R. STAHL 8530/1-MCB-STA103-B20-500-4 Line Protection Circuit Breaker

Article Number: 293887

Key Features

Disconnecting function according to EN 60947-2
Energy limitation class 3
Easy replacement or extension of your system thanks to the modular design of the circuit breakers
Simple mounting by clipping onto a DIN rail in Ex e enclosures
Fixed magneto-thermal releases
Ergonomic lever for safe activation and deactivation
Padlock protection (accessories) prevents restarting during maintenance operations

Product Overview

The R. STAHL 8530 series line protection circuit breakers offer good current limitation in case of short circuits and a high switching capacity of 10, 15, or 25 kA. This ensures minimal load on lines and high selectivity to upstream fuses. The components are modularly designed and available in 1 to 4 pole versions for nominal currents from 0.5–63 A. The maximum installation capacity is 4.5 partial units (UP).

Technical Characteristics

Explosion Protection

Feature	Specification
Application Domain (Zones)	1, 2
Application Domain (Zones) Note	Usable in Zone 21 / 22 with Ex tb / tc enclosure protection
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 2G Ex db eb IIC Gb
Certificates	ATEX (FM), Brazil (ULB), China (CQST), IECEx (FM)
Certificate of Conformity	ATEX Conformity Certificate

Electrical Characteristics

Feature	Specification
Rated Operational Voltage AC	230/400 V
Rated Service 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 changeover contact + signal contact 1 changeover contact
Voltage 1st Auxiliary Function AC	230 V
Max. Current 1st Auxiliary Function	2 A
2nd Auxiliary Function	None
Max. Voltage 2nd Auxiliary Function DC	-
Tripping Characteristic	B
Number of Poles	3-pole

Ambient Conditions

Feature	Specification
Ambient Temperature	-40 °C ... 70 °C (-40°F ... +158°F)
Ambient Temperature Note	Ambient temperatures different from current certificates, upon request

Mechanical Characteristics

Feature	Specification
Degree of Protection (IP) (IEC 60529)	IP2X
Enclosure Material	Thermoplastic
Minimum Connection Terminal Size	1.5 mm²
Maximum Connection Terminal Size	25 mm²
Minimum AWG Connection Terminal Size	16 AWG
Maximum AWG Connection Terminal Size	4 AWG
Minimum Connection Terminal Size 2	1.5 mm²
Maximum Connection Terminal Size 2	10 mm²
Minimum AWG Connection Terminal Size 2	16 AWG
Maximum AWG Connection Terminal Size 2	8 AWG
Min. Connection Terminal Size (Auxiliary)	0.5 mm²
Max. Connection Terminal Size (Auxiliary)	4 mm²
Min. AWG Connection Terminal Size (Auxiliary)	18 (unece.unit.AWG)
Max. AWG Connection Terminal Size (Auxiliary)	14 (unece.unit.AWG)
Minimum Tightening Torque	2 N·m
Maximum Tightening Torque	3 N·m
Connection Terminal Size Note	Connection of 2 conductors (upper and lower chamber simultaneously): Upper and lower chamber max. 16 / 10 mm² (Connection can be made with a maximum cross-section difference between the upper and lower chamber.) Authorized connection combination possibilities are indicated in the operating instructions.

Dimensions

Feature	Metric	Imperial
Width	110 mm	4.33 in
Length	165 mm	6.5 in
Mounting Depth	138.3 mm	5.44 in
Weight	1.8 kg	3.969 lb

Mounting / Installation

Feature	Specification
Tightening Torque	2-3 N·m (17.7 ... 26.6 lbf-in)
Tightening Torque Auxiliary Contact	0.4-0.6 N·m (3.5 ... 5.3 lbf-in)

Technical Drawings

Diagrams illustrating tripping characteristics and overall dimensions are provided. The tripping characteristic curve shows the tripping limit from a cold state for AC and DC currents. The overall dimensions plan shows the unit in mm and inches, indicating width, length, mounting depth, and various internal dimensions.

Accessories

Quadruple Locking Device

A locking/unlocking system that allows individual locking of the component using up to 4 cylinder locks.

Description	Article Number
Quadruple locking/unlocking system for individual locking of the component using up to 4 cylinder locks.	227232

Fixing Kit

A fixing kit to attach the component to the mounting plate without a DIN rail.

Description	Article Number
A fixing kit to attach the component to the mounting plate without a DIN rail.	276618

Cylinder Lock

For locking (stirrup Ø 3)

Description	Article Number
For locking (stirrup Ø 3)	107115

Subject to technical modifications, dimensions, weights, construction types, and delivery possibilities. Figures are for indicative purposes only.

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