The MRT1 Reed Relay (Signalling Relay) is a high-reliability switching device specially designed for railway signalling systems, interlocking control, industrial automation, and safety-critical applications.
Built with nitrogen-sealed reed contacts, the MRT1 signalling relay delivers maintenance-free operation, ultra-long service life, and stable signal switching performance. Its sealed IP5X epoxy housing, high insulation strength, and anti-vibration structure make it ideal for harsh operating environments such as rail transit, petrochemical plants, power systems, elevators, medical devices, cranes, and steel manufacturing facilities.
Designed for demanding industrial applications, the MRT1 reed relay offers multiple contact configurations, strong electrical performance, and exceptional durability.
Key Features of MRT1 Signalling Relay
Nitrogen-Sealed Reed Contacts for Maximum Reliability
The MRT1 relay adopts nitrogen-filled hermetically sealed reed contacts, ensuring:
- Long mechanical life up to 100 million operations
- High switching reliability
- Maintenance-free performance
- Excellent resistance to oxidation and contamination
This makes it ideal for railway signalling relay systems and industrial control circuits requiring long-term stability.
IP5X Sealed Housing for Harsh Environments
The relay housing features epoxy resin sealing with IP5X front protection, offering excellent resistance to:
- High temperature and humidity
- Vibration and shock
- Industrial dust and harsh conditions
Suitable for demanding applications in rail transportation, elevators, power electronics, water treatment, and port facilities.
Multiple Contact Configurations
The MRT1 series provides flexible contact arrangements for different signalling and control needs:
| Model | Contact Form |
|---|---|
| MRT1-4A-D | 4NO |
| MRT1-2A2B-D | 2NO / 2NC |
| MRT1-3A1B-D | 3NO / 1NC |
| MRT1-4B-D | 4NC |
Enabling easy integration into various signal relay and automation systems.
Wide Switching Capability
The relay supports broad load compatibility:
- Rated Operating Current
- AC: 0.3A / 220VAC
- DC: 0.3A / 110VDC
- Maximum Switching Current: 1A
- Maximum Breaking Current:
- AC: 0.5A
- DC: 0.5A
- Minimum Operating Voltage: 24V / 1mA
Suitable for low-current signal switching and precision control applications.
High Electrical Safety & Insulation
Designed for high-reliability control systems:
- Rated Insulation Voltage: 250VAC
- Short-Time Withstand Current: 8A, 10s (TB/T 2762-2017 standard)
Dielectric Strength
- Between open contacts: 500VAC / 1min
- Between contacts & coil / reed switches / terminals to ground: 1500VAC / 1min
Insulation Resistance
- Between open contacts: ≥200MΩ at 500VDC
- Contact-to-coil / between reed switches / ground: ≥200MΩ at 1000VDC
Ensures stable operation in high-demand railway signalling and industrial safety systems.
Fast Response Performance
The MRT1 signalling relay delivers fast and precise switching:
- Operate Time: 20ms
- Bounce Time: 5ms
- Release Time: 30ms
Providing accurate signal transmission and control response.
Premium Contact Material
- Optional Contact Material: Ru (Ruthenium)
- Contact Melting Point: ≥2600°C
Offering excellent wear resistance and switching durability.
| Parameter | Specification |
|---|---|
| Relay Type | MRT1 Signalling Reed Relay |
| Contact Configuration | 4NO / 2NO2NC / 3NO1NC / 4NC |
| Protection Rating | IP5X |
| Insulation Voltage | 250VAC |
| Max Switching Current | 1A |
| Short-Time Withstand Current | 8A / 10s |
| Mechanical Life | Up to 100 Million Operations |
| Operate Time | 20ms |
| Release Time | 30ms |
| Contact Resistance | ≤150mΩ (6V/100mA) |
| Minimum Contact Current | 1mA |
| Coil Type | DC Coil |
| Plug Type | Standard 11-Pin Plug |
Typical Applications of MRT1 Signalling Relay
The MRT1 signalling relay is widely used in:
- Rail Transit & Railway Signalling Systems
- Door Interlocking Systems
- Automatic Parking Systems
- Petrochemical Facilities
- Power Electronic Equipment
- Elevators & Lifting Systems
- Medical Devices
- Port Facilities & Crane Loading Systems
- Automotive Industry Equipment
- Machine Tools & Industrial Automation
- Water Treatment Plants
- Steel Mills & Blast Furnace Systems
