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Siemens 5SY4216-8 2-Pole Miniature Circuit Breaker — 16A, D-Curve

Siemens 5SY4216-8 2-pole miniature circuit breaker.

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ManufacturerSiemens

Part number5SY4216-8

Poles 2

Rated Voltage 400V AC

Breaking Capacity 10kA

Tripping Curve D

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Veteran-owned

CAGE: 9NK75

2-pole protection 10kA short-circuit rating D-curve tripping characteristic 400V operational voltage High inrush current capability

Product description

The Siemens 5SY4216-8 is a 2-pole miniature circuit breaker with a 400V rated voltage and 10kA breaking capacity. It features a D-curve tripping characteristic, designed for high inrush currents, and is rated for 16 Amperes. The unit measures 70 mm in width.

This circuit breaker is ideal for protecting electrical equipment that experiences significant inrush currents upon startup, such as large motors, transformers, and welding equipment. The D-curve allows for inrush currents up to 10 to 20 times the rated current without tripping.

Stanlo Automation, a veteran-owned surplus parts distributor, provides the Siemens 5SY4216-8. We offer reliable and cost-effective solutions for your industrial automation needs.

Technical specifications

Poles	2
Rated Voltage	400V AC
Breaking Capacity	10kA
Tripping Curve	D
Current Rating	16A
Width	70 mm

Common applications

Motor protection

Transformer protection

Industrial machinery

Welding equipment

High inductive loads

Compatible systems

Standard DIN rail mounting systems

Also known as

Siemens 5SY4216-8 MCB Siemens 16A D-curve breaker 5SY4 Series 16A D-curve

Replaces / compatible with

Compatible with Siemens 5SY series circuit breakers and accessories.

Technical note

Expert tip

When protecting motors, ensure the D-curve's inrush capability is adequately matched to the motor's starting characteristics.

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Frequently asked questions

Why is the D-curve of the Siemens 5SY4216-8 important for motor protection?

The D-curve on the Siemens 5SY4216-8 is essential for motor protection because motors draw a high inrush current when they start. The D-curve allows for these temporary high currents (10-20 times rated current) without tripping, preventing nuisance shutdowns.