Components for system solutions
MCB Miniature circuit breaker
Model: 8530/1-MCB-STA103-B25-000-3
Art. No.: 272165
Product Overview
The R. STAHL 8530 series miniature circuit breakers are overcurrent devices designed for system solutions. They offer good current limiting for short circuits and a high switching capacity of 10, 15, or 25 kA, resulting in low load on cables and high selectivity for upstream fuses. These components feature a modular design and are available in 1- to 4-pole versions for rated currents of 0.5-63 A. The maximum installation capacity is 4.5 subunits.
Key Features:
- Isolation function in accordance with EN60947-2
- Energy limitation class 3
- Modular design for simple replacement or expansion
- 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) provide protection against being switched on again during maintenance
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)
Technical Data
Electrical Data
| Rated operational voltage AC | 230/400 V |
| Rated operational current | 25 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 | B |
| No. of poles | 3-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. 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 | 1.4 kg |
| Weight | 3.087 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
Tripping Characteristic B:
A graph illustrates the tripping time in seconds and minutes against the multiple of the rated current. The curve shows tripping times for AC and DC, with a note indicating 'Tripping curve from cold state'.
Dimensional Drawings:
Diagrams show the overall dimensions of the circuit breaker in millimeters and inches. Key dimensions include width (83 mm / 3.27 in), length (165 mm / 6.50 in), and mounting depth (138.3 mm / 5.44 in). Different views are provided, including front, side, and top/bottom perspectives, indicating connection terminals and mounting points.
Accessories
4-way locking device
A lock-out/tag-out hasp for individually locking the component using up to four cylinder locks.
Art. No.: 227232
Cylinder lock
For closing (bracket Ø 3)
Art. No.: 107115
Fastening set
A fastening set for fastening the component on the mounting plate without a DIN rail.
Art. No.: 276618
R. STAHL reserves the right to make alterations to the technical data, dimensions, weights, designs and products available without notice. The illustrations cannot be considered binding.
