ERT-D2FGL171S NTC Thermistor Equivalent & Substitute Parts

Part Overview

The ERT-D2FGL171S is an NTC thermistor manufactured by Panasonic Electronic Components, designed for temperature sensing applications requiring a 170Ω resistance at 25°C with a B25/50 value of 3700K. This component features a 5mm disc package with through-hole mounting and operates across a -30°C to 60°C temperature range with a maximum power dissipation of 400mW.

The ERT-D2FGL171S is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this thermistor.

Substiute Parts

ERT-D2FGL171S

Panasonic Electronic ComponentsIn Stock: 779ERT-D2FGL171S Datasheet

Current PartRFQ

MF11-0017010

CanthermIn Stock: 867MF11-0017010 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for NTC thermistors is determined by the following critical parameters:

Primary Matching Criteria:

• Resistance value at 25°C: Must be 170Ω
• Mounting type: Must be through-hole compatible
• Package form factor: Disc configuration

Secondary Compatibility Factors:

• B25/50 thermal coefficient: Acceptable variance based on application tolerance
• Operating temperature range: Substitute must encompass or exceed the original operating window
• Power dissipation rating: Substitute must meet or exceed the original specification
• Resistance tolerance: Substitute tolerance must be compatible with circuit design requirements

The MF11-0017010 from Cantherm meets the primary matching criteria with identical 170Ω resistance at 25°C and through-hole disc mounting. While the B25/50 value differs (3000K vs. 3700K), this represents a measurable thermal characteristic variation that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

ERT-D2FGL171S Status: Obsolete. Original manufacturer supply is no longer available through standard distribution channels.

MF11-0017010 Suitability: The Cantherm MF11-0017010 provides functional equivalence for applications requiring 170Ω NTC thermistor characteristics. Key advantages include active product status, extended operating temperature range (-55°C to 125°C vs. -30°C to 60°C), increased power dissipation capability (500mW vs. 400mW), and improved resistance tolerance (±10% vs. ±15%).

Critical Consideration: The B25/50 thermal coefficient differs between parts (3000K vs. 3700K). This variation affects the thermistor's temperature-to-resistance response curve. Applications with strict thermal response requirements must validate that the 3000K characteristic remains within acceptable circuit performance parameters.

Compliance: The MF11-0017010 carries RoHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

Frequently Asked Questions (FAQ)

Q: Can the MF11-0017010 be used as a direct replacement for the ERT-D2FGL171S?

A: Both components share identical 170Ω resistance at 25°C and through-hole disc mounting configuration. However, the B25/50 thermal coefficient differs (3000K vs. 3700K). Direct substitution is viable only when the application's thermal response tolerance accommodates this characteristic variation. Circuit-level validation is required.

Q: What is the significance of the B25/50 value difference?

A: The B25/50 value defines the thermistor's thermal sensitivity—how resistance changes with temperature. A lower B value (3000K) indicates a gentler resistance change across the operating range compared to a higher B value (3700K). Applications using these components for precise temperature measurement or control must account for this difference in calibration and response characteristics.

Q: Are there physical mounting differences between these parts?

A: Both components feature through-hole mounting with disc packages. The MF11-0017010 has a slightly larger diameter (6.5mm vs. 5mm). PCB layout and mechanical clearance must be verified to ensure the larger package fits within the available space.

Q: Does the MF11-0017010 meet current regulatory standards?

A: Yes. The MF11-0017010 is RoHS3 compliant and REACH unaffected, meeting current electronic component procurement regulations. The obsolete ERT-D2FGL171S does not carry current compliance certifications.

Q: What is the impact of the improved resistance tolerance on circuit performance?

A: The MF11-0017010 offers ±10% tolerance compared to the ERT-D2FGL171S at ±15%. Tighter tolerance reduces initial resistance variation, potentially improving circuit accuracy and reducing calibration requirements. This is advantageous for applications sensitive to component-to-component variation.