R. STAHL 8530/1-MCB-STA103-C50-500-4 Line Protection Circuit Breaker
Article Number: 293905
Product Overview
The R. STAHL 8530 series line protection circuit breakers, specifically the 8530/1-MCB-STA103-C50-500-4, offer robust current limitation for short circuits and high switching capacities of 10, 15, or 25 kA. These components are designed for minimal load on lines and high selectivity to upstream fuses. They feature a modular design, available in 1 to 4 pole versions with nominal currents from 0.5–63 A. The maximum installation capacity is 4.5 partial units (UP).
Key features include:
- Disconnection function according to EN 60947-2
- Energy limitation class 3
- Easy replacement and system extension due to modular design
- Simple snap-on mounting on DIN rails in Ex e enclosures
- Fixed magneto-thermal releases
- Ergonomic lever for safe operation
- Padlock protection (accessories) to prevent re-operation during maintenance
Technical Characteristics
Explosion Protection
| Characteristic | Specification |
|---|---|
| Application Area (Zones) | 1, 2 |
| Application Area (Zones) Note | Usable in Zone 21 / 22 with protection via Ex tb / tc enclosure |
| IECEx Gas Certificate | IECEx FMG 19.0029U |
| IECEx Gas Explosion Protection | Ex db eb IIC Gb |
| ATEX Gas Certificate | FM19ATEX0191U |
| ATEX Gas Explosion Protection | II 2G Ex db eb IIC Gb |
| Certificates | ATEX (FM), Brazil (ULB), China (CQST), IECEx (FM) |
| Certificate of Conformity | Certificate of Conformity (ATEX) |
Electrical Characteristics
| Characteristic | Specification |
|---|---|
| Rated Operational Voltage AC | 230/400 V |
| Rated Service Current | 50 A |
| Frequency | 50/60 Hz |
| Rated Switching Capacity | 10 kA |
| Electrical Service Life | 104 |
| Mechanical Service Life | 2 x 105 |
| 1st Auxiliary Function | Auxiliary contact 1 changeover + error signal contact 1 changeover |
| Voltage 1st Auxiliary Function AC | 230 V |
| Max. Current 1st Auxiliary Function | 2 A |
| 2nd Auxiliary Function | None |
| Max. Voltage 2nd Auxiliary Function DC | - |
| Tripping Characteristic | C |
| Number of Poles | 3-pole |
Mechanical Characteristics
| Characteristic | Specification |
|---|---|
| Ambient Temperature | -40 °C ... 70 °C |
| Ambient Temperature (Fahrenheit) | -40 °F ... 158 °F |
| Ambient Temperature Note | Different ambient temperatures based on current certificates, on request |
| Degree of Protection (IP) (IEC 60529) | IP2X |
| Enclosure Material | Thermoplastic |
| Connection Terminal Minimum Section | 1.5 mm² |
| Connection Terminal Maximum Section | 25 mm² |
| Connection Terminal AWG Min. | 16 AWG |
| Connection Terminal AWG Max. | 4 AWG |
| Connection Terminal 2 Minimum Section | 1.5 mm² |
| Connection Terminal 2 Maximum Section | 10 mm² |
| Connection Terminal 2 AWG Min. | 16 AWG |
| Connection Terminal 2 AWG Max. | 8 AWG |
| Connection Terminal Auxiliary Contact Min. | 0.5 mm² |
| Connection Terminal Auxiliary Contact Max. | 4 mm² |
| Connection Terminal Auxiliary Contact AWG Min. | 18 (unece.unit.AWG) |
| Connection Terminal Auxiliary Contact AWG Max. | 14 (unece.unit.AWG) |
| Tightening Torque Min. | 2 N·m |
| Tightening Torque Max. | 3 N·m |
| Connection Terminal Note | 2 conductors (upper and lower chamber simultaneously): Upper and lower chamber max. 16 / 10 mm² (Connection can be made with a maximum section difference between the upper and lower chamber.) Permitted connection combinations are listed in the operating manual. |
| Width | 110 mm (4.33 in) |
| Length | 165 mm (6.5 in) |
| Mounting Depth | 138.3 mm (5.44 in) |
| Weight | 1.8 kg (3.969 lb) |
Mounting / Installation
| Characteristic | Specification |
|---|---|
| Tightening Torque | 2-3 N·m (17.7 ... 26.6 lbf-in) |
| Tightening Torque Auxiliary Contact | 0.4-0.6 Nm (3.5 ... 5.3 lbf-in) |
Technical Drawings
Tripping Characteristic Curve
A graph illustrating the tripping characteristic curve C for AC and DC, showing time in seconds versus multiple of rated current (I/In). The curve indicates the limit from a cold state.
Overall Dimensions (Enclosure Plan)
Diagrams showing the overall dimensions of the circuit breaker in millimeters and inches. The main unit is 110 mm (4.33 in) wide and 165 mm (6.50 in) long, with a mounting depth of 138.3 mm (5.44 in). It is noted as 4 division units.
Accessories
Quadruple Locking Device
A locking/unlocking system that allows individual component locking using up to 4 cylinder locks.
| Description | Article Number |
|---|---|
| Quadruple locking/unlocking system for individual component locking with up to 4 cylinder locks. | 227232 |
Fixing Kit
A fixing kit for mounting the component onto a mounting plate without a DIN rail.
| Description | Article Number |
|---|---|
| Fixing kit for mounting the component onto a mounting plate without DIN rail. | 276618 |
Cylinder Lock
For locking (stirrup Ø 3).
| Description | Article Number |
|---|---|
| For locking (stirrup Ø 3). | 107115 |
