KT602J2 Equivalent & Substitute Parts

Part Overview

The KT602J2 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 applications and new designs. The part operates at a maximum temperature of 120°C with a power rating of 30 mW and features 1.50" lead wire length for free-hanging mounting configurations.

Substiute Parts

KT602J2

Littelfuse Inc.In Stock: 869KT602J2 Datasheet

Current PartRFQ

01C6001JF

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KT602J2 is based on the following critical parameters:

Primary Matching Criteria:

• Resistance value at 25°C: 6kΩ
• Thermistor type: NTC (Negative Temperature Coefficient)
• Package type: Bead configuration
• B-value characteristics within acceptable thermal response range
• RoHS3 compliance and REACH unaffected status
• Operating temperature range compatibility

Substitution Logic: The 01C6001JF qualifies as an equivalent substitute based on matching the 6kΩ resistance specification at 25°C and maintaining NTC thermistor functionality in bead form. Both components share identical RoHS3 compliance and REACH unaffected status. The substitute operates across an extended temperature range (-40°C to 125°C) compared to the KT602J2 (120°C maximum), providing broader application flexibility. B-value measurements (B25/75: 3964K, B25/85: 3974K) remain within acceptable thermal response parameters for NTC thermistor applications.

Parameter Comparison

Engineering Selection Recommendations

01C6001JF Selection Basis:

The 01C6001JF from Vishay Beyschlag/Draloric/BC Components is the designated equivalent substitute for the obsolete KT602J2. Selection is justified on the following engineering grounds:

• Electrical Equivalence: Both components maintain 6kΩ resistance at 25°C, ensuring direct functional replacement in temperature sensing circuits.
• Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental and regulatory requirements.
• Product Availability: The 01C6001JF holds active product status with current inventory availability, whereas the KT602J2 is obsolete.
• Thermal Performance: The substitute's extended operating range (-40°C to 125°C) encompasses the original part's maximum operating temperature, providing compatibility across the full intended application envelope.
• Power Rating Enhancement: The 01C6001JF's 100 mW power rating exceeds the KT602J2's 30 mW specification, offering improved thermal dissipation capability.

Mounting Consideration: The transition from free-hanging to through-hole mounting requires circuit board layout verification to ensure mechanical compatibility with existing designs.

Frequently Asked Questions (FAQ)

Q: Can the 01C6001JF directly replace the KT602J2 in existing circuits?

A: Yes, the 01C6001JF provides electrical equivalence based on matching 6kΩ resistance at 25°C and NTC thermistor characteristics. Mounting type differs (through-hole versus free-hanging), requiring mechanical design verification.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution is determined by resistance value at 25°C (6kΩ), thermistor type (NTC), package configuration (bead), B-value thermal response characteristics, and regulatory compliance status (RoHS3, REACH).

Q: Does the 01C6001JF operate within the same temperature range as the KT602J2?

A: The 01C6001JF operates across -40°C to 125°C, which encompasses the KT602J2's 120°C maximum operating temperature. The substitute provides extended low-temperature capability.

Q: Are there differences in power dissipation between these components?

A: Yes. The KT602J2 is rated at 30 mW maximum power, while the 01C6001JF is rated at 100 mW. The substitute offers higher power dissipation capability.

Q: What packaging differences exist between the KT602J2 and 01C6001JF?

A: The KT602J2 features epoxy bead packaging with 1.50" lead wire length for free-hanging mounting. The 01C6001JF uses bead packaging configured for through-hole mounting. Lead wire length specifications are not provided for the substitute.

Q: Are both components RoHS3 compliant?

A: Yes, both the KT602J2 and 01C6001JF maintain ROHS3 compliance and REACH unaffected status, satisfying current environmental regulations.