Functional Devices RIB023P-NC: Enclosed Power Relay, 20 Amp Contact Rating, Relay Contact Type: 3PST-N/C, 208–277 Vac Coil Voltage, NEMA 1 Housing, Made in USA
Specifications
- 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: 187 mA @ 208–277 Vac
Coil Voltage Input: 208–277 Vac; 50–60 Hz (Drop Out = 60 Vac, Pull In = 160 Vac)
Frequently Asked Questions
- What does the “-NC” mean in RIB023P-NC?
“NC” indicates normally closed contacts, which means the circuit is closed when the relay coil is not energized. This configuration is useful in applications requiring a fail-safe or default-closed state. - How is this different from the standard RIB023P?
The RIB023P-NC is functionally the same in coil and contact ratings, but it uses a normally closed contact configuration instead of normally open. - Can it be used with high-voltage control panels?
Yes. With a 208–277 VAC coil and NEMA 1 housing, it’s designed for commercial panels and control systems using higher voltage inputs.
Installation Tips & Mistakes to Avoid
- Tip: Select the RIB023P-NC if your application requires relay contacts to remain closed during a power loss.
- Tip: Clearly label N/C wiring in the panel for future servicing and inspections.
- Mistake to Avoid: Do not substitute this in place of a standard N/O relay unless your control logic is designed for normally closed operation.
- Mistake to Avoid: This relay is not compatible with LED drivers or electronic ballast loads.
Customer Reviews
"The RIB023P-NC is our go-to for high-voltage fail-safe circuits. Works well in exhaust fan shutdown and override scenarios."
- Blake H., Automation Contractor, Denver, CO
Datasheets
![]() | Functional Devices RIB023P-NC Specifications |
- Mounting:
- Enclosed
- Number of Relays:
- 1
- Relay Contact Type:
- 3PST-N/C
- Relay Coil Voltage:
- 208-277 Vac
- Contact Ratings:
- 20 Amp