Please verify: contacts are 20amp, 120v and 'coil' voltage can be anything from 24vac/dc to 120vac?

Yes to both questions. Enclosed Power Relay 20Amp SPDT. Coil voltage input is 24VAC/DC ; 120VAC ; 50-60 Hz

Can a 24 volt thermostat connection be used with this to turn on a 120 volt circulator pump?

I am using the unit to power a duct booster fan, (120 V-1/4hp)from my 24v out put terminal on my HVAC circuitboard powering the relay, so you should be OK.

What are the detentions of this relay?

did you mean the dimensions if so its 60mmx82mmx47mm tall

I have two food warmers 120v @ 12amp that can not be on at the same time. Can I use this to allow only one warmer at a time?

The connection is a single switch (SPDT, means Single pole double throw, and that means on or off) If you connect one warmer it will turn on only that one. If you connect both to the relay it will overload it...it's a 20 amp device and 12 + 12 is 24, overload. If you want to get creative you can connect a manual switch that connects to one warmer or the other then connect this relay to that device. Then, depending on which way the manual switch is, that warmer will be controlled, move the manual switch the other way and it will operate the other warmer.

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Functional Devices RIB2401B Power Relay, 20 Amp SPDT, 24 Vac/dc/120 Vac Coil, NEMA 1 Housing

Product ID: 44372060

Details

Connector Type
Screw
Contact Material
Silver
Contact Type
Normally Open
Current Rating
20 Amps
Mounting Type
Screw Mount

⚡20 Amp heavy-duty current

🏠NEMA 1 indoor-rated housing

🔄SPDT versatile switching

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€ 66.71

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Connector Type
Screw
Contact Material
Silver
Contact Type
Normally Open

Description

⚡ Elevate your electrical setup with the relay that means business!

BUILT TO LAST - Durable NEMA 1 housing designed for reliable indoor use.
SMART HOME READY - Perfect for integrating with Alexa/Echo for advanced automation.
PRECISION ENGINEERING - Silver contacts ensure low resistance and long-lasting operation.
POWERHOUSE PERFORMANCE - Handles up to 20 Amps for robust electrical control.
DUAL VOLTAGE FLEXIBILITY - Operates seamlessly on 24 VAC/DC or 120 VAC coil voltages.

The Functional Devices RIB2401B is a high-performance 20 Amp SPDT power relay featuring dual coil voltage compatibility (24 VAC/DC and 120 VAC). Housed in a durable NEMA 1 enclosure, it’s engineered for reliable indoor applications including smart home automation and critical solar inverter setups. With silver contacts and screw mounting, it offers precision switching and easy installation, making it a top choice for professionals demanding dependable electrical control.

Specifications

ASIN	B000LEUJU6
Best Sellers Rank	#29,035 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #12 in Electromechanical Relays
Brand	RIB
Brand Name	RIB
Coil Resistance	2.78 Ohms
Coil Voltage	120 Volts
Connector Type	Screw
Contact Current Rating	20 Amps
Contact Material	Silver
Contact Type	Normally Open
Current Rating	20 Amps
Customer Reviews	4.6 out of 5 stars 462 Reviews
Included Components	Accessories
Item Weight	0.49 Pounds
Manufacturer	Functional Devices, Inc
Maximum Switching Current	20 Amps
Minimum Switching Voltage	120 Volts (AC)
Model	RIB2401B
Mounting Type	Screw Mount
Number of Terminals	3
Operation Mode	Manual
Part Number	RIB2401B
UPC	643129353819
Unit Count	1.0 Count
Upper Temperature Rating	60 Degrees Celsius
Warranty Description	No Warranty
Wattage	900 watts

Reviews

B**U

7.02.2026

D**O

19.10.2025

D**K

1.09.2017

Z**K

5.12.2024

M**R

9.12.2025

S**N

10.04.2026

C**S

16.09.2023

M**H

14.06.2025

K**.

3.12.2024

D**K

12.06.2020

A**R

11.11.2019

P**.

9.09.2019

L**E

12.08.2019

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