NXP Semiconductors KTY84/130,153

Overview

KTY84/130,153 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 of 970–1030 Ω at +100 °C and ±4.9 K max temperature error at that point, used for precision thermal monitoring in industrial heating systems, motor windings, and power supply thermal protection.

For engineers reviewing the KTY84/130,153 datasheet, KTY84/130,153 pinout, KTY84/130,153 application, or KTY84/130,153 equivalent, this page delivers verified electrical characteristics, validated SOD68 terminal mapping, confirmed ambient temperature range (−40 °C to +300 °C), and real-world substitution guidance for high-reliability thermal sensing designs.

Technical Context

The KTY84/130,153 operates as a two-terminal passive PTC resistor whose resistance increases predictably with temperature-no excitation voltage or bias circuitry required beyond a stable 2 mA continuous current source. Its linearized response (0.61 %/K typical TC) enables direct analog-to-temperature conversion using simple ratiometric measurement techniques.

Designed for harsh environments, it features nickel-plated leads, hermetic glass encapsulation, and fail-safe behavior: resistance rises monotonically with temperature, eliminating ambiguity during overtemperature events. Thermal time constant is 1 s in still liquid and 20 s in still air, supporting both fast-response immersion and slower ambient-air sensing.

Key Specifications

Pinout & Package

Hermetically sealed SOD68 (DO-34) glass package with axial leads, 3.04 mm max body diameter, 25.4 mm min lead length, and nickel-plated terminations for corrosion resistance and solderability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with KTY84/150 and TSI301-130, the KTY84/130,153 offers the tightest R₁₀₀ tolerance and lowest temperature error in its family, making it optimal for closed-loop control systems requiring <±5 K thermal accuracy above +100 °C-while maintaining full SOD68 compatibility and proven long-term stability in glass-encapsulated construction.

Availability

KTY84/130,153 is available at Aetrix Electronics and suitable for industrial oven control, motor winding protection, and power supply thermal foldback requiring stable component supply across extended temperature ranges and multi-year production cycles.

Supply support for KTY84/130,153 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 analog sensor product line, designed specifically for high-accuracy, high-temperature, fail-safe thermal monitoring in safety-critical industrial and power systems.

FAQ

What is the exact resistance tolerance of KTY84/130,153 at +100 °C?

The KTY84/130,153 has a guaranteed resistance range of 970 Ω to 1030 Ω at +100 °C when measured with a continuous sensor current of 2 mA. This ±30 Ω (±3.0 %) tolerance defines its primary calibration window and is tighter than the KTY84/150 variant's ±50 Ω spec. The value is verified per Table 1 and Table 6 in the official NXP datasheet Rev. 06.

Does KTY84/130,153 require external biasing or signal conditioning?

No, the KTY84/130,153 is a passive two-terminal device requiring only a stable 2 mA current source to generate a measurable voltage drop. It does not integrate amplification, ADC, or digital interface-its output is purely resistive. Signal conditioning (e.g., op-amp buffering or ratiometric ADC referencing) must be implemented externally based on system requirements, as confirmed in Section 6 "Characteristics" of the NXP datasheet.

Can KTY84/130,153 be used above +200 °C without derating?

Yes, but only with Isen(cont) = 2 mA, as explicitly mandated in Note [1] of Table 5 (Limiting Values). At +300 °C ambient, the maximum allowable continuous current drops to 2 mA to prevent excessive self-heating. Operation above +200 °C with higher current violates absolute maximum ratings and risks permanent drift or failure-this constraint is non-negotiable and documented in the NXP KTY84_SER_6 datasheet.

What is the thermal time constant of KTY84/130,153 in air versus liquid?

The KTY84/130,153 has a thermal time constant of 20 seconds in still air and 1 second in still liquid, per Table 6. In flowing liquid, it reduces further to 0.5 seconds. These values reflect physical thermal mass and heat transfer efficiency-not electrical timing-and directly impact how rapidly the KTY84/130,153 tracks ambient temperature changes in real-world mounting conditions.

Is KTY84/130,153 RoHS compliant and halogen-free?

Yes, the KTY84/130,153 meets RoHS Directive 2011/65/EU and is halogen-free per IEC 61249-2-21. This is confirmed by NXP's material declaration documents and product change notifications dated after 2008, aligning with the KTY84_SER_6 datasheet revision. Lead finish is matte tin over nickel, fully compliant with JEDEC J-STD-609A Class 1.