KTY84/150,153 PTC Thermistor Equivalent & Substitute Parts

Part Overview

The KTY84/150,153 is a PTC thermistor manufactured by NXP USA Inc., rated at 603 Ohms with DO-204AG/DO-34 axial packaging. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations. The operating temperature range of -40°C to 300°C and through-hole mounting configuration define its primary application scope. Substitute parts must maintain functional equivalence within the allowed electrical and mechanical parameters for temperature sensing applications.

Substiute Parts

KTY84/150,153

NXP USA Inc.In Stock: 1049KTY84/150,153 Datasheet

Current PartRFQ

STS110003CHIP

CanthermIn Stock: 5577STS110003CHIP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part identification for the KTY84/150,153 is based on the following critical parameters:

• Mounting Type: Through-hole axial configuration required for PCB compatibility
• Package / Case: Axial form factor for mechanical fit
• Functional Category: PTC thermistor for temperature sensing applications
• Resistance Value: Nominal resistance at 25°C (603 Ohms for primary part)
• Operating Temperature Range: Minimum coverage of application temperature requirements
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status

The STS110003CHIP from Cantherm qualifies as a substitute based on shared mounting type (through-hole), axial package configuration, PTC thermistor functionality, and equivalent regulatory compliance. Resistance tolerance and maximum power rating are secondary parameters that define operational boundaries within the substitution relationship.

Parameter Comparison

Engineering Selection Recommendations

The STS110003CHIP is an active product with current manufacturing support, addressing the obsolescence status of the KTY84/150,153. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications.

Selection of the STS110003CHIP requires verification that the application operating temperature does not exceed 170°C, as this represents the upper limit for the substitute part compared to the 300°C maximum of the original component. The resistance value difference (1K Ohm vs. 603 Ohms) and tolerance specification (±3%) must be evaluated against circuit design requirements.

Both components share identical through-hole axial packaging and MSL rating, supporting direct mechanical and environmental compatibility in PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the STS110003CHIP directly replace the KTY84/150,153 in all applications?

A: Direct replacement is limited by operating temperature range. The STS110003CHIP operates to 170°C maximum, while the KTY84/150,153 operates to 300°C. Applications requiring temperatures above 170°C require alternative solutions.

Q: What is the significance of the resistance value difference between 603 Ohms and 1K Ohm?

A: Resistance value determines the thermistor's response characteristics and circuit behavior. Circuit design must accommodate the 1K Ohm nominal value of the substitute part. Tolerance specifications (±3% for STS110003CHIP) define acceptable resistance variation.

Q: Are the packages mechanically compatible?

A: Both components use through-hole axial packaging, supporting mechanical compatibility for PCB mounting. Lead spacing and form factor are equivalent for standard through-hole assembly processes.

Q: What compliance certifications apply to both parts?

A: Both the KTY84/150,153 and STS110003CHIP maintain ROHS3 compliance and REACH unaffected status, supporting use in regulated industrial and consumer applications.

Q: Why is the KTY84/150,153 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The STS110003CHIP, classified as active, represents a current manufacturing alternative with ongoing supplier support.