AJT25 Mersen – Fuse AJT – Class J – Time-delay 600VAC 400VDC 25A Ferrule SmartSpot® Amp-Trap 2000®
9,95$
AJT Amp-Trap 2000® fuses provide IEC Type 2 protection and optimal current limitation. Compact and reliable, they are suitable for motor circuits and 600 VAC applications, with or without SmartSpot®. Product unavailable? We offer an equivalent model.
58 in stock (can be backordered)
| Weight | 0,044 g |
|---|---|
| Dimensions | 57,2 × 20,7 mm |
| Product Type |
Fuse |
| Type/Class |
J |
| Serie |
AJT (1A@60A) |
| Speed/Characteristic |
Time-Delay |
| Amperage |
25a |
| Voltage |
600v |
| Courant de court-circuit (SCCR) |
200kAac/100kAdc |
| Indicator |
SmartSpot |
| Approbation |
CSA,UL |
⚡ AJT25 Mersen | Class J Fuse – Time-Delay 600VAC / 400VDC 25A – Amp-Trap 2000® Series with SmartSpot® Indicator
Discover the AJT25 Mersen Class J fuse, a time-delay model made to protect your circuits. It gives steady and reliable performance, even in tough industrial conditions. With its advanced design, it is both strong and long-lasting. As a result, it provides safe, dependable, and efficient electrical protection.
Thanks to Amp-Trap 2000® technology, AJT fuses deliver a very high interrupting rating. In addition, they provide strong limitation of fault current, which greatly reduces the risk of equipment damage. Therefore, in the event of a short circuit, they respond extremely quickly. As a result, they significantly strengthen the protection of your installations.
With their compact and robust design, these fuses fit easily into many electrical environments. Moreover, their simple format helps installation and reduces intervention time. Then, the SmartSpot® indicator provides a direct visual confirmation when a fuse has opened.
Thus, maintenance becomes easier. And above all, it becomes safer and therefore more efficient. In addition, it requires less effort. Finally, it also helps technicians work faster
🔧 Technical Specifications – AJT25 Mersen | Class J Fuse – Time-Delay 600VAC / 400VDC 25A
| Specification | Value |
|---|---|
| Rated voltage | 600 VAC / 400 VDC |
| Rated current | 25 A |
| Fuse class | Class J |
| Action type | Time-delay |
| Interrupting rating (I.R.) | 200 kA at 600 VAC / 100 kA at 400 VDC |
| Technology | Amp-Trap 2000® |
| Blown-fuse indicator | Integrated SmartSpot® |
| Dimensions | Standard Class J (compact format) |
🛠️ Main Applications
- Distribution panels and control circuits
- Motor control centers (MCC)
- Industrial automation and control systems
- HVAC equipment (heating, ventilation, air conditioning)
- Industrial machines, OEM systems, and electrical infrastructures
📄 Certifications and Standards
- UL Listed according to UL 248-8 – File UL E2137
- CSA C22.2 No. 248.8 – File CSA LR 29862
- Compliant with CE and RoHS standards
🎯 Why Choose the Mersen AJT25 – Class J Fuse?
With their compact and robust design, these fuses fit easily into many electrical environments. Moreover, their simple format makes installation easier and reduces intervention time. In addition, the SmartSpot® indicator provides a direct visual confirmation when the fuse has opened.
Key Advantages :
- Compact Class J format, ideal for optimizing space in electrical enclosures
- Time-delay action, allowing inrush currents without nuisance tripping
- High interrupting rating (200 kA at 600 VAC / 100 kA at 400 VDC) for maximum protection
- Excellent current limitation, reducing equipment damage during faults
- Integrated SmartSpot® indicator for quick visual fuse status verification
- Mersen reliability, from a globally trusted manufacturer in electrical protection
- Easy and safe installation, compatible with Mersen Class J Generation 2 fuse holders
📦 Recommended Accessories – AJT25 Mersen | Class J Fuse – Time-Delay 600VAC / 400VDC 25A
AJT25 fuses are designed to work with Mersen Class J Generation 2 fuse holders, such as the FB60J30B3 and FB60J30B1 models. Thus, you obtain a complete, safe, and high-performance solution. Moreover, this combination is ideal for your 600 V industrial electrical applications, as it ensures stable, reliable, and easy-to-integrate protection.
Recommended Fuse Holders for AJT25 Mersen

RECOMMENDED FUSEHOLDERS CLASS J FUSE
💬 Need help choosing your Mersen AJT25 fuse?
If you cannot find the right Mersen reference or accessory for your application, our team is always here to assist you. In fact, we guide you step by step to help you identify the Class J fuse that best fits your industrial electrical installation. This way, you make a choice that is safe, fast, and truly simple.
Moreover, we also offer compatible fuse holders, essential protection accessories, and complementary solutions to ensure safe, durable, and standards-compliant operation. This helps you save time, reduce errors, and maintain the continuity of your processes.
📩 Contact us now via our CONTACT US page.
We provide personalized, solution-oriented support to meet your industrial needs in the most efficient way.
⚠️ Minimize Downtime and Secure Your Electrical Protection
Each unprotected fault, or even any incorrect tripping, can lead to costly shutdowns. Moreover, over time, these interruptions can cause significant productivity losses. Thus, they also result in major financial impacts, sometimes even very substantial ones.
To avoid these risks, it is strongly recommended to obtain your Mersen AJT25 – Class J – 25 A – time-delay fuse as soon as possible.
With this robust fuse, equipped with Amp-Trap 2000® technology and the SmartSpot® visual indicator, you strengthen the safety of your installations and ensure the continuity of your industrial operations, even in the most demanding environments.
⚡ Benefit from Efficient Logistics and Reliable Technical Support
Moreover, our responsive customer service and optimized logistics chain allow you to quickly receive effective support that is perfectly suited to your needs..
- fast delivery,
- reliable technical assistance,
- industrial emergency handling,
- complete professional follow-up.
This combination ensures high-quality support, helping you anticipate issues, reduce the risk of failures, and maintain optimal electrical protection for your 600 VAC / 400 VDC circuits.
🚀 Don’t wait any longer: order your Mersen AJT25 – Class J 25A fuse today
Choose the AJT25 fuse – 25 A – 600 VAC / 400 VDC – SmartSpot® – Amp-Trap 2000®, manufactured by Mersen/Ferraz Shawmut. This provides you with:
- reliable and long-lasting protection,
- a compact Class J format,
- a fuse compliant with international standards (UL, CSA, CE, RoHS),
- performance suited to demanding industrial environments,
- and enhanced safety for your critical equipment.
By choosing the Mersen AJT25 fuse, you improve the continuity of your installations. Moreover, you reduce the risk of downtime. Thus, you strengthen the overall reliability of your electrical network.
Available in different amperages : AJT10 Mersen – AJT fuse – class J – Delayed action 600VAC 500VDC 10A SmartSpot® Amp-Trap 2000® capsule
CA Product : PFTJ25
Manufacturer : Mersen/Ferraz Shawmut
SKU : AJT25
EAN / UPC code : 782001962425
Technical Data: Click here!
Variable speed drives
Motor protection
Contactors and Overload relays
Soft Starter
Fuse type J (1a to 60a)
Fuse type J (61a to 600a)
Push button
Pilot light
Selector switch
Cables – network
Ethernet Modules – Switches
Limit switches – Process
