Components for system solutions

MCB Miniature circuit breaker

Model: 8530/1-MCB-STA102-B6-500-3

Art. No.: 272123

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

Product Overview

R. STAHL 8530 series miniature circuit breakers are overcurrent devices offering excellent current limiting for short circuits and high switching capacity (10, 15, or 25 kA). This design minimizes load on cables and enhances selectivity for upstream fuses. The components feature a modular design, available in 1- to 4-pole versions for rated currents from 0.5-63 A. The maximum installation capacity is 4.5 subunits.

Technical Data

Explosion Protection

Parameter	Value
Application range (zones)	1, 2
Application range (Zone) note	For use in Zone 2/21/22 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

Parameter	Value
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	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	2-pole

Ambient Conditions

Parameter	Value
Ambient temperature	-40 °C ... 70 °C
Ambient temperature (°F)	-40 °F ... 158 °F
Ambient temperature note	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. 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

Parameter	Value (mm)	Value (inches)
Width	83	3.27
Length	165	6.5
Mounting depth	138.3	5.44

Weight

Parameter	Value (kg)	Value (lb)
Weight	1.3	2.867

Mounting / Installation

Parameter	Value (N·m)	Value (lbf·in)
Tightening torque	2-3	17.7 to 26.6
Tightening torque auxiliary contact	0.4-0.6	3.5 to 5.3

Technical Drawings

Tripping characteristic B curve for AC and DC, showing tripping time against multiple of rated current.

Dimensional drawings showing overall dimensions in mm and inches, including width, length, and mounting depth. Also shows connection terminal details.

Accessories

Accessory	Description	Art. No.
4-way locking device	A lock-out/tag-out hasp for individually locking the component using up to four cylinder locks.	227232
Cylinder lock	for closing (bracket Ø 3)	107115
Fastening set	A fastening set for fastening the component on the mounting plate without a DIN rail.	276618

Note: 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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