The BTMF42V355 fuse-link is engineered to IEC BS88 standards for dependable circuit protection in demanding industrial and commercial settings. Rated at 355A, it safely interrupts fault currents at up to 415VAC or 240VDC, making it ideal for a wide range of power distribution applications.
£79.28
The Mersen BTMF42V355 is a heavy-duty industrial bolted-tag fuse link designed to provide dependable protection for high-current, low-voltage electrical systems. Manufactured by Mersen, it helps protect cables, busbars, switchgear and connected equipment against potentially damaging overcurrent and short-circuit conditions.
With a rated current of 355 A and an operating voltage of up to 415 V AC, the BTMF42V355 is suited to demanding power-distribution and motor-control installations. Its robust bolted-tag construction provides a secure electrical and mechanical connection within compatible fuse holders, fuse-switch disconnectors and industrial switchgear assemblies.
The BTMF42V355 offers effective current limitation during severe electrical faults, helping to reduce peak fault current, let-through energy and stress on downstream equipment. It is a practical choice for electrical engineers, panel builders and maintenance teams requiring reliable circuit protection in industrial environments.
The Mersen BTMF42V355 operates by interrupting excessive current before it can cause serious thermal or mechanical damage to conductors, switchgear and connected machinery. During a severe short circuit, its current-limiting action helps restrict the peak current and electrical energy passed through the protected circuit.
Correct fuse selection and coordination with cables, contactors, overload devices and other protective equipment can improve installation safety and system reliability. The BTMF42V355 should always be installed in compatible equipment with suitable current, voltage and fault-level ratings.
| Item number | E226324 |
|---|---|
| Catalogue No | BTMF42V355 |
| Description | British Standard fuse-link IEC BS88 gG Type B4 415VAC 240VDC 355A BTMF Central Bolted Tag |
| EAN/UPC Code | 3605340268010 |
| Rated voltage AC IEC | 415 V |
| Rated voltage DC IEC | 240 V |
| Ampere Rating | 355 A |
| RoHS Compliant | Yes |
| AC or DC | AC/DC |
| Speed/Characteristic | gG |
| Fuse Size | B4 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 1106000 A²s |
| Melting I2t | 395000 A²s |
| AC Max I.R./Breaking Capacity | I1: 80 kA |
| Max. Rated Breaking Capacity DC | 40 kA |
| Connection/Terminal Material | Tin-Plated Copper |
| Connection/Terminal Type | Central Bolted Tag |
| Product Diameter | 59.1 mm |
| Product Length | 138 mm |
| Sell Pack Quantity | 1 EA |
| Sell Pack Weight | 0.612 kg |
| Sell Pack Width | 53 mm |
| Sell Pack Length | 139 mm |
| Sell Pack Height | 52 mm |
| Product group | Low Voltage IEC Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.612 kg |
| Power Dissipation at Rated Current Value | 32 W |
| HS Code | 85361090 |
| Country of Manufacture | India |
The BTMF42V355 is used to protect high-current industrial circuits, cables, busbars, switchgear and connected electrical equipment against potentially damaging fault currents.
The Mersen BTMF42V355 has a rated current of 355 A.
The fuse link is rated for operation at up to 415 V AC.
It uses bolted-tag connections and should be installed in compatible fuse equipment rated for its current, voltage, physical format and prospective fault level.
No. The BTMF42V355 is a single-use fuse link and must be replaced with a correctly rated equivalent after it has operated.
Mersen industrial fuse links are trusted by electrical engineers, panel builders and maintenance professionals for dependable fault interruption, effective current limitation and reliable protection in demanding power and motor-control applications.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...