400 Volt Neozed Fuse-Links to IEC 60269-3 – Type LNZ

400V Neozed Fuse-Links to IEC 60269-3 – Type LNZ Neozed Fuse | D0 Fuse Link | D01 Fuse | D02 Fuse | D03 Fuse

Product Introduction

The Lawson Type LNZ is a precision range of Neozed Fuse links designed to protect low-voltage power circuits with high short-circuit levels in residential, commercial, and light industrial electrical installations. As the fuse-link component of the D0 Neozed screw-cap fuse system, each Type LNZ Neozed Fuse is installed in combination with the Lawson Type LNZ Neozed Fuse Holder range — the fuse-link being held securely in position by the screw cap, which is screwed into the fuse base.

Available in both 400V a.c. and 440V a.c. variants across three body sizes — LNZ11 (11mm diameter, D01 equivalent), LNZ15 (15mm diameter, D02 equivalent), and LNZ22 (22mm diameter, D03 equivalent) — the Type LNZ Neozed Fuse covers current ratings from 2A to 80A. This compact, modern D0 fuse format is fully compliant with IEC 60269-3 and is the correct certified Neozed Fuse solution for all LNZ fuse holder installations.

In addition to the standard general purpose range, motor circuit protection and semiconductor protection variants of the Lawson Type LNZ Neozed Fuse are also available — making the Type LNZ one of the most complete D0 fuse-link ranges available from a UK manufacturer.

Key Features

• Neozed Fuse (D0-type) — compact screw-in bottle fuse-link for 400V low-voltage power circuit protection
• High short-circuit protection — designed for circuits with high prospective short-circuit current levels
• Three body sizes: LNZ11 (11mm dia., D01), LNZ15 (15mm dia., D02), LNZ22 (22mm dia., D03)
• Current ratings: 2A to 80A — covering the full standard D0 Neozed current range
• Rated 400V a.c. and 440V a.c. — LNZ11 and LNZ15 available in both voltage ratings; LNZ22 (80A) in 400V only
• Compact dimensions — 36mm length (LNZ11 & LNZ15), 43mm length (LNZ22)
• Compliant with IEC 60269-3 — the international standard for fuses in household and similar low-voltage applications
• Motor circuit protection (gM) variants available
• Semiconductor protection variants available
• Used in combination with Lawson Type LNZ Neozed Fuse Holders (D01, D02, D03 bases)
• Anti-overrating protection enforced by gauge pieces in the Neozed fuse holder base — not interchangeable between sizes

Body Size Guide

LNZ11 — D01 Neozed Fuse (11mm diameter, 36mm length) The LNZ11 is the smallest body in the Type LNZ Neozed Fuse range, covering current ratings from 2A to 16A. Available in both 400V and 440V a.c. variants, the LNZ11 is used in the D01 Neozed fuse holder base (E14 thread) for low-current sub-circuit and control circuit protection. The compact 11mm body makes it particularly suited to space-efficient panel assemblies.

LNZ15 — D02 Neozed Fuse (15mm diameter, 36mm length) The LNZ15 is the most widely used body in the Type LNZ range, covering current ratings from 20A to 63A — the standard current range for most residential and commercial sub-circuit protection applications. Available in both 400V and 440V a.c. variants, the LNZ15 is used in the D02 Neozed fuse holder base (E18 thread) and covers the majority of general purpose Neozed fuse applications.

LNZ22 — D03 Neozed Fuse (22mm diameter, 43mm length) The LNZ22 is the largest body in the Type LNZ Neozed Fuse range, rated at 80A and available in 400V a.c. only. It is used in the D03 Neozed fuse holder base (M30x2 thread) for higher-current sub-circuit, distribution, and motor circuit applications within the D0 Neozed system.

Applications

The Lawson Type LNZ Neozed Fuse range is specified in:

• Low-voltage distribution boards — sub-circuit fusing in residential, commercial, and light industrial distribution equipment with high short-circuit levels
• Consumer unit and metring equipment — D0 fuse protection in domestic and light commercial service installations
• Commercial building services — general purpose sub-circuit fusing in modern commercial distribution boards
• Industrial control panel sub-circuits — lower-current (D01 and D02) sub-circuit protection in space-constrained industrial panels
• Motor circuit applications — using motor circuit protection (gM) variants for direct-on-line and star-delta motor starter fusing within the Neozed system
• Semiconductor equipment protection — using semiconductor protection variants for sensitive electronic equipment
• European and international projects — the D0 Neozed system is widely used across Continental Europe and internationally
• Maintenance and replacement — like-for-like replacement of existing Neozed fuse-links in installed D0 fuse bases

Why Choose Lawson Type LNZ Neozed Fuse?

The Lawson Type LNZ Neozed Fuse range is specifically designed for the protection of low-voltage power circuits operating at high short-circuit levels — a demanding requirement that places particular importance on consistent, certified breaking performance. With 400V and 440V a.c. variants, three body sizes covering 2A to 80A, and additional motor circuit and semiconductor protection variants, the Type LNZ provides a complete D0 Neozed Fuse solution across the full range of standard Neozed fuse-link applications.

Used in direct combination with the Lawson Type LNZ Neozed Fuse Holder range, the Type LNZ Neozed Fuse is part of a fully integrated, certified fuse and holder system — ensuring dimensional compatibility, correct contact engagement, and reliable arc interruption performance within every D0 fuse base installation.

All Lawson Type LNZ products are manufactured under an ISO 9001 accredited quality management system with test facilities independently accredited to ISO/IEC 17025, and comply with IEC 60269-3 — the international standard for fuse-links for use by unskilled persons in household and similar low-voltage applications.

Q1. What is a Neozed Fuse?

A Neozed Fuse is a D0-type compact screw-in fuse-link used in the Neozed (D0) fuse system for the protection of low-voltage power circuits. D0-type Neozed fuses were introduced in 1967 and use the same screw-cap concept as the Diazed system but have a smaller, cylindrical body, available in three sizes with ratings from 2A up to 100A. Wikipedia The Lawson Type LNZ Neozed Fuse is compliant with IEC 60269-3 and is available in 400V and 440V a.c. variants from 2A to 80A across three D0 body sizes — LNZ11 (D01), LNZ15 (D02), and LNZ22 (D03).

Q2. What are the three Neozed Fuse body sizes?

The three Lawson Type LNZ Neozed Fuse body sizes are: LNZ11 (11mm diameter x 36mm length, D01 equivalent, 2A–16A), LNZ15 (15mm diameter x 36mm length, D02 equivalent, 20A–63A), and LNZ22 (22mm diameter x 43mm length, D03 equivalent, 80A). Each body size corresponds to a specific Neozed fuse holder base size (D01, D02, or D03) and the sizes are not interchangeable — the fuse-link body size must match the fuse base installed.

Q3. What voltage ratings are available for the Lawson Type LNZ Neozed Fuse?

The LNZ11 and LNZ15 Neozed Fuse sizes are available in both 400V a.c. (LNZ-400 suffix) and 440V a.c. (LNZ-440 suffix) variants — covering both standard European network voltages. The LNZ22 (80A) is available in 400V a.c. only. The 400V a.c. variants are the standard choice for UK and most European 400/415V three-phase and single-phase supply systems.

Q4. What does a Neozed Fuse protect against?

A Neozed Fuse protects low-voltage power circuits against both overload currents and short-circuit faults — the gG utilisation category providing full-range protection for cables, conductors, and connected equipment. The Type LNZ is specifically designed for circuits with high short-circuit levels, where its certified breaking capacity ensures safe fault interruption even under the most demanding fault conditions in low-voltage distribution networks.

Q5. How is a Neozed Fuse installed and replaced?

A Neozed Fuse is installed by placing the fuse-link into the screw cap carrier of the Neozed fuse holder, then screwing the cap into the fixed fuse base until a secure contact is made. Fuse replacement requires simply unscrewing the cap by hand — no tools are needed — removing the blown fuse, inserting a replacement of the same type and current rating, and screwing the cap back in. The gauge piece in the fuse base physically prevents a higher-rated replacement from being installed accidentally.

Q6. What is the difference between the LNZ11, LNZ15, and LNZ22 Neozed Fuse sizes?

The three sizes differ in body diameter, length, and current rating range. The LNZ11 (11mm dia., 36mm) covers 2A–16A and fits the D01 fuse holder base. The LNZ15 (15mm dia., 36mm) covers 20A–63A and fits the D02 fuse holder base — this is the most widely used D0 Neozed size for general sub-circuit protection. The LNZ22 (22mm dia., 43mm) is rated at 80A and fits the D03 fuse holder base for higher-current applications. Because each size has a specific body diameter, they cannot be fitted into the wrong base size.

Q7. Are motor circuit protection variants of the Neozed Fuse available?

Yes. In addition to the standard gG general purpose Neozed Fuse range, motor circuit protection (gM) variants are available for direct-on-line and star-delta motor starter applications within the Neozed D0 fuse system. gM Neozed fuse-links tolerate the short-duration starting inrush current of motors without nuisance operation while still providing full overcurrent protection. Contact the Lawson Fuses sales team for details of available gM ratings and sizes.

Q8. Are semiconductor protection variants of the Neozed Fuse available?

Yes. Semiconductor protection variants of the Type LNZ Neozed Fuse are also available for applications where rapid-acting protection of sensitive electronic or semiconductor devices is required within the D0 Neozed fuse system. Contact the Lawson Fuses sales team for details of available semiconductor protection ratings and sizes.

Q9. What is the difference between a Neozed Fuse and a Diazed Fuse?

Both are screw-cap bottle-type fuse-links with inherent anti-overrating gauge piece protection, but they differ in several key respects. The Neozed Fuse (D0 type) has a smaller, more compact body (D01, D02, D03 sizes), is rated at 400V a.c., and covers 2A–100A. The Diazed Fuse (D-type) has a larger body (DII, DIII, DIV, DV sizes), is rated at up to 500V a.c., and covers up to 200A. The two systems use different body sizes and are not interchangeable — always cheque which fuse system is installed before ordering a replacement.

Q10. What Neozed Fuse Holder is compatible with the Lawson Type LNZ Neozed Fuse?

The Type LNZ Neozed Fuse is designed for use with the Lawson Type LNZ Neozed Fuse Holder range — specifically the D01 base for LNZ11 fuse-links (2A–16A), the D02 base for LNZ15 fuse-links (20A–63A), and the D03 base for LNZ22 fuse-links (80A). The gauge piece in the fuse base must also be set to the correct current rating for the circuit. Neozed fuse-links from other manufacturers conforming to the same D0 dimensional and electrical standard are also compatible with the Lawson Type LNZ fuse holder bases.