FH53 Power Relay
Views: 935  Author: Fanhar Relay  Time: 2025.10.20

In today's pursuit of miniaturized and intelligent devices, every millimeter of PCB space is invaluable. The FH53 ultra-thin relay was born for this purpose. Thanks to its powerful switching capability, ultra-thin design and outstanding electrical performance, it is the ideal way to boost your product's competitiveness and reliability.



Core Advantages


Small Size, Big Power

The FH53 is just 5mm wide. It achieves a load current switching capacity of up to 6A. Applications with limited space, such as industrial PLC modules, smart home main control boards, and air conditioner controllers, benefit greatly from this "punching above its weight" design. It empowers engineers to optimize layouts and achieve more compact product designs.


Rock-Solid Reliability

Safety is the essential foundation of a relay.  Although it can withstand surge voltage shocks up to 6,000V, the FH53's insulation strength between the coil and contacts is an impressive 4000V AC.This provides robust electrical isolation for your equipment, effectively preventing high-voltage interference to ensure stable system operation and user safety.


Highly Responsive, Energy-Efficient

The FH53, being a high-sensitivity model, has a rated power consumption of just 0.17W (about 170mW). This enables effortless operation in low-power circuits and contributes to reduced overall system energy consumption. Its particular suitability for battery-powered applications and green products with stringent energy efficiency requirements makes it a valuable asset.


Rapid Response, Precise Control

The FH53's lightning-fast response to control signals makes rapid circuit switching possible, with a response time of just 8ms to pick up and 4ms to release. This is crucial for applications requiring precise timing control, such as automation equipment and pulse counting.


In-Depth Analysis: FH53's Performance Profile


Dependable Load Control: With a maximum switching capacity of 1500 VA, it can easily handle resistive loads of up to 6 A at 250 V AC or 30 V DC, This is more than enough power for most small- to medium-sized devices.

Long Lifespan and High Durability: With an underrated load, the electrical life can reach up to 60,000 operations (1 A contact), while the mechanical life can exceed 100,000 cycles, ensuring long-term reliability and reduced maintenance.

Wide Environmental Adaptability:It works well in difficult outdoor situations or in hot equipment enclosures at temperatures between -40°C and +85°C and humidity levels between 5% and 90%.



Flexible Configuration Options


Contact Configuration: Offers 1A (Normally Open) and 1C (Changeover) options to accommodate diverse circuit logic requirements.

Encapsulation Process: Available in solder mask type (suitable for clean environments) and plastic sealed type (suitable for industrial environments containing pollutants like H₂S and SO₂), addressing multiple operational scenarios.

Coil voltage: It works with a wide range of control circuits thanks to its support for many standard voltages, including DC 5V to DC 60V.



Application Scenarios


With its versatile performance, the FH53 is widely used in:

Home Appliances: Compressor and pump control for air conditioners, washing machines, and dishwashers.

Industrial Control: PLC output modules. Compact motor drives. Solenoid valve regulation.

Communication Equipment: Base station power switching, device redundancy backup circuits.

Smart Buildings: Security alarm systems, smart meters, fire protection equipment control.

New Energy: Auxiliary power for photovoltaic inverters, charging station control modules.


Helpful Guide: How to Select and Order Correctly?


Choosing the right relay is key to project success. The FH53 uses a clear naming convention for its models. This makes it easy to identify the necessary product.

Model Example: FH53-1A-S-T-DC12V

FH53: Product Series

1A: Contact Form (1A for normally open, 1C for changeover)

S: Construction (S for plastic-sealed, no marking for solder mask type)

T: Contact Material (T for AgSnO₂ with high arc resistance; no marking for AgNi)

DC12V: Coil Rated Voltage



Conclusion


Engineers who need to switch power in limited locations will find the FH53 ultra-thin relay to be a reliable choice.  It possesses a compact physical design, strong electrical performance, and adaptable product configurations. Whether your design objectives involve enhancing power density, boosting system reliability, or adapting to complex environmental conditions, the FH53 delivers proven performance to serve as a robust and efficient component in your designs.

We are committed to providing high-performance, reliable electronic components and look forward to contributing to the success of your products.   

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