Mersen GP25 Fuse GP - Plug - Fast-Acting 125VAC 25A Screw Visual Indicator
Alternate Item Number: GP25
UPC: 068938838065
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Overview
- 25A fast-acting fuse rated for 125VAC applications
- Screw-type plug design for standard fuse holders
- Built-in visual indicator for quick blown-fuse identification
- Compact 10 x 38mm (1-1/2" x 13/32") midget fuse size
- Operates efficiently from -40°C to +85°C with low 3W watt loss
Specifications
AC Voltage Rating | 125 V |
Amperage Rating | 25 A |
Application | Industrial and residential;Receptacle and lighting circuits |
Body Material | Glass |
Brand Name | Mersen |
Class | Plug |
Connection | Screw |
Connection Material | Brass |
Family Code | 145 |
Family Description | Plug Fuse W |
Interrupt Rating | 10 kA |
Material | Screw In |
Mounting | Screw |
Response Time | Fast-Acting |
Size | 1.29 x 1.13;32.766 x 28.6 in;mm |
Special Features | Available in both time-delay and non time-delay;For Canadian market, available in Type "P" and Type "D" |
Standard | UL Listed Guide JEFV, File E76208 CSA Certified Class 142301, File 15525 |
Standard | UL |
Type | Plug Fuses |
Type Of Indicators | Visual Indicator |
Voltage Rating | 125 VAC |
Package Dimensions (L x W x H) | 1.29 in x 1.13 in x 1.13 in |
Package Dimensions (L x W x H) | 32.766 mm x 28.6 mm x 28.6 mm |
Package Weight (Imperial) | 0.060 lb |
Package Weight (Metric) | 0.027 kg |

SAO1.25
The National Electric Code now permits Edison-base fuses to be used only for replacements in existing installations, and then, only when there is no evidence of overfusing or tampering. All new Edison-based fuseholders must have Type S fuse adapters installed before they are placed in service. Designed to prevent installation of wrong size fuses, Type S Adapters (SAO series) screw into Edison-base fuseholders so they may accept Type S fuses. Once installed the adapters cannot be removed. To prevent shunting of open fuses or overfusing, and to reduce nuisance fuse opening, it is recommended that SAO adapters with properly rated SLO or SOO series fuses be installed in all Edison-base fuseholders.
G10
Mersen plug fuses are intended for industrial and residential applications. Non time-delay fuses are available for receptacle and lighting circuits and time-delay fuses for motor loads. For Canadian requirements, a type ",P", fuse is used for non-motor loads and Type ",D", for electrical heating and cyclical load circuits. Both fuses have low melting-point temperature elements. Type ",S", plug fuses are time-delay and tamper resistant. 1500 Volts 10 Amps G series.
GT15
Mersen plug fuses are intended for industrial and residential applications. Non time-delay fuses are available for receptacle and lighting circuits and time-delay fuses for motor loads. For Canadian requirements, a type P fuse is used for non-motor loads and Type D, for electrical heating and cyclical load circuits. Both fuses have low melting-point temperature elements. Type S plug fuses are time-delay and tamper resistant. 125 Volts 15 Amps GP series. 125 Volts 15 Amps GT series.
GT20
Mersen plug fuses are intended for industrial and residential applications. Non time-delay fuses are available for receptacle and lighting circuits and time-delay fuses for motor loads. For Canadian requirements, a type P fuse is used for non-motor loads and Type D, for electrical heating and cyclical load circuits. Both fuses have low melting-point temperature elements. Type S plug fuses are time-delay and tamper resistant. 125 Volts 15 Amps GP series. 125 Volts 20 Amps GT series.
GT25
Mersen plug fuses are intended for industrial and residential applications. Non time-delay fuses are available for receptacle and lighting circuits and time-delay fuses for motor loads. For Canadian requirements, a type P fuse is used for non-motor loads and Type D, for electrical heating and cyclical load circuits. Both fuses have low melting-point temperature elements. Type S plug fuses are time-delay and tamper resistant. 125 Volts 15 Amps GP series. 125 Volts 25 Amps GT series.Frequently Asked Questions
What is the voltage rating for Mersen Plug Fuses?
Mersen Plug Fuses have a voltage rating of 125VAC.
What is the amperage range for these plug fuses?
The amperage rating for these fuses ranges from 3 to 30 Amps.
What is the interrupting rating (IR) for Mersen Plug Fuses?
The interrupting rating for these fuses is 10kA I.R. AC.
Are these fuses CSA Certified?
Yes, these fuses are CSA Certified under Class 142301, File 15525.
What types of base are available for these plug fuses?
These fuses are available with an Edison Base and come in Types 'P' or 'D'.
What is the purpose of Type S adaptors?
Type S adaptors screw into the Edison base and allow Type S fuses to be installed, preventing the use of the wrong ampere size.
What is the difference between Type 'P' and Type 'D' fuses in Canada?
In Canada, Type 'P' fuses are for non-motor loads, and Type 'D' fuses are for electric heating and cycling loads.
What are Mersen Plug Fuses used for?
Mersen Plug Fuses are suitable for industrial and residential applications, including receptacle and lighting circuits.
What are Low-Temp time delay plug fuses designed for?
Low-Temp time delay plug fuses have thermal sensitivity and are designed for cycling loads and motor circuits.
Frequently Asked Questions about Mersen
What industries and applications are Mersen products used for?
Mersen products are used across diverse industrial sectors including solar power, electric vehicles, buildings/construction, industrial automation, power distribution, HVAC, elevators, telecommunications, and specialty manufacturing. Key application areas include circuit protection, surge protection, battery module protection, electrical safety systems, and power management for residential, commercial, and utility-scale installations.
What are the main product lines offered by Mersen?
Mersen offers five primary electrical power product lines: IEC and UL/CSA Fuses and Fusegear, Surge Protection, Low Voltage Disconnect Switches, Power Distribution Blocks, and Engineered Solutions. Their comprehensive range includes specialized components like high-speed fuses, modular fuse holders, surge arresters, and custom-engineered electrical protection systems for industrial and power management applications.
What are the key features of Mersen products?
Mersen products feature advanced electrical protection and power management solutions with key characteristics including finger-safe design, compact modularity, and high-performance safety features. Their product lines span electrical power components like fuses, surge protection, power distribution blocks, and specialized solutions for industrial, solar, and building applications. Critical features include UL/CSA approvals, high short-circuit current ratings, and innovative technologies like the Fuse Control™ program that minimize electrical risks and optimize system performance.
What environmental ratings do Mersen products have?
Mersen products meet rigorous environmental ratings across multiple standards, including UL 508A Type 1, 2, 3, 4, 4X, 12, and 13, CSA Type 1, 2, 3, 4, 4X, 12, and 13, and NEMA Type 1, 2, 3, 4, 4X, 12, and 13. They feature IEC 60529 IP66 protection, with enhanced UV inhibitors for outdoor weathering and operating temperatures ranging from -40°C to 130°C (-40°F to 266°F). These ratings ensure superior protection in wet, corrosive, and challenging industrial environments.
What accessories are available for Mersen products?
Mersen offers multiple accessories for their fuse blocks and systems, including safety pullers (DFC3M and DFC3LP), DIN-rail adapters (DRM), bus bars, auxiliary contacts, and specialized mounting hardware. Key accessories include the DFC3M safety puller for 1-1/2" x 13/32" midget or Class CC fuses, the DRM adapter for mounting 303 series fuse blocks on DIN-rail, and UltraSafe fuse module accessories like bus bars and auxiliary contacts that enable module interconnection and monitoring.
How are Mersen products typically installed?
Mersen products are typically installed in electrical distribution systems, control panels, and industrial automation environments using multiple mounting options. These include service entrance panel mounting, distribution panel installation, control panel DIN rail mounting, and custom engineered solutions like Fused Coordination Panelboards. Installation depends on the specific product type, such as fuses, surge protective devices, or switches, and is designed to provide electrical protection and circuit safety in various industrial and commercial applications.
What certifications and standards do Mersen products comply with?
Mersen products are certified to multiple international standards, including UL (Underwriters Laboratories), CSA (Canadian Standards Association), CCC (China Compulsory Certification), and EAC (Eurasian Conformity). Our products meet rigorous safety and performance standards for industrial applications across North America, China, Russia, and other global markets, ensuring compliance and reliability in electrical power and advanced materials solutions.
What technical support does Mersen offer?
Mersen provides comprehensive technical support through multiple channels, including technical experts located in your time zone who can assist with product selection, application guidance, and troubleshooting. Their Fuse Control™ program offers a free Fuse Inventory Audit & Analysis, and customers can access technical resources through their sales representatives and online platform ep.mersen.com.






