R. STAHL Miniature Circuit Breaker

Model: 8530/1-MCB-STA103N-B6-000-4

Article No.: 293843

Components for System Solutions

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 improved selectivity for upstream fuses.

These components feature a modular design and are 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:

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 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	6 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
2nd auxiliary function	without
Tripping characteristic	B
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

Technical Drawings

Tripping Characteristic B:

A graph illustrates the tripping time in seconds and minutes against the multiple of rated current for tripping characteristic B, showing the performance from a cold state for AC and DC.

Dimensional Drawings:

Diagrams show the dimensions of the MCB in millimeters and inches, including width, length, and mounting depth. It also depicts a 3-pole + N configuration without an auxiliary contact.

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 securing the component on the mounting plate without a DIN rail. (Art. No. 276618)

Note: R. STAHL reserves the right to make alterations to technical data, dimensions, weights, designs, and products without prior notice. Illustrations are not binding.

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