Solid state relay circuit board design, copying, sampling, cloning, and production

Solid state relay circuit board design, copying, sampling, cloning, and production

1、 Product Introduction

1. Product Usage

Solid state relays are widely used in temperature control, light control, and various non insulated AC switch applications.

2. Product features

(1) Adopting zero crossing triggering form, with a wide control voltage range.

(2) Low voltage drop square chips imported from Germany.

(3) The thyristor chip is isolated from the thermal conductive substrate. Using DCB board and other advanced thermal insulation materials, it has good thermal conductivity and the bottom plate is not charged, ensuring safe use.

(4) The number of thermal cycle loads exceeds the national standard by nearly 10 times, and the service life is long.

3. Product model and specifications (see Table 1 for details)

Table 1: Product Models and Specifications

Note: 1. The current in the specification column is the effective value of the maximum AC current output per phase; The voltage is the effective value of the highest input working line voltage

2. Special specifications can be customized according to user requirements.

2、 General parameters of solid-state relays

(1) Working frequency: 50Hz

(2) Control power supply: 4-20VDC 50mA

(3) Insulation voltage VISO (RMS): 2500VAC

3、 Installation of solid-state relays

1. The appearance and installation dimensions of solid-state relays are shown in Figure 1, Figure 2, and Table 2

2. Installation steps for solid-state relays

Step 1: Install the radiator and fan according to ventilation requirements.

Step 2: Apply a layer of thermal conductive silicone grease evenly on the surface of the thermal conductive substrate and the surface of the heat sink of the solid-state relay, and then fix the solid-state relay to the heat sink with screws. Pay attention to the uniform force of each screw.

Step 3: Tie the copper wire tightly with a terminal ring to prevent poor contact and additional heating. Then, cover it with an insulated heat shrink tube and heat it with hot air or hot water for contraction.

Step 4: Place the wiring terminals flat on the solid-state relay electrodes, tighten them with screws, and maintain good flat pressure contact.

Step 5: Connect the control line

1. The rest are empty feet. That is, pin 1 is connected to the positive pole of the DC control power supply with a red wire; Use a black wire to connect pin 2 to the negative terminal of the control power supply.

2. The electrode wiring method directly leads the control power supply to the control electrode. The red wire is connected to the positive terminal of the control terminal, and the black wire is connected to the negative terminal of the control terminal (this wiring method is applicable to single-phase solid-state relays below 147A)

Table 2 External dimensions and installation dimensions of solid-state relays

4、 Precautions

1. Selection of current specifications for solid-state relays

Select based on the nature of the load and the rated current of the load

(1) Resistive load: The maximum current of solid-state relays should be twice the rated current of the load.

(2) Inductive load: The maximum current of solid-state relays should be three times the rated current of the load.

(3) If the load current changes significantly, increase the current multiplier appropriately.

(4) Ensure that the actual working current of the load during the entire operation process does not exceed the maximum current of the solid-state relay.

2. Selection of radiator fan

The module must be equipped with a heat sink and fan during normal operation.

Radiator and fan selection: It is recommended to use the manufacturer's matching radiator and fan. When users bring it themselves, the following principles should be followed for selection:

(1) It must be able to ensure that the temperature of the heat dissipation bottom plate does not exceed 75 ℃ during normal operation of the module;

(2) When the module load is light, the size of the heat sink can be reduced or natural cooling can be used;

(3) For those with water cooling conditions, water cooling should be preferred for heat dissipation.

Table 3 Overview of Heat Sinks Used in Solid State Relays

3. Usage requirements

(1) Workplace environmental temperature range: -25 ℃~+45 ℃

(2) The surrounding area of the module should be dry, ventilated, away from heat sources, dust-free, and free from corrosive liquids or gases.

(3) It is strictly prohibited to directly crimp copper wires onto the electrodes of solid-state relays without using wiring terminals to prevent poor contact and additional heating.

(4) Regularly measure the surface temperature of the heat sink on the side of the thermal conductive substrate or near the solid-state relay, and the temperature at the testing point should be less than 80 ℃.

We specialize in the design, copying, sampling, and cloning production of solid-state relay circuit boards. Our business scope covers the research and development, design, and equipment technology updates of various types of machinery and equipment control boards and control systems, as well as the research and development, design, production, and customization of testing precision power supplies and mechanical and non-standard testing systems.