D381N5K Equivalent & Substitute Parts Reference

Part Overview

The D381N5K is a 5k Ohm 2 Gang Linear Panel Mount Potentiometer manufactured by Honeywell Sensing and Productivity Solutions. This component features conductive plastic resistive material, 1W power rating, and solder lug termination for panel-mounted applications. The product is classified as Obsolete, necessitating identification of functionally equivalent alternatives for ongoing system support and new designs requiring similar electrical and mechanical characteristics.

Substiute Parts

D381N5K

Honeywell Sensing and Productivity SolutionsIn Stock: 857D381N5K Datasheet

Current PartRFQ

KKU5021S28

Precision Electronics CorporationIn Stock: 1040KKU5021S28 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the D381N5K is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Resistance value: 5k Ohm (exact match required)
• Tolerance: ±10% (exact match required)
• Taper: Linear (exact match required)
• Number of Gangs: 2 (exact match required)
• Number of Turns: 1 (exact match required)
• Termination Style: Solder Lug (exact match required)

Mechanical Compatibility Requirements:

• Mounting Type: Panel Mount (exact match required)
• Bushing Thread: 1/4-32 (exact match required)

Allowable Variations:

• Power Rating: May exceed 1W (higher power rating acceptable for thermal margin)
• Resistive Material: May differ (conductive plastic or carbon acceptable)
• Rotation: Minor variations acceptable (300° to 314° range acceptable)
• Actuator dimensions: Minor variations acceptable within panel mount constraints
• Body diameter: Minor variations acceptable within panel mount constraints

The substitute part KKU5021S28 meets all critical electrical and mechanical compatibility requirements while providing enhanced power rating and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Bushing Thread Incompatibility

The substitute part KKU5021S28 features a 3/8-32 bushing thread, while the D381N5K uses 1/4-32. This dimensional difference requires mechanical evaluation for panel mounting compatibility. The larger bushing thread of the substitute part may necessitate panel modification or adapter hardware.

Secondary Considerations:

The KKU5021S28 provides superior power rating (2W versus 1W), offering increased thermal margin in applications with variable load conditions. The carbon resistive material differs from the conductive plastic of the original part; both materials are acceptable for linear potentiometer applications with equivalent electrical performance at the specified resistance and tolerance values.

The substitute part maintains active product status with current manufacturing availability (931 Pcs in stock), ensuring long-term supply chain reliability compared to the obsolete D381N5K (757 Pcs remaining inventory).

Both parts maintain equivalent compliance certifications (RoHS and REACH), supporting regulatory requirements for electronic component applications.

Substitution Feasibility: Electrical and functional substitution is valid. Mechanical integration requires verification of panel mounting geometry, specifically bushing thread compatibility and body diameter accommodation.

Frequently Asked Questions (FAQ)

Q: Can KKU5021S28 directly replace D381N5K without modification?

A: Electrical substitution is valid. Mechanical substitution requires panel mounting verification. The different bushing thread size (3/8-32 versus 1/4-32) and larger body diameter (1.120" versus 0.625") necessitate assessment of panel hole dimensions and mounting hardware compatibility.

Q: Why does the substitute part have higher power rating (2W versus 1W)?

A: Higher power rating provides thermal margin and does not compromise functionality. The 2W rating of KKU5021S28 exceeds the 1W requirement of D381N5K, allowing operation with greater current capacity without performance degradation.

Q: Are conductive plastic and carbon resistive materials interchangeable?

A: Both materials are acceptable for linear potentiometer applications at the specified 5k Ohm resistance and ±10% tolerance. Material selection does not affect electrical performance for this application category.

Q: What is the significance of the rotation angle difference (300° versus 314°)?

A: The 14° difference represents a minor variation within acceptable mechanical tolerances for single-turn potentiometers. Both rotation specifications support equivalent functional performance in user-defined adjustment applications.

Q: Is the larger actuator diameter (0.249" versus 0.125") a concern?

A: Actuator diameter variation is acceptable provided the control knob or adjustment mechanism accommodates the larger diameter. Panel cutout and mechanical interface compatibility must be verified during integration.

Q: Why is product status (Obsolete versus Active) important for substitution?

A: Active product status ensures ongoing manufacturing availability and supply chain continuity. The D381N5K obsolete status limits future procurement options, making the active KKU5021S28 preferable for new designs and long-term system support.

Q: Are both parts RoHS compliant?

A: Yes. D381N5K is RoHS Compliant, and KKU5021S28 is ROHS3 Compliant. Both meet current environmental and regulatory requirements for electronic component applications.