308NPC10K Equivalent & Substitute Parts Reference

Part Overview

The Honeywell Sensing and Productivity Solutions 308NPC10K is a 10k Ohm 1/2W conductive plastic linear panel mount potentiometer with PC pin termination. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system maintenance and new design implementations. The 308NPC series has been discontinued, necessitating evaluation of active alternative components that maintain functional compatibility with existing applications.

Substiute Parts

308NPC10K

Honeywell Sensing and Productivity SolutionsIn Stock: 1158308NPC10K Datasheet

Current PartRFQ

51CAD-E24-B15L

Bourns Inc.In Stock: 104351CAD-E24-B15L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 308NPC10K is based on strict alignment of the following critical parameters:

Mandatory Matching Parameters:

• Resistance value: 10k Ohm (exact match required)
• Power rating: 0.5W / 1/2W minimum
• Taper characteristic: Linear response
• Resistive material: Conductive plastic construction
• Termination: PC pins for direct PCB mounting
• Mounting configuration: Panel mount with 1/4-32 bushing thread
• Rotation specification: Single turn (1.0 Kierros)

Compatible Variation Parameters:

• Tolerance: Substitute tolerance may differ from ±10% specification
• Body dimensions: Minor variations acceptable within panel mounting constraints
• Temperature coefficient: Substitute specifications may vary
• Rotation angle: Slight variations (290° to 295°) acceptable for single-turn applications
• Product status: Active status preferred for long-term availability

The Bourns Inc. 51CAD-E24-B15L meets all mandatory matching criteria while offering active product status and enhanced sealing features.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: Bourns Inc. 51CAD-E24-B15L

The 51CAD-E24-B15L is the qualified equivalent for 308NPC10K replacement applications. Selection rationale:

1. Functional Equivalence: All critical electrical parameters match exactly (10k Ohm resistance, 0.5W/1/2W power rating, linear taper, conductive plastic material, PC pin termination).

2. Mechanical Compatibility: Panel mount configuration, 1/4-32 bushing thread, slotted actuator type, and actuator dimensions (0.750" length, 0.125" diameter) provide direct mechanical compatibility with existing panel installations.

3. Product Status: Active manufacturing status ensures long-term availability and supply chain continuity, addressing the obsolescence of the 308NPC10K.

4. Regulatory Compliance: ROHS3 compliance and REACH affected status meet current environmental and regulatory requirements. Both components share identical ECCN (EAR99) and HTSUS (8533.40.8070) classifications.

5. Minor Parameter Variations: The 51CAD-E24-B15L tolerance specification (±20% versus ±10%) and sealed feature represent acceptable variations for most applications. Rotation angle difference (290° versus 295°) is negligible for single-turn potentiometer applications.

6. Physical Dimensions: Minor body size variation (rectangular 0.521" x 0.492" versus square 0.500" x 0.500") remains within typical panel mounting tolerances and does not preclude installation.

Frequently Asked Questions (FAQ)

Q: Can the 51CAD-E24-B15L directly replace the 308NPC10K without PCB modifications?

A: Yes. Both components feature identical PC pin termination, 1/4-32 bushing thread, and panel mount configuration. Direct substitution is possible without PCB layout changes.

Q: What is the significance of the tolerance difference (±10% versus ±20%)?

A: The 308NPC10K specifies ±10% tolerance while the 51CAD-E24-B15L specifies ±20%. For applications requiring tighter tolerance control, the wider tolerance of the substitute must be evaluated against circuit requirements. Both components meet the 10k Ohm nominal specification.

Q: Are the minor body dimension differences problematic?

A: The 51CAD-E24-B15L rectangular body (0.521" x 0.492") versus the 308NPC10K square body (0.500" x 0.500") represents a 0.021" and 0.008" increase respectively. These variations fall within standard panel mounting tolerances and do not affect functional compatibility.

Q: What does the "Sealed" feature on the 51CAD-E24-B15L provide?

A: The sealed construction of the 51CAD-E24-B15L offers enhanced environmental protection compared to the 308NPC10K. This feature improves resistance to moisture and contaminants without affecting electrical performance or mechanical compatibility.

Q: Is the 290° rotation of the 51CAD-E24-B15L equivalent to the 295° rotation of the 308NPC10K?

A: For single-turn potentiometer applications, the 5° difference is functionally negligible. Both components provide single-turn (1.0 Kierros) operation suitable for standard panel control applications.

Q: Why is the 51CAD-E24-B15L preferred over the obsolete 308NPC10K?

A: The 51CAD-E24-B15L maintains active manufacturing status, ensuring ongoing availability and supply chain reliability. The 308NPC10K obsolete status creates sourcing risk and limits long-term component availability for maintenance and new production runs.

Q: Are there any compliance differences between these components?

A: Both components are RoHS compliant (308NPC10K: RoHS Compliant; 51CAD-E24-B15L: ROHS3 Compliant). The 51CAD-E24-B15L additionally carries REACH Affected status. Both share identical ECCN and HTSUS classifications, indicating equivalent regulatory treatment.

Q: What is the temperature coefficient specification for the 51CAD-E24-B15L?

A: The 51CAD-E24-B15L specifies ±1000ppm/°C temperature coefficient. The 308NPC10K does not provide this specification. For temperature-sensitive applications, this parameter should be evaluated against circuit requirements.