can I use this on a Motor home 12 volt vent fan on the back of the refrigerator?

NO! The thermoswitch is designed for 115 volt AC. The 12 Volt circuit you are asking about is 12 Volt DC. It will take the voltage and blow like a fuse will do in less than 30 seconds.

I'm using this in 12v system. Should the switch be wired to the positive wire or to the ground wire?

the positive wire should go to one side of the switch. Come off the other side of the switch to the positive side of the component you want to control.The ground(negative) will be straight to the negative side of the component you want to control

When this Switch Fails.... Does it stay open (off) or closed (on)?

Mine works fine. That is a 50/50 question, if the contacts fried when loaded I guess it would stay on. Then again it could fail to come on for load. Rated for 100,000 plus cycles at rated amps.

I want to use this to control a fan where the plug is a transformer from 120v to 5v. Should I install the switch between fan and plug or plug and wall

if you wire the switch between the power source (wall)to the transformer it will control power to the transformer and anything that the transformer is sending power to . if you wire it between the transformer and the fan it will shut down the fan but the transformer will stay powered up as long as the transformer is plugged into the wall power source. I would use it on the 110 side to shut down the transformer.

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Snap Disc Thermostat Switch - Circuit On at 100°F and Off at 85°F - Large Flange, Part Number 2511F002-351

Snap Disc Thermostat Switch - Circuit On at 100°F and Off at 85°F - Large Flange, Part Number 2511F002-351

Product ID: 4822080

Details

Brand
Senasys
Connector Type
Flange
Contact Type
Normally Open
Current Rating
25 A
Item dimensions L x W x H
4 x 2.8 x 2
Material
Metal

⚡25 AMP resistive load

🔥Operates up to 350°F

⏱️100,000+ reliable cycles

5231 kr

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Description

🔥 Stay cool, stay in control — the thermostat switch that never quits! ⚡

BUILT TO LAST - Endures over 100,000 operations, delivering unmatched durability for your critical systems.
UL CERTIFIED SAFETY - Tested and approved for up to 250 VAC ensuring trusted, high-voltage performance.
PRECISION THERMAL CONTROL - Automatically switches ON at 100°F and OFF at 85°F for flawless temperature regulation.
HEAVY DUTY CURRENT HANDLING - Supports a robust 25 AMP resistive load, perfect for demanding electrical applications.
VERSATILE MOUNTING COMPATIBILITY - Large flange design with snap-in mount fits seamlessly into diverse setups.

The Senasys 2511F002-351 Snap Disc Thermostat Switch is a UL-approved, high-performance temperature switch designed for precision control in demanding electrical environments. Operating reliably between 85°F and 100°F, it supports up to 25 AMP resistive loads at 250 VAC and withstands temperatures up to 350°F. Engineered for longevity with over 100,000 cycles, its large flange snap-in mount ensures easy integration, making it the go-to choice for professionals who demand safety, durability, and precision.

Specifications

ASIN	B0026RYU4W
Actuator Type	Temperature Switch
Best Sellers Rank	#542,047 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #417 in Home Thermostat Accessories
Brand Name	Senasys
Circuit Type	1-way
Color	Silver
Connectivity Protocol	X-10
Connector Type	Flange
Contact Material	Metal
Contact Type	Normally Open
Control Method	App
Current Rating	25 A
Customer Reviews	4.5 4.5 out of 5 stars (366)
Item Dimensions	4 x 2.8 x 2 inches
Lower Temperature Rating	85 °F
Manufacturer	Senasys, Inc.
Material Type	Metal
Model	2511F002-351
Mounting Type	Snap In Mount
Number of Items	1
Number of Positions	2
Operating Voltage	250 volts_of_alternating_current
Operation Mode	automatic
Part Number	2511F002-351
Specification Met	UL
Switch Type	Temperature Switch
Terminal	Blade
UPC	705105626512 744960730859
Unit Count	1 Count
Upper Temperature Rating	350 °F
Wattage	6250 watts

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5231 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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