LH1540

LH1540 HIGH VOLTAGE, SOLID STATE RELAY OPTOCOUPLER FEATURES Normally Open, Single Pole Single Throw Operation Control 350 VAC or DC Voltage Switch 150 mA Loads LED Control Current, 1 mA, Typical Low ON-Resistance, 20 Ω Typ. at 50 mA Isolation Test Voltage, 3750 VACRMS Current Limit Protection Underwriters Lab File # E52744 APPLICATIONS Telephone Switch Hook High Voltage Test Equipment TRIAC Driver Motor Control Industrial Control Systems DESCRIPTION The LH1540 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 dual-in line package. This package offers an insulation dielectric withstand of 3750 VACRMS. 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 20 Ω 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. Package Dimensions in Inches (mm) Pin One ID. 3 .248 (6.30) .256 (6.50) 4 5 6 NC 2 1 A K 1 2 6 5 S NC 3 4 .335 (8.50) .343 (8.70) .039 (1.00) Min. 4° Typ. .018 (0.45) .022 (0.55) S' .300 (7.62) Typ. .130 (3.30) .150 (3.81) 18° Typ. .020 (.051) Min. .031 (0...