Home › Manufacturers › Siemens › 5SX21C15

Siemens

Siemens 5SX21C15 1-Pole Miniature Circuit Breaker

● In Stock 12-Mo Warranty Same-Day Dispatch Ships Worldwide 🎖 Veteran-Owned

In Stock — Ready to Ship

ManufacturerSiemens

Part number5SX21C15

Poles 1

Rated Current 15A

Breaking Capacity 6kA

Voltage Rating 400V AC

Get a price for 5SX21C15

Response within 1 business hour

🛡

12-month warranty

All units tested

⚡

Same-day dispatch

Order by 2pm CST

🌐

Worldwide delivery

US, EU, Asia, Middle East

🎖

Veteran-owned

CAGE: 9NK75

1-Pole design C-curve tripping 6kA breaking capacity 400V AC rating DIN rail mountable Overcurrent protection

Product description

The Siemens 5SX21C15 is a 1-pole miniature circuit breaker (MCB) from the 5SX series, designed for reliable overcurrent protection. It features a C-curve tripping characteristic, a rated current of 15A, a breaking capacity of 6kA, and an operating voltage of 400V AC. This MCB is essential for safeguarding electrical circuits against short circuits and overloads.

This circuit breaker is commonly used in residential, commercial, and industrial applications for protecting lighting circuits, socket outlets, and small motor loads. Its robust design ensures safety and operational continuity in various environments, including control panels and distribution boards.

Stanlo Automation, a veteran-owned business, offers genuine surplus industrial parts like the Siemens 5SX21C15. We provide quality components with fast shipping and dedicated customer support to keep your operations running smoothly.

Technical specifications

Poles	1
Rated Current	15A
Breaking Capacity	6kA
Voltage Rating	400V AC
Tripping Curve	C
Series	5SX

Common applications

Residential Electrical Panels

Commercial Distribution Boards

Industrial Control Panels

Lighting Circuits

Socket Outlet Protection

Small Motor Loads

Compatible systems

Standard DIN rail mounting systems Standard electrical distribution panels

Also known as

Siemens 5SX21C15 MCB 5SX21C15 circuit breaker Siemens 1-pole breaker

Replaces / compatible with

This circuit breaker is designed to replace older or similarly specified 1-pole Siemens MCBs within the 5SX series or compatible product lines.

Technical note

Expert tip

Ensure proper termination torque is applied to the terminals to prevent overheating and ensure reliable operation.

What happens next?

Email confirmation

Immediate receipt acknowledgment sent to you

Account manager assigned

Confirms your part's spec and condition

Your quote delivered

Tailored to your specific requirements

Frequently asked questions

What is the tripping characteristic of the Siemens 5SX21C15?

The Siemens 5SX21C15 features a C-curve tripping characteristic. This means it is designed to trip between 5 to 10 times the rated current, making it suitable for circuits with moderate inductive or capacitive loads that may experience temporary current surges.