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NXP Semiconductors KTY83/120,153
- Part No.:
- KTY83/120,153
- Manufacturer:
- NXP Semiconductors
- Category:
- PTC Thermistors
- Package:
- DO-204AG, DO-34, Axial
- Datasheet:
-
KTY83/120,153.pdf
- Description:
- SENSOR PTC 1KOHM DO34
- Quantity:
- Payment:
- Shipping:
Inventory:2,827
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Product details
Overview
KTY83/120,153 from NXP Semiconductors is a silicon-based positive temperature coefficient (PTC) temperature sensor in SOD68 (DO-34) axial-leaded glass package, with nominal resistance of 1000 Ω at 25 °C, ±0.76 %/K temperature coefficient, and operating range from −55 °C to +175 °C. It delivers fail-safe behavior and near-linear resistance vs. temperature response for precision thermal monitoring in automotive engine control units and industrial motor drives.
For engineers reviewing the KTY83/120,153 datasheet, KTY83/120,153 pinout, KTY83/120,153 application, or KTY83/120,153 equivalent, this page provides verified specifications, terminal roles, real-world use cases, and validated alternative options for thermal sensing in high-reliability embedded systems.
Technical Context
The KTY83/120,153 operates as a two-terminal passive PTC resistor whose resistance increases predictably with ambient temperature. Its silicon die exhibits virtually linear R–T characteristics over −55 °C to +150 °C, with drift ≤1 Ω after 10,000 h at 175 °C.
It requires a constant current excitation (recommended 1 mA) to avoid self-heating errors; maximum continuous current is 10 mA at 25 °C but reduces to 2 mA at 175 °C. Thermal time constant is 20 s in still air, 1 s in still liquid, and 0.5 s in flowing liquid - enabling rapid thermal response in fluid-coupled applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R25 | 980–1020 Ω at 25 °C with 1 mA bias - defines baseline calibration point for analog front-end scaling |
| Temperature Coefficient | 0.76 %/K - enables direct voltage-to-temperature conversion using simple resistor-divider circuits |
| R100/R25 | 1.65–1.69 - confirms predictable resistance ratio at 100 °C, supporting fixed-point verification in production test |
| Operating Range | −55 °C to +175 °C - suitable for under-hood automotive, industrial furnace, and power electronics thermal monitoring |
| Thermal Time Constant | 0.5 s in flowing liquid - ensures fast dynamic response in coolant or oil temperature sensing |
| Max Continuous Current | 2 mA at 175 °C - limits self-heating error to <±0.5 K in high-temp environments |
| Resistance Drift | ≤1 Ω after 10,000 h at 175 °C - guarantees long-term calibration stability in mission-critical systems |
Pinout & Package
Package: SOD68 (DO-34), hermetically sealed glass axial-leaded package with 2 leads, 3.04 mm max diameter, 25.4 mm min lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (cathode, k) | Reference terminal for current sourcing | Connected to ground or low-side of bias current source; polarity-sensitive for correct bias direction |
| 2 (anode, a) | Sensing terminal for voltage measurement | Connected to ADC input or op-amp buffer; voltage drop across device reflects temperature-dependent resistance |
Key Features
| Feature | Design Value |
|---|---|
| Fail-safe PTC behavior | Resistance increases with temperature - prevents undetected open-circuit failure modes in safety-critical thermal shutdown paths |
| Virtually linear R–T curve | ±1.31 K max error at 25 °C and ±5.22 K at 100 °C - simplifies firmware compensation and eliminates need for complex lookup tables |
| Long-term stability | ≤1 Ω resistance drift after 10,000 h at 175 °C - maintains calibration integrity over full product lifetime without field recalibration |
| High-temperature capability | Rated to +175 °C ambient - supports direct mounting on IGBT heatsinks, motor windings, and exhaust manifolds |
| Hermetic glass encapsulation | SOD68 package with axial leads - ensures moisture and chemical resistance in harsh under-hood or industrial environments |
Applications
| Automotive Engine Coolant Monitoring | Industrial Motor Winding Protection |
|---|---|
Use Scenario: Real-time coolant temperature measurement in ICE powertrain control modules. IC Role / Device Role / Timing Role: Two-terminal analog temperature transducer providing resistance output proportional to coolant temperature. Use Value: Enables precise fuel injection timing and fan activation logic with ±2.62 K accuracy at 25 °C and robust operation up to 125 °C coolant temperature. |
Use Scenario: Overtemperature detection in three-phase AC induction motor stator windings. IC Role / Device Role / Timing Role: Direct-mount PTC sensor embedded in winding insulation to detect thermal runaway conditions. Use Value: Triggers immediate shutdown at 150 °C with <1 s thermal response in oil-immersed windings, preventing insulation breakdown. |
| Power Supply Thermal Management | Industrial Oven Temperature Control |
Use Scenario: Hot-spot monitoring on DC-DC converter PCBs and MOSFET heatsinks. IC Role / Device Role / Timing Role: Surface-mounted or leaded thermal sensor measuring local junction temperature rise. Use Value: Supports dynamic derating of switching frequency based on real-time thermal feedback, extending component life by >30 %. |
Use Scenario: Closed-loop temperature regulation in batch-process industrial ovens (100–300 °C range). IC Role / Device Role / Timing Role: High-stability reference sensor mounted in oven chamber wall for PID controller feedback. Use Value: Maintains ±3.59 K accuracy at 100 °C and withstands repeated thermal cycling to 175 °C without calibration shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PTC temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| KTY83/110 | R25 = 990–1010 Ω; tighter initial tolerance; lower max temp error at 25 °C (±3.08 K vs. ±4.11 K) | Better suited for precision calibration references where 25 °C accuracy dominates system spec | Select when baseline accuracy at room temperature is prioritized over extended high-temp linearity |
| KTY83/151 | R25 = 950–1000 Ω; wider resistance spread; higher max temp error at 100 °C (±6.04 K vs. ±5.22 K) but improved low-temp stability below −20 °C | Preferred for wide-range HVAC or refrigeration systems requiring reliable −40 °C operation | Choose when operating below −30 °C is required and moderate 100 °C error is acceptable |
Compared with KTY83/120,153, KTY83/110 offers superior 25 °C accuracy for calibration-critical nodes, while KTY83/151 trades mid-range precision for enhanced low-temperature reliability - enabling selection aligned to dominant thermal operating zone rather than full-range compromise.
Availability
KTY83/120,153 is available at Aetrix Electronics and suitable for automotive engine control, industrial motor protection, and power supply thermal management requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for KTY83/120,153 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 belongs to NXP's silicon temperature sensor product line, designed specifically for high-reliability, high-temperature analog thermal sensing in safety-critical automotive and industrial systems.
FAQ
What is the recommended bias current for KTY83/120,153 to minimize self-heating error?
The KTY83/120,153 datasheet specifies 1 mA as the recommended continuous sensor current for accurate measurements. At this level, self-heating remains below ±0.1 K across the full −55 °C to +125 °C range. Exceeding 2 mA at elevated ambient temperatures risks measurable offset due to Joule heating - always verify thermal error budget in your specific PCB layout and airflow conditions when using KTY83/120,153.
Can KTY83/120,153 be used in automotive under-hood applications?
Yes, KTY83/120,153 is qualified for automotive under-hood use with an ambient operating range of −55 °C to +175 °C and hermetic SOD68 glass packaging. Its fail-safe PTC behavior, long-term stability (<1 Ω drift after 10,000 h at 175 °C), and resistance to thermal shock make it suitable for engine coolant, transmission oil, and turbocharger temperature monitoring - all critical applications where KTY83/120,153 delivers proven reliability.
How does the R100/R25 ratio of KTY83/120,153 support system-level calibration?
The KTY83/120,153 has a guaranteed R100/R25 ratio of 1.65–1.69, enabling two-point calibration at 25 °C and 100 °C without requiring full temperature sweep. This allows production test fixtures to validate sensor linearity and reject outliers early - a key advantage when deploying KTY83/120,153 in high-volume automotive or industrial manufacturing where test throughput and yield matter.
What is the thermal time constant of KTY83/120,153 in flowing liquid, and why does it matter?
The thermal time constant of KTY83/120,153 is 0.5 s in flowing liquid, meaning it reaches 63.2 % of a step-change temperature difference within half a second. This rapid response is essential for closed-loop thermal control in dynamic systems like engine coolant loops or hydraulic oil circuits - ensuring KTY83/120,153 delivers timely feedback to prevent thermal runaway before damage occurs.
Is KTY83/120,153 compatible with standard PCB assembly processes including reflow soldering?
KTY83/120,153 uses a glass SOD68 package with axial leads and is not rated for standard lead-free reflow soldering profiles. It is intended for through-hole mounting with hand-soldering or wave soldering at peak temperatures ≤300 °C for <5 s. Reflow exposure risks internal stress cracking or hermeticity loss - always mount KTY83/120,153 post-reflow and verify mechanical retention per NXP's package handling guidelines.
KTY83/120,153 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 kOhms
- Resistance Tolerance:
- -
- Operating Temperature:
- -55°C ~ 175°C
- Power - Max:
- -
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- DO-34
KTY83/120,153 FAQ
1.How can I place an order for KTY83/120,153 through Aetrix?
Please submit a Request for Quotation (RFQ) for KTY83/120,153 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 KTY83/120,153 reliable?
The price and inventory of KTY83/120,153 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for KTY83/120,153 is usually 5 days.
3.What payment methods are accepted for KTY83/120,153?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for KTY83/120,153 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for KTY83/120,153?
KTY83/120,153 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your KTY83/120,153 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 KTY83/120,153?
For technical support, including KTY83/120,153 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your KTY83/120,153 requirements.
6.How does Aetrix verify that KTY83/120,153 is sourced from the original manufacturer or authorized distributors?
All KTY83/120,153 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 KTY83/120,153 meets industry standards.
7.What is the process for return or replacement of KTY83/120,153?
All KTY83/120,153 units undergo pre-shipment inspection (PSI). If there is an issue with KTY83/120,153, 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 KTY83/120,153 part is unused and in its original packaging.
Return procedure for KTY83/120,153:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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