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Immersion Snap-Action Bimetallic Temperature Switches

Bi-Metal Immersion Temperature Switches


Item# TSW-TT-F3A-120R/WL

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 $38.08
5-9 $36.18
10-24 $35.41
25-49 $33.89
50-99 $33.13
100+ $32.37

In stock

Lead Time ( If not in Stock): 6 weeks

Bi-Metal Immersion Temperature Switches TSW-TT-F3A-120R/WL TSW-TT-F3A-120R/WL
  • Low Voltage/Low Current Applications
  • 1/4 NPT Mounting Threads
  • Factory Preset Temperature
  • Direct Action Contacts/Minimum Hysteresis
  • Gold Diffused, Fine Silver Contacts
  • Economical and Compact
  • NEMA 4, 13
  • Compact and Economical

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Switch Type
Switch Operation
Probe Length
Probe Diameter
Sensor Material
Maximum Temperature
Additional Features

Product Specs

OMEGA’s TSW-TT Series bi-metal immersion temperature switches are perfect for applications that require an economical solution to simple temperature control. All switches activate with a rise in temperature. The TSW-TT Series offer a wide range of temperature pre-set values to select from.

Set Point Range: 4 to 149°C (40 to 300°F)
Set Point Tolerance: ±2.8°C (5°F)
Maximum Temperature: 163°C (325°F)
Current Rating: 3 A @ 240 Vac, 2 A @ 24 Vdc (resistive)
Probe Length: 25.4 mm (1")
Media Connection: ¼ NPT male
Electrical Connection: 152.4 mm (6") wire leads
Circuit Form: SPST-NO or SPST-NC
Maximum External Pressure: 5000 psi

Rated 4 out of 5 by from Leads are way too short. Good unit for the price, but the leads are way to short to be usable without splicing.
Date published: 2016-07-29
Rated 5 out of 5 by from Review of Omega stock Found this company on the internet. So happy to find the item in stock and didn't have weeks of wait time. Just what we needed.
Date published: 2016-04-04
Rated 3 out of 5 by from almost perfect works great. needs threaded end on wire side for conduit
Date published: 2020-09-14
Rated 4 out of 5 by from Temperature sensor Works as expected. A bit disappointed that it came with individual conductors as flying leads as opposed to a cable with jacket as pictured. Reviewing the description in detail it is indeed stated it comes with conductors. I suggest updating the picture.
Date published: 2020-04-27
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what is the minimum ambient temperature

Asked by: Austni
Thank you for your inquiry. 325°F.
Answered by: Engineer CB
Date published: 2020-06-27

can I use this switch to make a relay with a 115v coil

Asked by: George D
Hi George, The switch can be used for small loads such as relay coil. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2021-01-05

Is this switch UL353 approved?

Asked by: electro
Thank you for your inquiry. This product does not carry any UL Approvals.
Answered by: Application Engineer JB
Date published: 2021-10-21

If contact opens at 230 Degrees F, what temperature closes circuit again? Also is this compatible with 120v (AC)? Thank you.

Asked by: Al1510
Thank you for your inquiry Al1510. The relay contact would close when the temperature drops below 230 F and yes this is compatible with 120 VAC.
Answered by: Application Engineer SP
Date published: 2021-12-29

Is the brass construction of this switch compatible with PAO or PAE compressor oils. Thank You.

Asked by: Compressor Jock
The immersed portion of the switch is made of Brass and Omega does not have any information on being compatible with PAO or PAE oil.
Answered by: Applications Engineer AB
Date published: 2020-09-25

Does this Temperature switch close at the same temperature that it opens?

Asked by: DLA1
Thank you for connecting with Omega. This switch will not open and close at the same temperature setpoint. The typical differential for this switch is between 8-16 deg C.
Answered by: RD Engineer
Date published: 2021-12-31
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