NXP Semiconductors KTY83/110,153

Overview

KTY83/110,153 from NXP Semiconductors is a silicon-based positive temperature coefficient (PTC) temperature sensor in a hermetically sealed SOD68 (DO-34) axial-leaded glass package, with nominal resistance R25 = 990–1010 Ω at 25 °C, temperature coefficient TC = 0.76 %/K, and operating range from −55 °C to +175 °C. It delivers fail-safe behavior and near-linear resistance vs. temperature response for analog temperature monitoring in automotive engine control units.

For engineers reviewing the KTY83/110,153 datasheet, KTY83/110,153 pinout, KTY83/110,153 application, or KTY83/110,153 equivalent, this page provides verified pin functions, resistance-temperature mapping, thermal time constants in air/liquid, long-term drift spec (≤1 Ω after 10,000 h at 175 °C), and direct alternatives for industrial thermal sensing designs requiring high stability and PTC safety margin.

Technical Context

The KTY83/110,153 operates as a two-terminal passive resistive sensor: its anode and cathode terminals form a current-driven PTC element where resistance increases monotonically with ambient temperature. Its virtually linear R(T) curve-characterized by R−55/R25 = 0.49–0.51 and R100/R25 = 1.65–1.69-enables direct analog voltage division without complex linearization circuitry.

Thermal response is defined by τth = 20 s in still air, 1 s in still liquid, and 0.5 s in flowing liquid, supporting rapid thermal feedback in coolant or oil monitoring. Maximum continuous sensor current Isen(cont) is limited to 10 mA at 25 °C but derates to 2 mA at 175 °C to prevent self-heating error beyond ±1.31 K at 25 °C.

Key Specifications

Pinout & Package

Package: SOD68 (DO-34), hermetically sealed axial-leaded glass package with 2.54 mm lead spacing and 3.04 mm maximum body diameter.

Key Features

Applications

Equivalent & Alternatives

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

Compared with KTY83/110,153, KTY83/120 offers broader R25 tolerance for cost-sensitive volume production, while KTY83/151 provides lower baseline resistance for improved SNR in low-voltage microcontroller interfaces-neither is pin-compatible without recalibration due to R25 offset.

Availability

KTY83/110,153 is available at Aetrix Electronics and suitable for automotive engine control, industrial oven monitoring, and transmission thermal management requiring stable component supply across extended temperature ranges and long service life.

Supply support for KTY83/110,153 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 analog sensor product line, designed specifically for high-reliability, high-temperature PTC temperature sensing in harsh environments where fail-safe thermal feedback is mandatory.

FAQ

What is the maximum continuous operating current for KTY83/110,153 at 25 °C?

The maximum continuous sensor current Isen(cont) for KTY83/110,153 is 10 mA at Tamb = 25 °C. This limit ensures self-heating remains below 0.1 K under standard 1 mA bias conditions. At elevated temperatures-such as 175 °C-the rating drops to 2 mA to maintain accuracy and reliability. Exceeding these values risks permanent resistance drift or thermal damage. Always verify bias current against ambient temperature using the derating curve in the KTY83/110,153 datasheet.

How does the resistance of KTY83/110,153 change from −55 °C to +175 °C?

KTY83/110,153 exhibits a monotonic positive temperature coefficient: resistance decreases to 485–515 Ω at −55 °C (R−55/R25 = 0.49–0.51) and increases to 2449–2621 Ω at +175 °C. The R100/R25 ratio is 1.65–1.69, confirming consistent PTC behavior across the full range. This predictable progression allows direct use in voltage-divider circuits with minimal linearization-especially effective between 0 °C and 125 °C where temperature error stays within ±3.5 K.

Can KTY83/110,153 be used in flowing liquid environments?

Yes, KTY83/110,153 is qualified for use in flowing liquid with a thermal time constant τth of 0.5 s-enabling sub-second response to temperature transients in coolant or lubricant streams. Its hermetically sealed SOD68 glass package prevents moisture ingress and withstands mechanical vibration common in pump-fed systems. For optimal performance, mount with leads oriented perpendicular to flow direction to minimize turbulence-induced stress on the glass body.

What is the long-term resistance stability of KTY83/110,153 at high temperature?

KTY83/110,153 demonstrates ≤1 Ω resistance drift (∆R25) after 10,000 hours of continuous operation at 175 °C. This stability is validated per IEC 60134 limiting values and reflects the sensor's suitability for automotive under-hood applications with 15+ year service life expectations. The drift specification applies only under specified bias (Isen(cont) = 1 mA) and thermal cycling profiles-exceeding current or temperature ratings accelerates aging.

Is KTY83/110,153 compatible with standard DO-34 socket fixtures?

Yes, KTY83/110,153 uses the industry-standard SOD68 (DO-34) package with 2.54 mm lead spacing and 3.04 mm max body diameter, making it mechanically compatible with DO-34 test sockets, wave-solder pallets, and automated optical inspection (AOI) carriers. Its axial-leaded construction supports both through-hole assembly and manual prototyping. Ensure lead forming avoids bending within 1.5 mm of the glass body to prevent hermeticity loss.