Honeywell 73JA500 Equivalent & Substitute Parts

Part Overview

The Honeywell 73JA500 is a 500 Ohm, 2W wirewound linear potentiometer designed for panel mount applications with a 10-turn adjustment mechanism and solder lug termination. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The 73JA series has been discontinued, making substitute parts essential for system continuity and component sourcing.

Substiute Parts

73JA500

Honeywell Sensing and Productivity SolutionsIn Stock: 98373JA500 Datasheet

Current PartRFQ

3540S-1-501L

Bourns Inc.In Stock: 9693540S-1-501L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the Honeywell 73JA500 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Resistance value: 500 Ohms
• Power rating: 2W
• Tolerance: ±5%
• Taper characteristic: Linear
• Number of turns: 10
• Resistive material: Wirewound

Mechanical Parameters:

• Termination style: Solder Lug
• Mounting type: Panel Mount
• Bushing thread: 3/8-32
• Actuator type: Slotted
• Body size: Round 0.875" diameter
• Full rotation: 3600°

The Bourns 3540S-1-501L meets all critical electrical and mechanical specifications required for direct substitution. Both parts share identical resistance, power rating, tolerance, taper, turn count, and mechanical mounting characteristics. Differences in temperature coefficient and product status do not affect functional equivalence for standard applications.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 3540S-1-501L is the direct functional equivalent for the obsolete Honeywell 73JA500. Selection of the Bourns substitute is based on the following engineering criteria:

Product Status: The Honeywell 73JA500 is obsolete. The Bourns 3540S-1-501L maintains active production status, ensuring long-term component availability and supply chain continuity.

Electrical Equivalence: Both parts are specified at 500 Ohms, 2W, ±5% tolerance with linear taper and 10-turn wirewound construction. The temperature coefficient difference (±20ppm/°C versus ±50ppm/°C) does not affect substitution eligibility for standard industrial applications operating within normal temperature ranges.

Mechanical Compatibility: Identical mounting specifications, bushing thread size (3/8-32), solder lug termination, and body dimensions ensure direct mechanical interchange without circuit board or mechanical assembly modifications.

Compliance: Both parts meet RoHS requirements. The Bourns part carries ROHS3 compliance and REACH affected status, meeting current regulatory standards for new designs.

Packaging Consideration: The Honeywell part is supplied in bulk packaging, while the Bourns substitute is supplied in tray packaging. This difference does not affect component functionality or electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 3540S-1-501L directly replace the Honeywell 73JA500 without circuit modifications?

A: Yes. Both parts share identical electrical specifications (500 Ohms, 2W, ±5%, linear taper, 10 turns) and mechanical mounting parameters (panel mount, 3/8-32 bushing thread, solder lug termination). Direct substitution is possible without circuit board or mechanical assembly changes.

Q: What is the significance of the temperature coefficient difference between these parts?

A: The Honeywell 73JA500 specifies ±20ppm/°C while the Bourns 3540S-1-501L specifies ±50ppm/°C. For applications operating within standard industrial temperature ranges (-40°C to +85°C), this difference produces negligible resistance variation and does not affect functional equivalence. Applications requiring tighter temperature stability should evaluate specific operating conditions.

Q: Are the physical dimensions identical between these potentiometers?

A: Dimensions are equivalent within manufacturing tolerance. Actuator length differs by 0.001" (0.01mm) and actuator diameter by 0.0003" (0.01mm). Body diameter is identical at 0.875" (22.23mm). These dimensional variations are within standard mechanical tolerance and do not affect panel mount compatibility or mechanical fit.

Q: What is the difference between bulk and tray packaging?

A: Bulk packaging supplies loose components, while tray packaging organizes components in segmented trays for automated assembly equipment. This difference affects handling and assembly processes but does not alter component electrical or mechanical properties. Selection between packaging types depends on production assembly methods.

Q: Why is the Honeywell 73JA500 classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The Bourns 3540S-1-501L, maintained in active production, provides equivalent functionality with assured long-term availability for new designs and production continuity.

Q: Are both parts RoHS compliant?

A: Yes. The Honeywell 73JA500 is RoHS Compliant. The Bourns 3540S-1-501L is ROHS3 Compliant, meeting current regulatory requirements for hazardous substance restrictions in electrical and electronic equipment.