RS PRO 20A British Standard Fuse A1 550V ac, 44.5 mm

View all Tag Fuses
Bulk discount available

Subtotal (1 pack of 5 units)*

£20.54

(exc. VAT)

£24.65

(inc. VAT)

Add to Basket
Select or type quantity
In Stock
  • 126 unit(s) ready to ship
  • Plus 115 unit(s) shipping from 09 July 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Pack(s)
Per Pack
Per unit*
1 - 4£20.54£4.108
5 - 24£18.14£3.628
25 - 49£17.05£3.41
50 - 99£15.90£3.18
100 +£13.02£2.604

*price indicative

RS Stock No.:
521-2523
Brand:
RS PRO
Find similar products by selecting one or more attributes.
Select all

Brand

RS PRO

Current Rating

20A

Product Type

British Standard Fuse

Fuse Size

A1

Voltage

550V ac

Standards/Approvals

No

Fixing Centres

44.5 mm

Application Category

gG

Tag Width

11.2mm

High Rupture Capacity

Yes

Overall Length

55.2mm

Length

55.2mm

Width

42.5mm

Series

STD

RoHS Status: Exempt

COO (Country of Origin):
IN

Eaton STD Series British Standard Fuse, 20A Current Rating, 550V AC Voltage Rating - NITD20RS


This Fuse is engineered for general industrial applications, ensuring excellent protection for power distribution and motor systems. With a current rating of 20A and a voltage rating of 550V AC, this fuse is compatible with the gG and gM utilisation categories. The fuse measures 13.7mm in diameter and 55.2mm in length, featuring a slotted tag type for versatile installation.

Features & Benefits


• High rupture capacity ensures effective protection against overloads

• Good peak let-through current limitation aids in system reliability

• Selective coordination enhances performance between minor and major fuses

• Compliance with BS 88 and IEC 60269 standards guarantees safety and quality

• Low power loss values contribute to energy efficiency

• Designed for use in RoHS compliant applications ensuring environmental safety

Applications


• Used for cable protection within electrical distribution systems

• Effective in motor protection for various industrial machinery

• Suitable for installations requiring high rupture capacity and durability

• Ideal for environments adhering to BS 88 and IEC 60269 standards

What is the breaking capacity of this fuse?


The breaking capacity is rated at 80kA, providing significant fault protection in industrial applications.

How does the selective coordination ratio benefit electrical systems?


The selective coordination ratio of 1:1:6 allows for targeted disconnection of only the faulty circuit, enhancing overall system reliability and reducing downtime.

Can this fuse be used in applications with varying voltage levels?


Yes, it is rated for both 415V AC and 550V AC, making it versatile for a range of operating conditions.

What is the significance of the gG fuse standard in this model?


The gG fuse standard indicates that this fuse is designed to provide protection for general applications, handling both overload and short-circuit protection effectively.

Related links