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MERSEN

Mersen is a global manufacturer of electrical power and advanced materials, with a history dating back to 1892. The company's electrical segment produces a broad range of circuit protection components, including fuses, fuse blocks, surge protective devices, and low-voltage disconnect switches. Mersen fuses are used in industrial, commercial, and renewable energy applications to protect equipment from overcurrent and short-circuit conditions. The product families cover multiple fuse classes and speeds: time-delay and fast-acting cylindrical fuses, midget fuses, UL Class CC fuse blocks, very-fast-acting square-body fuses, and medium-voltage R-rated fuses. These components are specified by voltage and current ratings, breaking capacity, and physical dimensions to meet the requirements of control panels, power distribution, motor starters, and instrumentation circuits. 3G Electric supplies Mersen fuses and fuse accessories as part of its industrial equipment catalog. The line includes over 1,400 SKUs, spanning time-delay fuses such as the ATQ series, fast-acting fuses like the ATM, GGM, and GSB series, and fuse blocks such as the USCC1 and USCC2. Also available are very-fast-acting bolt-on square fuses from the A30QS series and medium-voltage R-rated fuses from the DAR0 series. These products are used in overcurrent protection for control panels, power supplies, instrumentation, motor starters, and power distribution systems. Technical buyers can source Mersen components with global logistics support from 3G Electric.

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About MERSEN

Mersen is a global manufacturer of electrical power and advanced materials, with a history dating back to 1892. The company's electrical segment produces a broad range of circuit protection components, including fuses, fuse blocks, surge protective devices, and low-voltage disconnect switches. Mersen fuses are used in industrial, commercial, and renewable energy applications to protect equipment from overcurrent and short-circuit conditions. The product families cover multiple fuse classes and speeds: time-delay and fast-acting cylindrical fuses, midget fuses, UL Class CC fuse blocks, very-fast-acting square-body fuses, and medium-voltage R-rated fuses. These components are specified by voltage and current ratings, breaking capacity, and physical dimensions to meet the requirements of control panels, power distribution, motor starters, and instrumentation circuits. 3G Electric supplies Mersen fuses and fuse accessories as part of its industrial equipment catalog. The line includes over 1,400 SKUs, spanning time-delay fuses such as the ATQ series, fast-acting fuses like the ATM, GGM, and GSB series, and fuse blocks such as the USCC1 and USCC2. Also available are very-fast-acting bolt-on square fuses from the A30QS series and medium-voltage R-rated fuses from the DAR0 series. These products are used in overcurrent protection for control panels, power supplies, instrumentation, motor starters, and power distribution systems. Technical buyers can source Mersen components with global logistics support from 3G Electric.

Common Applications

  • Industrial control panels — Mersen USCC1 and USCC2 UL Class CC fuse blocks for DIN rail mounting and finger-safe branch circuit protection.
  • Motor starters — Mersen ATQ time-delay fuses and DAR0 R-rated fuses for motor overload and short-circuit protection.
  • Power supplies and instrumentation — Mersen GGM and GSB fast-acting cylindrical fuses for overcurrent protection in compact electronic circuits.
  • DC systems — Mersen A30QS very-fast-acting square fuses rated 300 V DC for semiconductor and DC equipment protection.
  • Medium-voltage distribution — Mersen DAR0 R-rated fuses rated 5.08 kV AC for general-purpose overcurrent protection with visual indication.

Frequently asked questions

Common questions about MERSEN from 3G Electric.

What is the difference between Mersen ATQ and ATM series fuses?

The Mersen ATQ series is a time-delay midget fuse, while the ATM series is a fast-acting midget fuse. Both are rated 600 V AC (ATM also rated 600 V DC) and have dimensions of 13/32 in x 1 1/2 in. Time-delay fuses like the ATQ tolerate temporary overloads, making them suitable for motor circuits, while fast-acting ATM fuses respond quickly to overcurrents and are used in control panels and instrumentation where rapid protection is needed.

What are the voltage and current ratings for Mersen USCC1 and USCC2 fuse blocks?

The Mersen USCC1 is a 1-pole UL Class CC fuse block rated 600 V AC, and the USCC2 is a 2-pole version with the same voltage rating. Both feature DIN rail mounting and pressure plate termination. They are finger-safe and accept Class CC fuses, which are typically used for branch circuit protection in industrial control panels. The USCC2 provides two poles in a single block, saving panel space compared to two separate 1-pole blocks.

What is the A30QS series used for?

The Mersen A30QS series consists of very-fast-acting bolt-on square fuses rated 300 V AC/DC. These fuses are available with an indicating function that provides visual blown-fuse detection. They are used for overcurrent protection in applications requiring high-speed interruption, such as semiconductor devices, DC systems, and industrial equipment where fast clearing is necessary to prevent damage. The bolt-on mounting ensures secure electrical connection in high-vibration environments.

What does R-rated mean for Mersen DAR0 fuses?

R-rated fuses, such as the Mersen DAR0 series, are medium-voltage fuses designed for motor starter protection. They are rated 5.08 kV AC and 700 A in the DAR0 example. R-rated fuses have a specific time-current characteristic that coordinates with motor overload relays and contactors, providing short-circuit protection while allowing motor starting currents. They are general-purpose fuses with visual indication for blown fuse status, used in medium-voltage motor starters and related equipment.

Are Mersen GGM and GSB series fuses RoHS compliant?

Yes, the Mersen GGM and GSB series fast-acting cylindrical fuses are RoHS compliant. These fuses have a glass body and are rated 250 V AC with a 5.1 mm x 20.1 mm form factor. The GGM series includes a 400 mA rating (part number GGM4/10), and the GSB series includes a 630 mA rating (part number GSB630/1000). They are used for overcurrent protection in control panels, power supplies, and instrumentation circuits where space is limited and fast response is required.

Does 3G Electric supply MERSEN products?

Yes — 3G Electric (S) Pte. Ltd. supplies MERSEN products. We stock the MERSEN catalog and supply genuine factory-original products with full manufacturer warranty and technical support.