RT18-125 Fuse Holder Overview
The GA&DA RT18-125 fuse holder is designed for the installation and isolation of standard 22x58mm cylindrical fuse links in low-voltage electrical distribution and industrial control systems.
With a rated operational current of up to 125A, the RT18-125 offers the highest current capacity among the RT18-32, RT18-63 and RT18-125 fuse holder models in this product range.
The product features a modular structure for DIN rail installation, allowing convenient integration into distribution boards, switchboards, industrial electrical cabinets and OEM electrical assemblies.
Current product image configurations include:
- RT18-125 1P
- RT18-125 2P
The combination of a 125A current rating and 22x58mm cylindrical fuse compatibility makes the RT18-125 particularly suitable for electrical applications requiring higher current capacity while maintaining convenient fuse replacement and modular panel installation.
Key Features of the RT18-125 Fuse Holder
125A Rated Operational Current
The RT18-125 supports a rated operational current of up to 125A, making it suitable for higher-current low-voltage circuit protection applications.
Standard 22x58mm Fuse Compatibility
This RT18-125 fuse holder is designed for standard 22x58mm cylindrical fuse links.
The larger fuse format provides a suitable solution for applications requiring greater current capacity than 10x38mm and 14x51mm cylindrical fuse systems.
DIN Rail Installation
The RT18-125 features a modular DIN rail mounting structure, simplifying installation inside electrical distribution boards and industrial control cabinets.
4–50mm² Wiring Range
The specified wiring range is 4–50mm², supporting cable sizes commonly used in higher-current electrical distribution applications.
High Breaking Capacity with Fuse
When used with an appropriately selected fuse link, the RT18-125 provides a specified breaking capacity of:
- 100kA at 500V AC
- 50kA at 690V AC
This supports reliable overcurrent and short-circuit protection in low-voltage electrical systems.
690V Application Capability
The RT18-125 base size data specifies a rated voltage of up to 690V, allowing the product to be used in a wide range of industrial low-voltage systems.
IP20 Protection
The RT18-125 has an IP20 protection degree and is intended for installation inside suitable electrical panels, distribution boards and protective enclosures.
Technical Specifications of RT18-125 Fuse Holder
| Parameter | Specification |
|---|---|
| Brand | GA&DA |
| Series | RT18 |
| Model | RT18-125 |
| Product Type | Cylindrical Fuse Holder / AC Fuse Base |
| Rated Operational Current (Ie) | 125A |
| Applicable Fuse Size | 22x58mm |
| Current Product Options | 1P / 2P |
| Rated Operational Voltage (Ue) | 400/690V AC |
| Maximum Rated Voltage | 690V |
| Rated Insulation Voltage (Ui) | 800V |
| Rated Impulse Withstand Voltage (Uimp) | 6kV |
| Wiring Range | 4–50mm² |
| Mounting Method | DIN Rail Installation |
| Breaking Capacity with Fuse | 100kA at 500V AC / 50kA at 690V AC |
| Utilization Category | AC-20B |
| IP Degree | IP20 |
| Reference Standard | IEC 60269-2 / UL 248-19 |
RT18-125 Dimensions
According to the supplied GA&DA product catalogue, the RT18-125 series has the following reference dimensions:
| Dimension | Size |
| A1 | 126mm |
| A2 | 134mm |
| B | 36mm |
| H1 | 78mm |
| H2 | 104mm |
| Applicable Fuse Size | 22x58mm |
| Rated Current | 125A |
| Rated Voltage | 690V |
These dimensions provide a reference for panel builders and engineers when planning installation space inside distribution boards and electrical control cabinets.
Available RT18-125 Models
For the current website product range, the following configurations can be presented:
| Model | Pole | Fuse Size | Rated Current |
| RT18-125/1P | 1P | 22x58mm | 125A |
| RT18-125/2P | 2P | 22x58mm | 125A |
The 1P and 2P options allow buyers to select the appropriate configuration according to circuit layout and panel requirements.
Additional RT18-125 Models Listed in the Catalogue
The supplied GA&DA catalogue also lists additional RT18-125 series configurations:
| Model | Pole | Indicator | Order Code |
| RT18-125/1P | 1P | No | 220216 |
| RT18-125Z/1P | 1P | Yes | 220217 |
| RT18-125/2P | 2P | No | 220218 |
| RT18-125Z/2P | 2P | Yes | 220219 |
| RT18-125/3P | 3P | No | 220220 |
| RT18-125Z/3P | 3P | Yes | 220221 |
| RT18-125/4P | 4P | No | 220222 |
Availability of these additional configurations should be confirmed before ordering.
Applications of the RT18-125 Fuse Holder
The RT18-125 22×58 fuse holder is designed for higher-current low-voltage electrical protection and distribution applications.
Typical applications include:
- Industrial distribution boards
- Electrical switchboards
- Industrial control panels
- Machinery and equipment protection
- Power distribution equipment
- Factory automation systems
- Electrical control cabinets
- Commercial electrical distribution
- OEM electrical assemblies
- Industrial power systems
- Panel building applications
Compared with smaller 32A and 63A cylindrical fuse holders, the RT18-125 provides a 125A rated current capacity and supports the larger 22x58mm cylindrical fuse format.
This makes it particularly suitable for applications where higher current capacity is required while retaining modular DIN rail installation.
Why Choose the GA&DA RT18-125 Fuse Holder?
For electrical distributors, panel builders and industrial equipment manufacturers, selecting the correct fuse holder involves more than matching the fuse size.
Current rating, cable capacity, mounting method and available installation space must also be considered.
The GA&DA RT18-125 provides:
- 125A rated operational current
- Standard 22x58mm cylindrical fuse compatibility
- 1P and 2P current product options
- DIN rail mounting
- 4–50mm² wiring range
- Rated voltage up to 690V
- 800V rated insulation voltage
- 6kV impulse withstand voltage
- IP20 protection
- High breaking capacity when used with a suitable fuse
- Compact modular structure
- Bulk order support
- OEM and project supply support
For distributors, wholesalers, panel manufacturers or OEM buyers requiring a 125A cylindrical fuse holder, GA&DA can provide suitable RT18-125 solutions according to your required configuration and purchase quantity.
Contact us with your required model, fuse size and quantity for technical support and quotation.
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