Honeywell 173-103LAF-301 NTC Thermistor Overview
The Honeywell 173-103LAF-301 thermistor is a surface-mount NTC temperature sensor designed for compact electronic assemblies that need dependable thermal response. As a 10k 0805 thermistor, this device belongs to Honeywell’s 173 Series and is well suited to PCB-based temperature measurement, compensation, and control tasks where board space is limited but stable performance still matters.
What Is the Honeywell 173-103LAF-301?
The Honeywell 173-103LAF-301 NTC thermistor is a 10 kOhm thermistor in an 0805 surface-mount package. Public distributor data identifies it as an NTC thermistor with ±5% resistance tolerance at 25°C, and Honeywell’s 173 Series documentation places it in a family of compact end-banded thermistors intended for automated placement on rigid or flexible printed circuit boards.
Because it is an NTC thermistor, resistance decreases as temperature rises. That behavior makes the Honeywell 173-103LAF-301 temperature sensor useful for thermal sensing, circuit protection strategies, compensation networks, and electronics that need a reliable temperature-dependent resistance curve.
Key Technical Characteristics
- Product type: Honeywell NTC thermistor
- Part number: 173-103LAF-301
- Nominal resistance: 10 kOhm at 25°C
- Tolerance: ±5%
- Package: 0805 (2012 Metric)
- Mounting style: Surface mount
- Operating temperature range: -60°C to 125°C
Within the broader 173 Series, Honeywell also highlights features such as suitability for automated assembly, glass-coated ceramic construction for long-term reliability, solder-plated nickel barrier terminations, and design compatibility with high-density boards. Those details help explain why the Honeywell 173-103LAF-301 thermistor remains relevant in compact electronics design.
Where This Honeywell Thermistor Fits Best
The Honeywell 173-103LAF-301 NTC thermistor is a practical choice for applications where temperature must be monitored directly on the board rather than through a larger probe assembly. Common use cases include consumer electronics, control boards, instrumentation, battery-related thermal monitoring, industrial electronics, and compensation circuits that rely on a predictable thermistor response.
An 0805 NTC thermistor like this one is especially helpful when engineers want a compact footprint without giving up access to established thermistor behavior. In design terms, it supports miniaturization while still offering the electrical characteristics needed for sensing and compensation.
Why Engineers Still Use 10k NTC Thermistors
The popularity of the 10k NTC thermistor format comes from familiarity, model availability, and broad circuit compatibility. Many analog front ends, temperature lookup tables, and controller designs are already optimized around 10k sensor values, which simplifies design work and replacement planning. The Honeywell 173-103LAF-301 thermistor fits naturally into that ecosystem.
For teams building dense electronics, it also helps that the 173 Series is designed for automated assembly. For more information about Honeywell, it is useful to compare sensor package size, operating range, and tolerance against the thermal behavior your circuit actually needs.
FAQ
What is the Honeywell 173-103LAF-301?
The Honeywell 173-103LAF-301 is an NTC thermistor used as a compact temperature sensor in electronic circuits. It has a nominal resistance of 10 kOhm at 25°C and comes in an 0805 surface-mount package.
What does NTC mean in this Honeywell thermistor?
NTC stands for Negative Temperature Coefficient. That means the resistance of the thermistor falls as temperature rises. This property makes it useful for sensing, thermal compensation, and temperature-related control functions.
Where is the Honeywell 173-103LAF-301 commonly used?
This type of Honeywell temperature sensor is commonly used on printed circuit boards in compact electronics, industrial controls, battery systems, instrumentation, and any design that requires localized board temperature awareness.
Why is the 0805 package important?
The 0805 package is small enough for dense PCB layouts yet widely supported in automated manufacturing. That balance makes the Honeywell 173-103LAF-301 thermistor suitable for scalable production and modern compact board design.
Is the Honeywell 173-103LAF-301 still relevant for new designs?
It remains relevant as a reference point for engineers working with standard 10k NTC thermistor behavior and compact SMD layouts. However, designers should always verify lifecycle status, sourcing conditions, and exact curve requirements before locking a part into a new design.