R. STAHL Miniature Circuit Breaker

Model: 8530/1-MCB-STA101-C20-500-2

Art. No.: 293999

Key Features

Isolation function in accordance with EN60947-2
Energy limitation class 3
Modular design for simple replacement or expansion
Easy installation on mounting rails in Ex e enclosures
Non-adjustable thermal and magnetic releases
Ergonomically shaped operating lever for safe switching
Padlockable design (accessories) for maintenance safety

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). They reduce load on cables and provide high 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.

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	20 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	C
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.

Dimensions

Width: 65 mm (2.56 in)
Length: 165 mm (6.5 in)
Mounting depth: 138.3 mm (5.44 in)

Weight

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

(Diagrams are described textually below)

Tripping Characteristic Curve: A graph showing tripping time in seconds and minutes against multiples of rated current. The curve is labeled 'C' for tripping characteristic. It illustrates tripping times for AC and DC currents in a cold state.

Dimensional Drawings:

Main Unit: Shows a front view, side view, and top view of the miniature circuit breaker. Dimensions are provided in mm and inches. Key dimensions include width (65 mm / 2.56 in), height (165 mm / 6.5 in), and mounting depth (138.3 mm / 5.44 in).
Side View Detail: A close-up of the side of the unit, highlighting mounting features and connections.

Accessories

4-way locking device

Description: A lock-out/tag-out hasp for individually locking the component using up to four cylinder locks.
Art. No.: 227232

Cylinder lock

Description: For closing (bracket Ø 3).
Art. No.: 107115

Fastening set

Description: A fastening set for securing the component on the mounting plate without a DIN rail.
Art. No.: 276618

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