R. STAHL Miniature Circuit Breaker
Model: 8530/1-MCB-STA103N-C20-000-4
Art. No.: 293857
Product Description
The R. STAHL 8530 series miniature circuit breakers (MCBs) are overcurrent devices designed for system solutions. They offer excellent current limiting for short circuits and a high switching capacity of 10, 15, or 25 kA, resulting in reduced load on cables and high selectivity for upstream fuses. These components feature a modular design, available in 1- to 4-pole versions, with rated currents from 0.5-63 A. The maximum installation capacity is 4.5 subunits.
Key features include:
- Isolation function in accordance with EN60947-2
- Energy limitation class 3
- Modular design for simple replacement or expansion
- Easy installation, snapping onto mounting rails in Ex e enclosures
- Non-adjustable thermal and magnetic releases
- Ergonomically shaped operating lever for safe switching
- Optional padlock accessory for protection against accidental switching during maintenance
Technical Data
Explosion Protection
| Application range (zones) | 1, 2 |
| Application range (Zone) note | For use in Zone 21/22 when protected by 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 2 G Ex db eb IIC Gb |
| Certificates | ATEX (FM), Brazil (ULB), China (CQST), IECEx (FM) |
| Declaration of conformity | Certificate of conformity (ATEX) |
Electrical Data
| Rated operational voltage AC | 230/400 V |
| Rated operational current | 20 A |
| Frequency | 50/60 Hz |
| Rated switching capacity | 10 kA |
| Electrical service life | 2 x 10⁴ |
| Mechanical service life | 2 x 10⁴ |
| 1st auxiliary function | without |
| 1st auxiliary function for AC rated voltage | - |
| 1st auxiliary function for rated current max. | - |
| 2nd auxiliary function | without |
| 2nd auxiliary function voltage max. DC | - |
| Tripping characteristic | C |
| No. of poles | 3-pole + N |
Ambient Conditions
| Ambient temperature | -40 °C ... 70 °C |
| Ambient temperature | -40 °F ... 158 °F |
| Ambient temperature note | Deviating ambient temperatures based on current certificates available on request |
Mechanical Data
| Degree of protection (IP) (IEC 60529) | IP2X |
| Enclosure material | Thermoplast |
| Connection cross section min. | 1.5 mm² |
| Connection cross-section max. | 25 mm² |
| Connection cross-section AWG min. | 16 AWG |
| Connection cross-section AWG max. | 4 AWG |
| Connection cross-section 2 min. | 1.5 mm² |
| Connection cross-section 2 max. | 10 mm² |
| Connection cross-section 2 AWG min. | 16 AWG |
| Connection cross-section 2 AWG max. | 8 AWG |
| Min. tightening torque | 2 N·m |
| Max. tightening torque | 3 N·m |
| Connection cross-section note | 2-conductor connection (upper and lower chamber at the same time): upper and lower chamber max. 16/10 mm² (A maximum difference of one cross section may be clamped between the upper and lower chamber.) The permitted combinations of connection cross-sections can be found in the operating instructions. |
| Width | 110 mm |
| Width, inches | 4.33 in |
| Length | 165 mm |
| Length in inches | 6.5 in |
| Mounting depth | 138.3 mm |
| Mounting depth in inches | 5.44 in |
| Weight | 1.8 kg |
| Weight | 3.969 lb |
Mounting / Installation
| Tightening torque | 2–3 N·m |
| Tightening torque lbf in | 17.7 to 26.6 lbf-in |
| Tightening torque auxiliary contact | 0.4–0.6 N·m |
| Tightening torque auxiliary contact lbf in | 3.5 to 5.3 lbf in |
Tripping Characteristic
The document includes a graph illustrating the tripping characteristic 'C' for AC and DC currents, showing tripping time in seconds and minutes against multiples of rated current.
Tripping characteristic C
The graph displays the relationship between the multiple of rated current and the tripping time. For example, at 5 times the rated current, the tripping time is approximately 0.1 seconds for a cold state.
Dimensional Drawings
Detailed dimensional drawings are provided in millimeters and inches, showing the overall dimensions of the circuit breaker and its mounting configuration. The main unit dimensions are approximately 110 mm (width) x 165 mm (length) x 138.3 mm (mounting depth).
3-pole + N, without auxiliary contact
Accessories
| Accessory | Description | Art. No. |
|---|---|---|
|
4-way locking device [lock-symbol] |
A lock-out/tag-out hasp for individually locking the component using up to four cylinder locks. | 227232 |
|
Cylinder lock [lock-symbol] |
for closing (bracket Ø 3) | 107115 |
|
Fastening set [fastener-symbol] |
A fastening set for fastening the component on the mounting plate without a DIN rail | 276618 |
