RS PRO 40A British Standard Fuse, A3, 550V ac, 73.5mm
- RS Stock No.:
- 521-2630
- Brand:
- RS PRO
Bulk discount available
Subtotal (1 pack of 5 units)*
£45.54
(exc. VAT)
£54.65
(inc. VAT)
FREE delivery for orders over £50.00
In Stock
- 135 unit(s) ready to ship
- Plus 100 unit(s) shipping from 30 October 2025
- Plus 135 unit(s) shipping from 23 January 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit | Per Pack* |
---|---|---|
5 - 20 | £9.108 | £45.54 |
25 - 120 | £8.006 | £40.03 |
125 - 245 | £6.694 | £33.47 |
250 - 495 | £6.03 | £30.15 |
500 + | £5.774 | £28.87 |
*price indicative
- RS Stock No.:
- 521-2630
- Brand:
- RS PRO
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
---|---|---|
Brand | RS PRO | |
Current Rating | 40A | |
Fuse Size | A3 | |
Voltage Rating | 550V ac | |
Fuse Standard | BS 88, IEC 269 | |
Fixing Centres | 73.5mm | |
Application Category | gG | |
Tag Width | 12.7mm | |
High Rupture Capacity | Yes | |
Overall Length | 87mm | |
Tag Type | Bolted | |
Body Diameter | 21mm | |
Tag Orientation | Offset | |
Body Length | 54mm | |
Body Height | 22.3mm | |
Offset Distance | 73mm | |
Series | BAO | |
Fuse Dimensions | 21 x 54mm | |
Select all | ||
---|---|---|
Brand RS PRO | ||
Current Rating 40A | ||
Fuse Size A3 | ||
Voltage Rating 550V ac | ||
Fuse Standard BS 88, IEC 269 | ||
Fixing Centres 73.5mm | ||
Application Category gG | ||
Tag Width 12.7mm | ||
High Rupture Capacity Yes | ||
Overall Length 87mm | ||
Tag Type Bolted | ||
Body Diameter 21mm | ||
Tag Orientation Offset | ||
Body Length 54mm | ||
Body Height 22.3mm | ||
Offset Distance 73mm | ||
Series BAO | ||
Fuse Dimensions 21 x 54mm | ||
RoHS Status: Exempt
- COO (Country of Origin):
- IN
RS PRO British Standard Fuse, 40A Current Rating, 550V AC Voltage
This British Standard Fuse is designed for reliable electrical protection in various applications. With a current rating of 40A and a voltage rating of 550V AC, it adheres to BS 88 and IEC 269 standards. Compactly sized at 21mm in diameter and 54mm in length, this high rupture capacity fuse provides essential safeguards for electrical circuits.
Features & Benefits
• Offers a current rating of 40A for robust performance
• High rupture capacity ensures safety during overloads
• Meets BS 88 and IEC 269 standards for reliability
• Bolted tag design provides secure connections
• A3 fuse size allows compatibility with various enclosures
• gG fuse rating suitable for general applications
• High rupture capacity ensures safety during overloads
• Meets BS 88 and IEC 269 standards for reliability
• Bolted tag design provides secure connections
• A3 fuse size allows compatibility with various enclosures
• gG fuse rating suitable for general applications
Applications
• Used in industrial electrical installations for circuit protection
• Applicable in automation systems where overload safety is crucial
• Ideal for installations using 550V AC supply for reliable performance
• Utilised in machinery and equipment requiring a 40A fuse rating
• Applicable in automation systems where overload safety is crucial
• Ideal for installations using 550V AC supply for reliable performance
• Utilised in machinery and equipment requiring a 40A fuse rating
What specific advantages does the bolted tag design provide in electrical installations?
The bolted tag design ensures a secure and stable connection, reducing the risk of disconnection during high-load situations and providing reliable circuit protection in demanding environments.
How does this fuse perform in terms of pre-arcing time at 415V?
The pre-arcing time is rated at 1400ms at 415V, which allows for improved safety by enabling prompt response to overload conditions, thus minimising potential damage.
What is the significance of the gG rating for this fuse, and where is it typically applicable?
The gG rating indicates that it is suitable for applications requiring high inrush current tolerance, making it ideal for protecting motors, transformers, and similar equipment where initial current surges may occur.
Related links
- Eaton 40A British Standard Fuse 550V ac, 73.5mm
- RS PRO 50A British Standard Fuse 550V ac, 73.5mm
- RS PRO 80A British Standard Fuse 550V ac, 73.5mm
- RS PRO 100A British Standard Fuse 550V ac, 73.5mm
- RS PRO 63A British Standard Fuse 550V ac, 73.5mm
- Eaton 63A British Standard Fuse 550V ac, 73.5mm
- Eaton 50A British Standard Fuse 550V ac, 73.5mm
- RS PRO 40A British Standard Fuse 415V ac