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Specification & Description
| Specification | Description |
|---|---|
| Part Number | LZS:RT4A4T30 |
| Alternative Part Number | LZSRT4A4T30 |
| Manufacturer | Siemens |
| Product Type | Plug-in relay complete unit |
| Supply Voltage Frequency | 50 Hz minimum, 60 Hz maximum |
| Type of Voltage | AC |
| Control Supply Voltage (at 50/60 Hz) | 230 V rated value |
| Number of Changeover Contacts | 2 |
| Operating Current (at AC-15) | 2.5 A at 230 V |
| Switching Function | Changeover switch |
| Switching Behaviour | Monostable |
| Electrical Connection | Screw-type terminals |
| Relay Operating Mechanism | Poled |
| Product Component | Jumper socket included |
| Dimensions (W x H x D) | 15.5 mm x 71 mm x 78 mm |
| Mechanical Service Life | Typical 5,000,000 operating cycles |
| Electrical Endurance | Typical 80,000 operating cycles at AC-15, 230 V |
| Thermal Current | 8 A |
| Protection Class | IP20 |
| Operating Frequency without Load | 360 operations/hour |
| Operating Frequency with Load | 36,000 operations/hour |
| Ambient Operating Temperature | -40 to +70 °C during operation |
| Certificates/Approvals | General Product Approval, Declaration of Conformity, other confirmations as applicable |
The Siemens LZS:RT4A4T30 is a robust plug-in relay complete unit designed to facilitate seamless integration into various control systems. This unit is part of the esteemed SIRIUS product line, renowned for its reliability and versatility in industrial applications. The relay features a 2 CO (changeover) contact configuration, making it suitable for a wide range of switching tasks.
Equipped with a red LED module, the LZS:RT4A4T30 provides clear status indication, enhancing operational visibility and diagnostics. The unit operates at a control supply voltage of 230 V AC, with a frequency range suitable for both 50 Hz and 60 Hz systems, ensuring compatibility with standard industrial power supplies in the UK and beyond.
The relay boasts a mechanical service life of approximately 5 million operating cycles and an electrical endurance of 80,000 cycles at AC-15 at 230 V, highlighting its durability and long-term performance. With a thermal current rating of 8 A, it can handle significant loads, making it a reliable choice for various applications.
Installation is made easy with its snap-on mounting design, and the compact dimensions (78 mm height, 15.5 mm width, and 71 mm depth) allow for efficient use of space within control cabinets. The screw-type terminals provide secure and reliable connections for solid or finely stranded wires, accommodating a range of conductor cross-sections.
The LZS:RT4A4T30 operates within an ambient temperature range of -40 to +70 °C, ensuring consistent performance even in demanding environmental conditions. Its IP20 protection class signifies that it is protected against solid objects larger than 12.5 mm, although it should be housed within an appropriate enclosure for optimal protection.
This coupling relay with plug-in relay is a testament to Siemens' commitment to quality and innovation, offering a dependable solution for electrical switching operations across various industrial sectors.
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Frequently Asked Questions
What type of relay is this?
This is a plug-in relay compact unit with a red LED module and standard plug-in socket with screw terminals.
Can this relay be used with different supply voltage frequencies?
Yes, the relay is designed to operate with a supply voltage frequency ranging from 50 Hz to 60 Hz.
What is the control supply voltage for this relay?
The control supply voltage for this relay at both 50 Hz and 60 Hz AC is rated at 230 V.
How many changeover contacts does the relay have?
The relay has 2 changeover contacts for auxiliary contacts.
What is the operating current of the auxiliary contacts at AC-15?
The operating current of the auxiliary contacts at AC-15 is 2.5 A at 230 V.
What is the design of the electrical connection?
The electrical connection is designed with screw-type terminals.
What are the dimensions of the relay?
The relay has a width of 15.5 mm, a height of 71 mm, and a depth of 78 mm.
What is the mechanical service life of the relay?
The mechanical service life of the relay is typically 5,000,000 operating cycles.
What is the thermal current rating for this relay?
The thermal current rating for the relay is 8 A.
Is there a specific mounting position required for this relay?
No, the relay can be mounted in any position.
What is the ambient operating temperature range for the relay?
The ambient operating temperature range for the relay is from -40 °C to +70 °C.
Does the relay have a positively driven switching function?
No, the design of the switching function is not positively driven; it is a monostable changeover switch.
What type of protection class does the relay have?
The relay has a protection class of IP20.
What is the required fuse for short-circuit protection of the auxiliary switch?
A gG fuse with a rating of 10 A is required for short-circuit protection of the auxiliary switch.
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