5SY4403-8
Product ID:161807
Updated: 2026/7/4

Key Features
- 1Ensure reliable protection with a 10kA short-circuit breaking capacity.
- 2Extend service life using halogen-free and silicon-free durable materials.
- 3Handle versatile applications with 400V AC and 72V DC voltage ratings.
- 4Simplify installation in compact spaces with 90x72x76mm dimensions.
- 5Meet safety standards including UL 1077 and EN 60898 compliance.
Need a quote? Enter your quantity and get pricing fast.
Qty
Technical Specifications
Detailed engineering parameters
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Protection Class IP | IP20 | Overvoltage Category | 3 |
| Release Characteristic | D | Voltage Type | AC |
| Lifecycle | Delivery Release (PM300) | Country of Origin | Germany |
| ECCN | N | AL | N |
| Model Number | 5SY4403-8 |
Specifications may be subject to change without notice
Still deciding on 5SY4403-8?
Our engineers can confirm stock, price, and lead time for this Siemens part.
Get a no-obligation quote in 1 minute.
