R. STAHL 8530/1-MCB-STA103-C25-500-4 Circuit Breaker

Article Number: 293902

Product Overview

The R. STAHL 8530/1-MCB-STA103-C25-500-4 circuit breaker is part of the system technology components. It offers excellent current limitation in case of short circuits and high breaking capacities of 10, 15, or 25 kA, resulting in reduced stress on electrical lines and improved selectivity with upstream fuses. The modular design allows for 1 to 4 pole configurations and nominal currents from 0.5–63 A. The maximum mounting width is 4.5 division units.

Key Features

Separator Function: Complies with EN 60947-2.
Energy Limitation Class: Class 3.
Easy Installation: Simple substitution or expansion of installations due to modular design.
Mounting: Easy mounting by clipping onto a DIN mounting rail in Ex e enclosures.
Trip Mechanism: Thermomagnetic and magnetic tripping adjusted permanently.
Ergonomic Lever: Ensures safe connection and disconnection.
Reconnection Protection: Protection against reconnection during maintenance using padlocks (accessories).

Technical Data

Explosion Protection

Attribute	Value
Applications (Zones)	1, 2
Applications (Zones) Note	Can be used in zones 21/22 with protective enclosure Ex tb/tc
IECEX Gas Certification	IECEX FMG 19.0029U
IECEx Gas Explosion Protection	Ex db eb IIC Gb
ATEX Gas Certification	FM19ATEX0191U
ATEX Gas Explosion Protection	II 2 G Ex db eb IIC Gb
Certifications	ATEX (FM), Brazil (ULB), China (CQST), IECEX (FM)
Certificate of Conformity	Certificate of Conformity (ATEX)

Electrical Data

Attribute	Value
Rated Operating Voltage AC	230/400 V
Rated Operating Current	25 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 + Signal contact 1 changeover
Rated Voltage 1st Auxiliary Function AC	230 V
Max. Current 1st Auxiliary Function	2 A
2nd Auxiliary Function	None
Max. Voltage 2nd Auxiliary Function DC	N/A
Tripping Characteristic	C
Number of Poles	3-pole

Environmental Conditions

Attribute	Value
Ambient Temperature	-40 °C ... 70 °C
Ambient Temperature (Fahrenheit)	-40 °F ... 158 °F
Ambient Temperature Note	Divergent ambient temperatures based on valid certificates upon request

Mechanical Data

Attribute	Value
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 Size	16 AWG
Maximum AWG Connection Size	4 AWG
Minimum 2 Connection Size	1.5 mm²
Maximum 2 Connection Size	10 mm²
Minimum 2 AWG Connection Size	16 AWG
Maximum 2 AWG Connection Size	8 AWG
Minimum HIKO Connection Size	0.5 mm²
Maximum HIKO Connection Size	4 mm²
Minimum HIKO AWG Connection Size	18 (unece.unit.AWG)
Maximum HIKO AWG Connection Size	14 (unece.unit.AWG)
Minimum Tightening Torque	2 N·m
Maximum Tightening Torque	3 N·m
Connection Size Note	2 conductors (top and bottom chamber simultaneously): bottom and top chambers max. 16 / 10 mm² (only one cross-section difference between top and bottom chamber can be connected). Permitted connection size combinations are listed in the user manual.

Dimensions

Attribute	Value
Width	110 mm (4.33 in)
Length	165 mm (6.5 in)
Installation Depth	138.3 mm (5.44 in)
Weight	1.8 kg (3.969 lb)

Mounting / Installation

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

Technical Diagrams

Trip Characteristic Curve

A graph showing the tripping characteristic curve for tripping characteristic C, illustrating the relationship between the multiple of the rated current (I/In) and the tripping time in seconds and minutes. The curve indicates the time delay for different current levels, with specific points highlighted for different multiples of the rated current.

Measurement Diagram

A dimensional drawing of the circuit breaker, showing its overall size and mounting details. Key dimensions are provided in millimeters with inch equivalents in parentheses: Width 110 mm [4.33 in], Length 165 mm [6.50 in], Installation Depth 138.3 mm [5.44 in]. It also indicates the unit's division width as 8530/1; 4 division units.

Accessories

Cylinder Lock: For locking (stirrup Ø 3). Article Number: 107115.
Quadruple Locking Device: Locking/tagging tool for individual component locking using up to 4 cylinder locks. Article Number: 227232.
Fixing Kit: A set of fixings for mounting the component onto a mounting plate without a top-hat rail. Article Number: 276618.

R. STAHL reserves the right to modify technical data, dimensions, weights, constructions, and delivery options.

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