TE Connectivity Measurement Specialties 055111 NTC Thermistor Equivalent & Substitute Parts

Part Overview

The TE Connectivity Measurement Specialties 055111 is an NTC thermistor with a nominal resistance of 30kΩ at 25°C and a B-value of 3943K. This component is classified as a temperature sensor in bead package configuration and is designed for free-hanging mounting applications. The part maintains Active product status and is ROHS3 compliant. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

055111

TE Connectivity Measurement SpecialtiesIn Stock: 787055111 Datasheet

Current PartRFQ

NTCLE213E3303FHB0

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 3650NTCLE213E3303FHB0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for NTC thermistor components is determined by alignment across the following critical parameters:

Resistance Value: Both the main part and substitute must maintain the same nominal resistance at 25°C (30kΩ). This parameter directly affects circuit impedance and measurement accuracy in temperature sensing applications.

B-Value Characteristic: The B-value determines the thermistor's temperature coefficient and thermal response curve. The main part specifies B25/85 = 3943K, while the substitute part specifies B25/85 = 3935K. The difference of 8K represents a 0.2% variance, which falls within acceptable substitution tolerance for general temperature sensing applications where precise thermal matching is not critical.

Operating Temperature Range: The main part operates from -40°C to 150°C. The substitute part extends the lower operating limit to -55°C, providing a wider functional envelope while maintaining the upper limit at 150°C. This extended range does not restrict substitution; it expands application capability.

Package Configuration: Both parts are supplied in bead package format with free-hanging mounting type, ensuring mechanical and installation compatibility.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying current environmental and hazardous substance regulations.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (TE Connectivity 055111): Select this part when the application requires the tighter B-value tolerance specification of ±0.4% and resistance tolerance of ±0.1°C. This part is suitable for applications operating within the -40°C to 150°C range where the narrower tolerance band provides enhanced thermal measurement precision.

Substitute Part (Vishay NTCLE213E3303FHB0): This part is functionally equivalent for applications where the operating temperature range extends below -40°C, as it supports operation down to -55°C. The substitute maintains ROHS3 and REACH compliance, ensuring regulatory alignment. The B-value variance of 0.2% and wider tolerance specifications (±1% resistance, ±0.75% B-value) are acceptable for general temperature sensing applications where measurement precision requirements are less stringent than the primary part.

Both parts are Active status components with established supply availability, supporting long-term design continuity.

Frequently Asked Questions (FAQ)

Q: Can the Vishay NTCLE213E3303FHB0 directly replace the TE Connectivity 055111 in existing designs?

A: Yes, the Vishay part is a functional substitute. Both components share identical 30kΩ resistance at 25°C, bead package configuration, and free-hanging mounting type. The B-value difference of 8K (0.2% variance) and extended operating temperature range do not restrict substitution for standard temperature sensing applications. However, designs requiring the tighter tolerance specifications of the primary part should be evaluated for impact.

Q: What is the significance of the B-value difference between these parts?

A: The B-value determines the thermistor's temperature coefficient and thermal response curve. The main part specifies B25/85 = 3943K while the substitute specifies B25/85 = 3935K. This 8K difference represents a 0.2% variance in the thermal characteristic. For applications requiring precise temperature measurement across a wide range, this variance may introduce minor calibration adjustments but does not prevent substitution.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts maintain identical ROHS3 compliance and REACH Unaffected status. Both are classified under the same HTSUS code (8533.40.8070) and ECCN (EAR99), ensuring regulatory equivalence for procurement and export purposes.

Q: What are the tolerance differences, and how do they affect circuit performance?

A: The TE Connectivity 055111 specifies ±0.1°C resistance tolerance and ±0.4% B-value tolerance. The Vishay substitute specifies ±1% resistance tolerance and ±0.75% B-value tolerance. The primary part offers tighter tolerance control, which is beneficial for applications requiring high measurement accuracy. The substitute's wider tolerances are acceptable for general temperature sensing where measurement precision requirements are moderate.

Q: Does the extended operating temperature range of the Vishay part affect substitution suitability?

A: No. The Vishay part extends the lower operating limit to -55°C compared to the primary part's -40°C minimum. This expanded range does not restrict substitution; it provides additional capability for applications requiring operation at lower temperatures. Both parts maintain the same 150°C upper operating limit.

Q: Are the lead wire specifications different between these parts?

A: The TE Connectivity 055111 does not specify lead wire length. The Vishay NTCLE213E3303FHB0 specifies a lead wire length of 1.22" (31.00mm). Both parts are supplied in free-hanging bead configuration, suitable for direct insertion into circuit assemblies.