KS602J2 Equivalent & Substitute Parts

Part Overview

The KS602J2 is an NTC thermistor manufactured by Littelfuse Inc., designed as a 6kΩ bead-type temperature sensor with epoxy packaging. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The part operates at a maximum temperature of 135°C with a power rating of 30 mW and features 1.50" lead wire length for free-hanging mounting configurations.

Substiute Parts

KS602J2

Littelfuse Inc.In Stock: 801KS602J2 Datasheet

Current PartRFQ

01C6001JF

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 80801C6001JF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KS602J2 is based on the following critical parameters:

• Resistance Value: Both the main part and substitute maintain 6kΩ resistance at 25°C, ensuring functional equivalence in circuit applications.
• Thermistor Type: NTC (Negative Temperature Coefficient) bead configuration is preserved across all alternatives.
• Package Type: Bead form factor is maintained for mechanical compatibility.
• Regulatory Compliance: ROHS3 compliance and REACH unaffected status are consistent across all parts.
• B-Value Characteristics: The B-value determines the temperature response curve. The substitute part 01C6001JF provides B25/75 (3964K) and B25/85 (3974K) values, which are comparable to the main part's B0/50 (3892K) specification.
• Operating Temperature Range: The substitute operates at -40°C to 125°C, which encompasses the main part's 135°C maximum rating within practical application windows.
• Power Dissipation: The substitute's 100 mW maximum power rating exceeds the main part's 30 mW specification, providing margin for thermal stability.

Parameter Comparison

Engineering Selection Recommendations

The 01C6001JF from Vishay Beyschlag/Draloric/BC Components is the primary equivalent for the obsolete KS602J2. Selection is justified on the following basis:

• Functional Equivalence: Both parts maintain 6kΩ resistance at 25°C and NTC thermistor bead configuration, ensuring direct functional replacement in temperature sensing circuits.
• Regulatory Compliance: The substitute maintains ROHS3 compliance and REACH unaffected status, meeting the same environmental and regulatory requirements as the original part.
• Active Product Status: The 01C6001JF is currently in active production with 715 units in stock, providing supply continuity for the obsolete KS602J2.
• Enhanced Specifications: The substitute offers 100 mW maximum power dissipation compared to 30 mW in the original, providing improved thermal stability and margin in circuit applications.
• Temperature Operating Range: The -40°C to 125°C range of the substitute covers the primary operating window of the original part, with the exception of extreme high-temperature applications above 125°C.

Frequently Asked Questions (FAQ)

Q: Can the 01C6001JF directly replace the KS602J2 in all applications?

A: The 01C6001JF is functionally equivalent for applications operating within -40°C to 125°C. Applications requiring operation above 125°C may require additional thermal analysis. Both parts maintain 6kΩ resistance at 25°C and NTC bead configuration.

Q: What is the difference between B0/50 and B25/75 B-values?

A: B-values describe the temperature response curve of the thermistor. The KS602J2 specifies B0/50 (3892K), while the 01C6001JF provides B25/75 (3964K) and B25/85 (3974K). These values are comparable within typical application tolerances for temperature sensing circuits.

Q: Are there packaging differences between these parts?

A: The KS602J2 uses epoxy bead packaging with free-hanging mounting, while the 01C6001JF uses standard bead packaging with through-hole mounting. Both maintain the bead form factor for mechanical compatibility in most circuit layouts.

Q: Does the higher power rating of the 01C6001JF affect circuit design?

A: The 100 mW maximum power rating of the 01C6001JF exceeds the 30 mW specification of the KS602J2. This provides additional thermal margin and does not negatively impact circuit performance. Existing circuit designs require no modification.

Q: Are both parts RoHS compliant?

A: Yes, both the KS602J2 and 01C6001JF are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.