Equivalent & Substitute Parts for Vishay Dale 01C1002FF NTC Thermistor

Part Overview

The Vishay Dale 01C1002FF is an NTC thermistor with 10kΩ resistance at 25°C, packaged as a bead with free-hanging leads. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. The KYOCERA AVX NJ28MA0103F-- serves as the manufacturer-recommended substitute, offering equivalent electrical performance with enhanced operating temperature range and active product status.

Key Parameters

Parameter	Value	Significance for Substitution
Resistance @ 25°C	10kΩ	Primary electrical specification; must match exactly
Resistance Tolerance	±1%	Defines acceptable resistance variation; substitute must meet or exceed
Operating Temperature Range	0°C ~ 70°C (main); -55°C ~ 150°C (substitute)	Determines application suitability; substitute provides wider range
Package Type	Bead (main); Disc 2.8mm (substitute)	Affects mechanical fit and mounting; physical differences require board redesign
Lead Length	1.42" (36mm) main; 1.38" (35mm) substitute	Minor variation; functionally equivalent for through-hole applications
RoHS Status	ROHS3 Compliant (both)	Regulatory compliance; both parts meet requirements
Product Status	Not For New Designs (main); Active (substitute)	Substitute recommended for new designs and long-term availability

Substitute Part Grouping Explanation

The KYOCERA AVX NJ28MA0103F-- qualifies as a direct electrical substitute based on the following criteria:

Resistance Match: Both parts specify 10kΩ at 25°C with ±1% tolerance
Tolerance Alignment: Substitute meets the ±1% tolerance requirement
Regulatory Compliance: Both parts are ROHS3 compliant and REACH unaffected
Lead Configuration: Both use through-hole mounting with comparable lead lengths (35mm vs 36mm)

The primary substitution constraint is the package form factor change from bead to disc (2.8mm diameter), which requires mechanical board-level evaluation but does not affect electrical performance.

Parameter Comparison

Parameter	Vishay Dale 01C1002FF	KYOCERA AVX NJ28MA0103F--	Compatibility
Resistance @ 25°C	10kΩ	10kΩ	Exact Match
Resistance Tolerance	±1%	±1%	Exact Match
B Value Tolerance	Not specified	±0.5%	Substitute provides tighter specification
Operating Temperature	0°C ~ 70°C	-55°C ~ 150°C	Substitute covers wider range
Power Rating	Not specified	16 mW max	Substitute provides defined rating
Lead Length	1.42" (36mm)	1.38" (35mm)	Functionally equivalent (1mm difference)
Package Type	Bead	Disc, 2.8mm Dia x 2.8mm W	Different form factor; board redesign required
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Exact Match
Product Status	Not For New Designs	Active	Substitute recommended for new designs

Engineering Selection Recommendations

The KYOCERA AVX NJ28MA0103F-- is the manufacturer-recommended substitute for the Vishay Dale 01C1002FF based on the following engineering criteria:

Electrical Equivalence: Both parts deliver 10kΩ resistance at 25°C with ±1% tolerance, ensuring circuit performance parity
Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements
Product Lifecycle: The substitute is active and suitable for new designs, whereas the original part is end-of-life
Enhanced Specifications: The substitute provides a wider operating temperature range (-55°C to 150°C versus 0°C to 70°C) and defined power rating (16 mW), offering greater application flexibility
Mechanical Consideration: The package change from bead to disc requires board-level layout verification but does not impact electrical function

Selection of the substitute is appropriate for applications requiring long-term component availability and compliance with current design standards.

Frequently Asked Questions (FAQ)

Q: Can the KYOCERA AVX NJ28MA0103F-- be used as a direct drop-in replacement for the Vishay Dale 01C1002FF?

A: Electrically, yes. Both parts specify 10kΩ at 25°C with ±1% tolerance and identical regulatory compliance. However, the package form factor differs (bead versus disc), requiring mechanical board redesign. The lead lengths are nearly identical (1mm difference), so through-hole mounting compatibility depends on PCB hole spacing and component placement.

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

A: Substitution is based on: (1) resistance value and tolerance match, (2) operating temperature range suitability for the application, (3) regulatory compliance alignment, and (4) mechanical compatibility with board layout. The substitute meets all electrical criteria and exceeds temperature range requirements.

Q: Why is the substitute recommended over the original part?

A: The original Vishay Dale part is classified "Not For New Designs," indicating end-of-life status. The KYOCERA AVX substitute is active, offers wider operating temperature range, provides defined power rating, and ensures long-term availability for production and support.

Q: Are there any performance differences between the two parts?

A: Electrically, both parts are equivalent at the specified 10kΩ resistance and tolerance. The substitute provides additional specifications (B value tolerance of ±0.5% and 16 mW power rating) and a significantly wider operating temperature range, making it suitable for more demanding applications.

Q: What board-level changes are required to use the substitute?

A: The primary change is the package form factor: the substitute uses a disc package (2.8mm diameter × 2.8mm width) instead of a bead. PCB footprint, hole spacing, and component placement must be verified and potentially redesigned. Lead length difference (1mm) is negligible for standard through-hole applications.

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