Phoenix Contact 2987901 REL-MR-120AC/21HC/MS Single relay

The Phoenix Contact REL-MR-120AC/21HC/MS is a plug-in miniature single relay with 120 V AC coil voltage and 1 changeover contact rated at 16 A continuous and 250 V AC/DC maximum switching voltage. An integrated test button, mechanical switching position indicator, and status LED provide instant diagnostics and manual operation capability without requiring live circuits.

Technical specifications:

• Part designation: REL-MR-120AC/21HC/MS
• Catalog number: 2987901
• Manufacturer: Phoenix Contact
• EAN: 4046356481038
• Product type: Single relay
• Nominal input voltage: 120 V AC
• Input voltage range: 93.6 V AC - 174 V AC
• Mains frequency: 50/60 Hz
• Contact switching type: 1 changeover contact
• Contact material: AgNi
• Maximum switching voltage: 250 V AC/DC
• Limiting continuous current: 16 A
• Maximum inrush current: 32 A (20 ms)
• Minimum switching current: 10 mA at 12 V
• Interrupting rating (ohmic load): 4000 VA at 250 V AC
• Motor load (UL 508): 1 HP at 240 V AC N/O, 1/2 HP at 120 V AC N/O
• Test voltage (winding/contact): 5 kV AC (50 Hz, 1 min)
• Maximum power dissipation: 0.84 W
• Mechanical service life: 5 x 10^6 cycles
• Connection method: Plug / solder connection
• Dimensions (W x H x D): 12.7 mm x 29 mm x 25 mm
• Weight (excluding packing): 17.58 g
• Ambient temperature (operation): -40°C - 70°C
• Ambient temperature (storage/transport): -40°C - 85°C
• Corrosive gas resistance: ISA-S71.04 G3 Harsh Group
• Pack size: 10 pc
• Country of origin: CN
• Approvals: UL Recognized, cUL Recognized (File E 195083), EAC, VDE (40027210)

Features and benefits:

• Manual test button enables switching verification without applying live power to the circuit
• Status LED and mechanical indicator provide instant visual confirmation of relay switching state
• 16 A continuous and 32 A inrush ratings handle demanding resistive and motor load applications
• Wide input voltage range of 93.6 V AC - 174 V AC accommodates real-world mains fluctuations
• -40°C to 70°C operating temperature range and G3 corrosive gas rating suit harsh industrial environments

Applications:

• Switching of lighting, HVAC, and auxiliary control circuits operating at 120 V AC
• Motor control up to 1 HP at 240 V AC in UL 508 listed control panels
• PLC output relay logic in industrial automation and process control systems
• Building automation signal switching where corrosive atmosphere resistance is required

Compliant with EN 61810-1, VDE 0435-201, and EN 50178. UL Recognized and cUL Recognized under File E 195083. Requires a compatible relay base such as the RIF-1-BPT/2X21 (2900931) or RIF-1-BSC/2X21 (2900930) for NS 35/7.5 DIN rail mounting.

Also known as: Phoenix Contact REL-MR-120AC/21HC/MS, Phoenix 2987901, Phoenix Contact 120V AC miniature relay, Phoenix Contact plug-in power relay 16A.