer thickness recommended) between the SSR and the panel. 

SSR mounting slots have a diameter of 0.2 in (5.0 mm). Two screws are needed (not included) to mount the SSR onto panel. Choose screw length considering the mounting surface hole depth and that the SSR baseplate thickness is 0.125 in (3.2 mm). 

Before applying full torque tighten down both screws until they contact the baseplate. Then, tighten them to 20 lb-in (2.2 Nm). 

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|**Recommended Torque and Wire Sizes**|**Recommended Torque and Wire Sizes**|**Recommended Torque and Wire Sizes**|**Recommended Torque and Wire Sizes**|
|---|---|---|---|
|**Terminal**|**Max. Screw Torque**<br>**[lb-in (Nm)]**|**Wire Size**<br>**(Solid / Stranded)**|**Wire Pull-Out**<br>**Strength (lb)[N]**|
|Output|18-20 (2.0-2.2)|20 AWG (0.75 mm2) [minimum]|25 [111]|
|||2 x 10 AWG (6 mm2)|80 [355]|
|||2 x 8 AWG (10 mm2) [maximum]|90 [400]|
|Input|13-15 (1.5-1.7)|28 AWG (0.09 mm2) [minimum]|2.2 [9.8]|
|||2 x 12 AWG (4 mm2) [maximum]|22 [98]|



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fig. 1 SSR mounted on HS053 heat sink 

## **MECHANICAL SPECIFICATIONS** 

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LN SERIES IP20 LN SERIES IP00<br> 1 .10  1 .10<br> 027.9.49 Mounting Hole/Slot  27.9 Mounting Hole/Slot   0 .95<br>12.4 0.19 [4.9]   0 .49 0.19 [4.9]  24.0<br>DIA. 12.4 DIA.<br> 1 .88  1 .70 2.32  1 .88  1 .70  2 .25<br>47.6 43.2  [58.8] 2.25 47.6 43.2 57.2<br> [57.2]<br>0.71<br> 1 .00<br> 1 .00  [17.9]<br>25.4<br>25.4<br> 1 .75  1 .75<br>44.5 44.5<br>**----- End of picture text -----**<br>


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LN SERIES IP00 OPTION 'K'<br> 1 .10<br>Mounting<br>27.9  1 .06<br>Hole/Slot<br> 0 .49 26.8<br>12.4 0.19 [4.9]<br>DIA.<br> 1 .70  2 .25<br> 1 .88<br>43.2 57.2<br>47.6<br> 1 .00<br>25.4<br> 1 .75<br>44.5<br>**----- End of picture text -----**<br>


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## **ORDERING OPTIONS** 

## Example : LND4475CH 

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LN - D - 44 - 75 - K - C - H<br>Series<br>LN =  Low Noise Solid State Relay<br>Control Voltage<br>D =  4.8-32 VDC<br>Operating Voltage<br>24 =  24-280 VAC<br>44 =  48-528 VAC<br>Rated Load Current<br>25 =  25A<br>50 =  50A<br>75 =  75A<br>Termination<br>Blank =  Screw & Clamps<br>K =  Installed standoffs with screws for PC Board mounting (IP00 only)<br>Protective Cover<br>Blank =  Not included (IP00)<br>C =  Included (IP20)<br>Thermal Pad<br>Blank =  Not included Required for valid part number<br>H =  Included For options only and not required for valid part<br>number<br>**----- End of picture text -----**<br>


## **ACCESSORIES** 

||**Recommended Accessories**|**Recommended Accessories**|**Recommended Accessories**|**Recommended Accessories**|**Recommended Accessories**|
|---|---|---|---|---|---|
|||||**Thermal Pad**|**Lug Terminal**|
|**Hardware Kit**|**Heat Sink Part No.**|**Thermal Resistance [ºC/W]**||||
|HK1<br>HK4|HS501DR<br>HS301 / HS301DR<br>HS251<br>HS201 / HS201DR<br>HS202 / HS202DR<br>HS172<br>HS151 / HS151DR<br>HS122 / HS122DR<br>HS103 / HS103DR<br>HS101<br>HS073<br>HS072<br>HS053|5<br>3<br>2.5<br>2<br>2<br>1.7<br>1.5<br>1.2<br>1<br>1<br>0.7<br>0.7<br>0.5||HSP-1<br>HSP-2|TRM0<br>TRM6|



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**AGENCY APPROVALS & CERTIFICATIONS Approvals (Tested and Certified According To)** E116950 UL 508 and C22.2 No.14 EN 62314 ~~a~~ **Conformances Environmental Vibration Shock Electromagnetic Electromagnetic Resistances Resistance Resistance Interference Compatibility IEC to heat and IEC 60068-2-6 IEC 60068-2-27 IEC 60947-4-3 61000-6-2 fire (See Table 1) (See Table 1)** Amplitude Peak Acceleration: Conducted Disturbances IEC 61000-4-2 (ESD) IEC 60335-1, Directive Directive GBT 26572Range: 10-55 Hz, 15g, Duration CISPR 11 Section 30 2006/95/ 2011/65/EU 2011 IEC 61000-4-4 (Burst) Displacement 11ms. EC 0.75mm IEC 61000-4-5 (Surge) **Table 1. Electromagnetic Compatibility / Electromagnetic Interference Generic Standard Specific Standard Test Specification Level Performance** Electrostatic Discharge 8kV air discharge Criterion A IEC 61000-4-2 6kV contact discharge Criterion A Fast transients (burst) Output 2kV, 5kHz, 100kHz Criterion B IEC 61000-4-4 Input 1kV, 5kHz, 100kHz Criterion B IEC 61000-6-2 1kV Line to Neutral Criterion B Immunity for Industrial Output 2kV Line to Earth Criterion B Environments Surge 2kV Neutral to Earth Criterion B IEC 61000-4-5 500V Line to Neutral Criterion B Input 1kV Line to Earth Criterion B 1kV Neutral to Earth Criterion B Frequency, MHz Quasi-peak, dB(uV) Average, dB(uV) IEC 60947-4-3 0.15 to 0.5 66 to 56 56 to 46 Environment B Low Conducted Class B Group 1 & voltage domestic, 0.5 to 5 56 46 Disturbances CISPR 11 Group 2 commercial and light 5 to 30 60 50 industrial installations 240VAC @40A & 440VAC @35A with Resistive Load Page 8 Copyright © 2019 Sensata Technologies, Inc. www.sensata.com ~~=~~ 

## **WARNINGS** 

RISK OF MATERIAL DAMAGE AND HOT ENCLOSURE 

- The product’s side panels may be hot, allow the product to cool before touching 

- Follow proper mounting instructions including torque values 

- Do not allow liquids or foreign objects to enter this product 

**Failure to follow these instructions can result in serious injury, or equipment damage.** 

HAZARD OF ELECTRIC SHOCK, EXPLOSION OR ARC FLASH 

• Disconnect all power before installing or working with this equipment 

- Verify all connections and replace all covers before turning on power 

**Failure to follow these instructions will result in death or serious injury.** 

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Rev:10/16/19_ ERN 20763 FDE-07-01 Rev. B 

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