The BTMF69V400 fuse-link is engineered to BS88 gG standards, providing reliable circuit protection with a 400A rating for up to 690VAC and 460VDC. Features central bolted tag connection and ceramic body for industrial and commercial applications.
£162.67
The Mersen BTMF69V400 is a heavy-duty industrial bolted tag fuse link designed to provide reliable protection for high-current low-voltage electrical systems. Manufactured by Mersen, it helps protect cables, busbars, switchgear and connected equipment by interrupting excessive current during serious electrical fault conditions.
Engineered for demanding power distribution applications, the BTMF69V400 offers effective current-limiting performance that helps reduce the peak current and total fault energy passing through the circuit. This can minimise thermal and mechanical stress on downstream components while supporting improved installation safety and reliability.
With a rated current of 400 A and an operating voltage of up to 690 V AC, the BTMF69V400 is suitable for high-capacity switchboards, industrial distribution panels, feeder circuits and machinery supplies. Its bolted tag arrangement provides a secure electrical and mechanical connection within compatible fuse holders and fused switching equipment.
The Mersen BTMF69V400 is designed to disconnect a circuit rapidly when a dangerous electrical fault occurs. Its current-limiting action restricts the peak fault current and the amount of energy transferred to downstream equipment, helping reduce the risk of damage to conductors, busbars and switchgear.
Correct fuse selection and coordination with the associated fuse holder, switching device and downstream equipment can improve system reliability and minimise unplanned downtime. The BTMF69V400 is particularly suited to installations requiring dependable protection at currents up to 400 A and voltages up to 690 V AC.
| Item number | M1006629 |
|---|---|
| Catalogue No | BTMF69V400 |
| Description | British Standard fuse-link IEC BS88 gG Type B4 690VAC 460VDC 400A BTMF Central Bolted Tag |
| EAN/UPC Code | 3605340485141 |
| Rated voltage AC IEC | 690 V |
| Rated voltage DC IEC | 460 V |
| Ampere Rating | 400 A |
| RoHS Compliant | Yes |
| AC or DC | AC/DC |
| Speed/Characteristic | gG |
| Fuse Size | B4 |
| Mounting | Bolted |
| Clearing I2t At Rated Voltage | 2525000 A²s |
| Melting I2t | 505000 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 | 0.618 kg |
| Sell Pack Width | 70 mm |
| Sell Pack Length | 128 mm |
| Sell Pack Height | 62 mm |
| Product group | Low Voltage IEC Fuses |
| Body/Insulating Material | Ceramic |
| Product Weight | 0.618 kg |
| Power Dissipation at Rated Current Value | 38 W |
| HS Code | 85361090 |
| Country of Manufacture | India |
The BTMF69V400 is used to protect high-current industrial electrical circuits, cables, busbars, switchgear and connected equipment against damaging fault currents.
The Mersen BTMF69V400 has a rated current of 400 A.
The fuse link is designed for electrical systems operating at up to 690 V AC.
The fuse interrupts excessive current and limits the peak fault current and electrical energy passing into downstream cables, busbars, switchgear and connected equipment.
The BTMF69V400 is typically installed in a compatible industrial fuse holder, fused switch or switch-disconnector within a high-current power distribution system.
Mersen industrial fuse links are trusted by electrical engineers, panel builders and maintenance professionals for dependable fault interruption and effective current limitation in demanding power distribution installations.
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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...