Phoenix Contact 2987888 REL-MR-24DC/21HC/MS Single relay

The REL-MR- 24DC/21HC/MS is a plug-in miniature single relay from Phoenix Contact, featuring one changeover contact rated for 16 A continuous current and a 24 V DC nominal coil. It includes a test button, mechanical switching position indicator, integrated status LED, and freewheeling diode for diagnostics and coil-side protection in compact control panel installations.

Technical specifications:

• Part designation: REL-MR- 24DC/21HC/MS
• Catalog number: 2987888
• Manufacturer: Phoenix Contact
• EAN: 4046356481014
• Product type: Single relay
• Pack size: 10 pc
• Nominal input voltage: 24 V DC
• Input voltage range: 19.2 V DC - 52.8 V DC
• Contact type: 1 changeover contact, AgNi material
• Limiting continuous current: 16 A
• Maximum inrush current: 32 A (20 ms)
• Maximum switching voltage: 250 V AC/DC
• Interrupting rating: 4000 VA max. at 250 V AC
• Typical input current: 18 mA at nominal voltage
• Response / release time: 9 ms / 6 ms
• Test voltage (winding/contact): 5 kV AC (50 Hz, 1 min.)
• Max. power dissipation: 0.43 W
• Mechanical service life: 5 x 10^6 cycles
• Connection method: plug/solder
• Dimensions (W x H x D): 12.7 mm x 29 mm x 25 mm
• Weight: 17.64 g (excl. packing)
• Operating temperature: -40°C to 70°C
• Country of origin: CN
• Approvals: cUL, UL (FILE E 195083), EAC, VDE

Features and benefits:

• Test button enables detectable manual operation for circuit verification without a live load
• Mechanical switching position indicator and status LED give instant visual contact state confirmation
• Integrated freewheeling diode suppresses inductive voltage spikes on the 24 V DC coil
• 16 A continuous current rating with 32 A inrush capacity handles demanding resistive and motor loads
• -40°C to 70°C operating range and ISA-S71.04 G3 corrosive gas rating suit harsh industrial environments

Applications:

• Machine control panels switching motors up to 1 HP at 240 V AC
• Industrial automation and HVAC systems operating at up to 250 V AC/DC
• Control cabinets requiring relay status monitoring and on-site manual test functionality

Compliant with EN 61810-1, EN 50178, and VDE 0435-201. EU RoHS substance requirements fulfilled; no REACH SVHC candidate substances above 0.1 wt%.

Also known as: Phoenix Contact REL-MR- 24DC/21HC/MS, Phoenix 2987888, Phoenix Contact miniature relay 24VDC 16A.