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Home / News / Industry News / FH12 40A Power Relay for Industrial Control, Spot Welding & Power Supply Equipment
Content
- 1 1. Key Features of the FH12 Power Relay
- 2 2. Technical Specifications
- 3 3. Performance
- 4 4. Available Coil Voltages
- 5 5. Typical Applications
- 6 6. Safety Certifications
- 7 7. Frequently Asked Questions (FAQ)
- 7.0.1 Q1: What is the maximum switching current of the FH12 Power Relay?
- 7.0.2 Q2: What contact arrangements are available?
- 7.0.3 Q3: What coil voltage options are available?
- 7.0.4 Q4: What contact materials are available?
- 7.0.5 Q5: What operating temperature does the FH12 support?
- 7.0.6 Q6: What certifications does the FH12 have?
- 8 8. Conclusion
The FH12 Power Relay is designed for high-current switching in industrial control, spot welding machines, and power supply equipment. Featuring a maximum switching current of 40A, dielectric strength of 2500VAC between the coil and contacts, and a Class F UL insulation system, the FH12 provides reliable electrical performance for demanding industrial applications. Available in both plastic sealed and flux-proof constructions, it can be selected according to different operating environments.
1. Key Features of the FH12 Power Relay
40A Switching Capability
The FH12 supports a maximum switching current of 40A with a maximum switching capacity of 7500VA, making it suitable for applications requiring reliable high-current switching.
Reliable Electrical Insulation
The relay provides an insulation resistance of 1000MΩ (500VDC) and a dielectric strength of 2500VAC between the coil and contacts, helping maintain safe electrical isolation during operation.
Multiple Contact Configurations
The FH12 is available in three contact arrangements: 1A (Normally Open), 1B (Normally Closed), and 1C (Changeover).
allowing users to select the appropriate configuration for different circuit designs.
Plastic Sealed or Flux-Proof Construction
Two construction options are available: flux-proof and plastic sealed.
According to the datasheet, the flux-proof version is recommended for clean environments, while the plastic sealed version is suitable for environments containing dust or corrosive gases such as H₂S, SO₂, and NO₂.
Class F Insulation System
The FH12 complies with the UL Class F insulation system, meeting international insulation requirements for industrial electrical equipment.
2. Technical Specifications
3. Performance
The FH12 is designed to provide consistent electrical and mechanical performance under specified operating conditions.
Electrical Performance
- Insulation resistance: 1000MΩ (500VDC)
- Dielectric strength between open contacts: 1500VAC for 1 minute
- Dielectric strength between coil and contacts: 2500VAC for 1 minute
Operating Speed
- Operate time: ≤15ms
- Release time: ≤10ms
Mechanical Performance
- Functional shock resistance: 98m/s² (10G)
- Destructive shock resistance: 980m/s² (100G)
- Vibration resistance: 10Hz–55Hz, 1.5mm double amplitude
Service Life
- Mechanical endurance: 1 × 10⁶ operations
- Electrical endurance:
- 30A 250VAC:5 × 10⁴ operations
- 40A 250VAC:2 × 10⁴ operations
4. Available Coil Voltages
The FH12 supports multiple DC coil voltage options, including:
5V, 6V, 9V, 12V, 15V, 18V, 24V, 36V, 48V, and 110V DC, allowing the relay to match different system voltage requirements.
5. Typical Applications
According to the product datasheet, the FH12 is primarily designed for:
Suitable for industrial control equipment requiring reliable switching of high-current loads.
Spot Welding Machines
Designed for spot welding equipment where stable relay switching performance is required.
Power Supply Equipment
Applicable to power supply equipment requiring dependable switching performance within the specified electrical ratings.
6. Safety Certifications
The FH12 has obtained multiple safety approvals, including:UL / cUL ,TÜV ,CQC
The approved ratings vary depending on the contact arrangement and contact material.
7. Frequently Asked Questions (FAQ)
Q1: What is the maximum switching current of the FH12 Power Relay?
The FH12 supports a maximum switching current of 40A and a maximum switching capacity of 7500VA.
Q2: What contact arrangements are available?
The relay is available in 1A (Normally Open), 1B (Normally Closed), and 1C (Changeover) contact configurations.
Q3: What coil voltage options are available?
The FH12 supports DC coil voltages of 5V, 6V, 9V, 12V, 15V, 18V, 24V, 36V, 48V, and 110V.
Q4: What contact materials are available?
The relay offers AgNi and AgSnO₂ contact materials. According to the datasheet, AgSnO₂ contacts are recommended for applications with high surge current.
Q5: What operating temperature does the FH12 support?
The specified ambient operating temperature is -40°C to +85°C, with an operating humidity range of 5% to 90%.
Q6: What certifications does the FH12 have?
The FH12 has obtained UL/cUL, TÜV, and CQC safety certifications, with approved ratings depending on the product configuration.
8. Conclusion
The FH12 40A Power Relay combines high switching capacity, reliable electrical insulation, multiple contact configurations, and flexible construction options in a compact design. Supporting DC coil voltages from 5V to 110V and certified by UL/cUL, TÜV, and CQC, it is designed for industrial control, spot welding machines, and power supply equipment within its specified operating conditions.
For additional technical information, ordering details, or product selection support, please contact Fanhar Electronics for the latest FH12 product documentation and application assistance.
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