5S series miniature circuit breakersDetailed product description：

5S series miniature circuit breaker

Product Introduction

Miniature circuit breakers are used for low-voltage electrical equipment to protect conductors, switches, and appliances, prevent overload and circuit breakers. They can meet various conditions related to electrical equipment, representing the best technical and economic solutions in various industries, and are widely used in industries such as industry, government facilities, high-tech public facilities, and home appliances. They are manufactured according to the current international standard (IEC60898) and are divided into 7 product series, covering a current range of 0.3A~125A and a voltage of 230/400V. They can also be classified according to their related accessories and auxiliary switches. They are installed on 35mm symmetrical guardrails that comply with EN50022 and DIN46277 standards using interlocking.  
The Siemens 5S series miniature circuit breakers are mainly used for overload and short circuit protection of electrical equipment such as distribution lines, loads, and lighting.

Structure and functional components (see figure below)

----------------(1) Combination type terminal block;  
----------------(2) Hot bimetallic strip for overload protection;  
----------------(3) Electromagnetic release for short-circuit protection;  
----------------(4) Mechanical locking and handle device;  
----------------(5) Contact system;  
----------------(6) Quick arc extinguishing system;  
----------------(7) Shell and rail components.   

Main functional features:
1. Use funnel-shaped combination terminal blocks to make wiring simple and reliable; It can be easily connected to the busbar and the terminal capacity of the incoming or outgoing lines can be increased to 35mm2 through additional wiring terminals
2. The contact system adopts silver alloy material (silver tin or silver graphite), truly achieving no fusion welding.  
3. Adopting a fast arc extinguishing system, consisting of moving contact locking plate, arc guide plate, magnetic blowing metal plate, and metal arc extinguishing grid plate and other components. There are up to 13 metal grids in the arc extinguishing chamber that can quickly extinguish the arc, with an average short-circuit breaking time of only 3.7 ms
4. The energy limit level is higher than level 3 (the energy value is only 50% of level 3).  
5. Selectively cooperate and protect well. It can form good selective protection with higher-level fuses, molded case circuit breakers and other products.  
6. All circuit breakers can meet the standards of IEC898, with a breaking capacity of up to 10KA (if used in industrial IEC947-2 standards, up to 25KA)
7. There are four types of circuit breaker tripping characteristics: A, B, C, and D, with a rated current range of 0.3-125A. It can be applied to various different usage ranges.  
The casing of the circuit breaker is made of thermosetting material, which has high heat resistance and impact strength, as well as high insulation strength.  
9. The appearance of the circuit breaker is a standard modular structure, with a small volume and light weight; The installation components are made of metal sheets and springs, which can be securely clamped onto a 35mm standard guide rail.  
10. The circuit breaker can be connected to various accessories, such as a locking device for handle locking, which can prevent unrelated personnel from operating the circuit breaker. In addition, there are accessories such as auxiliary switches, fault alarm switches, shunt release, undervoltage release, etc. to choose from.   

Basic parameters and technical characteristics of 5S series miniature circuit breakers:

Rated working voltage: AC230/400V (maximum up to AC250/440V);  DC220/440V 
Rated working current: 0.3-125A
Polar numbers: 1P, 2P, 3P, 4P, 1P+N, 3P+N
Release characteristics: A, B, C, D
Breaking capacity: 4.5KA, 6KA, 10KA (including DC)
Compliant with standards such as IEC898, GB10963, and CCC safety certification. 4. Dimensions: Width is a multiple of 18mm (1 module)

Characteristics
According to IEC 898 standard, the rated breaking capacity can reach up to 10kA
Excellent current limiting effect and selectivity
The disengagement characteristics are A, B, C, D
Quick accessory installation using mechanical card mounting
Combination terminal blocks can simultaneously connect busbars and feeder cables
According to DIN VDE 0660 Part 107 standard, it also has isolation function (5SP4)
According to EN 60 204, it also has a main switch function (5SP4)
Independent switch position indicator (5SP4)
According to DIN VDE 01 006 Part 100 standard, it can prevent electric shock to fingers and the back of the hand

Release characteristics	Release characteristics at room temperature of 30 ° C
meet the standard	Release characteristics	Thermal trip test current low test current	High test current	tripping time 63A ≤In ≤125A	Electromagnetic trip test current holding	Latest release	tripping time
IEC 898/EN 60898 DIN VDE 0641 Part 11	A	1.13xln	1.45xln	>1h  >2h <1h  <2h	2xln	3xln	≥0.1s <0.1s
	B	1.13xln	1.45xln	>1h  >2h <1h  <2h	3xln	5xln	≥0.1s <0.1s
	C	1.13xln	1.45xln	>1h  >2h <1h  <2h	5xln	10xln	≥0.1s <0.1s
	D	1.13xln	1.45xln	≥1h  >2h <1h  <2h	10xln	20xln	≥0.1s <0.1s

At other operating temperatures, the change in delayed trip current is approximately 5% for every 10 degree temperature difference, and increases below 30 ° C and decreases above 30 ° C.  

For DC (direct current), the instantaneous trip limit current increases by a coefficient of 1.2.