Siemens LZS:RT coupling relays are 15.5 mm complete units with an 8-pole plug-in print relay (5 mm pinning), socket, LED module, fixing/ejection bracket and labeling plate. Versions with standard socket or socket with logical separation are available.
Technical data
| Series | RT |
|---|---|
| Width | 15.5 mm |
| Contacts | 1 veya 2 CO |
| Control supply voltage | 24 V DC, 24 / 115 / 230 V AC |
| Relay degree of protection | IP67 |
| Mounting | Snap-on mounting on TH35 DIN rail (IEC 60715) |
| Rated insulation voltage Ui | 250 V (pollution degree 3) |
| Ambient temperature | Operation −40…+70 °C, storage −40…+80 °C |
| Degree of protection (socket) | IP20 |
Article numbers
| Socket | LED module | Uc | Contacts | Article No. |
|---|---|---|---|---|
| Standard socket, screw | Red LED + freewheeling diode | 24 V DC | 1 CO | LZS:RT3A4L24 |
| Standard socket, screw | Red LED | 24 V AC | 1 CO | LZS:RT3A4R24 |
| Standard socket, screw | Red LED | 115 V AC | 1 CO | LZS:RT3A4S15 |
| Standard socket, screw | Red LED | 230 V AC | 1 CO | LZS:RT3A4T30 |
| Standard socket, screw | Red LED + freewheeling diode | 24 V DC | 2 CO | LZS:RT4A4L24 |
| Standard socket, screw | Red LED | 24 V AC | 2 CO | LZS:RT4A4R24 |
| Standard socket, screw | Red LED | 115 V AC | 2 CO | LZS:RT4A4S15 |
| Standard socket, screw | Red LED | 230 V AC | 2 CO | LZS:RT4A4T30 |
| Standard socket, screw | Green LED + freewheeling diode | 24 V DC | 1 CO | LZS:RT3A4L24A |
| Standard socket, screw | Green LED + freewheeling diode | 24 V DC | 2 CO | LZS:RT4A4L24A |
| Socket with logical separation, screw | Red LED + freewheeling diode | 24 V DC | 1 CO | LZS:RT3B4L24 |
| Socket with logical separation, screw | Red LED | 24 V AC | 1 CO | LZS:RT3B4R24 |
| Socket with logical separation, screw | Red LED | 115 V AC | 1 CO | LZS:RT3B4S15 |
| Socket with logical separation, screw | Red LED | 230 V AC | 1 CO | LZS:RT3B4T30 |
| Socket with logical separation, screw | Red LED + freewheeling diode | 24 V DC | 2 CO | LZS:RT4B4L24 |
| Socket with logical separation, screw | Red LED | 24 V AC | 2 CO | LZS:RT4B4R24 |
| Socket with logical separation, screw | Red LED | 115 V AC | 2 CO | LZS:RT4B4S15 |
| Socket with logical separation, screw | Red LED | 230 V AC | 2 CO | LZS:RT4B4T30 |
| Socket with logical separation, screw | Green LED + freewheeling diode | 24 V DC | 1 CO | LZS:RT3B4L24A |
| Socket with logical separation, screw | Green LED + freewheeling diode | 24 V DC | 2 CO | LZS:RT4B4L24A |
| Socket with logical separation, spring-loaded (push-in) | Red LED + freewheeling diode | 24 V DC | 1 CO | LZS:RT3D4L24 |
| Socket with logical separation, spring-loaded (push-in) | Red LED | 24 V AC | 1 CO | LZS:RT3D4R24 |
| Socket with logical separation, spring-loaded (push-in) | Red LED | 115 V AC | 1 CO | LZS:RT3D4S15 |
| Socket with logical separation, spring-loaded (push-in) | Red LED | 230 V AC | 1 CO | LZS:RT3D4T30 |
| Socket with logical separation, spring-loaded (push-in) | Red LED + freewheeling diode | 24 V DC | 2 CO | LZS:RT4D4L24 |
| Socket with logical separation, spring-loaded (push-in) | Red LED | 24 V AC | 2 CO | LZS:RT4D4R24 |
| Socket with logical separation, spring-loaded (push-in) | Red LED | 115 V AC | 2 CO | LZS:RT4D4S15 |
| Socket with logical separation, spring-loaded (push-in) | Red LED | 230 V AC | 2 CO | LZS:RT4D4T30 |
| Socket with logical separation, spring-loaded (push-in) | Green LED + freewheeling diode | 24 V DC | 1 CO | LZS:RT3D4L24A |
| Socket with logical separation, spring-loaded (push-in) | Green LED + freewheeling diode | 24 V DC | 2 CO | LZS:RT4D4L24A |
Technical data and article numbers are based on Siemens catalog IC 10 · 2026 (chapter 5, LZS coupling relays with plug-in relays) and are for information only. Image is representative.
For price, stock and lead time, use the Request a Quote button or call +90 533 945 27 94. Sending the article number is enough.
Tags: LZS:RT, siemens coupling relay, LZS relay, plug-in relay, interface relay, LZS:RT3A4L24, LZS:RT3A4R24, LZS:RT3A4S15, LZS:RT3A4T30, LZS:RT4A4L24, LZS:RT4A4R24, LZS:RT4A4S15, LZS:RT4A4T30, LZS:RT3A4L24A, LZS:RT4A4L24A, LZS:RT3B4L24, LZS:RT3B4R24, LZS:RT3B4S15, LZS:RT3B4T30, LZS:RT4B4L24, LZS:RT4B4R24, LZS:RT4B4S15, LZS:RT4B4T30, LZS:RT3B4L24A, LZS:RT4B4L24A, LZS:RT3D4L24, LZS:RT3D4R24, LZS:RT3D4S15, LZS:RT3D4T30, LZS:RT4D4L24, LZS:RT4D4R24, LZS:RT4D4S15, LZS:RT4D4T30, LZS:RT3D4L24A, LZS:RT4D4L24A