Industrial Time Delay Relay Series

The role of the intermediate relay: to play the role of converting and transmitting control signals. Its input signal is the electrical signal of the coil, and the output signal is the contact action of the intermediate relay. In essence, it is a kind of voltage relay, which has the characteristics of a large number of contacts.

The power supply used in the elctromagnetic coil of the intermediate relay is DC and AC.



An intermediate relay is essentially a voitage relay, usually used to transmit signals and control multiple circuits simultaneously, and can also be used to directly control small capacity motors or other electrical actuators. The structure and working principle of the intermediate relay are basically the same as that of the AC contactor. The main difference with the AC contactor is that the number of contacts is large and the contact capacity is small, so only a small current is allowed.





How to Choose the Right Intermediate Relay for Your Application


The selection of intermediate relays is mainly based on the voltage level of the controlled circuit, the number, type, and capacity of contacts,

The form and voltage level of the coil power supply should be consistent with the control circuit. If the control circuit of a CNC machine tool is powered by DC 24V, a DC appliance with a rated working voltage of 24V for the coil should be selected

The requirements for selecting the type and quantity of contacts for the control circuit are normally open or normally closed,

The rated voltage of electrical contacts should be greater than or equal to the voltage of the controlled circuit,



The contact current of electrical appliances should be greater than or equal to the rated current of the controlled circuit. If the inductance is negative, it should be reduced to less than 50% of the rated current for use. According to the voltage level, number, type, and capacity of the controlled circuit, the coil power supply form and voltage level should be consistent with the control circuit. If the control circuit of a CNC machine tool uses DC 24V power supply, a DC relay with a rated working voltage of 24V for the coil should be selected. (b) Select the type (normally open or normally closed) and quantity of contacts according to the requirements of the control circuit. (c) The rated voltage of the relay contacts should be greater than or equal to the voltage of the controlled circuit The contact current of the relay should be greater than or equal to the rated current of the controlled circuit. If it is an inductive load, it should be reduced to less than 50% of the rated current for use.

Magnetic latching relays are an essential component in many electronic systems, providing stable state retention and reliable switching. When designing a magnetic latching relay, it is crucial to balance the magnetic circuit design to ensure optimal performance. This article will explore the key considerations and techniques to achieve this balance, resulting in a high-performing magnetic latching relay.

Understanding the Magnetic Circuit Design

The magnetic circuit design of a latching relay is critical to its overall performance. It is essential to understand the principles of magnetic circuits to effectively design a relay that can maintain a stable state retention and reliably switch between states. The magnetic circuit consists of the core material, coil, and armature, and their interactions play a crucial role in the relay's operation.

The core material's permeability and saturation are essential factors in the magnetic circuit design. Permeability determines how easily the core material can be magnetized, while saturation dictates the maximum magnetic flux the material can hold. Selecting the right core material with the appropriate permeability and saturation characteristics is crucial for achieving stable state retention and reliable switching.

The coil design also greatly impacts the magnetic circuit. The number of turns in the coil and the current passing through it determine the strength of the magnetic field produced. Ensuring that the coil produces a sufficient magnetic field to actuate the armature is essential for reliable switching. Additionally, the design of the armature and its interaction with the magnetic field produced by the coil are crucial in achieving stable state retention.

Understanding the magnetic circuit design allows for the optimization of the relay's performance. By carefully considering the core material, coil design, and armature interaction, designers can ensure that the magnetic latching relay maintains stable state retention and reliably switches between states.

Balancing the Magnetic Circuit for Stable State Retention

Achieving stable state retention in a magnetic latching relay requires a well-balanced magnetic circuit design. When the relay is in its latched state, the magnetic flux must be maintained to keep the armature in position. Balancing the magnetic circuit to achieve this retention involves optimizing the core material, coil design, and overall circuit geometry.

To achieve stable state retention, it is essential to select a core material with high permeability and saturation characteristics. High permeability allows the core to maintain a strong magnetic field, while saturation ensures that the magnetic flux remains stable. Additionally, the design of the coil must provide sufficient magnetic field strength to keep the armature latched in position.

The overall geometry of the magnetic circuit plays a crucial role in balancing the design for stable state retention. The path of the magnetic flux, including the core, coil, and armature, must be carefully considered to minimize air gaps and maximize the magnetic field strength. By optimizing the magnetic circuit geometry, designers can achieve stable state retention in a magnetic latching relay.

Balancing the magnetic circuit for stable state retention involves careful consideration of core material selection, coil design, and overall circuit geometry. By optimizing these factors, designers can ensure that the relay maintains a stable latched state, providing reliable performance in electronic systems.

Ensuring Reliable Switching with a Balanced Magnetic Circuit

Reliable switching is essential for the performance of a magnetic latching relay, and achieving this reliability requires a well-balanced magnetic circuit design. When the relay transitions between states, the magnetic field must actuate the armature to reliably switch positions. Balancing the magnetic circuit to achieve reliable switching involves optimizing the core material, coil design, and armature interaction.

To ensure reliable switching, the core material must be carefully selected to provide the necessary magnetic flux for actuating the armature. High permeability and saturation characteristics are essential in maintaining a strong magnetic field for reliable switching. Additionally, the design of the coil must produce sufficient magnetic field strength to overcome any resistance and reliably actuate the armature.

The interaction between the armature and the magnetic field is critical in achieving reliable switching. Properly designing the armature to respond to the magnetic field produced by the coil ensures that the relay can smoothly transition between states. Balancing the armature's design with the magnetic circuit's overall geometry is essential for achieving reliable switching.

By balancing the magnetic circuit design, including core material selection, coil design, and armature interaction, designers can ensure reliable switching in a magnetic latching relay. This reliability is crucial for the relay's performance in electronic systems, providing seamless operation and functionality.

Optimizing the Magnetic Circuit for Performance and Efficiency

In addition to achieving stable state retention and reliable switching, it is essential to optimize the magnetic circuit design for overall performance and efficiency. Balancing the magnetic circuit to achieve performance and efficiency involves considering factors such as power consumption, response time, and overall system integration.

Optimizing the magnetic circuit for efficiency requires careful consideration of the coil design. The number of turns in the coil and the current passing through it directly impact power consumption. By optimizing the coil design to minimize power consumption while still providing sufficient magnetic field strength, designers can enhance the relay's efficiency.

Response time is another critical factor in optimizing the magnetic circuit design. The time it takes for the relay to transition between states greatly impacts overall system performance. Balancing the magnetic circuit to reduce response time involves optimizing the core material, coil design, and overall circuit geometry to minimize magnetic flux leakage and maximize actuation speed.

Overall system integration is crucial in optimizing the magnetic circuit design. By considering how the relay fits into the larger electronic system, designers can balance the magnetic circuit to ensure seamless integration and compatibility. This includes considerations such as physical size, mounting options, and environmental factors.

By carefully balancing the magnetic circuit design to optimize performance and efficiency, designers can ensure that the magnetic latching relay meets the requirements of the overall electronic system. This optimization enhances the relay's functionality and reliability, providing a high-performing component for electronic applications.

Conclusion

In conclusion, designing a magnetic latching relay involves balancing the magnetic circuit to ensure stable state retention and reliable switching. Understanding the principles of magnetic circuits and their components is essential in achieving this balance. By carefully considering factors such as core material selection, coil design, and armature interaction, designers can create a high-performing relay that meets the requirements of electronic systems.

Balancing the magnetic circuit for stable state retention involves optimizing the core material, coil design, and overall circuit geometry to maintain a strong magnetic field. Achieving reliable switching requires careful consideration of core material selection, coil design, and armature interaction to smoothly transition between states. Optimizing the magnetic circuit for performance and efficiency involves minimizing power consumption, reducing response time, and ensuring seamless system integration.

By addressing these considerations and balancing the magnetic circuit design, designers can create magnetic latching relays that provide stable state retention, reliable switching, and high overall performance in electronic systems.

Introduction
In modern automation and industrial control applications, control cabinets are becoming increasingly compact. Especially in PLC systems, robotic control cabinets, and high-density distribution panels, how to achieve efficient and reliable electrical control within limited space has become a common challenge for design engineers. Traditional relays are often too bulky for high-density installation. That’s why slim relays (Slim Relays) are gradually becoming the ideal solution in the field of industrial automation.



What is a Slim Relay?

A slim relay is an electromagnetic relay specially designed for compact control cabinets. Its main features include:



Compact design: Typically only 6.2mm–12mm thick, perfect for high-density installations;



Stable performance: High dielectric strength and long electrical life, suitable for frequent operations in industrial environments;



Standardized interface: Compatible with universal sockets (such as 41F-1Z-C2 and 41F-1Z-C4 series) for easy installation and replacement;



Multiple contact configurations: Supports 1 Form A / 1 Form C to meet different control needs.



Compared to traditional relays, slim relays have significant advantages in space-saving, simplified wiring, and improved system reliability.






Learn more: What is a Relay Module? – RY-ELE I/O 4-in-1 Relay Module for Industrial Automation
















Why Choose Slim Relays in Control Cabinets?

1. Space-Saving Design
When a control cabinet needs to accommodate a large number of I/O interfaces, slim relays can effectively reduce the footprint, making the design more compact and tidy.




2. Reduced Wiring Complexity
With standardized relay sockets and terminal modules, engineers can quickly complete installation and maintenance, while reducing wiring errors.



3. Enhanced System Reliability
RY-ELE slim relays (such as the RY41F Series) are made with high-quality contact materials and durable electromagnetic structures, ensuring stable operation even after hundreds of thousands of cycles.



4. Versatile Industry Applications
Slim relays are widely used in:



Industrial automation control cabinets



Robotics and smart manufacturing equipment



Solar inverters and renewable energy applications



Elevator control systems



Packaging machinery and CNC machines







Advantages of RY-ELE Slim Relays

As a professional relay manufacturer, RY-ELE provides a wide range of slim relay products with the following advantages:



6.2mm Ultra-Slim Design: Perfect for high-density installations, helping engineers fit more functions into limited space;



Complete Certifications: Products comply with CE, RoHS, UL, and other international standards for reliable global use;



Long Life & High Performance: Electrical life exceeds 100,000 operations with strong insulation and dielectric strength;



One-Stop Solutions: Matching sockets (RYF series), terminal modules, and customized solutions are available to meet diverse customer needs.





Selection Guide: How to Choose the Right Slim Relay?

When selecting a slim relay, engineers should focus on the following parameters:



Rated Current & Load Type: Common ranges are 6A–12A; choose according to load type (motors, heaters, signal control);



Contact Configuration: Select 1A/1C depending on control circuit needs;



Dielectric Strength: Ensure the relay meets the system’s isolation requirements;



Certifications: For export projects, ensure UL, CE, and RoHS compliance;



Installation Method: Whether paired with sockets or DIN-rail mounted modules.



Conclusion

With the rapid development of industrial automation and smart manufacturing, slim relays have become an essential choice for high-density control cabinet design. Through independent R&D and strict quality control, RY-ELE provides global customers with high-performance, certified slim relay solutions. Whether in factory automation, elevator control, or renewable energy inverter projects, RY-ELE slim relays help you save space, improve efficiency, and ensure stable system operation.



Want to learn more about product specifications or request samples? Visit the RY-ELE Official Website for detailed information.




Learn more:What is the Purpose of an Electrical Relay? | Industrial Relay Applications & Benefits
Learn more: What is the Function of a Relay in Electronic Circuits? | RY-ELE Industrial Relays

Introduction
Selecting the right relay socket is just as important as choosing the relay itself.Whether you're designing a compact PCB board, building an industrial control cabinet, or wiring field automation systems, the socket determines how easily your relay connects, how safely it operates, and how efficiently it can be maintained.

In this guide, we compare the three most common types of relay sockets — PCB, screw type, and push-in (spring clamp) — to help you choose the best solution for your control panel.




Why the Relay Socket Matters
A relay socket (or relay base) provides the interface between the relay and the electrical system. It allows for plug-in mounting, easier maintenance, and electrical isolation from high-voltage circuits.

Using a quality socket ensures:



Stable and low-resistance electrical contact



Safe handling during relay replacement



Reduced wiring time during installation



Compatibility with multiple relay types




In short, the right socket improves reliability, saves labor, and protects your investment in automation equipment.



PCB Relay Socket — Compact and Cost-Effective
Overview
PCB (Printed Circuit Board) relay sockets are designed to be soldered directly onto circuit boards, making them ideal for compact control modules, electronic devices, or automation boards.

Key Features


Direct PCB mounting without additional wiring



Short signal path for minimal voltage drop



Low-profile design for compact layouts



Suitable for relays with 2A–10A contact ratings



Advantages
✅ Best space utilization✅ Cost-efficient for mass production✅ Reliable for low-current or signal applications

Limitations
❌ Not ideal for frequent relay replacement❌ Requires soldering for installation❌ Limited mechanical strength for large power relays

-Best For: PCB control boards, signal relays, or embedded devices where size and simplicity matter.







Screw Type Relay Socket — Reliable and Widely Used
Overview
Screw terminal relay sockets are the most traditional and widely used type, offering a solid and secure connection through screw clamps.

Key Features


Strong mechanical fastening



Suitable for relays with higher current ratings (up to 10–16A)



Compatible with DIN35 rail mounting



Easy to visually inspect and test connections



Advantages
✅ Proven reliability under vibration and load✅ Easy to replace relays without rewiring✅ Compatible with most Omron, Finder, and RY-ELE relays

Limitations
❌ Requires tools (screwdriver) for installation❌ Slightly slower wiring compared to push-in type

-Best For: Industrial control cabinets, automation systems, HVAC, and power distribution panels.




RY-ELE's European relay socket series uses nickel-plated copper terminals and PA66 flame-retardant housing to ensure strong clamping force and long-term stability.







Push-in (Spring Clamp) Relay Socket — Fast and Maintenance-Free
Overview
Push-in or spring-clamp relay sockets represent the next generation of wiring technology.They allow wires to be inserted directly without tools — providing fast, vibration-resistant connections.

Key Features


Tool-free wiring via spring mechanism



Vibration-proof and maintenance-free design



Time-saving installation — up to 70% faster than screw type



Excellent for control cabinets with frequent maintenance



Advantages
✅ Quick wiring and disconnection✅ Consistent contact pressure over time✅ Ideal for compact, high-density wiring

Limitations
❌ Slightly higher cost than screw type❌ Requires precise wire stripping for best performance

-Best For: Automation production lines, machinery control cabinets, and field terminals where speed and reliability are critical.




RY-ELE push-in sockets are designed with reinforced spring mechanisms that maintain constant contact pressure, even under vibration and temperature variation.






Comparison Overview





Feature
PCB Socket
Screw Type Socket
Push-in Socket




Mounting Method
Direct on PCB
DIN rail or panel
DIN rail


Installation Speed
Medium
Slow
Fastest


Maintenance
Requires soldering
Manual screw tightening
Tool-free


Vibration Resistance
Moderate
Good
Excellent


Load Capacity
Low to Medium
Medium to High
Medium to High


Replacement Ease
Limited
Easy
Very Easy


Best For
PCB control boards
Industrial panels
High-speed wiring systems







RY-ELE Relay Socket Solutions
At RY-ELE, we design and manufacture all three types of relay sockets to fit global automation standards:



PCB relay bases – for compact boards and OEM modules



Screw-type European relay sockets – for industrial relays such as RXS, RYER, RY41F



Push-in spring terminal sockets – for high-density control cabinets and fast installation needs



All RY-ELE relay sockets feature:



High-temperature PA66 insulation (UL94 V0 rated)



Nickel-plated terminals for stable conductivity



LED indicator options for relay operation status



Compliance with CE, RoHS, ISO9001 standards




With over 15 years of relay component manufacturing experience, RY-ELE provides reliable, standardized, and easy-to-install socket solutions for industrial and OEM applications worldwide.





How to Choose the Right Type





Your project type
Recommended Socket
Reason




PCB Control Board
PCB Type
Compact and soldered directly on board


Factory Control Cabinet
Screw Type
Reliable and easy to maintain


High-Speed Wiring or Frequent Replacement
Push-in Type
Fast installation, tool-free maintenance




Pro Tip:If your system requires frequent relay replacement or on-site maintenance, the push-in socket provides the best long-term efficiency.If you prioritize maximum reliability and compatibility with high-current relays, the screw-type socket remains the trusted standard.




Conclusion
Whether you choose a PCB, screw type, or push-in relay socket, the key is selecting a product that aligns with your application environment, wiring method, and maintenance needs.



PCB sockets are perfect for compact control boards.



Screw type sockets are the universal choice for stable, long-lasting connections.



Push-in sockets deliver the fastest and most convenient installation.



RY-ELE offers a complete relay socket portfolio designed for global standards, ensuring safety, reliability, and flexibility in every connection.

Explore the full range at the RY-ELE Official Website.