RT18-125 | 125 Amp Electrical Fuse for Circuit Protection
RT18-125 | 125 Amp Electrical Fuse for Circuit Protection
Dimensions:22 x 58mm
Volts:400Vac-690Vac
Amps:10A,16A,20A,25A,32A,40A,50A,63A,80A,100A,125A
Breaking Capacity: 100 kA
Time Constant: 1-3 ms
Standard: IEC 60269
Dimensions:22 x 58mm
Volts:400Vac-690Vac
Amps:10A,16A,20A,25A,32A,40A,50A,63A,80A,100A,125A
Breaking Capacity: 100 kA
Time Constant: 1-3 ms
Standard: IEC 60269
1. Product Overview
The RT18-125AM is a high-capacity DIN rail mountable fuse holder engineered for use with standard 22x58mm cylindrical fuses. Designed for industrial and commercial low-voltage AC systems up to 690V and 125A, this holder provides secure, reliable housing for fuses in power distribution panels, motor control centers, and automation equipment.
Built with flame-retardant plastic and robust screw terminals, the RT18-125AM ensures low-resistance contact and high thermal stability. Its compact, modular design allows for space-saving installation in high-density control cabinets, making it the ideal choice for protecting high-power circuits in industrial environments.
2. Key Features
- 22x58mm Compatibility: Designed for standard 22x58mm cylindrical fuses (gG/aM types).
- 125A / 690V AC Rating: Suitable for high-power low-voltage AC circuits in industrial applications.
- DIN Rail Mounting: Standard 35mm DIN rail design for easy installation in distribution panels and control cabinets.
- Flame-Retardant Housing: Heat-resistant plastic body (UL94 V-0) for enhanced safety and durability.
- Robust Screw Terminals: Secure screw-type terminals ensure low-resistance connections and prevent loose wiring.
- Modular & Space-Saving: Slim profile allows for multiple units to be mounted side-by-side in tight spaces.
- IEC60269 Compliant: Meets international standards for low-voltage fuse holders, ensuring reliable performance.
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | RT18-125AM |
| Rated Voltage | 690V AC |
| Rated Current | 125A |
| Fuse Size | 22x58mm cylindrical fuse |
| Mounting Type | 35mm DIN Rail |
| Terminal Type | Screw terminal |
| Housing Material | Flame-retardant engineering plastic (UL94 V-0) |
| Operating Temperature | -25°C ~ +85°C |
| Compliance | IEC 60269, GB13539, CE certified |
4. Working Principle
The RT18-125AM fuse holder safely houses and protects 22x58mm fuses in high-power low-voltage circuits:
- Normal Operation: The fuse conducts current through the holder’s terminals with minimal resistance.
- Overcurrent / Short-Circuit: When the fuse element melts, the holder’s robust structure safely contains the arc, preventing damage to surrounding equipment.
- Secure Connection: The screw terminals ensure a tight, low-resistance connection to the fuse, minimizing overheating at rated current.
- Circuit Protection: The holder provides physical isolation for the fuse, preventing accidental contact with live parts during operation or replacement.
5. Applications
- Industrial Power Distribution: Overcurrent protection for high-power branch circuits and distribution panels.
- Motor Control Centers: Protection for large motor circuits, pumps, and industrial machinery.
- Renewable Energy Systems: Large-scale solar combiner boxes and wind turbine auxiliary circuits.
- Commercial & Industrial Installations: Building distribution boards, HVAC systems, and elevator control panels.
- Heavy Machinery & Equipment: CNC machines, conveyor systems, and industrial machinery control circuits.
6. Installation & Operation Instructions
- Mounting: Snap the RT18-125AM holder onto a standard 35mm DIN rail inside the distribution panel or control cabinet.
- Wiring: Connect the line and load wires to the corresponding screw terminals, tightening them to the manufacturer’s recommended torque.
- Fuse Installation: Insert a 22x58mm fuse into the holder, ensuring it is fully seated and the cap is securely closed.
- Verification: Energize the circuit and confirm normal operation. If the fuse blows, disconnect power before replacing it with a new, correctly rated 22x58mm fuse.
7. Frequently Asked Questions (FAQ)
Q1: What size fuse does the RT18-125AM use?
It is designed for 22x58mm cylindrical fuses, suitable for high-power circuits up to 125A. It works with both general-purpose (gG) and motor circuit (aM) rated fuses.
Q2: What is the maximum current and voltage rating?
The holder is rated for 125A continuous current and 690V AC, making it suitable for most high-power industrial and commercial applications.
Q3: Can I use this fuse holder outdoors?
No, the RT18-125AM has an IP20 rating, designed for indoor use only. It must be installed inside a weatherproof enclosure for outdoor applications.
Q4: Is the RT18-125AM compatible with other brands of 22x58mm fuses?
Yes, it is fully compatible with all standard 22x58mm cylindrical fuses from major manufacturers.
Q5: Is this fuse holder CE certified?
Yes, the RT18-125AM complies with IEC 60269 and GB13539 standards and carries the CE mark, ensuring it meets international safety requirements for low-voltage electrical components.
8. Technical Documents & Support
- Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
- Contact our engineering team for custom pole configurations or OEM/ODM solutions for large-scale projects.
- Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
1. Product Overview
The RT18-125AM is a high-capacity DIN rail mountable fuse holder engineered for use with standard 22x58mm cylindrical fuses. Designed for industrial and commercial low-voltage AC systems up to 690V and 125A, this holder provides secure, reliable housing for fuses in power distribution panels, motor control centers, and automation equipment.
Built with flame-retardant plastic and robust screw terminals, the RT18-125AM ensures low-resistance contact and high thermal stability. Its compact, modular design allows for space-saving installation in high-density control cabinets, making it the ideal choice for protecting high-power circuits in industrial environments.
2. Key Features
- 22x58mm Compatibility: Designed for standard 22x58mm cylindrical fuses (gG/aM types).
- 125A / 690V AC Rating: Suitable for high-power low-voltage AC circuits in industrial applications.
- DIN Rail Mounting: Standard 35mm DIN rail design for easy installation in distribution panels and control cabinets.
- Flame-Retardant Housing: Heat-resistant plastic body (UL94 V-0) for enhanced safety and durability.
- Robust Screw Terminals: Secure screw-type terminals ensure low-resistance connections and prevent loose wiring.
- Modular & Space-Saving: Slim profile allows for multiple units to be mounted side-by-side in tight spaces.
- IEC60269 Compliant: Meets international standards for low-voltage fuse holders, ensuring reliable performance.
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | RT18-125AM |
| Rated Voltage | 690V AC |
| Rated Current | 125A |
| Fuse Size | 22x58mm cylindrical fuse |
| Mounting Type | 35mm DIN Rail |
| Terminal Type | Screw terminal |
| Housing Material | Flame-retardant engineering plastic (UL94 V-0) |
| Operating Temperature | -25°C ~ +85°C |
| Compliance | IEC 60269, GB13539, CE certified |
4. Working Principle
The RT18-125AM fuse holder safely houses and protects 22x58mm fuses in high-power low-voltage circuits:
- Normal Operation: The fuse conducts current through the holder’s terminals with minimal resistance.
- Overcurrent / Short-Circuit: When the fuse element melts, the holder’s robust structure safely contains the arc, preventing damage to surrounding equipment.
- Secure Connection: The screw terminals ensure a tight, low-resistance connection to the fuse, minimizing overheating at rated current.
- Circuit Protection: The holder provides physical isolation for the fuse, preventing accidental contact with live parts during operation or replacement.
5. Applications
- Industrial Power Distribution: Overcurrent protection for high-power branch circuits and distribution panels.
- Motor Control Centers: Protection for large motor circuits, pumps, and industrial machinery.
- Renewable Energy Systems: Large-scale solar combiner boxes and wind turbine auxiliary circuits.
- Commercial & Industrial Installations: Building distribution boards, HVAC systems, and elevator control panels.
- Heavy Machinery & Equipment: CNC machines, conveyor systems, and industrial machinery control circuits.
6. Installation & Operation Instructions
- Mounting: Snap the RT18-125AM holder onto a standard 35mm DIN rail inside the distribution panel or control cabinet.
- Wiring: Connect the line and load wires to the corresponding screw terminals, tightening them to the manufacturer’s recommended torque.
- Fuse Installation: Insert a 22x58mm fuse into the holder, ensuring it is fully seated and the cap is securely closed.
- Verification: Energize the circuit and confirm normal operation. If the fuse blows, disconnect power before replacing it with a new, correctly rated 22x58mm fuse.
7. Frequently Asked Questions (FAQ)
Q1: What size fuse does the RT18-125AM use?
It is designed for 22x58mm cylindrical fuses, suitable for high-power circuits up to 125A. It works with both general-purpose (gG) and motor circuit (aM) rated fuses.
Q2: What is the maximum current and voltage rating?
The holder is rated for 125A continuous current and 690V AC, making it suitable for most high-power industrial and commercial applications.
Q3: Can I use this fuse holder outdoors?
No, the RT18-125AM has an IP20 rating, designed for indoor use only. It must be installed inside a weatherproof enclosure for outdoor applications.
Q4: Is the RT18-125AM compatible with other brands of 22x58mm fuses?
Yes, it is fully compatible with all standard 22x58mm cylindrical fuses from major manufacturers.
Q5: Is this fuse holder CE certified?
Yes, the RT18-125AM complies with IEC 60269 and GB13539 standards and carries the CE mark, ensuring it meets international safety requirements for low-voltage electrical components.
8. Technical Documents & Support
- Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
- Contact our engineering team for custom pole configurations or OEM/ODM solutions for large-scale projects.
- Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
Related Products
Contact Us
Have questions about our products or services? Our team is here to help you with any inquiries.