Honeywell 135-103LAG-J01 Temperature Sensor Guide
The Honeywell 135-103LAG-J01 temperature sensor is a rugged NTC thermistor intended for accurate and repeatable temperature sensing in electronic systems. Belonging to the Honeywell 135 Series, this part is designed for engineers who need a compact, glass-encapsulated sensing component that performs across a broad temperature range.
What Makes the Honeywell 135-103LAG-J01 Important?
The Honeywell 135-103LAG-J01 NTC thermistor offers a practical combination of high-temperature capability, through-hole installation, and a familiar axial package. It is a 10 kOhm component at 25°C and is frequently relevant in industrial electronics, HVAC control equipment, instrumentation, and thermal compensation networks.
Core Technical Specifications
This Honeywell 135-103LAG-J01 temperature sensor is specified with 10,000 ohm resistance, ±10% tolerance, and a B25/85 value of 3974K. It uses a DO-35 / DO-204AH axial package, supports through-hole mounting, and operates across a wide temperature range from -60°C to 300°C. The lead length and compact body format help it fit neatly into conventional board layouts.
For many engineering teams, the main advantage of this Honeywell temperature sensor is its combination of rugged construction and predictable thermistor behavior. The hermetically sealed glass structure supports better environmental protection than less robust alternatives, which can be especially useful in real-world field conditions.
Where the Honeywell 135-103LAG-J01 Is Used
The Honeywell 135-103LAG-J01 thermistor can be used in thermal protection circuits, industrial sensing modules, building automation controls, process monitoring electronics, and power management assemblies. Because it is a discrete component, it is especially suitable when the designer wants flexible circuit placement rather than a prebuilt probe form.
Its 3974K characteristic also makes it a relevant option in thermal modeling and compensation designs where engineers need a known resistance curve behavior within a well-established product family.
For more information about Honeywell temperature sensor options, comparing related parts in the same series can help identify the best tolerance and packaging match.
Frequently Asked Questions
What type of sensor is the Honeywell 135-103LAG-J01?
It is an NTC thermistor, which means it is a temperature-sensitive resistor whose resistance decreases as temperature rises. It is used for sensing and compensation in electronic circuits.
What does ±10% tolerance mean here?
It means the nominal resistance value at 25°C may vary within 10% of the stated 10 kOhm specification. This matters during circuit design and calibration, especially when comparing parts across different tolerance classes.
Why is the 3974K value important?
The 3974K B25/85 value helps define how the thermistor’s resistance changes with temperature. It is a useful design parameter for converting resistance readings into meaningful temperature data.
Can the Honeywell 135-103LAG-J01 be used in harsh environments?
It can be a strong candidate for demanding environments because the glass-encapsulated construction improves protection against moisture and contamination while supporting reliable long-term sensing performance.
Is this Honeywell temperature sensor appropriate for industrial control boards?
Yes. Its through-hole axial design, wide operating range, and established Honeywell 135 Series format make it relevant for industrial boards, HVAC electronics, instrumentation, and thermal monitoring systems.