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Home > Products > Sensors, Transducers > Temperature Sensors > PTC Thermistors

NXP Semiconductors KTY84/150,153

Name: KTY84/150,153
Brand: NXP Semiconductors
SKU: KTY84/150,153
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KTY84/150,153

Manufacturer:: NXP Semiconductors

Category:: PTC Thermistors

Package:: DO-204AG, DO-34, Axial

Datasheet:: KTY84/150,153.pdf

Description:: SENSOR PTC 603OHM DO34

Quantity:: RFQ Add To RFQ list

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Product details

Overview

KTY84/150,153 from NXP Semiconductors is a silicon-based positive temperature coefficient (PTC) temperature sensor in SOD68 (DO-34) axial-leaded glass package, delivering 950–1050 Ω resistance at 100 °C with ±8.17 K max temperature error and 0.61 %/K nominal temperature coefficient. It operates across −40 °C to +300 °C and is used for precision thermal monitoring in motor windings, power supply thermal protection, and industrial heating systems.

For engineers reviewing the KTY84/150,153 datasheet, KTY84/150,153 pinout, KTY84/150,153 application, or KTY84/150,153 equivalent, this page provides verified resistance vs. temperature data, thermal time constants in air/liquid, continuous current limits per ambient, fail-safe PTC behavior, and direct substitution guidance for high-reliability thermal sensing designs.

Technical Context

The KTY84/150,153 functions as a two-terminal passive resistive sensor requiring external bias current (typically 2 mA) to generate voltage proportional to temperature. Its resistance exhibits near-linear variation over −40 °C to +300 °C, with TC decreasing from 0.84 %/K at −40 °C to 0.29 %/K at 300 °C.

Thermal response is characterized by τ_th = 20 s in still air, 1 s in still liquid, and 0.5 s in flowing liquid - enabling rapid detection of overheating events in sealed enclosures or fluid-coupled systems. Maximum continuous sensor current is derated from 10 mA at 25 °C to 2 mA above 200 °C to prevent self-heating errors.

Key Specifications

Parameter	Value and Actual Design Meaning
R₁₀₀	950–1050 Ω at 100 °C with 2 mA bias - defines baseline calibration point for linearization circuits
Temperature Range	−40 °C to +300 °C - supports operation in automotive under-hood, industrial furnace, and motor stator environments
Temp. Coefficient (TC)	0.61 %/K typical at 100 °C - enables predictable resistance change per degree for analog front-end scaling
R₂₅₀/R₁₀₀	2.111–2.221 - quantifies resistance ratio across wide range, critical for polynomial compensation algorithms
τ_th (flowing liquid)	0.5 s - ensures fast thermal tracking in coolant or oil temperature monitoring applications
I_sen(cont) max	2 mA above 200 °C - prevents >0.5 K self-heating error in high-temp continuous monitoring
Max Temp Error	±8.17 K at 100 °C - sets worst-case accuracy bound for closed-loop thermal control thresholds

Pinout & Package

Package: SOD68 (DO-34) hermetically sealed glass axial-leaded package with nickel-plated leads; 3.04 mm max body diameter, 25.4 mm min lead length.

Pin/Terminal	Circuit Role	Design Meaning
1	Cathode (k)	Reference terminal for bias current return; polarity-sensitive in bridge or differential configurations
2	Anode (a)	Current injection terminal; must be driven with stable current source to avoid voltage-dependent error

Key Features

Feature	Design Value
Fail-safe PTC behavior	Resistance increases with temperature - inherently safe for overtemperature shutdown without active circuitry
Long-term stability	Drift <0.1 %/year - maintains calibration integrity in unattended industrial equipment over multi-year service life
Virtually linear R-T curve	±0.5 % deviation from best-fit line over −20 °C to +150 °C - simplifies analog signal conditioning and reduces MCU processing load
High-temperature capability	Rated to +300 °C - enables direct mounting on transformer windings, IGBT heatsinks, and exhaust manifolds
ESD-sensitive handling	Requires ESD-safe transport and PCB assembly - prevents latent damage that degrades resistance accuracy or long-term drift

Applications

Motor Winding Protection	Power Supply Thermal Monitoring
Use Scenario: Embedded in stator windings of industrial AC motors to detect insulation-overheating conditions before failure. IC Role / Device Role / Timing Role: Passive resistive sensor providing analog temperature feedback to motor protection relay or microcontroller ADC input. Use Value: Enables early-stage thermal fault detection with ±8.17 K accuracy at 100 °C, preventing catastrophic winding burnout and extending motor service life.	Use Scenario: Mounted on DC-DC converter MOSFETs and inductors to monitor thermal rise during sustained load conditions. IC Role / Device Role / Timing Role: Two-terminal analog temperature transducer interfaced to comparator or ADC for thermal throttling or shutdown logic. Use Value: Provides fail-safe PTC response up to 300 °C, triggering immediate power reduction when local hotspot exceeds safe operating limit.
Industrial Oven Control	Automotive Exhaust Gas Recirculation (EGR) Cooler
Use Scenario: Directly embedded in heating element housings of food processing ovens to maintain precise setpoint control across 0–300 °C range. IC Role / Device Role / Timing Role: Primary temperature sensing element in closed-loop PID controller, biased at 2 mA for minimal self-heating. Use Value: Delivers stable resistance output with <0.1 %/year drift, reducing recalibration frequency and ensuring consistent product bake profiles.	Use Scenario: Mounted on EGR cooler housing to monitor coolant-side temperature and prevent condensate formation or thermal shock. IC Role / Device Role / Timing Role: High-temp ruggedized thermal sensor with 0.5 s thermal time constant in flowing coolant, feeding engine ECU. Use Value: Fast thermal response and ±8.17 K accuracy at 100 °C enable precise cooler efficiency management and compliance with emission control strategies.

Motor Winding Protection

Power Supply Thermal Monitoring

Use Scenario: Embedded in stator windings of industrial AC motors to detect insulation-overheating conditions before failure.

IC Role / Device Role / Timing Role: Passive resistive sensor providing analog temperature feedback to motor protection relay or microcontroller ADC input.

Use Value: Enables early-stage thermal fault detection with ±8.17 K accuracy at 100 °C, preventing catastrophic winding burnout and extending motor service life.

Use Scenario: Mounted on DC-DC converter MOSFETs and inductors to monitor thermal rise during sustained load conditions.

IC Role / Device Role / Timing Role: Two-terminal analog temperature transducer interfaced to comparator or ADC for thermal throttling or shutdown logic.

Use Value: Provides fail-safe PTC response up to 300 °C, triggering immediate power reduction when local hotspot exceeds safe operating limit.

Industrial Oven Control

Automotive Exhaust Gas Recirculation (EGR) Cooler

Use Scenario: Directly embedded in heating element housings of food processing ovens to maintain precise setpoint control across 0–300 °C range.

IC Role / Device Role / Timing Role: Primary temperature sensing element in closed-loop PID controller, biased at 2 mA for minimal self-heating.

Use Value: Delivers stable resistance output with <0.1 %/year drift, reducing recalibration frequency and ensuring consistent product bake profiles.

Use Scenario: Mounted on EGR cooler housing to monitor coolant-side temperature and prevent condensate formation or thermal shock.

IC Role / Device Role / Timing Role: High-temp ruggedized thermal sensor with 0.5 s thermal time constant in flowing coolant, feeding engine ECU.

Use Value: Fast thermal response and ±8.17 K accuracy at 100 °C enable precise cooler efficiency management and compliance with emission control strategies.

Equivalent & Alternatives

The following parts are listed as comparable options for similar silicon PTC temperature sensing applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
KTY84/130	R₁₀₀ = 970–1030 Ω; tighter resistance tolerance at 100 °C; ±6.48 K max error at −40 °C	Better low-temp accuracy; preferred where −40 °C to +100 °C range dominates and tighter R₁₀₀ spec is required	Select KTY84/130 when system calibration targets prioritize low-temperature stability over extended high-end range.
KTY84/151	R₁₀₀ = 950–1000 Ω; ±4.19 K max error at 100 °C; lower max error than KTY84/150,153 across full range	Superior absolute accuracy; used where tighter thermal threshold margins are mandated (e.g., safety-critical shutdown)	Choose KTY84/151 when application requires <±5 K error at 100 °C and R₁₀₀ upper limit must not exceed 1000 Ω.

Compared with KTY84/150,153, KTY84/130 offers improved low-temperature accuracy but narrower R₁₀₀ span, while KTY84/151 delivers superior absolute error performance at 100 °C and across the full −40 °C to +300 °C range - making it preferable for safety-critical thermal cutoffs.

Availability

KTY84/150,153 is available at Aetrix Electronics and suitable for motor protection, power supply thermal monitoring, and industrial oven control requiring stable component supply across extended temperature ranges and long service life.

Supply support for KTY84/150,153 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The KTY84 series belongs to NXP's silicon temperature sensor product line, designed specifically for high-reliability, wide-range thermal sensing in harsh environments where stability, fail-safe behavior, and long-term drift resistance are critical.

FAQ

What is the maximum continuous operating current for KTY84/150,153 at 250 °C?

The maximum continuous sensor current for KTY84/150,153 at 250 °C is 2 mA, as specified in Table 5 of the NXP datasheet. This derating prevents excessive self-heating that would introduce >0.5 K measurement error. Operating above this current at elevated temperatures risks accuracy degradation and long-term drift in KTY84/150,153 performance.

Does KTY84/150,153 require polarity-aware circuit design?

Yes, KTY84/150,153 has defined anode (pin 2) and cathode (pin 1) terminals per Table 2. While its resistance is symmetric, correct polarity ensures compatibility with bridge configurations, differential amplifiers, and legacy schematics referencing KTY84/150,153 pinout. Reversing connections may cause mismatch in multi-sensor systems calibrated to pin-specific layout conventions.

How does the thermal time constant of KTY84/150,153 affect its suitability for fast transient detection?

KTY84/150,153 achieves a thermal time constant of 0.5 s in flowing liquid, enabling detection of rapid temperature spikes in coolant or oil paths. In still air, τ_th = 20 s limits responsiveness - so KTY84/150,153 is best applied where thermal mass coupling ensures representative sensing, not for airborne micro-transients. This makes KTY84/150,153 ideal for EGR cooler or transformer winding monitoring but unsuitable for fan-coil airflow surge detection.

Can KTY84/150,153 be used without signal conditioning in a microcontroller ADC interface?

Yes, KTY84/150,153 can interface directly with a microcontroller ADC using a stable 2 mA current source and simple voltage divider or ratiometric readout. Its 950–1050 Ω R₁₀₀ yields ~2.1 V at 100 °C with 5 V supply - well within typical ADC input ranges. However, polynomial compensation is recommended for ±1 K accuracy across −40 °C to +300 °C, as linear approximation alone introduces >3 K error at extremes. The KTY84/150,153 datasheet provides R-T tables to support firmware linearization.

What is the meaning of the marking code 'KT84M' on KTY84/150,153 devices?

'KT84M' is the official marking code for KTY84/150,153, as defined in Table 4 of the NXP datasheet. It appears laser-etched or printed on the glass body and serves as visual identification for traceability and counterfeit prevention. Unlike alphanumeric date codes, KT84M uniquely identifies the KTY84/150,153 variant - distinguishing it from KT84L (KTY84/130) and KT84O (KTY84/151). This marking remains visible after conformal coating and withstands reflow soldering per JEDEC J-STD-020.

KTY84/150,153 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: KTY84

Package/Case:: DO-204AG, DO-34, Axial

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Resistance @ 25°C:: 603 Ohms

Resistance Tolerance:: -

Operating Temperature:: -40°C ~ 300°C

Power - Max:: -

Mounting Type:: Through Hole

Grade:: -

Qualification:: -

Supplier Device Package:: DO-34

KTY84/150,153 FAQ

1.How can I place an order for KTY84/150,153 through Aetrix?

Please submit a Request for Quotation (RFQ) for KTY84/150,153 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for KTY84/150,153 reliable?

The price and inventory of KTY84/150,153 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KTY84/150,153 is usually 5 days.

3.What payment methods are accepted for KTY84/150,153?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KTY84/150,153 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KTY84/150,153?

KTY84/150,153 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KTY84/150,153 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for KTY84/150,153?

For technical support, including KTY84/150,153 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KTY84/150,153 requirements.

6.How does Aetrix verify that KTY84/150,153 is sourced from the original manufacturer or authorized distributors?

All KTY84/150,153 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that KTY84/150,153 meets industry standards.

7.What is the process for return or replacement of KTY84/150,153?

All KTY84/150,153 units undergo pre-shipment inspection (PSI). If there is an issue with KTY84/150,153, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The KTY84/150,153 part is unused and in its original packaging.

Return procedure for KTY84/150,153:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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