Phoenix Contact 2987998 REL-MR-230AC/21-21AU/MS Single relay

The REL-MR-230AC/21-21AU/MS is a Phoenix Contact plug-in miniature single relay with multi-layer hard gold-coated 2 changeover contacts and a 230 V AC coil. It incorporates a test button, mechanical switching position indicator, and integrated status LED, making it well suited to industrial control and signal-switching applications that require visual diagnostics and reliable low-level contact performance.

Technical specifications:

• Part designation: REL-MR-230AC/21-21AU/MS
• Catalog number: 2987998
• Manufacturer: Phoenix Contact
• EAN: 4046356481007
• Product type: Single relay, monostable, non-polarized
• Coil voltage: 230 V AC (range: 179.4 to 333.5 V AC, 50/60 Hz)
• Typical input current at UN: 3.5 mA
• Contact switching type: 2 changeover contacts, AgNi hard gold-plated
• Max inrush current: 16 A (20 ms, post gold-layer)
• Limiting continuous current: 8 A (post gold-layer)
• Max switching voltage: 250 V AC/DC (post gold-layer)
• Min switching current: 1 mA at 12 V (gold contact)
• Switching capacity: 1.5 A at 240 V AC15
• Test voltage (winding/contact): 5 kV AC (50 Hz, 1 min.)
• Max power dissipation: 0.42 W
• Mechanical service life: 5 x 10^6 cycles
• Dimensions (W x H x D): 12.7 x 29 x 25 mm
• Weight (excl. packing): 18.18 g
• Operating temperature: -40 °C to 70 °C
• Storage temperature: -40 °C to 85 °C
• Connection method: Plug/solder
• Pack size: 10 pc | Country of origin: CN

Features and benefits:

• Hard gold-coated AgNi contacts provide reliable switching from as low as 1 mA at 12 V
• Integrated status LED and mechanical switching position indicator enable instant visual diagnostics
• Detectable manual test button allows operation verification without energizing the coil
• Wide -40 °C to 70 °C operating range suits demanding industrial environments
• ISA-S71.04 G3 Harsh Group rated for reliable performance in corrosive atmospheres

Applications:

• PLC output interfacing and signal isolation in 230 V AC automation panels
• Low-level signal switching where gold contacts prevent oxidation-related contact failures
• Building automation and HVAC control circuits
• Machine control in harsh or corrosive industrial environments

Compliant with EN 61810-1, VDE 0435-201, and EN 50178. Approved by UL (FILE E 195083), cUL (FILE E 195083), EAC, and VDE (40027210). Fulfills EU RoHS requirements; no REACH SVHC substances above 0.1 wt%.

Also known as: Phoenix Contact REL-MR-230AC/21-21AU/MS, Phoenix 2987998, 230VAC plug-in miniature relay, gold contact 2CO relay.