Components for system solutions

MCB Miniature circuit breaker

Model: 8530/1-MCB-STA102-C40-500-3 | Art. No.: 272140

Product Overview

The R. STAHL 8530 series miniature circuit breakers 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 load on cables and improved selectivity for upstream fuses. These components feature a modular design, available in 1- to 4-pole versions, with rated currents 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) prevent accidental switching on 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	40 A
Frequency	50/60 Hz
Rated switching capacity	10 kA
Electrical service life	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	C
No. of poles	2-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. 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.

Dimensions

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	1.3 kg
Weight	2.867 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 C:

A graphical representation shows the tripping time in minutes and seconds against multiples of the rated current for both AC and DC. The curves indicate the tripping behavior from a cold state for tripping characteristic C.

Dimensional Drawings:

Diagrams illustrate the dimensions of the circuit breaker in millimeters and inches, including width, length, and mounting depth. The diagrams also show the connection terminals and the overall structure of the 2-pole unit.

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 notice. Illustrations are not binding.

Contact Information:

R. STAHL Schaltgeräte GmbH | Am Bahnhof 30 | 74638 WALDENBURG

Tel: +49 7942 943 1700 | +49 7942 943 1777 | Email: sales.de@r-stahl.com | Website: r-stahl.com

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