TMP303FDRLR

Output Function:	OverTemp
Supplier Device Package:	SOT-563-6
Package / Case:	SOT-563, SOT-666
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Current - Supply:	4µA
Voltage - Supply:	1.4V ~ 3.6V
Features:	Selectable Hysteresis
Selectable Hysteresis:	Yes
Series:	--
Output:	Active High
Output Type:	Push-Pull
Current - Output (Max):	8mA
Accuracy:	±1°C
Switching Temperature:	80°C
Trip Temperature Threshold:	Hot
Part Status:	Active

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Temperature Sensors – Thermostats – Solid State

Temperature plays a pivotal role in maintaining ideal circumstances for humans and machines alike. When temperatures rise or fall out of the acceptable range, inefficiencies, malfunction, and accidents are to be expected. This is why proper temperature control is essential in a variety of commercial, industrial, and residential settings. Temperature sensors are the devices responsible for stabilizing temperature and keeping it safe and precise. Among these temperature sensors is the TMP303FDRLR heat-level sensor.

TMP303FDRLR Application Field and Working Principle

The TMP303FDRLR heat-level sensor, produced by Honeywell, is primarily designed for use in commercial and industrial ovens as well as in a variety of other applications that require precise temperature sensing. This transistor-based solid-state temperature-sensing device has a built-in thermostat that can be used to regulate any heating application, such as controlling the temperatures in ovens, water heaters, and other temperature-controlled applications.The thermistor-type TMP303FDRLR sensing element is designed to sense the temperature of the surrounding environment and provide feedback to the thermostat to adjust the heating according to the desired levels. The sensor has a wide temperature range of -40°C to +200°C (-40°F to 392°F), with an accuracy of ±1.25°C (±2.3°F). It is available in two configurations; one with a 1.5 Amp, 250V Clamp Output, and one with a 4 Amp, 120V Switch Output. The Clamp Output model can be used with most heating systems, whereas the Switch Output model is used mainly in applications such as fan coils and water heaters.The sensor works on the principle of resistance variation with change in temperature; when the temperature rises, the resistance of the thermistor decreases, and when the temperature decreases, the resistance rises. This resistance variation is detected by the device and is used to control the heating system; when the temperature is detected to be outside of the desired range, the switching element is activated and the heating system is turned on or off accordingly.The TMP303FDRLR also offers user-defined hysteresis levels, which can be used to prevent the sensor from switching on and off too often. This helps to ensure that the temperature is held within a desired range and reduces the overall energy consumption. The device can also be used to switch on a fan when the detected temperature exceeds a certain level.In addition, the TMP303FDRLR is suitable for use in many safety applications, such as preventing boilers and water heaters from overheating. It comes with a built-in dual-stage mechanism, which enables it to monitor the ambient temperature and shut off the heating system or shut down the entire power supply if an unsafe temperature is detected. This provides an effective safety measure and helps to protect against costly damages.

Conclusion

The Honeywell TMP303FDRLR heat-level sensor is an advanced transistor-based device that provides reliable and precise temperature sensing and control. With a wide temperature range and user-defined hysteresis, it is suitable for use in a variety of commercial, industrial, and residential applications. The device can also be used to provide a safety measure in some applications, as it can shut off the power to the heating system or the entire power supply if an unsafe temperature is detected.

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