Home › Manufacturers › Siemens › 5SX21-B16

Siemens

Siemens 5SX21-B16 Miniature Circuit Breaker

Siemens 5SX21-B16 miniature circuit breaker, 1-pole, 16A, B-curve.

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

In Stock — Ready to Ship

ManufacturerSiemens

Part number5SX21-B16

Type Miniature Circuit Breaker (MCB)

Poles 1

Rated Current 16 A

Tripping Characteristic Type B

Get a price for 5SX21-B16

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

16A Rated Current Type B Trip Curve Single Pole 230V AC Operation Overcurrent Protection Compact Design

Product description

The Siemens 5SX21-B16 is a single-pole miniature circuit breaker (MCB) designed for reliable protection of electrical circuits against overcurrents. It features a Type B tripping characteristic, which provides protection against short circuits with a rapid response, and also offers overload protection.

With a rated current of 16 Amps and a rated voltage of 230 V AC, this circuit breaker is suitable for various residential, commercial, and light industrial applications. Its compact design and standard mounting provisions allow for easy installation in distribution boards and control panels.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 5SX21-B16. We provide cost-effective solutions for your electrical protection needs, ensuring operational continuity. Choose Stanlo for reliable and affordable circuit protection components.

Technical specifications

Type	Miniature Circuit Breaker (MCB)
Poles	1
Rated Current	16 A
Tripping Characteristic	Type B
Rated Voltage	230 V AC
Breaking Capacity	Standard

Common applications

Residential Electrical Panels

Commercial Buildings

Light Industrial Circuits

Motor Branch Circuits

Lighting Circuits

Control Panels

Compatible systems

Standard Distribution Boards Electrical Control Systems

Also known as

Siemens 16A MCB 5SX21 B16 Siemens Type B Breaker 1-pole 16A Circuit Breaker

Replaces / compatible with

This is a standard Siemens miniature circuit breaker. It can replace other 1-pole, 16A, Type B MCBs from Siemens or compatible manufacturers.

Technical note

Expert tip

Ensure the ambient temperature for installation is within the specified operating range for the MCB to maintain its rated performance and lifespan. Typically, this is around 40°C for full rating.

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 5SX21-B16 circuit breaker?

The Siemens 5SX21-B16 features a Type B tripping characteristic. This means it will trip between 3 to 5 times its rated current (16A), making it suitable for protecting circuits with low inrush current loads and providing rapid response to short circuits.