R. STAHL LS Leitungsschutzschalter
Model: 8530/1-MCB-STA103-B25-000-3 | Article No.: 272165
Product Overview
The R. STAHL 8530/1-MCB-STA103-B25-000-3 is a miniature circuit breaker (MCB) from the 8530 series, designed for system technology applications. These MCBs offer good current limitation for short circuits and high switching capacity of 10, 15, or 25 kA. They provide low stress on lines and high selectivity with upstream fuses. The modules are designed for modularity and are available in 1- to 4-pole versions for nominal currents from 0.5–63 A. The maximum installation capacity is 4.5 module units (TE).
Key features include:
- Disconnector function according to EN 60947-2
- Energy limitation class 3
- Easy installation and expansion with modular design
- Simple mounting by snapping onto a top-hat rail in Ex e enclosures
- Fixed thermal and magnetic trip units
- Ergonomically shaped operating lever for secure switching
- Protection against reclosing during maintenance using padlocks (accessory)
Technical Data
Explosion Protection
| Parameter | Value |
|---|---|
| Explosive Atmosphere (Zones) | 1, 2 |
| Explosive Atmosphere (Zones) - Note | Usable in Zone 21 / 22 with protection by enclosure Ex tb / tc |
| IECEx Certificate Gas | IECEx FMG 19.0029U |
| IECEx Gas Explosion Protection | Ex db eb IIC Gb |
| ATEX Certificate Gas | FM19ATEX0191U |
| ATEX Gas Explosion Protection | II 2 G Ex db eb IIC Gb |
| Certifications | ATEX (FM), Brazil (ULB), IECEx (FM), People's Republic of China (CQST) |
| Declarations of Conformity | Declaration of Conformity (ATEX), People's Republic of China (CCC) |
Electrical Data
| Parameter | Value |
|---|---|
| Rated Operational Voltage AC | 230/400 V |
| Rated Operational Current | 25 A |
| Frequency | 50/60 Hz |
| Rated Short-Circuit Breaking Capacity | 10 kA |
| Electrical Endurance | 2 x 10⁴ |
| Mechanical Endurance | 2 x 10⁴ |
| 1st Auxiliary Function | None |
| Rated Voltage 1st Auxiliary Function AC | - |
| Max. Rated Current 1st Auxiliary Function | - |
| 2nd Auxiliary Function | None |
| Max. Voltage 2nd Auxiliary Function DC | - |
| Trip Characteristic | B |
| Number of Poles | 3-pole |
Environmental Conditions
| Parameter | Value |
|---|---|
| Ambient Temperature | -40 °C ... 70 °C (-40 °F ... 158 °F) |
| Ambient Temperature - Note | Deviating ambient temperatures are available upon request based on current certificates. |
Mechanical Data
| Parameter | Value |
|---|---|
| Protection Type (IP) (IEC 60529) | IP2X |
| Housing Material | Thermoplastic |
| Conductor Cross-Section Min. | 1.5 mm² |
| Conductor Cross-Section Max. | 25 mm² |
| Conductor Cross-Section AWG Min. | 16 AWG |
| Conductor Cross-Section AWG Max. | 4 AWG |
| Conductor Cross-Section 2 Min. | 1.5 mm² |
| Conductor Cross-Section 2 Max. | 10 mm² |
| Conductor Cross-Section 2 AWG Min. | 16 AWG |
| Conductor Cross-Section 2 AWG Max. | 8 AWG |
| Tightening Torque Min. | 2 N·m |
| Tightening Torque Max. | 3 N·m |
| Conductor Cross-Section Note | 2-conductor connection (upper and lower chamber simultaneously): max. 16 / 10 mm² for upper and lower chambers. A cross-section difference between the upper and lower chambers is permissible. Refer to the operating manual for allowed conductor cross-section combinations. |
| Width | 83 mm (3.27 in) |
| Length | 165 mm (6.5 in) |
| Installation Depth | 138.3 mm (5.44 in) |
| Weight | 1.4 kg (3.087 lb) |
Mounting / Installation
| Parameter | Value |
|---|---|
| Tightening Torque | 2–3 N·m |
| Tightening Torque lbf·in | 17.7 ... 26.6 lbf·in |
| Tightening Torque Auxiliary Contact | 0.4–0.6 N·m |
| Tightening Torque Auxiliary Contact lbf·in | 3.5 ... 5.3 lbf·in |
Technical Drawings
Trip Characteristic B:
Diagram showing the trip time in seconds versus multiples of the rated current (I/In) for a 3-pole unit without auxiliary contact. The curve indicates the limit characteristic from a cold state.
Dimensional Drawings (all dimensions in mm [in]):
Diagrams illustrating the dimensions of the device, including width, height, and depth, with various mounting and connection points clearly marked.
Accessories
| Accessory | Description | Article No. |
|---|---|---|
| Lockout/Tagout Device (4-way) | A lockout/tagout device for individually locking the component, usable with up to 4 cylinder locks. | 227232 |
| Mounting Set | A mounting set for attaching the component to the mounting plate without a top-hat rail. | 276618 |
| Cylinder Lock | For locking (shackle Ø 3) | 107115 |
Note: Technical data, dimensions, weights, constructions, and availability are subject to change. Illustrations are non-binding.
