steve
Got hold of Sime for a Carrier card for…
Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
3 months ago
5SB321
Siemens 5SB321 available at EU Automation. Get in touch today for a quick price.
Based on over 4900 reviews
Full 12-month warranty
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2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
All orders are subject to product availability. See our T&Cs.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 5SB321 is a quick-acting DIAZED fuse link designed for electrical circuit protection in industrial and commercial installations. Rated at 50 A and 500 V AC/DC, this DIII-size fuse features a fast-response tripping characteristic and white colour coding for straightforward identification. It provides a rated switching capacity of 50 kA on AC circuits and 8 kA on DC circuits, with an operating temperature range of -5°C to 40°C. Manufactured in accordance with DIN EN 60269-1 requirements, the 5SB321 offers dependable overcurrent protection for compatible DIAZED fuse systems.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | 5SB321 |
| Product Type | DIAZED fuse link |
| Fuse Size | DIII |
| Rated Current | 50 A |
| Rated AC Voltage | 500 V AC |
| Rated DC Voltage | 500 V DC |
| Tripping Characteristic | Quick-acting (F) |
| AC Breaking Capacity | 50 kA |
| DC Breaking Capacity | 8 kA |
| Colour Coding | White |
| Minimum Ambient Temperature | -5 °C |
| Maximum Ambient Temperature | 40 °C |
| Applicable Standard | DIN EN 60269-1 |
| Product Description | Siemens 5SB321 quick-acting DIAZED fuse link designed in the DIII format for electrical circuit protection, with a 50 A rated current and operation at up to 500 V AC or DC. |
What type of electrical component is this?
This is a DIAZED fuse link designed to interrupt excessive current in low-voltage electrical circuits.
What is the rated current?
The Siemens 5SB321 has a rated AC current of 50 A.
What voltage rating does this fuse link have?
It is rated for operation at up to 500 V AC and 500 V DC.
What is the fuse link's operating characteristic?
It has a quick-acting, class F characteristic, allowing it to respond rapidly when the current exceeds the permitted level.
Which DIAZED size does it use?
This fuse link is manufactured in the DIII size in accordance with DIN EN 60269-1.
What does the white colour coding indicate?
The white colour coding identifies the fuse link's 50 A current rating within the DIAZED system.
What is the rated AC switching capacity?
The rated AC switching capacity is 50 kA under the specified IEC test conditions.
What is the rated DC switching capacity?
The rated DC switching capacity is 8 kA under the specified IEC test conditions.
What ambient temperature range is specified?
The specified ambient operating range is from -5 °C to 40 °C.
Can this fuse link be used in both AC and DC circuits?
Yes. It is rated for both AC and DC applications, although its switching capacity differs between the two circuit types.
What should be checked when selecting a compatible fuse holder?
Confirm that the holder accepts a DIII DIAZED fuse link and is suitable for the required 50 A current rating, voltage, circuit type and switching capacity.
Where is this type of fuse link commonly used?
DIAZED fuse links are commonly installed in low-voltage distribution boards, industrial control panels and electrical protection assemblies that use compatible DIII fittings.
- Protecting industrial electrical circuits against short circuits and excessive current
- Providing fast-acting fuse protection for machinery and control panels
- Safeguarding AC circuits rated up to 500 V
- Protecting DC circuits rated up to 500 V
- Installing in compatible DIII DIAZED fuse bases and holders
- Isolating faulty circuits in power distribution assemblies
- Protecting electrical equipment with loads rated up to 50 A
- Supporting circuit protection in manufacturing and process automation systems
- Replacing matching 50 A quick-response DIAZED fuse links
- Providing branch-circuit protection in commercial and industrial installations
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
steve
Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
4 months ago
Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
5 months ago
Paulo Pereira
Excellent service and communication…
Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
5 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
5 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
6 months ago
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