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

NXP Semiconductors KTY83/151,113

Name: KTY83/151,113
Brand: NXP Semiconductors
SKU: KTY83/151,113
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KTY83/151,113

Manufacturer:: NXP Semiconductors

Category:: PTC Thermistors

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

Datasheet:: KTY83/151,113.pdf

Description:: SENSOR PTC 975OHM DO34

Quantity:: RFQ Add To RFQ list

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Inventory:3,819

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Product details

Overview

KTY83/151,113 from NXP Semiconductors is a silicon-based positive temperature coefficient (PTC) temperature sensor in SOD68 (DO-34) axial-leaded glass package, delivering 950–1000 Ω resistance at 25 °C, 0.76 %/K temperature coefficient, and ±3.27 K max temperature error at 25 °C for precision thermal monitoring in motor windings and power supply thermal protection circuits.

For engineers reviewing the KTY83/151,113 datasheet, KTY83/151,113 pinout, KTY83/151,113 application, or KTY83/151,113 equivalent, this page provides verified specifications, terminal roles, real-world use cases, and validated alternative options for industrial temperature sensing designs requiring fail-safe PTC behavior and long-term stability up to +175 °C ambient.

Technical Context

The KTY83/151,113 operates as a two-terminal passive resistive sensor with cathode (pin 1) and anode (pin 2), requiring external bias current (≤1 mA recommended above 100 °C) to generate voltage proportional to temperature. Its PTC response ensures monotonic, fail-safe behavior-resistance increases with rising temperature, eliminating ambiguity during fault conditions.

It exhibits virtually linear resistance vs. temperature characteristics over −55 °C to +175 °C, with R₋₅₅/R₂₅ = 0.49–0.51 and R₁₀₀/R₂₅ = 1.65–1.69, enabling accurate analog temperature measurement using simple ratiometric ADC interfaces without complex polynomial compensation in many embedded control applications.

Key Specifications

Parameter	Value and Actual Design Meaning
R₂₅	950–1000 Ω at 25 °C; defines baseline resistance for calibration and scaling of temperature readout circuitry
Temperature Coefficient	0.76 %/K typical; enables predictable, stable resistance change per degree for analog signal conditioning
R₁₀₀/R₂₅	1.65–1.69; confirms linearity across wide range-supports simplified linear interpolation in firmware
Max Temp Error	±3.27 K at 25 °C; specifies worst-case deviation for closed-loop thermal protection threshold setting
Thermal Time Constant	0.5 s in flowing liquid; determines minimum sampling interval for dynamic thermal event detection
Ambient Range	−55 °C to +175 °C; qualifies for under-hood automotive, industrial motor, and high-temp power electronics
Continuous Current	2 mA max at 175 °C; sets upper limit for bias resistor selection to avoid self-heating errors

Pinout & Package

SOD68 (DO-34) hermetically sealed glass axial-leaded package, 3.04 mm max diameter, 25.4 mm min lead length, 0.55 mm max lead diameter.

Pin/Terminal	Circuit Role	Design Meaning
1 (cathode)	Current sink / reference terminal	Connected to ground or low-side of bias network; polarity-sensitive for correct voltage polarity in measurement
2 (anode)	Current source / signal terminal	Connected to bias resistor or excitation source; output voltage develops across sensor between pins 1 and 2

Key Features

Feature	Design Value
Fail-safe PTC behavior	Resistance increases with temperature-ensures detectable open-circuit or overtemp condition without active circuitry
Long-term stability	≤1 Ω drift after 10,000 h at 175 °C-reduces recalibration frequency in sealed industrial systems
Virtually linear R-T curve	±3.27 K max error at 25 °C and <±7.19 K at −55 °C-enables 1-point or 2-point calibration instead of full lookup table
High-temperature operation	Rated to +175 °C ambient-supports direct mounting on IGBT heatsinks and transformer windings
Hermetic glass encapsulation	SOD68 package with axial leads-provides moisture resistance and mechanical robustness in harsh environments

Applications

Motor Winding Protection	Switch-Mode Power Supply Thermal Monitoring
Use Scenario: Embedded in stator windings of industrial AC motors to detect overheating before insulation failure. IC Role / Device Role / Timing Role: Passive resistive sensor providing analog temperature feedback to motor controller's ADC input. Use Value: Enables immediate shutdown at 150 °C with ±3.27 K accuracy at 25 °C and stable drift ≤1 Ω over 10,000 h at 175 °C.	Use Scenario: Mounted on primary-side heatsink of 1 kW telecom rectifier to monitor MOSFET junction temperature rise. IC Role / Device Role / Timing Role: Two-terminal PTC element interfaced via 1 mA constant-current source and precision op-amp buffer. Use Value: Delivers reliable overtemperature flag generation with 0.5 s thermal response in forced-air cooling, preventing thermal runaway.
Automotive HVAC Blower Motor Control	Industrial Oven Temperature Feedback
Use Scenario: Integrated into brushless DC blower motor assembly for cabin air temperature regulation in passenger vehicles. IC Role / Device Role / Timing Role: Analog temperature transducer connected to microcontroller ADC with ratiometric reference. Use Value: Maintains ±4.53 K max error at 125 °C and withstands 175 °C short-duration transients during engine-off soak conditions.	Use Scenario: Embedded in heating element housing of Class H industrial oven (max 200 °C chamber). IC Role / Device Role / Timing Role: Directly soldered sensor providing continuous resistance readout for PID loop correction. Use Value: Supports closed-loop control with R₁₀₀/R₂₅ = 1.65–1.69 linearity and 1.67 typical ratio-minimizing software compensation overhead.

Motor Winding Protection

Switch-Mode Power Supply Thermal Monitoring

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

IC Role / Device Role / Timing Role: Passive resistive sensor providing analog temperature feedback to motor controller's ADC input.

Use Value: Enables immediate shutdown at 150 °C with ±3.27 K accuracy at 25 °C and stable drift ≤1 Ω over 10,000 h at 175 °C.

Use Scenario: Mounted on primary-side heatsink of 1 kW telecom rectifier to monitor MOSFET junction temperature rise.

IC Role / Device Role / Timing Role: Two-terminal PTC element interfaced via 1 mA constant-current source and precision op-amp buffer.

Use Value: Delivers reliable overtemperature flag generation with 0.5 s thermal response in forced-air cooling, preventing thermal runaway.

Automotive HVAC Blower Motor Control

Industrial Oven Temperature Feedback

Use Scenario: Integrated into brushless DC blower motor assembly for cabin air temperature regulation in passenger vehicles.

IC Role / Device Role / Timing Role: Analog temperature transducer connected to microcontroller ADC with ratiometric reference.

Use Value: Maintains ±4.53 K max error at 125 °C and withstands 175 °C short-duration transients during engine-off soak conditions.

Use Scenario: Embedded in heating element housing of Class H industrial oven (max 200 °C chamber).

IC Role / Device Role / Timing Role: Directly soldered sensor providing continuous resistance readout for PID loop correction.

Use Value: Supports closed-loop control with R₁₀₀/R₂₅ = 1.65–1.69 linearity and 1.67 typical ratio-minimizing software compensation overhead.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
KTY83/121	R₂₅ = 980–1000 Ω; tighter tolerance than KTY83/151,113; R₋₅₅/R₂₅ = 0.49–0.51 same	Better baseline accuracy at 25 °C but higher max temp error (±4.53 K at 125 °C vs. ±4.73 K for KTY83/151,113)	Select when 25 °C calibration precision is prioritized over extended-range stability
KTY83/122	R₂₅ = 1000–1020 Ω; highest nominal R₂₅ in series; TC = 0.76 %/K identical	Higher resistance improves SNR in high-impedance bias networks but requires adjusted gain scaling	Choose for noise-sensitive analog front-ends where 1000–1020 Ω baseline simplifies resistor matching

Compared with KTY83/151,113, KTY83/121 offers tighter R₂₅ tolerance for improved room-temperature calibration, while KTY83/122 provides higher baseline resistance to reduce relative noise impact-both share identical SOD68 packaging, thermal time constants, and 175 °C rating, making them drop-in alternatives only if R₂₅ and error budget align with system requirements.

Availability

KTY83/151,113 is available at Aetrix Electronics and suitable for motor winding protection, switch-mode power supply thermal monitoring, and industrial oven temperature feedback requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for KTY83/151,113 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 KTY83 series was designed by NXP for high-reliability analog temperature sensing in harsh environments-targeting applications demanding fail-safe PTC behavior, long-term drift stability, and operation beyond 150 °C ambient.

FAQ

What is the maximum continuous operating temperature for the KTY83/151,113?

The KTY83/151,113 is rated for continuous operation from −55 °C to +175 °C ambient temperature. At +175 °C, its maximum continuous sensor current is limited to 2 mA to prevent self-heating-induced measurement error. The device maintains specified resistance tolerance and drift performance within this full range, as confirmed in Table 5 and Table 9 of the NXP datasheet Rev. 06.

How does the KTY83/151,113 differ from thermistors with negative temperature coefficients (NTCs)?

Unlike NTC thermistors, the KTY83/151,113 exhibits a positive temperature coefficient (PTC), meaning its resistance increases predictably with rising temperature. This provides inherent fail-safe behavior-open-circuit or overtemperature faults yield unambiguous high-resistance states. Its near-linear R-T curve (R₁₀₀/R₂₅ = 1.65–1.69) also reduces firmware complexity compared to highly nonlinear NTCs requiring extensive lookup tables or polynomial fitting.

What is the recommended excitation current for accurate measurements with the KTY83/151,113?

NXP specifies 1 mA as the standard test condition for resistance measurements and recommends Isen(cont) = 1 mA for temperatures above 100 °C to minimize self-heating error. At lower temperatures, currents up to 10 mA are permissible in free air (Table 5), but maintaining 1 mA ensures consistent calibration across the full −55 °C to +175 °C range and avoids deviation visible in Figure 4 of the datasheet.

Can the KTY83/151,113 be used in flowing liquid environments?

Yes-the KTY83/151,113 has a thermal time constant of 0.5 s in flowing liquid (Table 6), making it suitable for immersion applications such as coolant temperature monitoring in industrial pumps or battery thermal management systems. Its hermetically sealed SOD68 glass package ensures long-term reliability in wet or humid conditions without delamination or parameter shift.

What marking code identifies the KTY83/151,113 on the device body?

The KTY83/151,113 is marked with the code "KT83K" on its glass body, as specified in Table 4 of the NXP datasheet. This laser-marked identifier allows visual verification during PCB assembly and field service, distinguishing it from other KTY83 variants like KT83A (KTY83/110) or KT83H (KTY83/150).

KTY83/151,113 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: KTY83

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Resistance @ 25°C:: 975 Ohms

Resistance Tolerance:: -

Operating Temperature:: -55°C ~ 175°C

Power - Max:: -

Mounting Type:: Through Hole

Grade:: -

Qualification:: -

Supplier Device Package:: DO-34

KTY83/151,113 FAQ

1.How can I place an order for KTY83/151,113 through Aetrix?

Please submit a Request for Quotation (RFQ) for KTY83/151,113 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 KTY83/151,113 reliable?

The price and inventory of KTY83/151,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KTY83/151,113 is usually 5 days.

3.What payment methods are accepted for KTY83/151,113?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KTY83/151,113 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KTY83/151,113?

KTY83/151,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KTY83/151,113 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 KTY83/151,113?

For technical support, including KTY83/151,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KTY83/151,113 requirements.

6.How does Aetrix verify that KTY83/151,113 is sourced from the original manufacturer or authorized distributors?

All KTY83/151,113 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 KTY83/151,113 meets industry standards.

7.What is the process for return or replacement of KTY83/151,113?

All KTY83/151,113 units undergo pre-shipment inspection (PSI). If there is an issue with KTY83/151,113, 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 KTY83/151,113 part is unused and in its original packaging.

Return procedure for KTY83/151,113:

1.Submit a request within 90 days.

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

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