R. STAHL 8530/1-MCB-STA103-B16-500-4 Line Protection Circuit Breaker

Article Number: 293886

Product Overview

The R. STAHL 8530 series line protection circuit breakers, specifically the 8530/1-MCB-STA103-B16-500-4 model, offer excellent current limitation during short circuits and high switching capacities of 10, 15, or 25 kA. This ensures minimal load on lines and high selectivity with upstream fuses. The components feature a modular design and are available in 1 to 4-pole versions with nominal currents from 0.5–63 A. The maximum installation capacity is 4.5 partial units (UP).

Key features include:

Isolation function according to EN 60947-2
Energy limitation class 3
Easy replacement or system extension with modular circuit breaker design
Simple snap-on mounting on a DIN rail in Ex e enclosures
Fixed magneto-thermal releases
Ergonomic control lever for safe operation and shutdown
Padlock protection (accessories) to prevent restart during maintenance

Technical Characteristics

Explosion Protection

Application Area (Zones)	1, 2
Application Area (Zones) Note	Usable in Zone 21 / 22 with protection via 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)
Conformity Certificate (ATEX)	Conformity Certificate (ATEX)

Electrical Characteristics

Rated Operational Voltage AC	230/400 V
Rated Operational Current	16 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

Environmental Conditions

Ambient Temperature	-40 °C ... 70 °C
Ambient Temperature Note	Different ambient temperatures based on current certificates, upon request

Mechanical Characteristics

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 Aux. Contact	0.5 mm²
Max. Connection Terminal Aux. Contact	4 mm²
Min. AWG Connection Terminal Aux. Contact	18 (unece.unit.AWG)
Max. AWG Connection Terminal Aux. Contact	14 (unece.unit.AWG)
Minimum Tightening Torque	2 N·m
Maximum Tightening Torque	3 N·m
Connection Terminal Note	2 conductors (upper and lower chamber simultaneously): Upper and lower chamber max. 16 / 10 mm² (Connection can be made with a maximum section difference between the upper and lower chamber.) Allowed connection terminal combinations are indicated in the operating manual.
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

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 Drawings

Diagrams illustrating dimensions and tripping characteristics are provided in the original document. These include:

Dimensional drawings showing overall width, length, and mounting depth.
A tripping characteristic curve showing the relationship between multiples of the rated current (I/In) and time in seconds for AC and DC.
Layout diagrams for different configurations, including 3-pole with auxiliary contacts.

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 device	227232

Fixing Kit

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

Cylinder Lock

Description	Article Number
For locking (shackle Ø 3)	107115

Note: Technical characteristics, dimensions, weights, construction types, and delivery options are subject to change without notice. Figures are for illustrative purposes only.

	R. STAHL 8530/1-MCB-STA103-B16-500-4 Miniature Circuit Breaker - Technical Data Detailed technical specifications and features of the R. STAHL 8530/1-MCB-STA103-B16-500-4 miniature circuit breaker, including explosion protection, electrical data, mechanical data, and accessories.
	R. STAHL 8530/1-MCB-STA103-B16-500-4 Circuit Breaker Technical Data Technical specifications and features of the R. STAHL 8530/1-MCB-STA103-B16-500-4 circuit breaker, including explosion protection, electrical data, mechanical data, and accessories.
	R. STAHL 8530/1-MCB-STA103-B16-500-4 Miniature Circuit Breaker Technical Data Technical specifications and features for the R. STAHL 8530/1-MCB-STA103-B16-500-4 miniature circuit breaker, including explosion protection, electrical data, mechanical data, and accessories.
	R. STAHL 8530/1-MCB-STA103-C63-500-4 Miniature Circuit Breaker - Technical Specifications Detailed technical specifications for the R. STAHL 8530/1-MCB-STA103-C63-500-4 Miniature Circuit Breaker, including features, electrical characteristics, environmental conditions, and dimensions. Suitable for explosion protection applications.
	R. STAHL 8530/1-MCB-STA103-C25-500-4 Line Protection Circuit Breaker Technical Data Detailed technical specifications, features, and application information for the R. STAHL 8530/1-MCB-STA103-C25-500-4 line protection circuit breaker, including explosion protection data and electrical characteristics.
	R. STAHL 8530/1-MCB-STA103-C16-500-4 Miniature Circuit Breaker - Technical Specifications Detailed technical specifications for the R. STAHL 8530/1-MCB-STA103-C16-500-4 miniature circuit breaker, including explosion protection, electrical data, mechanical data, and accessories. Suitable for system solutions in hazardous environments.
	R. STAHL 8530/1-MCB-STA103-C16-000-3 Circuit Breaker Technical Specifications Detailed technical specifications for the R. STAHL 8530/1-MCB-STA103-C16-000-3 circuit breaker, including electrical data, environmental conditions, mechanical data, and accessories. Suitable for use in hazardous locations.
	R. STAHL 8530/1-MCB-STA103-C50-500-4 Miniature Circuit Breaker Technical Data Detailed technical specifications and features of the R. STAHL 8530/1-MCB-STA103-C50-500-4 miniature circuit breaker, including explosion protection, electrical data, mechanical data, and accessories.