400/500/690 Volt Fuse-Holders to IEC 60269-2, IEC 60269-3 – Type MS

400/500/690V Modular Cylindrical Fuse Holders to IEC 60269-2 & IEC 60269-3 – Type MS Modular Fuse Holder | DIN Rail Fuse Holder | Cylindrical Fuse Holder | 10×38 Fuse Holder | 14×52 Fuse Holder | 22×58 Fuse Holder | 32A AC Fuse Holder | 63A AC Fuse Holder | 100A AC Fuse Holder

Product Introduction

The Lawson Type MS is a versatile and highly capable range of Modular Fuse Holders designed to accommodate industrial cylindrical fuse-links in four popular frame sizes — making it the definitive DIN Rail Fuse Holder solution for industrial control panels, distribution boards, and power distribution equipment rated up to 690V a.c.

Available as a 10×38 Fuse Holder (MSC 101, 32A AC Fuse Holder), 14×52 Fuse Holder (MSC 141, 50A), and 22×58 Fuse Holder (MSC 221, 125A / 100A AC Fuse Holder), as well as the compact MSC 81 (20A, 8.5×31.5mm), the Type MS Cylindrical Fuse Holder range covers current ratings from 20A up to 125A across voltage ratings of 400V, 500V, and 690V a.c. — providing a single, modular Modular Fuse Holder platform that spans the full range of industrial cylindrical fuse protection requirements.

All contacts in the Type MS DIN Rail Fuse Holder are silver plated for superior conductivity and long service life. Operating handles on each unit allow non load-break disconnecting and safe electrical isolation for fuse-link replacement without tools. Conversion kits allow 2, 3, or 4-pole assemblies to be constructed from single-pole units — making the Type MS the most flexible Modular Fuse Holder available for industrial panel building applications. All variants comply with IEC 60269-2 and IEC 60269-3.

Key Features

• Modular Fuse Holder — for industrial cylindrical fuse-links to IEC 60269-2 and IEC 60269-3
• DIN Rail Fuse Holder — designed for 35mm DIN rail mounting in industrial control panels and distribution equipment
• Cylindrical Fuse Holder — four frame sizes covering 8.5×31.5mm, 10x38mm, 14x51mm, and 22x58mm fuse-link formats
• 10×38 Fuse Holder (MSC 101) — 32A AC Fuse Holder, the most widely used industrial cylindrical fuse size
• 14×52 Fuse Holder (MSC 141) — 50A rated Cylindrical Fuse Holder for mid-range current applications
• 22×58 Fuse Holder (MSC 221) — 125A rated, suitable as a 100A AC Fuse Holder and 63A AC Fuse Holder application
• Voltage ratings up to 690V a.c. — covering 400V, 500V, and 690V industrial three-phase supply systems
• Silver plated contacts — low contact resistance, superior conductivity, and long service life
• Operating handles — for non load-break disconnecting and tool-free fuse-link replacement
• Electrical isolation for safe fuse-link replacement without tools
• Integral neutral link (N) variants available — MSC 81N, MSC 101N, MSC 141N, MSC 221N
• Indicator (I) variant available for MSC 101 — MSC 101 I, for visual blown fuse detection
• Multi-pole assembly — 2, 3, or 4-pole units can be assembled using conversion kits
• Compatible with Lawson Type LFN cylindrical fuse-links (gG and gM variants) and solid/neutral links (SLLFN series)
• Compliant with IEC 60269-2 and IEC 60269-3

Frame Size Guide

MSC 81 — 8.5×31.5mm Cylindrical Fuse Holder (20A) The MSC 81 is the smallest frame in the Type MS Modular Fuse Holder range, accepting 8.5mm x 31.5mm cylindrical fuse-links rated up to 20A. Suited to low-current sub-circuit and control circuit protection in industrial panels. Available with integral neutral link (MSC 81N).

MSC 101 — 10×38 Fuse Holder (32A AC Fuse Holder) The MSC 101 is the most widely used frame in the Type MS DIN Rail Fuse Holder range, accepting the standard 10.3mm x 38mm cylindrical fuse-link — the 10×38 Fuse Holder format used across the majority of industrial control panel applications. Rated at 32A, this 32A AC Fuse Holder is available with indicator (MSC 101 I) for blown fuse detection and with integral neutral link (MSC 101 N). Compatible with LFN 10G (gG) and LFN 10M (gM) fuse-links.

MSC 141 — 14×52 Fuse Holder (50A) The MSC 141 14×52 Fuse Holder (also referenced as 14×51) accepts 14mm x 51mm cylindrical fuse-links rated up to 50A — the Cylindrical Fuse Holder of choice for mid-range current applications including motor sub-circuit, transformer primary, and feeder circuit protection. Available with integral neutral link (MSC 141 N). Compatible with LFN 14G and LFN 14M fuse-links.

MSC 221 — 22×58 Fuse Holder (125A / 100A AC Fuse Holder / 63A AC Fuse Holder) The MSC 221 22×58 Fuse Holder is the largest frame in the Type MS range, accepting 22mm x 58mm cylindrical fuse-links rated up to 125A — making it suitable as a 100A AC Fuse Holder and 63A AC Fuse Holder application across high-current distribution, main incomer, and busbar sub-circuit protection. Available with integral neutral link (MSC 221 N). Compatible with LFN 22G and LFN 22M fuse-links.

Multi-Pole Assembly

One of the most practical features of the Type MS Modular Fuse Holder range is its ability to be assembled into 2, 3, or 4-pole units using suitable conversion kits. This means a single-pole DIN Rail Fuse Holder can be combined with additional poles to create a complete three-phase or four-wire protection assembly — giving panel builders maximum flexibility to construct multi-pole cylindrical fuse protection solutions within a single, compact footprint on a standard 35mm DIN rail.

Applications

The Lawson Type MS Modular Fuse Holder, DIN Rail Fuse Holder, and Cylindrical Fuse Holder range is specified across a wide range of industrial and commercial electrical applications:

• Industrial control panels — the MSC 101 10×38 Fuse Holder is the standard fuse holder for three-phase sub-circuit protection in industrial MCCs and control panels
• Motor circuit protection — using gM (LFN 10M, LFN 14M, LFN 22M) fuse-links for motor starter circuit fusing
• Distribution boards and switchgear — multi-pole DIN Rail Fuse Holder assemblies for three-phase and four-wire distribution
• Transformer and power supply protection — primary side fusing using 14×52 and 22×58 format cylindrical fuse holders
• Building management systems and BMS panels — control circuit and sub-circuit fusing using MSC 81 and MSC 101
• Solar and renewable energy — 10×38 and 22×58 Cylindrical Fuse Holder for DC string and combiner box applications
• Marine and offshore installations — 690V rated variants for higher-voltage shipboard distribution systems
• Railway and rolling stock — control and auxiliary circuit fuse protection in traction equipment

Why Choose Lawson Type MS?

The Lawson Type MS Modular Fuse Holder range combines four frame sizes, three voltage ratings (400V, 500V, 690V), neutral link variants, indicator options, and multi-pole assembly capability into a single, coherent DIN Rail Fuse Holder platform — making it one of the most complete and flexible Cylindrical Fuse Holder systems available from a UK manufacturer.

Silver plated contacts ensure low, consistent contact resistance throughout the service life of the holder, while the operating handle mechanism provides safe, non load-break disconnection and tool-free fuse replacement — reducing both maintenance time and the risk of accidental contact with live conductors during fuse inspection.

Manufactured by Lawson Fuses under an ISO 9001 accredited quality management system with test facilities accredited to ISO/IEC 17025, and compliant with IEC 60269-2 and IEC 60269-3, the Type MS Modular Fuse Holder is the industrial DIN Rail Fuse Holder that engineers and panel builders across the UK and internationally rely on.

Q1. What is a Modular Fuse Holder?

A Modular Fuse Holder is a fuse holder designed to be mounted on a standard 35mm DIN rail within an industrial control panel or distribution board, accepting cylindrical fuse-links for overcurrent protection of industrial circuits. The Lawson Type MS is a Modular Fuse Holder range covering four cylindrical fuse-link sizes — 8.5×31.5mm, 10x38mm (10×38 Fuse Holder), 14x51mm (14×52 Fuse Holder), and 22x58mm (22×58 Fuse Holder) — in current ratings from 20A to 125A at voltages up to 690V a.c.

Q2. What is a DIN Rail Fuse Holder?

A DIN Rail Fuse Holder is a fuse holder specifically designed to clip onto and be secured to a standard 35mm DIN rail — the mounting rail used in virtually all modern industrial control panels, distribution boards, and electrical enclosures. The Lawson Type MS DIN Rail Fuse Holder provides a compact, modular mounting solution for cylindrical fuse-links, with operating handles for non load-break disconnection and safe tool-free fuse replacement.

Q3. What is a Cylindrical Fuse Holder?

A Cylindrical Fuse Holder is a fuse holder designed to accept cylindrical cartridge fuse-links — the barrel-shaped fuse-links used in industrial and commercial AC fuse protection. The Lawson Type MS Cylindrical Fuse Holder range accommodates four standard cylindrical fuse-link sizes: 8.5×31.5mm, 10.3x38mm (10×38 Fuse Holder), 14x51mm (14×52 Fuse Holder), and 22x58mm (22×58 Fuse Holder), with current ratings of 20A, 32A, 50A, and 125A respectively.

Q4. What is a 10×38 Fuse Holder and what current rating does it support?

A 10×38 Fuse Holder is a Cylindrical Fuse Holder designed to accept 10mm diameter x 38mm long cylindrical fuse-links. The Lawson MSC 101 is a 10×38 Fuse Holder rated at 32A — making it a 32A AC Fuse Holder suitable for three-phase sub-circuit protection in industrial control panels. It is available as a standard unit (MSC 101), with a blown fuse indicator (MSC 101 I), or with an integral neutral link (MSC 101 N), and accepts both gG (LFN 10G) and gM motor protection (LFN 10M) fuse-links.

Q5. What is a 14×52 Fuse Holder and what is it used for?

The 14×52 Fuse Holder (also referenced as 14×51 Fuse Holder) accepts 14mm diameter x 51mm long cylindrical fuse-links and is rated at 50A in the Lawson MSC 141. It is used for mid-range current applications including motor sub-circuit protection, transformer primary fusing, and feeder circuit protection in industrial control panels and distribution boards. Available with integral neutral link as MSC 141 N.

Q6. What is a 22×58 Fuse Holder and how does it serve as a 100A AC Fuse Holder?

The 22×58 Fuse Holder is the largest frame in the Type MS Modular Fuse Holder range, accepting 22mm diameter x 58mm long cylindrical fuse-links. The Lawson MSC 221 is rated at up to 125A, making it suitable as a 100A AC Fuse Holder and 63A AC Fuse Holder depending on the fuse-link installed. The MSC 221 is used for high-current distribution, main incomer protection, and sub-circuit fusing in larger industrial panels and switchboards.

Q7. What voltage ratings are available for the Type MS Modular Fuse Holder?

The Lawson Type MS DIN Rail Fuse Holder range is rated for use at 400V, 500V, and 690V a.c. — covering the standard industrial three-phase supply voltages used across the UK, Europe, and internationally. The 690V rating makes the Type MS particularly suitable for industrial applications where higher supply voltages are used, such as large motors, offshore installations, and high-power manufacturing equipment.

Q8. Can the Type MS Cylindrical Fuse Holder be assembled into multi-pole units?

Yes. The Type MS Modular Fuse Holder is designed for multi-pole assembly using suitable conversion kits. Single-pole units can be combined to create 2-pole, 3-pole, or 4-pole assemblies — providing complete three-phase or four-wire cylindrical fuse protection within a compact, unified DIN-rail footprint. This modularity makes the Type MS the ideal DIN Rail Fuse Holder for panel builders constructing multi-circuit protection assemblies.

Q9. What are the N and I variants in the Type MS range?

The N suffix (e.g. MSC 101 N) indicates a variant with an integral neutral link — a solid link in the neutral position that provides a neutral connection within the fuse holder assembly without a fuse-link in the neutral conductor, as required by certain wiring configurations. The I suffix (MSC 101 I) indicates a variant with a built-in indicator for visual blown fuse detection — allowing maintenance personnel to quickly identify a blown fuse within the holder without removing the fuse-link.

Q10. What fuse-links are compatible with the Lawson Type MS Modular Fuse Holder?

The Type MS Cylindrical Fuse Holder range is designed for use with Lawson Type LFN cylindrical fuse-links — including LFN 8G (8.5×31.5mm), LFN 10G / LFN 10M (10x38mm), LFN 14G / LFN 14M (14x51mm), and LFN 22G / LFN 22M (22x58mm). The G suffix denotes gG (general purpose) rated fuse-links, while the M suffix denotes gM (motor protection) rated fuse-links. Solid/neutral links (SLLFN series) are also available for all frame sizes.

Q11. How do I order the Lawson Type MS Modular Fuse Holder?

The full Lawson Type MS Modular Fuse Holder, DIN Rail Fuse Holder, and Cylindrical Fuse Holder range — including 10×38 Fuse Holder, 14×52 Fuse Holder, 22×58 Fuse Holder, 32A AC Fuse Holder, 63A AC Fuse Holder, and 100A AC Fuse Holder variants — is available through the Lawson Fuses sales team and their network of authorised sales partners and electrical wholesalers across the UK. Contact Lawson Fuses directly for trade pricing, availability, multi-pole conversion kits, and technical support for your panel building or industrial installation project.