
Solid state relays, or SSRs are electrical switching devices that serve the same purpose as electromechanical relays, but without the moving parts hence the name 'solid state'. By having no moving parts, the SSR tends to have a longer operational lifetime as they are not subjected to wear and tear.

Solid state relays can switch faster than their electromechanical counterparts, as they use the electrical and optical properties of semiconductors to perform the switching functions. RS offers an extensive range of solid state relays in New Zealand (NZ) from trusted brands and for all types of applications.

## **Types of Solid State Relays**

Solid state relays (SSRs) are available in various types to meet specific application needs. From ac to dc solid state relays and more, read more about the different types of SSRs available to choose the right one for your operations in NZ.

### **Zero-Crossing SSRs**

Zero-crossing solid state relays are designed to reduce electrical noise and prevent voltage spikes during switching. These SSRs initiate the switching process when the AC voltage crosses zero, minimising electrical interference. They are ideal for industrial automation, heating control, and motor drives.

### **Single-Phase AC SSRs**

Single-phase AC solid state relays are perfect for switching AC loads in single-phase circuits. Known for their reliability and fast switching, these 12V SSR relays are commonly used in controlling motors, lighting, and heating systems. By using a semiconductor to switch AC power, they ensure long-lasting performance with minimal wear.

### **Three-Phase SSRs**

Three-phase solid state relays are built to handle larger loads in three-phase power systems. These SSRs are ideal for heavy-duty industrial applications like conveyor systems, pumps, and large motors, offering superior performance by evenly distributing the load across three phases.

### **DC-Output SSRs**

DC-output solid state relays are tailored for switching DC loads, making them perfect for applications such as battery management, photovoltaic systems, and automotive electronics. These DC solid state relays provide precise control over DC circuits, ensuring stable and reliable performance in sensitive electronic environments.

## **Advantages of SSRs**

Solid state relays (SSRs) offer several key advantages over conventional electromechanical relays, making them a preferred choice in various applications across NZ. Unlike traditional relays, SSR relays have no moving parts, which eliminates issues related to wear and tear. This also means that solid state relays do not suffer from contact bounce, a common problem in electromechanical relays that can lead to unreliable switching.

**Key advantages of SSRs include:**

- **Durability**: With no moving parts, solid state relays have a longer operational lifespan compared to mechanical relays.
- **Faster Switching**: SSRs can switch both ON and OFF much faster than the armature in a mechanical relay, enhancing the efficiency of your system.
- **Zero Voltage Turn-On and Zero Current Turn-Off**: This feature in AC solid state relays helps eliminate electrical noise and transients, making them ideal for sensitive applications.

For more in-depth information, please refer to our comprehensive guide to [solid state relays](https://nz.rs-online.com/web/content/discovery/ideas-and-advice/solid-state-relays-guide).

## **Applications of SSRs**

Solid state relays (SSRs) are widely used across various industrial settings due to their reliability, durability, and fast switching capabilities. Their versatility makes them an ideal choice for controlling power delivery in numerous applications, from lighting and heating to motion-based equipment.

**Key applications of SSRs include:**

- **Industrial Control**: In industrial control systems, solid state relays are essential for managing the precise operation of machinery and equipment. They are used to control motors, pumps, and other heavy machinery, ensuring accurate and reliable performance without the wear and tear associated with mechanical relays.
- **Robotics**: SSRs play a crucial role in robotics, where fast and precise control of actuators and motors is required. The quick switching capabilities of SSR relays allow for smooth and efficient operation in robotic systems, enhancing overall performance and response time.
- **Data Acquisition**: In data acquisition systems, solid state relays are used to control and manage the flow of data by switching signals with high precision. Their ability to handle high-speed operations without generating electrical noise makes them ideal for this application.
- **Medical Equipment**: Solid state relays are integral to medical equipment, where reliability and precision are paramount. They are used to control various medical devices, ensuring consistent performance and reducing the risk of mechanical failure in critical healthcare environments.
- **Power Delivery Control**: SSRs are widely used in controlling power delivery for lighting, heating, and motion-based equipment. Their ability to switch power on and off quickly and accurately helps optimise energy efficiency and extend the lifespan of the equipment.

## **Power Up with Reliable Solid State Relays - Shop Now!**

RS New Zealand is your trusted supplier and distributor of high-quality solid state relays** (**SSRs**)**, catering to a wide range of industrial needs in NZ. Our extensive selection features top brands like [Sensata/Crydom](https://nz.rs-online.com/web/c/relays-signal-conditioning/relays/solid-state-relays/?applied-dimensions=4291937860), [Panasonic](https://nz.rs-online.com/web/c/relays-signal-conditioning/relays/solid-state-relays/?applied-dimensions=4294965862), and [Omron](https://nz.rs-online.com/web/c/relays-signal-conditioning/relays/solid-state-relays/?applied-dimensions=4294965904), ensuring that you find the perfect fit for your specific requirements. Whether you're upgrading existing systems or designing new installations, our solid state relays provide the reliability, fast switching, and precision your operations demand.

## **Ordering & Delivery Information for NZ**

RS ensures prompt delivery of solid state relays, [power relays](https://nz.rs-online.com/web/c/relays-signal-conditioning/relays/power-relays/), and other signal conditioning components solid across New Zealand. For more details on our delivery options, timeframes, and associated costs, please visit our [Delivery Information page](https://nz.rs-online.com/web/content/support/all-articles/delivery).



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