Setrab USA 1/8" NPT Cooling Fan and Oil Pump Temperature Switch

5.0·2 reviews

Switch Activation Temp

82°C (180°F)

88°C (190°F)

93°C (200°F)

£33.06

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Setrab USA 1/8" NPT Cooling Fan and Oil Pump Temperature Switch

The Setrab USA cooling fan and oil pump thermal switch provides automatic temperature-based control for compatible 12V cooling and lubrication systems. Designed for installation into a 1/8"-27 NPT female port, the normally open switch closes when fluid reaches its specified activation temperature and reopens as the temperature falls.

Why Choose the Setrab USA Thermal Switch?

Automatic Temperature Switching

The normally open contacts close when the selected activation temperature is reached and automatically reopen at the corresponding reset temperature.
Multiple Temperature Options

Choose the activation temperature that best suits your cooling or lubrication system. Exact switch-on and switch-off temperatures are shown in the available options.
1/8"-27 NPT Male Connection

The tapered male NPT thread installs into a compatible 1/8"-27 NPT female port using suitable PTFE tape or thread sealant.
12V Automotive Control

Suitable for temperature-based switching in compatible 12V automotive systems, including cooling fan, oil pump and warning circuits.
Relay Control for Higher Loads

The switch is rated up to 10A at 12V DC. Higher-current fans, pumps and other electrical devices should be controlled through a suitable automotive relay.
Standard Spade Terminal

An Amp #250 tab accepts a standard 6.3mm (1/4") female spade connector for straightforward electrical integration.

How Does a Thermal Switch Work?

A thermal switch changes electrical state when a preset temperature is reached. This switch is normally open, closing its electrical contacts as the temperature rises to the specified switch-on point and reopening as the temperature falls to the corresponding switch-off point.

Typical Applications

Suitable for temperature-based control in oil, coolant and transmission systems where a compatible 1/8"-27 NPT female port is available, including cooling fans, oil cooler fans, electric pumps, warning circuits and relay control systems.

Type: Thermal Switch Temperature-activated electrical switch
Contact Type: Normally Open (NO) Closes as temperature rises and automatically reopens as it falls
Application: 12V Automotive Systems For temperature-based control of compatible electrical circuits

Connection 1: NPT Male Tapered thread · Use suitable PTFE tape or thread sealant
Electrical Connection: Amp #250 Tab Compatible with standard 6.3mm (1/4") female spade connectors

Electrical Rating: 10A at 12V DC Higher-current devices should be controlled via a suitable relay
Circuit Resistance: 50mΩ Maximum
Insulation Resistance: 100MΩ Minimum Tested at 500V DC
Dielectric Strength: 1,250V AC for 1 minute Or 1,800V AC for 3 seconds
Operating Life: Up to 100,000 Cycles Depending on switching load and operating conditions
Approvals: UL, cUL, ENEC17, CQC & TÜV Tested to recognised international standards

Available Setrab USA temperature switch activation and reset temperatures
Product Code	Connection 1	Switches On	Switches Off
SUSA-TS-82	1/8"-27 NPT Male Tapered thread	82°C 180°F	74°C 165°F
SUSA-TS-88	1/8"-27 NPT Male Tapered thread	88°C 190°F	79°C 174°F
SUSA-TS-93	1/8"-27 NPT Male Tapered thread	93°C 200°F	85°C 185°F

Switching temperatures have a tolerance of ±2°C (±3.6°F).

Radiator Fans
Cooling Fans
Oil Cooler Fans
Electric Water Pumps
Warning Lamps
Relay Control

Free repair or replacement for two years from the date of purchase. Learn more

Frequently Asked Questions

What is the Setrab USA thermal switch used for?
The thermal switch provides automatic temperature-based electrical control in compatible 12V automotive systems. Typical uses include controlling cooling fan relays, oil pump relays and warning circuits.
How does the thermal switch operate?
The switch is normally open. Its contacts close when the selected switch-on temperature is reached and automatically reopen as the temperature falls to the corresponding switch-off temperature.
What activation temperatures are available?
Multiple activation temperatures are available. See the available options for the exact switch-on and corresponding switch-off temperatures.
What connection does the thermal switch use?
The switch uses a 1/8"-27 NPT male tapered thread for installation into a compatible female NPT port. Use suitable PTFE tape or thread sealant when installing it.
Can the switch be wired directly to a fan or pump?
The switch is rated up to 10A at 12V DC. Higher-current fans, pumps and other electrical devices should be controlled through a suitable automotive relay.
What electrical terminal does the switch use?
The switch uses an Amp #250 tab, compatible with a standard 6.3mm (1/4") female spade connector.
Can the switch be installed in a sensor port adapter?
Yes. It can be installed in a compatible adapter or other component with a 1/8"-27 NPT female port.