Honeywell 135-103FAG-J01 Temperature Sensor Guide
The Honeywell 135-103FAG-J01 temperature sensor is a compact NTC thermistor designed for reliable temperature measurement in demanding environments. As part of the Honeywell 135 Series, this component combines a glass-encapsulated construction with axial leads and through-hole mounting, making it a practical choice for engineers who need stable thermal response and durable long-term performance.
What Is the Honeywell 135-103FAG-J01?
The Honeywell 135-103FAG-J01 NTC thermistor is a 10 kOhm temperature sensing component built in a DO-35 style axial package. It is widely considered for applications where repeatable temperature monitoring matters, especially in control boards, industrial electronics, HVAC assemblies, laboratory equipment, and measurement circuits. Because it uses NTC technology, its resistance decreases as temperature rises, which makes it suitable for precise sensing and compensation functions.
Key Technical Features
This Honeywell 135-103FAG-J01 temperature sensor offers 10 kOhm resistance at 25°C, a ±10% resistance tolerance, and a B25/85 value of 3468K. It supports an extended operating temperature range from -60°C to 300°C, which is especially useful in systems exposed to both low ambient and elevated process temperatures. Its hermetically sealed glass body helps protect the sensing element from moisture and contamination, improving durability in real operating conditions.
Why Engineers Use This Honeywell Temperature Sensor
One of the main reasons the Honeywell 135-103FAG-J01 thermistor is chosen is consistency. The axial lead design supports straightforward PCB integration, while the compact form factor fits space-sensitive assemblies. In many temperature monitoring circuits, a rugged thermistor is preferred over larger sensing devices because it reacts quickly and integrates easily into established designs.
The part is also relevant when thermal feedback is needed in industrial controllers, battery management interfaces, heating systems, and instrumentation. In applications that require dependable temperature tracking rather than marketing-driven features, this type of sensor remains a practical engineering solution.
For more information about Honeywell temperature sensing solutions, it is useful to review the broader product family and compatible integration options.
Frequently Asked Questions
Is the Honeywell 135-103FAG-J01 a thermistor or a standard temperature probe?
It is an NTC thermistor. That means it is a resistive temperature sensor whose resistance changes predictably with temperature. It is not a complete probe assembly with housing and cable, but a discrete sensing component for circuit-level integration.
What does 10 kOhm at 25°C mean?
It means the sensor has a nominal resistance of 10,000 ohms when the ambient temperature is 25°C. This reference point is commonly used by engineers to compare thermistors and design input networks for temperature measurement circuits.
Where is the Honeywell 135-103FAG-J01 commonly used?
Typical use cases include industrial electronics, HVAC control boards, thermal compensation networks, power supply monitoring, process equipment, and embedded sensing designs where a compact through-hole temperature sensor is required.
Why does glass encapsulation matter?
Glass encapsulation improves environmental protection. It helps the sensor resist moisture, contamination, and mechanical stress better than many less protected components, which can support more stable behavior over time.
Is this Honeywell temperature sensor suitable for high-temperature environments?
Yes. One of its strongest advantages is the wide operating range up to 300°C. That makes it more flexible than many general-purpose temperature sensing components used only in low or moderate temperature conditions.