Functional Devices RIB013P-NC : Enclosed Power Relay, 20 Amp Contact Rating. Relay Contact Type: 3PST-N/C, 120 Vac Coil Voltage, NEMA 1 Housing

• Relays & Contact Type: One (1) 3PST Continuous Duty Coil – Normally Closed
• Expected Relay Life: 10 million cycles minimum mechanical
• Operating Temperature: -30 to 140° F
• Humidity Range: 5 to 95% (noncondensing)
• Operate Time: 20ms
• Relay Status: LED On = Activated
• Dimensions: 4.00" x 4.00" x 1.80" with 0.50" NPT Nipple
• Wires: 16", 600V Rated
• Approvals: UL Listed, UL916, UL864, C-UL, California State Fire Marshal, CE, RoHS
• Housing Rating: Accepted for Use in Plenum, NEMA 1
• Gold Flash: No
• Override Switch: No

• 20 Amp Resistive @ 300 Vac, 28 Vdc
• 20 Amp Ballast @ 277-480 Vac (Not rated for Electronic Ballast)
• 15 Amp Resistive @ 600 Vac
• 770 VA Pilot Duty @ 120 Vac, 1 Phase
• 1,158 VA @ 240 Vac, 1 Phase
• 1,110 VA @ 277 Vac, 1 Phase
• 1,640 VA @ 480 Vac, 1 Phase
• 1,466 VA @ 240 Vac, 3 Phase
• 2,112 VA @ 480 Vac, 3 Phase
• Heavy Pilot Duty @ 600 Vac
• 7.5 HP @ 480 Vac, 3 Phase
• 5 HP @ 240 Vac, 3 Phase
• 3 HP @ 480–600 Vac, 1 Phase
• 2 HP @ 240–277 Vac, 1 Phase
• 1 HP @ 120 Vac, 1 Phase

Coil Current: 154 mA @ 120 Vac

Coil Voltage Input: 120 Vac; 50-60 Hz (Drop Out = 35 Vac, Pull In = 85 Vac)

• What does the “-NC” mean in RIB013P-NC?
  “NC” stands for “normally closed.” The relay contacts are closed when the coil is not powered, making it suitable for fail-safe or de-energized-open applications.
• Is this relay functionally different from the RIB013P?
  Yes. While the specs and coil voltage are the same, the contact behavior differs. RIB013P-NC has normally closed contacts; RIB013P has normally open contacts.
• Can this relay switch inductive loads?
  The relay is rated for motor and ballast loads based on the contact ratings. However, it is not suitable for electronic ballasts or LED drivers.

• Tip: Confirm your design requires normally closed contacts before ordering. These are used when circuits should remain closed during loss of power.
• Tip: Use wire markers or labeling to clearly indicate N/C function during install and servicing.
• Mistake to Avoid: Do not confuse this model with standard N/O relays if your circuit relies on fail-safe operation.
• Mistake to Avoid: Not for use with LED or electronic ballast loads — choose a rated model for those applications.

"We use the RIB013P-NC for safety circuits that need to stay closed when power is lost. Works exactly as expected and holds up over time."
- Evan L., Controls Technician, Nashville, TN