R. STAHL Miniature Circuit Breaker

Model: 8530/1-MCB-STA102-B25-000-2

Art. No.: 293920

Product Overview

The R. STAHL 8530 series miniature circuit breakers (MCBs) 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 a 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
Padlocks (accessories) provide protection against unintended switching during maintenance

Technical Data

Explosion Protection

Parameter	Value
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

Parameter	Value
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	2-pole

Ambient Conditions

Parameter	Value
Ambient temperature	-40 °C ... 70 °C
Ambient temperature note	-40°F ... +158°F
Deviating ambient temperatures	Based on current certificates available on request

Mechanical Data

Parameter	Value
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.

Dimensions

Parameter	Value (mm)	Value (inches)
Width	65 mm	2.56 in
Length	165 mm	6.5 in
Mounting depth	138.3 mm	5.44 in
Weight	1 kg	2.205 lb

Mounting / Installation

Parameter	Value
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 B (Diagram Description)

A graph illustrates the tripping characteristic 'B' for the circuit breaker. The X-axis represents the 'Multiple of rated current', and the Y-axis represents 'Tripping time' in seconds and minutes. The graph shows the tripping curves for AC and DC, indicating the time it takes for the breaker to trip at different multiples of its rated current. The curve is shown from a cold state.

Dimensional Drawings

Diagrams show the physical dimensions of the circuit breaker. One diagram displays the front view with dimensions for width, height, and mounting points. Another shows a side view, and a third illustrates the connection terminals and overall depth. All dimensions are provided in millimeters with inch equivalents in parentheses.

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

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