Custom Aluminum Heatsink for SSR Solid State Relay Cooling
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Custom Aluminum Heatsink for SSR Solid State Relay Cooling
Do We Need a Heatsink for a Solid State Relay?
This is a common question we are frequently asked. Although it depends on your specific application, generally speaking, you will typically need to use a heatsink.
Solid State Relays (SSRs) are designed to operate at or within a specific temperature or temperature range. Temperatures outside this range can have an impact on their performance and shorten the overall lifespan of the product. Beyond a certain point, excessive heat will lead to a reduction (or derating) of the load current that the SSR can handle. Heatsinks are employed to provide a way to remove heat from the relay, enabling higher current operation. A suitable heatsink will keep the SSR within the correct temperature range for proper operation and usually extend the lifespan of the product.
Heat sinks are necessary to ensure the proper operation and long - term reliability of Solid State Relays because they offer a means to dissipate the power that is normally generated internally within the SSR into the surrounding ambient air and maintain a safe operating temperature.
Heat sinks are made of highly thermally conductive materials such as aluminum. Not only does aluminum have high thermal conductivity, but its cost is also relatively low. Although other materials like steel can provide a limited degree of heat sinking, their thermal conductivities are relatively low compared to aluminum and thus are far less effective as a heat sink. Coatings also tend to reduce the thermal dissipation effectiveness of most materials, and except for anodizing, they should be avoided.
WHY Extruded Aluminum Heat Sinks?
Extruded aluminum is one of the most popular and cost - effective manufacturing processes. The size of extruded heat sinks varies according to the application, with smaller ones suitable for board - level and larger ones for medium - power applications. They can be designed for passive or active cooling according to the fin shape and spacing. Board - level extruded heat sinks are often used in packages such as BGA and FPGA.
The choice of a suitable extruded heat sink mainly depends on the required shape. Extruded heat sinks are manufactured by creating a shape mold that determines the fin density, spacing and length, as well as the base height and width. The softened aluminum is pushed through the mold to form a long strip, called a raw material strip, which has the same shape and size as the mold. Then the bar is cut into smaller standard - shaped bars/rectangles or custom lengths. These are further processed and finished to create custom heat sinks. This process is fast, cost-effective and scalable; that's why many people first consider extruded heat sinks when looking for solutions.
Extruded Aluminum Heat Sinks handle temperatures up to 400°F. Engineers use them in computers, lighting, and electrical devices. Devices with 15W to 150W power commonly use them. The design allows efficient heat dispersion, especially in 2-inch to 3-inch profiles. Wide selection of aluminum Extruded heat sink extrusion designed for both natural convection as well as forced air cooling.
The benefits of extruded aluminum heat sinks:
1. Aluminum is a great thermal conductor, which is the main factor while creating heat sinks. In addition to this, it is popular for heat dissipation, high-strength metal heating, and lightweight material. The metal can be squeezed into various shapes of radiation, whether its wide flat heat sinks or oval sinks.
2. The Corrosion-resistant and rust-free material of aluminum is another reason why aluminum extrusion heatsinks are widely used across industries as it serves along without causing any heating issues.
3. High-pressure bearing and strength are among the qualities of aluminum extruded products. Even in the case of thinness or thickness, aluminum can handle sufficient pressure without getting damaged.
4. Aluminum is capable to handle various surface treatments with a wide range of designs and colors, making the final product look durable and attractive to be used for different devices.
5. Aluminum is known for its energy-saving, simple maintenance, and low-cost use. Hence, most companies prefer custom aluminum extrusions for their manufacturing needs.
What is a Solid state relays?
Solid state relays is a kind of electronic switch that without mechanical contacts, adopting photoelectric device and transformer to
electric isolate or signal couple the control circuit (input circuit) and load circuit (output circuit), drive solid power device to make and break or switch the load circuit.
The input circuit of solid state relays is used to input control signal and work as the triggering signal source. Generally, the input circuit of solid state relays is DC input (like resistant input, the input current will have a linear variation when voltage changes), but some are AC input.
When SSR working, it will give out a lot of heat, so in order to extend the life of your SSR, please install a heat sink , also if the current is over 60A,the cooling fan also required. And don't forget apply heat-conductive silicon grease between SSR and heat sink.
Our company integrates R&D, design, manufacturing and sales, with a group of professional, excellent R&D and cooling solution team. Aluminum extruded profile radiator, by aluminum profile after cutting, stamping, drilling, CNC and other different processing technology production. Our Extruded Heat Sink Application: LED Lamp, Computer ,Inverter, Communication Device, Power Supply Equipment, Electronic Industry, Therm electric Coolers/Generator, IGBT/UPS Cooling Systems, Automobile etc.