Product Description
Standex Electronics MRX Series Reed Relay, Through Hole (THT); 1A SPST-NO, 5 VDC; 0.5 Amp, < 200 VDC SWT Voltage
Reed Relay • Mounting: Through Hole (THT) • Contact Form: 1A SPST-NO • Coil Voltage: 5 VDC • Switching Voltage: < 200 VDC • Switching Current (max.): 0.5 Amp • Option: Standard • Special Feature: Intrinsically Safe
Product Information
| Manufacturer | Standex Electronics |
| Product Category | Relay |
| Product Sub Category | Reed Relay |
| Series | MRX Series |
| Catalog Part Number | MRX05-1A71 |
Specifications
| Product Attribute | Attribute Value |
|---|---|
| Mounting | Through Hole (THT) |
| Contact Form | 1A SPST-NO |
| Coil Voltage | 5 VDC |
| Switching Voltage | < 200 VDC |
| Switching Current (max.) | 0.5 Amp |
| Option | Standard |
| Special Feature | Intrinsically Safe |
| Coil Resistance (typ.) | 360 |
| Pull-In Voltage (VDC) | 3.8 |
| Drop-Out Voltage (VDC) | 1 |
| Nominal Coil Power (typ.) mw | 70 |
| Rated Power (max.) | 10 W |
| Carry Current (max.) | 1.25 A |
| Contact Resistance (max.) | 150 mOhm |
| Breakdown Voltage (min.) | 0.3 kVDC |
| Operating Time (max.) | 0.5 ms |
| Release Time (max.) | 0.1 ms |
| Insulation Resistance (typ.) | 10<sup>10</sup> ohm |
| Capacitance (typ.) | 0.3 pF |
| Shock Resistance (max.) | 50 g |
| Vibration Resistance (max.) | 20 g |
| Operating Temperature (max.) | -20 to 85 °C |
| Storage Temperature (max.) | -40 to 105°C |
| Soldering Temperature (max.) | 260 °C |
Series Features
MRX Series Reed Relay
Series DescriptionThe MRX Series is a rugged, intrinsically safe reed relay designed for hazardous environments requiring galvanic isolation between intrinsic and non-intrinsic safety circuits. Certified under ATEX (KIWA 19ATEX0051 U) and IECEx (KIWA 19.0026U) standards, the MRX Series is approved for use in Zone 0 gas and vaporous atmospheres, making it ideal for mining, chemical processing, and industrial automation.
Engineered for reliability in extreme conditions, the MRX Series operates across a wide temperature range of –40°C to +85°C, and supports peak voltages up to 375 VDC with power ratings up to 50 W. It is available in multiple contact configurations including SPST-NO (1A), SPDT (1C), DPST-NO (2A), DPDT (2C), and 4PST-NO (4A). Through-hole mounting ensures secure integration, while optional diode protection and high-isolation variants enhance safety and performance.
Type of protection: II (1) G [Ex ia Ga] IIC
In accordance with: EN 60079-0 : 2018, EN 60079-11 : 2012
- ATEX & IECEx certified for intrinsically safe applications
- Peak switching voltage up to 375 VDC, rated power up to 50 W
- Wide operating temperature range: –40°C to +85°C
- Contact configurations: 1A, 1C, 2A, 2C, 4A
- Coil voltage options: 5 VDC, 12 VDC, and 24 VDC
- Mounting type: Through-hole (THT)
- Optional diode protection for coil suppression
- High insulation and creepage distance for low leakage current
- Designed for galvanic separation in hazardous zones
- Type of protection: II (1) G [Ex ia Ga] IIC
Mining & Chemical Industry: Intrinsically safe switching in explosive atmospheres
Process Automation: Reliable relay control in hazardous zones
Test & Measurement (ATE): High-voltage isolation in precision test systems
Refineries & Petrochemical Plants: Safe signal routing in flammable environments
Industrial Controls: Galvanic isolation in safety-critical systems