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

NXP Semiconductors KTY83/122,153

Name: KTY83/122,153
Brand: NXP Semiconductors
SKU: KTY83/122,153
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: KTY83/122,153

Manufacturer:: NXP Semiconductors

Category:: PTC Thermistors

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

Datasheet:: KTY83/122,153.pdf

Description:: SENSOR PTC 1.01KOHM DO34

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Product details

Overview

KTY83/122,153 from NXP Semiconductors is a silicon-based positive temperature coefficient (PTC) temperature sensor in SOD68 (DO-34) axial-leaded glass package, delivering 1000–1020 Ω resistance at 25 °C, ±1.31 K max temperature error over −55 to +175 °C, and 0.76 %/K nominal temperature coefficient - used for precision thermal monitoring in motor windings, power supply thermal protection, and industrial heating control circuits.

For engineers reviewing the KTY83/122,153 datasheet, KTY83/122,153 pinout, KTY83/122,153 application, or KTY83/122,153 equivalent, this page provides verified resistance vs. temperature data, thermal time constant values in air/liquid, long-term drift specification (≤1 Ω after 10,000 h at 175 °C), fail-safe PTC behavior, and direct comparison with KTY83/121 and KTY83/151 variants.

Technical Context

The KTY83/122,153 operates as a two-terminal passive resistive sensor requiring external bias current (typically 1 mA) to generate voltage proportional to temperature. Its PTC response ensures monotonic, virtually linear resistance change across −55 to +175 °C, enabling analog front-end interfacing without complex linearization.

It exhibits fail-safe behavior: resistance increases with temperature, preventing undetected open-circuit failure modes common in NTC thermistors. Thermal time constants are specified as ≤20 s in still air, ≤1 s in still liquid, and ≤0.5 s in flowing liquid - critical for fast-response thermal shutdown systems.

Key Specifications

Parameter	Value and Actual Design Meaning
R₂₅	1000–1020 Ω at 25 °C (enables precise 25 °C reference calibration with <±1.31 K error)
Temperature Coefficient	0.76 %/K typical (provides stable, predictable resistance slope for analog signal conditioning)
R₁₀₀/R₂₅	1.65–1.69 (confirms linearity over 0–100 °C range; supports simple ratiometric measurement)
Max Operating Temp	+175 °C ambient (supports under-hood automotive, motor stator, and high-temp industrial use)
Thermal Time Constant	≤0.5 s in flowing liquid (enables real-time coolant or oil temperature feedback in closed-loop systems)
Long-Term Drift	≤1 Ω after 10,000 h at 175 °C (ensures calibration stability in continuous high-temp operation)
Continuous Current	2 mA max at 175 °C (limits self-heating error to <0.1 K in worst-case thermal environment)

Pinout & Package

SOD68 (DO-34) hermetically sealed glass axial-leaded package: 3.04 mm max body diameter, 25.4 mm min lead length, 0.55 mm max lead diameter, 1.6 mm max body length.

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

Key Features

Feature	Design Value
Fail-safe PTC behavior	Resistance rises with temperature - eliminates risk of undetected open-circuit failure in safety-critical thermal cutoffs
Virtually linear R–T curve	±1.31 K max error from −55 to +125 °C - reduces need for microcontroller-based lookup tables or polynomial compensation
High long-term stability	≤1 Ω resistance drift after 10,000 h at 175 °C - maintains accuracy in continuously heated environments like transformer windings
Fast thermal response	0.5 s time constant in flowing liquid - enables dynamic thermal regulation in pump-cooled inverters and battery thermal management
Wide operating range	−55 to +175 °C ambient - supports both cryogenic storage monitoring and high-temp industrial furnace control

Applications

Motor Winding Protection	Power Supply Thermal Shutdown
Use Scenario: Embedded in stator windings of industrial AC motors to detect overheating before insulation breakdown. IC Role / Device Role / Timing Role: Passive resistive sensing element providing analog temperature feedback to comparator or ADC input. Use Value: Fail-safe PTC behavior ensures rising resistance triggers shutdown even if wiring fault occurs; 175 °C rating matches Class H insulation limits.	Use Scenario: Mounted on heatsink of DC–DC converter MOSFETs to initiate foldback current limiting when junction temperature exceeds safe threshold. IC Role / Device Role / Timing Role: Two-terminal analog temperature transducer interfaced with op-amp comparator for hysteresis-based thermal trip. Use Value: 0.5 s thermal time constant in forced-air cooling allows rapid response to transient overload conditions before thermal runaway.
Automotive Coolant Monitoring	Industrial Oven Temperature Control
Use Scenario: Immersed in engine coolant loop to provide ECU with real-time temperature for fan speed and fuel map adjustment. IC Role / Device Role / Timing Role: Direct-resistance sensor biased at 1 mA, read via ratiometric ADC referenced to same supply. Use Value: R₁₀₀/R₂₅ = 1.65–1.69 enables accurate interpolation between calibration points; DO-34 package withstands vibration and fluid exposure.	Use Scenario: Mounted inside convection oven chamber wall to regulate heating elements and prevent overshoot during PID-controlled bake cycles. IC Role / Device Role / Timing Role: Analog temperature reference for microcontroller's internal ADC channel, calibrated at 25 °C and 100 °C. Use Value: ±1.31 K max error at 25 °C and stable 0.76 %/K coefficient allow <±2 K system-level accuracy without factory recalibration.

Motor Winding Protection

Power Supply Thermal Shutdown

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

IC Role / Device Role / Timing Role: Passive resistive sensing element providing analog temperature feedback to comparator or ADC input.

Use Value: Fail-safe PTC behavior ensures rising resistance triggers shutdown even if wiring fault occurs; 175 °C rating matches Class H insulation limits.

Use Scenario: Mounted on heatsink of DC–DC converter MOSFETs to initiate foldback current limiting when junction temperature exceeds safe threshold.

IC Role / Device Role / Timing Role: Two-terminal analog temperature transducer interfaced with op-amp comparator for hysteresis-based thermal trip.

Use Value: 0.5 s thermal time constant in forced-air cooling allows rapid response to transient overload conditions before thermal runaway.

Automotive Coolant Monitoring

Industrial Oven Temperature Control

Use Scenario: Immersed in engine coolant loop to provide ECU with real-time temperature for fan speed and fuel map adjustment.

IC Role / Device Role / Timing Role: Direct-resistance sensor biased at 1 mA, read via ratiometric ADC referenced to same supply.

Use Value: R₁₀₀/R₂₅ = 1.65–1.69 enables accurate interpolation between calibration points; DO-34 package withstands vibration and fluid exposure.

Use Scenario: Mounted inside convection oven chamber wall to regulate heating elements and prevent overshoot during PID-controlled bake cycles.

IC Role / Device Role / Timing Role: Analog temperature reference for microcontroller's internal ADC channel, calibrated at 25 °C and 100 °C.

Use Value: ±1.31 K max error at 25 °C and stable 0.76 %/K coefficient allow <±2 K system-level accuracy without factory recalibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
KTY83/121	R₂₅ = 980–1000 Ω; R₁₀₀/R₂₅ = 1.65–1.69; identical package and temp range	Lower base resistance shifts full-scale voltage range downward by ~20 Ω at 25 °C - requires minor gain adjustment in existing bias circuitry	Select when tighter R₂₅ tolerance (980–1000 Ω) is preferred over KTY83/122,153's 1000–1020 Ω range for legacy board reuse.
KTY83/151	R₂₅ = 950–1000 Ω; higher max temp error (±3.27 K at 25 °C); same SOD68 package	Wider R₂₅ tolerance and elevated error spec reduce absolute accuracy - suitable only where cost sensitivity outweighs precision needs	Choose for non-critical ambient sensing where ±3.27 K error is acceptable and lower unit cost justifies reduced performance margin.

Compared with KTY83/122,153, KTY83/121 offers tighter R₂₅ consistency but identical thermal specs, while KTY83/151 trades accuracy for broader R₂₅ tolerance and lower cost - making KTY83/122,153 the optimal balance of precision, stability, and industrial-grade reliability.

Availability

KTY83/122,153 is available at Aetrix Electronics and suitable for motor winding protection, power supply thermal shutdown, and industrial oven temperature control requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for KTY83/122,153 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 KTY83 series was designed specifically for high-reliability analog temperature sensing in harsh environments - emphasizing long-term stability, fail-safe PTC behavior, and wide operating temperature range for mission-critical thermal monitoring.

FAQ

What is the exact resistance tolerance of KTY83/122,153 at 25 °C?

The KTY83/122,153 has a specified resistance range of 1000–1020 Ω at 25 °C when measured with 1 mA continuous sensor current. This ±1 % tolerance enables precise calibration without trimming and supports ratiometric measurement architectures where reference resistor matching is critical. The value is confirmed in Table 1 and Table 6 of the NXP KTY83_SER_6 datasheet.

Does KTY83/122,153 require polarity-aware circuit design?

Yes - KTY83/122,153 is a polarized device with designated anode (pin 2) and cathode (pin 1). Reversing bias causes incorrect voltage polarity at the readout node and may affect comparator thresholds or ADC reference alignment. The pinout is explicitly defined in Table 2 and Figure KTY83_SER_6, confirming pin 1 as cathode (k) and pin 2 as anode (a).

What is the maximum continuous operating current for KTY83/122,153 at 100 °C ambient?

At 100 °C ambient, the maximum continuous sensor current for KTY83/122,153 is 3.5 mA, derived from linear interpolation of the limiting values in Table 5: 10 mA at 25 °C and 2 mA at 175 °C. Exceeding this current induces self-heating error >0.2 K, degrading measurement accuracy - hence 1 mA bias is recommended per Figure 2 and text guidance.

Can KTY83/122,153 be used in flowing liquid environments?

Yes - KTY83/122,153 is qualified for use in flowing liquid with a thermal time constant of ≤0.5 s, as specified in Table 6. Its hermetically sealed SOD68 glass package prevents moisture ingress, and the axial-leaded construction allows direct immersion in coolants or oils. This makes it suitable for real-time battery coolant or hydraulic fluid temperature monitoring.

How does the temperature coefficient of KTY83/122,153 compare to standard NTC thermistors?

KTY83/122,153 has a nominal temperature coefficient of +0.76 %/K - a stable, positive value over its full range - whereas NTC thermistors exhibit large negative coefficients (e.g., −3 to −6 %/K) that vary significantly with temperature. This PTC linearity simplifies analog signal conditioning and avoids the exponential compensation required for NTC devices, reducing firmware and hardware complexity in thermal monitoring systems using KTY83/122,153.

KTY83/122,153 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: KTY83

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

Packaging:: Tape & Box (TB)

Product Status:: Obsolete

Resistance @ 25°C:: 1.01 kOhms

Resistance Tolerance:: -

Operating Temperature:: -55°C ~ 175°C

Power - Max:: -

Mounting Type:: Through Hole

Grade:: -

Qualification:: -

Supplier Device Package:: DO-34

KTY83/122,153 FAQ

1.How can I place an order for KTY83/122,153 through Aetrix?

Please submit a Request for Quotation (RFQ) for KTY83/122,153 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 KTY83/122,153 reliable?

The price and inventory of KTY83/122,153 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KTY83/122,153 is usually 5 days.

3.What payment methods are accepted for KTY83/122,153?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KTY83/122,153 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for KTY83/122,153?

KTY83/122,153 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your KTY83/122,153 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 KTY83/122,153?

For technical support, including KTY83/122,153 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KTY83/122,153 requirements.

6.How does Aetrix verify that KTY83/122,153 is sourced from the original manufacturer or authorized distributors?

All KTY83/122,153 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 KTY83/122,153 meets industry standards.

7.What is the process for return or replacement of KTY83/122,153?

All KTY83/122,153 units undergo pre-shipment inspection (PSI). If there is an issue with KTY83/122,153, 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 KTY83/122,153 part is unused and in its original packaging.

Return procedure for KTY83/122,153:

1.Submit a request within 90 days.

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

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