Components for system solutions
MCB Miniature circuit breaker
8530/1-MCB-STA103-B32-000-3 Art. No. 272166
The R. STAHL 8530 series miniature circuit breakers are overcurrent devices designed for system solutions. They offer good current limiting for short circuits and high switching capacity (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 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 on and off
- Padlocks (Accessories) for protection against unintended switching on during maintenance
Product Image:
[Image of R. STAHL 8530 series miniature circuit breakers]
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 | 32 A |
| Frequency | 50/60 Hz |
| Rated switching capacity | 10 kA |
| Electrical service life | 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:
[Diagram showing tripping characteristic B curves for AC and DC]
Dimensional Drawings (All Dimensions in mm [inches]):
[Diagram showing front, side, and top views of the circuit breaker with dimensions]
Accessories
4-way locking device
A lock-out/tag-out hasp for individually locking the component using up to four cylinder locks.
| Description | Art. No. |
| 4-way locking device | 227232 |
Cylinder lock
| Description | Art. No. |
| for closing (bracket Ø 3) | 107115 |
Fastening set
| Description | Art. No. |
| A fastening set for fastening the component on the mounting plate without a DIN rail | 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.
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