Equivalent & Substitute Parts for Honeywell 175-103LAE-301

Part Overview

The Honeywell 175-103LAE-301 is an NTC thermistor with 10kΩ resistance at 25°C, packaged in 1206 (3216 Metric) surface mount format. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design and procurement requirements. The part operates across a temperature range of -60°C to 125°C and meets RoHS compliance standards.

Substiute Parts

175-103LAE-301

Honeywell Sensing and Productivity SolutionsIn Stock: 1088175-103LAE-301 Datasheet

Current PartRFQ

B57621C5103J062

EPCOS - TDK ElectronicsIn Stock: 16536B57621C5103J062 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for NTC thermistors is determined by the following criteria:

Primary Matching Criteria:

• Resistance value at 25°C: 10kΩ (exact match required)
• Package / Case: 1206 (3216 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)

Secondary Compatibility Criteria:

• Operating temperature range must encompass or equal the original specification
• B value tolerance and thermal characteristics must be compatible with circuit design parameters
• RoHS compliance status must meet or exceed the original specification

The EPCOS B57621C5103J062 meets all primary matching criteria. Secondary parameters show variations in B value specification (B25/50: 3470K versus B0/50: 3887K) and tolerance ranges, which require circuit-level evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

EPCOS B57621C5103J062 as Primary Substitute:

The EPCOS B57621C5103J062 is suitable as a direct substitute based on matching primary electrical and mechanical specifications: identical 10kΩ resistance at 25°C, identical 1206 surface mount package, and compatible operating temperature range. The part is currently in active production status with 16,526 units in stock, ensuring supply chain continuity.

Compliance Considerations:

Both parts meet RoHS requirements. The EPCOS part carries ROHS3 compliance and REACH Unaffected status, providing enhanced regulatory documentation for applications requiring extended compliance verification.

Parameter Variance Considerations:

The substitute exhibits wider tolerance specifications (±5% resistance tolerance versus ±3%, and ±3% B value tolerance versus ±1.3%). The operating temperature minimum is -55°C versus -60°C for the original part. These differences require evaluation within the specific circuit application to confirm functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can the EPCOS B57621C5103J062 be used as a direct drop-in replacement?

A: Physical and electrical compatibility is confirmed for the primary specifications: 10kΩ resistance, 1206 package, and surface mount configuration. However, the wider tolerance ranges and different B value specification require circuit-level verification to ensure the application tolerates these parameter variations.

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

A: The B value determines the thermistor's temperature coefficient and thermal response curve. The original part specifies B0/50: 3887K, while the substitute specifies B25/50: 3470K. These represent different measurement reference points and values. The substitute's B value tolerance of ±3% is wider than the original's ±1.3%, which may affect temperature measurement accuracy in precision applications.

Q: Does the operating temperature range difference affect compatibility?

A: The substitute's minimum operating temperature is -55°C compared to the original's -60°C. If the application requires operation below -55°C, the substitute is not suitable. For applications within -55°C to 125°C, the substitute is compatible.

Q: Are there packaging differences between these parts?

A: Both parts use identical 1206 (3216 Metric) surface mount packaging. The EPCOS part is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. No PCB footprint or assembly process modifications are required.

Q: What compliance certifications should I verify for my application?

A: Both parts are RoHS compliant. The EPCOS part carries ROHS3 certification and REACH Unaffected status. Verify these certifications against your specific application and regional requirements before final selection.