Phoenix Contact 2903686 REL-IR4/L-24AC/4X21 Single relay

The REL-IR4/L- 24AC/4X21 is a Phoenix Contact plug-in industrial single relay with four changeover contacts and a 24 V AC coil, featuring a test button, yellow status LED, and mechanical switching position indicator. Rated 6 A continuous and 250 V AC/DC switching, it carries ISA-S71.04 G3 corrosive gas approval for demanding industrial environments.

Technical specifications:

• Part designation: REL-IR4/L- 24AC/4X21
• Catalog number: 2903686
• Manufacturer: Phoenix Contact
• EAN: 4046356758994
• Coil voltage: 24 V AC; input range 18.7 - 33.1 V AC (20°C), 50/60 Hz
• Contacts: 4 changeover, AgNi; 6 A continuous, 16 A inrush (20 ms)
• Max switching voltage: 250 V AC/DC; interrupting rating 1500 VA at 250 V AC
• Motor load (UL 508): 1/3 HP, 240 V AC
• Test voltage (winding/contact): 2.5 kVrms; rated surge voltage: 2.5 kV
• Operating mode: 100% operating factor, monostable, non-polarized
• Response time: 5 - 15 ms; release time: 5 - 20 ms
• Mechanical service life: approx. 20 million cycles
• Ambient temperature: -40°C to 55°C (operation); -40°C to 85°C (storage)
• Dimensions (W x H x D): 21.2 x 27.5 x 35.6 mm; weight: 33.02 g
• Connection: plug-in; mounts any position on NS 35/7.5 DIN rail via relay base
• Insulation: basic; overvoltage category II; pollution degree 2
• Pack size: 10 pc
• Approvals: CSA, VDE, cULus Recognized (E172140)

Features and benefits:

• Test button allows manual relay actuation without energizing the coil
• Yellow LED and mechanical position indicator give instant visual status confirmation
• Wide input range (18.7 - 33.1 V AC) tolerates supply voltage fluctuations
• 100% operating factor enables continuous-duty use without derating
• ISA-S71.04 G3 rating qualifies this relay for harsh corrosive atmospheres

Applications:

• PLC output isolation in industrial control and machine automation cabinets
• Motor pilot circuits up to 1/3 HP, 240 V AC
• HVAC and building automation panels with 24 V AC control voltage

Compliant with IEC 60664 and IEC 61810. Fulfills EU RoHS requirements with no exemptions; no REACH SVHC substances above 0.1 wt%.

Also known as: Phoenix Contact REL-IR4/L- 24AC/4X21, Phoenix 2903686, 24VAC 4CO plug-in industrial relay.