Honeywell 308N5K Potentiometer - Equivalent & Substitute Parts

Part Overview

The Honeywell 308N5K is a 5k Ohm, 1/2W linear panel mount potentiometer featuring conductive plastic resistive material and solder hook termination. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing procurement and design applications. The 308N series represents a legacy potentiometer design with specific mechanical and electrical characteristics that require careful matching when sourcing alternatives.

Substiute Parts

308N5K

Honeywell Sensing and Productivity SolutionsIn Stock: 645308N5K Datasheet

Current PartRFQ

53CAA-E28-B13L

Bourns Inc.In Stock: 78353CAA-E28-B13L Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell 308N5K is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Resistance value: 5k Ohm (exact match required)
• Power rating: 0.5W, 1/2W (exact match required)
• Taper characteristic: Linear (exact match required)
• Number of gangs: 1 (exact match required)
• Number of turns: 1.0 (exact match required)
• Resistive material: Conductive Plastic (exact match required)
• Mounting configuration: Panel Mount (exact match required)
• Bushing thread: 1/4-32 (exact match required)

Allowable Variation Parameters:

• Tolerance: ±10% to ±20% (within acceptable circuit design margins)
• Rotation angle: 290° to 295° (minor mechanical variation)
• Actuator length: 0.750" to 0.875" (panel depth dependent)
• Body dimensions: Minor rectangular/square variations acceptable
• Termination style: Solder Hook or Solder Lug (both acceptable for circuit integration)
• Product status: Active preferred over obsolete for supply chain continuity

The Bourns 53CAA-E28-B13L satisfies all critical matching parameters and represents an active equivalent suitable for direct substitution in applications where the 308N5K is no longer available.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 53CAA-E28-B13L is the designated equivalent for the obsolete Honeywell 308N5K based on the following engineering criteria:

Product Status Advantage: The 53CAA-E28-B13L maintains active product status with established supply chain availability (717 pcs in stock), eliminating procurement risk associated with the obsolete 308N5K (609 pcs remaining inventory).

Compliance Alignment: Both components maintain equivalent regulatory compliance. The 308N5K is RoHS Compliant, while the 53CAA-E28-B13L achieves ROHS3 Compliant status, representing enhanced environmental standards. Both components carry identical ECCN (EAR99) and HTSUS (8533.40.8070) classifications.

Electrical Equivalence: All critical electrical parameters align exactly: 5k Ohm resistance, 0.5W/1/2W power rating, linear taper, single gang, single turn, and conductive plastic construction. The tolerance variance (±10% to ±20%) remains within acceptable circuit design margins for typical potentiometer applications.

Mechanical Compatibility: Panel mount configuration, 1/4-32 bushing thread, and 0.125" actuator diameter are identical. The 5° rotation angle difference (295° vs. 290°) and minor actuator length variation (0.750" vs. 0.875") are mechanically compatible with standard panel cutout specifications. Termination style difference (Solder Hook vs. Solder Lug) requires PCB layout verification but does not prevent functional substitution.

Sealed Design Feature: The 53CAA-E28-B13L incorporates sealed construction, providing enhanced environmental protection compared to the 308N5K, representing a design improvement for applications requiring moisture resistance.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 53CAA-E28-B13L directly replace the Honeywell 308N5K in existing designs?

A: Direct substitution is supported for all electrical and mechanical functions. The identical resistance value (5k Ohm), power rating (0.5W/1/2W), linear taper, panel mount configuration, and 1/4-32 bushing thread ensure functional compatibility. PCB layout modification may be required due to termination style change (Solder Hook to Solder Lug), but this represents a standard design update rather than a functional limitation.

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

A: The 308N5K specifies ±10% tolerance, while the 53CAA-E28-B13L specifies ±20% tolerance. For most potentiometer applications, this variance remains within acceptable circuit design margins. Applications requiring tighter tolerance control should evaluate circuit sensitivity to the additional ±10% tolerance band before substitution.

Q: Does the 5° rotation angle difference (295° vs. 290°) affect mechanical operation?

A: The rotation angle difference is mechanically compatible with standard panel mount applications. Both angles provide full-range adjustment capability within typical potentiometer usage patterns. Applications with specific mechanical stop requirements should verify that the 290° rotation of the 53CAA-E28-B13L accommodates the intended adjustment range.

Q: What is the impact of the actuator length difference (0.750" vs. 0.875")?

A: The 0.875" actuator length of the 53CAA-E28-B13L is 0.125" longer than the 308N5K. This difference is compatible with standard panel depths but requires verification that the panel thickness and knob clearance accommodate the extended actuator. This represents a minor mechanical consideration rather than a functional incompatibility.

Q: Are there supply chain advantages to selecting the 53CAA-E28-B13L?

A: The 53CAA-E28-B13L maintains active product status with 717 pcs in current inventory, compared to the 308N5K obsolete status with limited remaining stock (609 pcs). Active product status ensures long-term availability, established distribution channels, and predictable lead times, providing significant supply chain advantages for ongoing production requirements.

Q: Does the sealed design of the 53CAA-E28-B13L provide additional benefits?

A: The sealed construction of the 53CAA-E28-B13L provides enhanced environmental protection against moisture ingress and contamination compared to the unsealed 308N5K. This feature represents a design improvement for applications exposed to humidity, condensation, or harsh environmental conditions, though it does not affect electrical performance in standard operating environments.

Q: What packaging considerations apply to the 53CAA-E28-B13L?

A: The 53CAA-E28-B13L is supplied in Tray packaging, compared to the 308N5K standard packaging. Tray packaging is compatible with standard component handling and storage procedures. Procurement and inventory management processes should account for the tray format in receiving and storage workflows.