Components for system solutions
MCB Miniature circuit breaker
Model: 8530/1-MCB-STA102-C2-500-3
Art. No.: 272131
Product Overview
R. STAHL 8530 series miniature circuit breakers are overcurrent devices designed for robust protection. They offer excellent current limiting for short circuits and high switching capacity (10, 15, or 25 kA), resulting in reduced stress on cables and improved selectivity with upstream fuses. These components feature a modular design, available in 1- to 4-pole versions, with rated currents ranging 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
- Simple replacement or expansion of systems due to modular design
- Easy installation: snaps onto the mounting rail in Ex e enclosures
- Non-adjustable thermal and magnetic releases
- Ergonomically shaped operating lever for safe switching
- Padlocks (accessories) for protection against unauthorized 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), China (CCC) |
Electrical Data
| Rated operational voltage AC | 230/400 V |
| Rated operational current | 2 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 | Auxiliary contact 1 change-over contact + fault signal contact 1 change-over contact |
| 1st auxiliary function for AC rated voltage | 230 V |
| 1st auxiliary function for rated current max. | 2 A |
| 2nd auxiliary function | without |
| 2nd auxiliary function voltage max. DC | - |
| Tripping characteristic | C |
| No. of poles | 2-pole |
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. aux. cont. con. cr.-sect. | 0.5 mm² |
| Max. aux. cont. conn. cr.-sec. | 4 mm² |
| Min. aux. co. con. cr.-se. AWG | 18 (unece.unit.AWG) |
| Connection cross-section of auxiliary contact AWG max. | 14 (unece.unit.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 | 83 mm |
| Width, inches | 3.27 in |
| Length | 165 mm |
| Length in inches | 6.5 in |
| Mounting depth | 138.3 mm |
| Mounting depth in inches | 5.44 in |
| Weight | 1.3 kg |
| Weight | 2.867 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 |
Technical Drawings
Subject to Alterations
Tripping Characteristic C
A diagram shows tripping curves for a circuit breaker with tripping characteristic C. The x-axis represents the multiple of rated current, and the y-axis represents tripping time in seconds and minutes. Curves are shown for AC and DC applications, indicating the time it takes for the breaker to trip under various overcurrent conditions.
Dimensional Drawings
Diagrams illustrate the dimensions of the circuit breaker in millimeters and inches. Key dimensions include width (83 mm / 3.27 in), length (165 mm / 6.5 in), and mounting depth (138.3 mm / 5.44 in). The drawings also show the terminal layout and the 2-pole configuration.
Auxiliary Contacts
A diagram shows the configuration of the auxiliary contacts: 1 change-over contact plus 1 fault signal contact, also as a change-over contact.
Accessories
| Item | Description | Art. No. |
4-way locking device [lock emoji] |
A lock-out/tag-out hasp for individually locking the component using up to four cylinder locks. | 227232 |
Cylinder lock [lock emoji] |
For closing (bracket Ø 3) | 107115 |
Fastening set [wrench emoji] |
A fastening set for fastening the component on the mounting plate without a DIN rail. | 276618 |
