Honeywell 135-103LAF-J01 Temperature Sensor Details
The Honeywell 135-103LAF-J01 temperature sensor is a discrete NTC thermistor developed for dependable temperature sensing across a wide operating range. As part of the Honeywell 135 Series, it is designed for engineers who need a compact through-hole component with stable behavior, straightforward integration, and strong environmental durability.
What Is the Honeywell 135-103LAF-J01?
The Honeywell 135-103LAF-J01 NTC thermistor is a 10 kOhm sensor in a DO-35 axial package. It is commonly evaluated for industrial electronics, control boards, HVAC systems, instrumentation, and embedded thermal monitoring. Because it uses a negative temperature coefficient, the sensor resistance drops as temperature increases, allowing accurate thermal feedback in analog and digital control circuits.
Technical Highlights
This Honeywell 135-103LAF-J01 temperature sensor is specified with 10 kOhm resistance at 25°C, ±5% resistance tolerance, and a B25/85 value of 3974K. It operates from -60°C to 300°C and uses through-hole mounting with a DO-204AH / DO-35 axial package. These characteristics make it suitable for designs that need broad thermal coverage and predictable electrical response.
The combination of compact dimensions and high-temperature capability gives this Honeywell temperature sensor a useful position in many long-life industrial designs. In systems where reliability is more important than miniaturized consumer packaging, axial NTC thermistors remain highly relevant.
Where the Honeywell 135-103LAF-J01 Fits Best
This part can be used in temperature compensation networks, over-temperature protection circuits, thermal monitoring boards, HVAC controllers, and industrial sensing modules. Designers often choose the Honeywell 135-103LAF-J01 thermistor when they want a simple but robust sensing element that can be incorporated directly into the board layout.
Its glass-encapsulated design also supports stronger resistance to moisture and contamination, which is valuable in real operating environments rather than ideal lab-only conditions.
For more information about Honeywell sensor technologies, it helps to compare this part with other Honeywell thermistors in the same series.
Frequently Asked Questions
What does the 3974K B25/85 value mean for the Honeywell 135-103LAF-J01?
The B25/85 value describes the thermistor’s material constant between 25°C and 85°C. It is an important parameter for calculating resistance change across temperature and helps engineers model sensor behavior in a circuit.
Is the Honeywell 135-103LAF-J01 suitable for industrial electronics?
Yes. Its wide operating range, glass-encapsulated structure, and through-hole axial design make it a strong candidate for industrial controls, monitoring boards, and rugged temperature sensing assemblies.
Why is ±5% tolerance important?
Resistance tolerance affects how closely the actual part matches its nominal 10 kOhm value at 25°C. A ±5% rating is often a practical middle ground between general-purpose flexibility and improved consistency.
Can this Honeywell temperature sensor be used in HVAC systems?
Yes. NTC thermistors like this are often considered for HVAC control, air handling equipment, and thermal monitoring functions where reliable temperature feedback is required.
What kind of mounting does this part use?
The Honeywell 135-103LAF-J01 uses through-hole mounting with axial leads. This is especially useful in conventional PCB layouts and applications where mechanical stability matters.