R. STAHL Miniature Circuit Breaker

Model: 8530/1-MCB-STA101-B10-500-2

Art. No.: 293977

Product Overview

The R. STAHL 8530 series miniature circuit breakers (MCBs) are overcurrent devices designed for robust system solutions. They offer excellent current limiting for short circuits and a high switching capacity of 10, 15, or 25 kA, resulting in reduced stress on cables and enhanced selectivity for upstream fuses. These components feature a modular design, available in 1- to 4-pole configurations, 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 and expansion of existing systems due to modular design
Easy installation with snap-on mounting onto the mounting rail in Ex e enclosures
Non-adjustable thermal and magnetic releases
Ergonomically shaped operating lever for safe switching operation
Provision for padlocks (accessories) to prevent 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

Parameter	Value
Rated operational voltage AC	230 V
Rated operational current	10 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	B
No. of poles	1-pole

Ambient Conditions

Ambient temperature: -40 °C ... 70 °C
Ambient temperature (Fahrenheit): -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: 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

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 B:

A diagram shows tripping time in minutes and seconds versus multiples of rated current for AC and DC, illustrating the tripping curve from a cold state.

Dimensional Drawings (All Dimensions in mm [inches]):

Diagrams show the front view, side view, and top view of the circuit breaker with key dimensions labeled.

1-pole, auxiliary contact 1 change-over contact + fault signal contact 1 change-over contact

A diagram illustrates the configuration of the auxiliary contacts.

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)

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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