Distributors Stock

Part #LND4475C

Need more information?

Contact us to request pricing, availability and customization options

Contact Us


  • 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


Output Voltage 25 A 50 A 75 A
24-280 VAC LND2425 LND2450 LND2475
48-528 VAC LND4425 LND4450 LND4475
Description LND44XX
Oprerating Voltage (47-63Hz) [VRMS] 48-528
Transient Overvoltage [Vpk] 800
Maximum Off-State Leakage Current @ Rated Voltage [mARMS 1
Zero Crossing Level Maximum [Vpk] 20
Minimum Off-State dV/dt @ Maximum Rated Voltage [V/μsec] 500
Description LNDXX75
Load Current, LC A IEC62314 @ Ue=480VAC, 40°C [ARMS] 75
Minimum Load Current [mARMS] 100
Maximum 1 Cycle Surge Current (50/60Hz) [Apk] 1145/1200
1 Second surge current (Apk. Ta=25°C) 50/60 Hz 225
Maximum On-State Voltage Drop @ Rated Current [Vrms] 1.15
Maximum 1/2 Cycle I² t for Fusing (50/60Hz) [A² sec] 6560/5976
Thermal Resistance Junction to Case (Rjc) [°C/W] 0.27
Maximum Power Dissipation @Rated Current [W] 86.25
Recommended Heat Sink for Rated Current @40°C [°C/W] 0.7
Minimum Power Factor (at Maximum load) 0.7
Description LND44XX
Control Voltage Range [VDC] 4.8 - 32
Maximum Reverse Voltage [VDC] 32
Minimum Turn-On Voltage [VDC] 4.8
Minimum Turn-Off Voltage [VDC] 1.1
Minimum Input Current (for on-state) [mA] 15
Maximum Input Current [mA] 27
Nominal Input Impedance [Ω] Current Regulated
Maximum Turn-On Time 1/2 Cycle
Maximum Turn-Off Time 1/2 Cycle
Description Parameters
Dielectric Strength, Input to Output (50/60Hz) [VRMS] 3500
Dielectric Strength, Input/Output to Case (50/60Hz) [VRMS] 4000
Minimum Insulation Resistance (@ 500 VDC) [Ω] 109
Maximum Capacitance, Input/Output [pF] 12
Ambient Operating Temperature Range [°C] -40 to 80
Ambient Storage Temperature Range [°C] -40 to 100
Weight (typical) [oz/g] 2.6/74.9
Housing Material Ul94 V-0
Baseplate Material Aluminum
Input Terminal Screw Torque Range [lb-in/Nm] 13-15/1.5-1.7
Load Terminal Screw Torque Range [lb-in/Nm] 18-20/2-2.2
SSR Mounting Screw Torque Range [lb-in/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 IEC 60664-1 6kV
Series Control Voltage Operating Voltage Related Load Current Termination Protective Cover Thermal Pad
LN = Low Noise Solid State Relay D = 4.8-32VDC 24 = 24-280VAC
44 = 48-528VAC
25 = 25A
50 = 50A
75 = 75A
Blank = Screw & Clamps
K = Installed standoffs with screws for PC Board mounting (IP00 only)
Blank = Not included (IP00)
C = Included (IP20)
Blank = Not included
H = Included

Related Resources