Part Number: TCMT4100

Manufacturer: Vishay Semiconductor Opto Division

Description: OPTOISO 3.75KV 4CH TRANS 16-SOP

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of TCMT4100

Datasheet  TCMT4100 datasheet
Category Isolators
Family Optoisolators – Transistor, Photovoltaic Output
Manufacturer Vishay Semiconductor Opto Division
Packaging Tape & Reel (TR)
Part Status Active
Number of Channels 4
Voltage – Isolation 3750Vrms
Current Transfer Ratio (Min) 50% @ 5mA
Current Transfer Ratio (Max) 600% @ 5mA
Turn On / Turn Off Time (Typ) 6μs, 5μs
Rise / Fall Time (Typ) 3μs, 4.7μs
Input Type DC
Output Type Transistor
Voltage – Output (Max) 70V
Current – Output / Channel 50mA
Voltage – Forward (Vf) (Typ) 1.25V
Current – DC Forward (If) (Max) 60mA
Vce Saturation (Max) 300mV
Operating Temperature -40°C ~ 100°C
Mounting Type Surface Mount
Package / Case 16-SOIC (0.173″, 4.40mm Width)
Supplier Device Package 16-SOP


Temperature sensing is an important part of many industries, such as food processing, manufacturing, and medical applications.Accurately measuring temperature is very important for safety, quality control, and getting the best results.The TCMT4100 has grown to be a well-liked option in recent years for high-precision temperature sensing. This article will talk in depth about the TCMT4100, including its features, requirements, and possible uses.We will also go over how it differs from other temperature sensors and offer tips on how to utilize it well.

What is TCMT4100?

The high-precision temperature sensor TCMT4100 can accurately measure temperatures because it has a thermocouple amplifier built right in.It is a thermocouple-to-digital converter that transforms a thermocouple’s voltage signal into a digital temperature measurement.

One of the best things about the TCMT4100 over other temperature sensors is how precise it is.It can function in temperatures ranging from -40°C to +125°C and has an accuracy of 1°C over a large temperature range. Furthermore, it has strong linearity throughout the whole temperature range, making it a superb option for applications where accuracy is crucial.

Moreover, the TCMT4100 has a low power requirement, which makes it perfect for battery-powered applications. It can function with a power source voltage ranging from 3V to 5.5V and typically uses 120A of current.

The TCMT4100’s compact design and user-friendly interface are further benefits. It connects to a microcontroller using a common I2C interface and has a small 3x3mm DFN package. It may be utilized in a variety of applications, including industrial process control, medical devices, and consumer electronics, and is easy to integrate into current designs because of this.

Technically speaking, the temperature resolution of the TCMT4100 is 0.0625°C, and its measuring range is -200°C to +1372°C. Additionally, it has a cold-junction correction mechanism that makes it possible to monitor temperatures accurately even in situations where the ambient temperature is unknown.

Overall, the TCMT4100 is a temperature sensor that is superior to other temperature sensors due to its excellent accuracy, low power consumption, and simplicity of use. For a variety of applications, its small size, good linearity, and low power consumption make it the best option.


  • Low profile package (half pitch)
  • AC isolation test voltage 3750 VRMS
  • Low coupling capacitance of typical 0.3 pF
  • Current transfer ratio (CTR) selected into groups
  • Low temperature coefficient of CTR
  • Wide ambient temperature range

How Does It Work?

To monitor temperature, the TCMT4100 employs a technique known as resistance temperature detection (RTD). RTD makes use of the fact that a material’s electrical resistance varies with temperature. The resistance element in the TCMT4100 is made of platinum, which has a well-established and consistent relationship between temperature and resistance.

An analog signal processing circuit and a thin-film platinum RTD make up the TCMT4100. A ceramic substrate is used to support the RTD, a tiny thin-film resistor. The resistance of the platinum element varies with temperature. The signal processing circuit transforms this change in resistance into a voltage signal for output.

The RTD’s resistance is measured by the Wheatstone bridge design of the signal processing circuit.Four resistors total—including the RTD—are used in this setup. The Wheatstone bridge becomes unbalanced as a result of the RTD’s resistance changing with temperature, and an output voltage proportionate to the temperature change results. A microcontroller or other device can read the output signal after it has been amplified and adjusted to provide a high-precision, low-noise signal.

Together, the TCMT4100’s RTD and signal processing circuit turn changes in temperature into a voltage signal that can be measured.


Because of its great accuracy, dependability, and affordability, the TCMT4100 is utilized extensively across a variety of sectors. These are some of the sectors where TCMT4100 is frequently employed, along with illustrations of how each application makes use of it:

  • Automotive: The TCMT4100 is used in automotive applications to track the temperature of different parts like engines, gearboxes, and braking systems.The temperature of the battery pack is also seen in electric vehicles. The TCMT4100 is a great option for automotive applications because of its excellent accuracy and quick response time.
  • In medical settings, the TCMT4100 is used to measure the temperature of bodily fluids like blood and urine.It is used in a number of medical devices, such as incubators and blood analyzers.Medical applications can benefit from the TCMT4100’s tiny size and great precision.
  • Industrial: The TCMT4100 is used in industrial settings to keep track of the temperature of things like soldering, welding, and annealing.HVAC systems also keep tabs on the temperature of the water and air.The high precision and ruggedness of the TCMT4100 make it a dependable option for industrial applications.

The TCMT4100 has benefits for each application when used:

Automotive: The great accuracy and quick response time of the TCMT4100 make it a dependable option for monitoring the temperature of automobile components. Automobile makers find it to be a desirable option due to its small size and low price.

  • Medical: Because it is accurate and small, the TCMT4100 is a good choice for medical applications with limited space.In comparison to other temperature sensors, it is also a more affordable choice.
  • Industrial: Because of its great precision and durability, the TCMT4100 is a reliable option for monitoring the temperature of different industrial operations. It is suitable for harsh situations due to its large operating temperature range. The cost-effectiveness of the TCMT4100 for industrial applications is further enhanced by its small size and low power consumption.

TCMT4100 compared to Other Temperature Sensors

People often compare the TCMT4100 to other well-known temperature sensors, such as thermocouples, resistance temperature detectors (RTDs), and thermistors.

The TCMT4100 has a broader temperature range, higher accuracy, and faster response times than thermocouples. Moreover, TCMT4100 sensors are easier to use than thermocouples because they don’t need as much signal processing.

The TCMT4100 is better than RTDs and thermistors in terms of resolution, linearity, and long-term drift.Most RTDs and thermistors have a smaller temperature range than TCMT4100 sensors, and they are more sensitive to electrical noise.

The problem with the TCMT4100 sensors is that they need a precise and reliable current source to work.Aside from that, they cost more than some other temperature sensors, such as thermistors.

In terms of accuracy, reaction time, linearity, and stability, the TCMT4100 has a number of benefits over conventional temperature sensors. They could cost more and need a reliable current source, but their excellent performance makes them perfect for many applications.


The TCMT4100 stands out as a high-precision temperature sensor that has been well-liked across numerous industries for its precision, dependability, and effectiveness. Compared to other temperature sensors, it has a wider range of temperatures, is more accurate, and uses less power.With the use of TCMT4100 in automotive, medical, and industrial applications, performance, safety, and cost-effectiveness have all gone up.The TCMT4100 is a useful tool for engineers and researchers in industries that move quickly and need to measure temperatures with high accuracy.Due to its high-tech features, it is the best choice for sensing temperature in tough situations.Overall, the TCMT4100 is a great choice for engineers and scientists who want accurate and reliable temperature measurements.

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