This Product Selection Guide contains information to help select products in the Thermostats - Solid State category on DigiKey.com
Solid state thermostat products are semiconductor-based temperature detection devices that produce a two-state output, the state of which changes in response to the measured temperature exceeding a fixed limit or falling outside a defined window. Devices with pre-set threshold temperatures as well as programmable/configurable thresholds are available.
SelectionCharacteristics
Trip Temperature Threshold: Indicates if a device output is active when sensed temperature is below a setpoint (“cold”) or above a setpoint (“hot”).
Switching Temperature: The nominal temperature at which a device’s output changes state. Actual temperature switch points are subject to manufacturing tolerances and hysteresis effects.
Accuracy: Manufacturer’s specified measurement error limits across a specified temperature range.
Current - Output (Max): The maximum amount of current that can be output by the device.
Output Type: Describes the method of how the device provides the output.
Output: Describes the relative direction the output values move when the device activates.
Output Function: Indicates what a device’s output signals are intended to represent, and the logic sense (active low vs. active high) of these signals.
Selectable Hysteresis: Indicates if a device’s hysteresis level (amount that temperature must travel past the device set point to cause a change in output) is user configurable.
Features: These are different capabilities or properties of the device such as programmable or shutdown mode.
Voltage - Supply: Typically represented by a range, this indicates the low and high voltage limits which one can expect standard operation. Voltages outside this range may damage the device and other system components.
Current - Supply: This represents the maximum current to which a device will meet its given specifications. Exceeding this current may damage the device and/or other system components.
Operating Temperature: Recommended operating temperature, typically given in a range or as a maximum. Exceeding these temperatures may affect performance or damage the device and other system components.
Mounting Type: Indicates how the device is attached.
Package / Case: Indicates the type of protective case used on an electronic component to allow easy handling, installation, and protection. This selection was determined to be the closest industry standard applicable to the supplier device packaging. Typically it is best to check the actual dimensions from the datasheet rather than depend on this terminology when designing your circuit.
Supplier Device Package: This is what the manufacturer calls the package of this device. They are manufacturer specific. It is typically best to use the actual dimensions from the datasheets rather than to go by this terminology when designing your circuit.
ProductExamples
| MFR PART # | MCP9509HT-E/OT |
|---|---|
| DIGI-KEY PART # | MCP9509HT-E/OTTR-ND - Tape & Reel (TR) |
| MANUFACTURER | Microchip Technology |
| DESCRIPTION | Thermostat Programmable Active Low Open Drain SOT-23-5 |
| DATASHEET | Click Here |
| MFR PART # | MAX6510HAUT+T |
|---|---|
| DIGI-KEY PART # | MAX6510HAUT+TTR-ND - Tape & Reel (TR) |
| MANUFACTURER | Analog Devices Inc./Maxim Integrated |
| DESCRIPTION | Thermostat Programmable Active High, Active Low Open Drain SOT-6 |
| DATASHEET | Click Here |
| MFR PART # | LM26CIM5-TPA/NOPB |
|---|---|
| DIGI-KEY PART # | LM26CIM5-TPA/NOPBTR-ND - Tape & Reel (TR) |
| MANUFACTURER | Texas Instruments |
| DESCRIPTION | Thermostat 85°C Active Low Open Drain SOT-23-5 |
| DATASHEET | Click Here |