The LH1550 is a single pole single throw (SPST), normally open (NO), solid state relay. The relay can control AC or DC loads currents up to 100 mA, with a supply voltage up to 350 V. The device is packaged in a six pin 0.3 inch dualin line package. This package offers an insulation dielectric withstand of 3750 VRMS.
The coupler consists of a AlGaAs LED that is optically coupled to a dielectrically isolated photodiode array which drives two series connected high voltage MOS transistors. The typical ON-Resistance is 37 at 25 mA and is linear up to 50 mA. There is built-in current limiting circuitry in the detector chip, enabling it to pass FCC 68-302 and other regulatory voltage surge requirements when over voltage protection is provided.
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• Telephone Switch Hook• High Voltage Test Equipment• TRIAC Driver• Motor Control• Industrial Control Systems
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• Normally Open, Single Pole Single Throw Operation• Control 350 VAC or DC Voltage• Switch 100 mA Loads• LED Control Current, 2.5 mA• Low ON-Resistance, 37 Typ. at 100 mA• Isolation Test Voltage, 3750 VACRMS• Current Limit Protection• Underwriters Lab File # E52744
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Emitter
Reverse Voltage ..................................................................5.0 V
Continuous Forward Current .............................................50 mA
Peak Forward Current (1s) ..................................................1 A
Power Dissipation............................................................100 mW
Derate Linearly from 25°C........................................1.3 mW/°C
Detector
Output Breakdown Voltage.................................................350 V
Continous Load Current ..................................................100 mA
Total Power Dissipation ..................................................300 mW
Derate Linearly from 25°C.......................................See Figure 4
Package
Isolation Test Voltage.............................................3750 VACRMS
Power Dissipation...........................................................400 mW
Derate Linearly from 25°C........................................2.5 mW/°C
Isolation Resistance
VIO=500 V, TA=25°C......................................................1012
VIO=500 V, TA=100°C....................................................1011
Storage Temperature Range ..............................40 to +150°C
Operating Temperature Range..............................40 to +85°C
Junction Temperature....................................................... 100°C
Soldering Temperature, 2 mm from case, 10 sec.............. 260°C
Post a Buying Lead
Required Field 
