Phoenix Contact REL-MR-24DC/21-21/ATEX Single Relay, DPDT, 24V DC, AgNi Contact, PC Pin, ATEX/IECEx Approved

Phoenix Contact REL-MR Series Miniature Power Relay — ATEX/IECEx Approved

The Phoenix Contact REL-MR-24DC/21-21/ATEX (Mfr. No. 2906213) is a plug-in miniature power relay from the REL-MR Series, designed for demanding industrial automation and control panel applications in hazardous locations. This relay features RT III sealed construction with AgNi power contacts, a 24V DC coil, and PC pin (solder pin) connection for direct PCB or relay base mounting.

Approved for use in ATEX/IECEx Zone 2 and Class I, Division 2 hazardous environments when installed with the corresponding PLC relay base, making it the go-to choice for oil and gas, chemical processing, and other industrial facilities with explosive atmosphere concerns.

Key Specifications

• Manufacturer Part No.: 2906213
• Coil Voltage: 24V DC nominal
• Contact Configuration: DPDT — 2 changeover contacts
• Contact Material: AgNi (silver-nickel)
• Connection Method: PC pin (solder connection)
• Sealing: RT III sealed
• Limiting Continuous Current: 8A
• Max Switching Voltage: 250V AC / 250V DC
• Max Inrush Current: 25A (20 ms)
• Interrupting Rating: 2000 VA at 250V AC; 190W at 24V DC
• Coil Resistance: 1440 Ω ±10% at 20°C
• Typical Input Current: 17 mA at nominal voltage
• Power Dissipation: 0.41W at nominal
• Typical Response Time: 7 ms
• Typical Release Time: 3 ms
• Operating Temperature: -40°C to +85°C
• Storage Temperature: -40°C to +85°C
• Mechanical Service Life: 3 × 10⁷ cycles
• Test Voltage (coil/contact): 5 kV AC (50 Hz, 1 min.)
• Test Voltage (contact/contact): 2.5 kV AC (50 Hz, 1 min.)
• Operating Mode: 100% duty cycle
• Mounting Position: Any orientation
• Pollution Degree: 3
• Overvoltage Category: III
• Insulation: Basic insulation per IEC 60664

Physical Dimensions

• Width: 12.7 mm
• Height: 29 mm
• Depth: 15.7 mm
• Weight: 80 g
• Country of Origin: Austria
• UPC/GTIN: 4055626047409

Approvals & Certifications

• UL Recognized / cUL Recognized (File E 228652)
• VDE Certified
• EAC Certified
• ATEX Approved (Zone 2) — with corresponding PLC base
• IECEx Approved (Zone 2) — with corresponding PLC base
• Class I, Division 2 — with corresponding PLC base
• ISA-S71.04 G3 Harsh Group (Corrosive Gas Test)
• China RoHS Compliant — Environmentally Friendly Use Period: Unlimited
• Standards: IEC 60664, EN 50178

Applications

Ideal for industrial automation control panels, PLC interface circuits, oil and gas facilities, chemical processing plants, and any installation requiring certified hazardous location relay switching in ATEX Zone 2 or NEC Class I, Division 2 environments.