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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 5ST3012 |
| Alternative Part Number | 5ST3012 |
| Manufacturer | Siemens |
| Series | 5ST3 |
| Type | Auxiliary Current Switch |
| Suitable For | 5SL, 5SY, 5SP Miniature Circuit Breaker, Incorporated switch 5TL1, RCBO 5SU1, FI 5SV |
| Current Rating | 6 A |
| Voltage Rating | 230 V ac |
| Protection Class | IP20 |
| Dimensions (W x H x D) | 9 x 70 x 90 mm |
| Number of NC Contacts | 2 |
| Electrical Endurance | 20,000 switching cycles (typical) |
| Connectable Conductor Cross-Section | 0.5 mm² - 2.5 mm² |
| Tightening Torque | 0.5 N·m (maximum) |
| Ambient Operating Temperature | -25 °C to +55 °C |
| Ambient Storage Temperature | -40 °C to +75 °C |
| Commodity Code | 853650 |
The Siemens 5ST3012 is a meticulously engineered auxiliary current switch designed to complement the 5SL, 5SY, and 5SP series of miniature circuit breakers. This switch is an integral component for electrical safety and control systems, offering a reliable solution for circuit monitoring and fault signalling. With a configuration of 2 normally closed (NC) contacts, it ensures a secure and fail-safe operation in various applications.
Crafted with precision, the 5ST3012 boasts a compact form factor with dimensions of 9 x 70 x 90 mm, making it suitable for space-constrained environments. The switch operates effectively within a voltage range of up to 230 V ac and can handle a current of up to 6 A, ensuring compatibility with a wide range of electrical systems.
The robust design of the 5ST3012 is encapsulated in an IP20-rated enclosure, providing a degree of protection against solid objects, which enhances its durability and longevity in industrial settings. Its mechanical endurance is notable, with an electrical endurance rating that promises a long service life through numerous switching cycles.
Installation and maintenance of the 5ST3012 are straightforward, thanks to its mountable design and the ability to connect conductor cross-sections ranging from 0.5 to 2.5 mm². The switch's mechanical and electrical characteristics make it a versatile choice for a variety of applications, from industrial control panels to commercial electrical distribution systems.
In summary, the Siemens 5ST3012 auxiliary current switch is a vital component for enhancing the functionality and safety of miniature circuit breakers, offering reliability and efficiency for professionals seeking quality electrical control solutions.
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Frequently Asked Questions
What is the function of this auxiliary current switch?
The auxiliary current switch is designed to work in conjunction with miniature circuit breakers, such as the 5SL, 5SY, and 5SP series, to provide additional switching capabilities. It allows for remote signalling and control by providing two normally closed (NC) contacts.
Can this switch be used with any miniature circuit breaker?
This switch is specifically designed for use with Siemens 5SL, 5SY, 5SP miniature circuit breakers, as well as the incorporated switch 5TL1, RCBO 5SU1, and FI 5SV. It may not be compatible with other types of circuit breakers.
What are the electrical endurance and mechanical specifications of this switch?
The switch has an electrical endurance of typically 20,000 switching cycles and features a compact design with dimensions of 9 x 70 x 90 mm. It is also rated with an IP20 protection class.
What type of conductors can be connected to this switch?
The switch can accommodate conductor cross-sections ranging from 0.5 mm² to 2.5 mm², and it is suitable for use with AWG conductors sized 24 to 12.
What are the environmental operating conditions for this switch?
The switch can operate within an ambient temperature range of -25 °C to +55 °C and can be stored in temperatures ranging from -40 °C to +75 °C.
How is the switch mounted to a circuit breaker?
The switch is mountable and designed to be easily attached to compatible Siemens miniature circuit breakers. It should be installed according to the manufacturer's instructions for proper operation.
What certifications does this switch hold?
The switch comes with a general product approval and a declaration of conformity, ensuring it meets the necessary regulatory standards for use.
Is there a specific torque requirement for the terminal connections?
Yes, when connecting conductors to the screw-type terminals of the switch, a maximum tightening torque of 0.5 N·m should be applied.
What is the significance of the IP20 protection class?
The IP20 protection class indicates that the switch is protected against solid objects larger than 12.5 mm but is not protected against water. It is suitable for indoor use where it is not exposed to moisture.
Can this switch be used for fault signalling?
No, this particular model does not have fault signal contacts and is not designed for fault signalling purposes.
