Tag Fuses
Fuses are safety devices used to protect electrical circuits from overcurrent or short circuits. Tag fuses are specifically designed for general industrial applications including power distribution, motor protection, and cable protection. Tag fuses can be easily identified by metal tags that protrude from the ends of the fuse body in either central or offset directions.
At RS we offer an extensive range of high-quality tag fuses, including BS88 Standard Fuses, and a comprehensive range of tag fuses from leading brands including Siemens, Mersen and Eaton and RS PRO. Many of these products are part of our Better World range, helping you make more sustainable choices without compromising on performance. With Next Day Delivery available, you can get the components you need fast.
Types of Tag Fuse
- Bolted Tag - Bolted tag fuses are cylindrical type of fuse fitted with brackets at either end to bolt it onto a fuse holder. Bolted tag fuses mainly vary by their size and current rating, and these factors can differ quite widely. They can also differ by the fuse speed, voltage rating and tag orientation.
- Centred Tag - Centred tag fuses are square or rectangular with a central blade or tag. The tag allows easy installation into an open fuse base. Centre tag fuses come in a range of fuse speeds, voltage rating and amperages.
- Offset Tag - Offset tag fuses are a cylindrical fuse that features offset mounting tags at each end of the fuse. The tags can be solid or slotted. Offset fuses come in a range of fuse speeds, voltage ratings and amperages.
- Slotted Tag - Slotted tag fuses are generally circular in shape but can be square bodied. They feature slotted tags that can be straight or offset. Slotted tag fuses come in a range of fuse speeds, voltage ratings and amperages.
Fuse utilisation categories
Tag fuses are classified using standardized two-letter utilization codes that define their performance and application characteristics.
The first letter (lowercase) indicates the breaking capacity:
- g - Full-range breaking capacity
- a – Partial-range breaking capacity
The second letter (uppercase) designates the application type, such as:
- G – General-purpose fuse for cables and wiring protection
- M – Motor protection
- R – Semiconductor protection
Common types include gG which is general-purpose with full-range protection, aM which is a motor circuit fuse offering short-circuit protection only, and gR which is a full-range fuse designed for semiconductor protection. To learn more about fuses, take a look at our Fuses Guide.
