Industrial Control TRSS-485 Data Line Protection for PLC/Automation Systems
Main Features
- IEC/EN Category: D1/C1/C2
- Mode of Protection: Longitudinal, Transverse (Line-Line, Line-Ground)
- Coarse & Fine Protection: Gas Discharge Tube (GDT) + TVS Diode
- Voltage: Multiple options available (5V, 12V, 24V, 150V)
- Frequency Range: 10-20MHz
- Surge Discharge Ratings: In: 5kA, Imax: 10kA
- Series Load Current: 0.3A
- Enclosure: DIN 43880 1TE, DIN Rail Mount
- Terminals: Screw Terminals
- Housing: Modular Design
- Compliance: IEC/EN 61643-21, IEC/EN 61643-22


The TRSS-485 (18mm) is a professional-grade AC Surge Protection Device optimized for reliable signal line shielding in standard industrial control panels. Featuring a robust 18mm wide enclosure, this device provides uncompromising protection for a pair of signal lines—including RS485 and DC power paths—against transient overvoltages. By utilizing a sophisticated circuit design, this AC Surge Protection Device ensures high-frequency data transmission with minimal interference, maintaining signal integrity across long-distance communication routes.
Advanced Two-Line Protection for Industrial Reliability Designed to meet stringent industrial requirements, this Surge Protection Device is capable of handling high discharge currents while maintaining an instantaneous response time. The unit features a 35mm DIN rail installation design which saves significant labor during setup and provides a stable voltage protection level for sensitive electronic components. Fully compliant with international standards IEC 61643-21 and EN 61643-21, this SPD is available in multiple protection voltages to match specific system requirements.
Applications
Industrial RS485 communication loops requiring a robust and easy-to-install AC Surge Protection Device.
Automated control systems and measurement circuits exposed to lightning surge risks.
Security and surveillance systems where 18mm modular SPD units provide dedicated line shielding.
Facilities requiring standard DIN rail mounting for a variety of DC signal protection voltages.
Integrated wiring systems for remote signaling in infrastructure and smart building projects.
| Model | TRSS-485 | |||
| Material/width | Aluminum, PA66/ 7mm, 14mm, 18mm | |||
| Nominal volatge (Un) | 5 V | 12 V | 24 V | 100 |
| Maximum operating voltage (Uc) | 8 V | 15 V | 30 V | 110 |
| Frequency | 30 MHz | |||
| Insertion loss | ≤ 0,5 dB | |||
| Standing wave | 1,2 | |||
| Nominal discharge current (8/20μs) (In) | 5 kA | |||
| Maximum discharge current (8/20μs) (Imax) | 10 kA | |||
| Voltage protection level (Up) | <20 V | < 40 V | < 60 V | <150 V |
| Mounting | DIN rail 35mm | |||
| Degree of protection | IP20 | |||
| Range of operating temperatures (min/max) | -40℃/70℃ | |||
| Humidity range | 5%-95% | |||
| According to standard | EN 61643-21:2012, IEC 61643-21:2011 | |||
Related Products
| Uocstc | 1000v, 1250v |
|---|---|
| Ucpv | 1200v, 1500 |
| Iimp | 5kA, 7kA |
| Z0 | 50 Ohm |
|---|---|
| IL | ≤0.3dB |
| Freq. | DC-2.5GHz |
| VSWR | <1.2 |
| Uocstc | 110v, 24v, 48v, 75v |
|---|---|
| Ucpv | 180v, 36v, 65v, 80v |



