SSR-40DA / SSR-25DA / SSR-60DA Solid State Relay Module / INPUT 3 ~ 32V DC Heavy Duty Solid State Relay

How to choose to determine whether your electrical appliances are suitable?1. Calculate the current size:Equipment current ÷ coefficient = selection SSR currentSelection SSR current * coefficient = device current(coefficient : Resistive load is 2 times, inductive load is 6 times.)Resistive loads: electric heating, incandescent lamps, resistors, etc.Inductive loads: motors, transformers, capacitors, solenoid valves, air conditioners, lighting with inductance...etc.Example 1: A heater with a rated current of 15A, the heater is a resistive load, then the formula: 15A×2=30A, it is necessary to choose a solid state relay(SSR) larger than 30A.Example 2: A motor with a rated current of 15A, the motor is an inductive load, then the formula: 15A×6=90A, it is necessary to choose a solid state relay(SSR) larger than 90A.Example 3: A solid state relay (SSR) with a rated current of 40A can be applied to electrical appliances with a resistive load with a rated current of less than 40÷2=20A; it is suitable for electrical appliances with an inductive load with a rated current of less than 40÷6=6.6AFeatures:1. The solid state relay is small and delicate with high reliability.2. The ratio depend on the kind of loading for your equipment. Resistive load: 60%, inductive load: 30%.3. The cooling fan is necessary when the current is over 60A.4. As the generate heat of SSR is too high, SSR must be loaded on radiator when the current of load is over 10A. And there are must put the thermal grease compound between SSR and radiator.5. You need choose the correct type (the current and the control modes). Also a suitable radiator(to dissipate heat of SSR) is improtant.Description:1.This is DC To AC Solid State Relay Module 3-32VDC/24-380VAC. A solid state relay(SSR) is an electronic switch, which, unlike an electromechanical relay, contains no moving parts. The types of SSR are photo-coupled SSR, transformer-coupled SSR, and hybrid SSR. A photo-coupled sSR is controlled by a low voltasignal which is isolated optically from the load.2.The control signal in a photo-coupled SSR typically energizes an LED which activates a photo-sensitive diode. The diode turns on a back-to-back thyristor, silicon controlled rectifier, or MOSFET transistor to switchthe load.3.This SSR can switch current loads in particular model number: SSR-40DA with a 3-320DC input and a zero cross trigger control method. Each one of these relays is equipped with four screw terminals (for use with ring or fork connectors) and a plastic cover that slides over the top of the relay protect the terminals.Specifications:Model Number : SSR-40DAInput Voltage : 3-32V DCOutput Voltage : 24-380V ACRated Load Current : 40AControl current:12MAOutput current:10-100AOn-state voltage: ≤1.5VOff Leakage Current: ≤5MADielectric Strength:2500VACControl type: Zero Cross TriggerResponse time: ON<20ms/OFF<40msVoltage withstand: Over 2.5Kvac/1MinInsulation Resistance:100M Ω /500VDCDimmension: 63*45*23.2mmMaterials: high strength ABS

SSR -25DA Single phase Solid state relay                                         

Load Current:    25A
Load Voltage:       24~380VAC
Control Voltage:    3~32VDC
Control Current:    3~25MA
On Voltage:         ≤ 1.5VAC
Off Leakage Current:       ≤4MA
On-off Time:         ≤ 10MS
Dielectric Strength:    2500VAC
Insulation Resistance:    100M Ω /500VDC
Ambient Temperature:    -25~+75°C
Work instruction:    LED

SSR -40DA Single phase Solid state relay

Load Current:    40A
Load Voltage:       24~380VAC
Control Voltage:    3~32VDC
Control Current:    3~25MA
On Voltage:         ≤ 1.5VAC
Off Leakage Current:       ≤4MA
On-off Time:         ≤ 10MS
Dielectric Strength:    2500VAC
Insulation Resistance:    100M Ω /500VDC
Ambient Temperature:    -25~+75°C
Work instruction:    LED