Siemens
Siemens Miniature Circuit Breaker 5SX21-B6
Siemens 5SX21-B6 Miniature Circuit Breaker.
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12-month warranty
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Same-day dispatch
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Worldwide delivery
US, EU, Asia, Middle East
Veteran-owned
CAGE: 9NK75
Overcurrent protection
Short circuit protection
Overload protection
Compact design
Siemens quality
Product description
The Siemens 5SX21-B6 is a miniature circuit breaker. Specific technical details such as current rating, trip curve, and number of poles will depend on the exact datasheet from Siemens. These devices are designed for overcurrent protection in electrical installations.
Miniature circuit breakers like the 5SX21-B6 are commonly used in residential, commercial, and industrial applications to protect circuits from short circuits and overloads. They are essential safety devices for preventing electrical fires and equipment damage.
Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 5SX21-B6. Secure your electrical safety components from a trusted source.
Technical specifications
| Type | Miniature Circuit Breaker |
| Part Number | 5SX21-B6 |
| Manufacturer | Siemens |
| Current Rating | To be confirmed |
| Trip Curve | To be confirmed |
| Poles | To be confirmed |
Common applications
Residential electrical panels
Commercial building circuits
Industrial control panels
Machine protection
Power distribution
Compatible systems
Standard DIN rail mounting
Various Siemens electrical distribution boards
General electrical circuits
Also known as
Siemens MCB 5SX21-B6
5SX21 Miniature Breaker
Siemens Safety Switch
Replaces / compatible with
This is a Siemens 5SX21 series miniature circuit breaker. It can replace other breakers within the same series or similar specifications depending on application requirements.
Technical note
Expert tip
Always verify the exact specifications (e.g., Amperage, Trip Class) from the Siemens datasheet for the 5SX21-B6 to ensure it meets your specific circuit protection requirements.What happens next?
1
Email confirmation
Immediate receipt acknowledgment sent to you
2
Account manager assigned
Confirms your part's spec and condition
3
Your quote delivered
Tailored to your specific requirements
Frequently asked questions
What is the current rating and trip curve for the Siemens 5SX21-B6?
Specific technical details like the current rating and trip curve for the Siemens 5SX21-B6 are not universally defined by the part number alone and require consulting the official Siemens datasheet for this exact model.