Honeywell 73JA100 Wirewound Potentiometer - Equivalent & Substitute Parts

Part Overview

The Honeywell 73JA100 is a 100 Ohm, 2-watt wirewound linear potentiometer designed for panel mount applications with a 10-turn adjustment mechanism and solder lug termination. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system maintenance, repair, and new design implementations where legacy component specifications must be maintained.

Substiute Parts

73JA100

Honeywell Sensing and Productivity SolutionsIn Stock: 92073JA100 Datasheet

Current PartRFQ

3540S-1-101L

Bourns Inc.In Stock: 9933540S-1-101L Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete Honeywell 73JA100 is based on strict electrical and mechanical parameter matching. The following criteria determine functional equivalence:

Electrical Parameters (Must Match):

• Resistance value: 100 Ohms
• Power rating: 2W minimum
• Taper type: Linear
• Number of turns: 10
• Tolerance: ±5% or better
• Resistive material: Wirewound

Mechanical Parameters (Must Match):

• Termination style: Solder Lug
• Mounting type: Panel Mount
• Bushing thread: 3/8-32
• Body diameter: 0.875" (22.23mm)
• Actuator type: Slotted
• Rotation: 3600° (10 turns × 360°)

Compliance Parameters (Should Match or Exceed):

• RoHS compliance status
• ECCN classification
• HTSUS code

The Bourns 3540S-1-101L meets all critical electrical and mechanical parameters, establishing it as a direct functional equivalent for the obsolete Honeywell 73JA100.

Parameter Comparison

Engineering Selection Recommendations

The Bourns 3540S-1-101L is the direct functional equivalent for the obsolete Honeywell 73JA100 based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match exactly, including resistance value, power rating, tolerance, number of turns, taper type, and resistive material composition. The temperature coefficient of the Bourns substitute (±50ppm/°C) is wider than the original (±20ppm/°C), which represents a minor performance difference acceptable for most applications where the original component was specified.

Mechanical Compatibility: Physical dimensions and mounting specifications are functionally identical. The actuator length and diameter differences are within 0.001 inches and 0.0003 inches respectively, representing manufacturing tolerances that do not affect mechanical fit or panel compatibility. The 3/8-32 bushing thread and 0.875-inch body diameter ensure direct panel mount compatibility without modification.

Compliance Status: The Bourns 3540S-1-101L maintains RoHS compliance (ROHS3 standard) and shares identical ECCN and HTSUS classifications with the original component, ensuring regulatory and trade compliance equivalence.

Product Status Advantage: The Bourns substitute is classified as Active product status, ensuring continued availability and supply chain reliability compared to the obsolete Honeywell component.

Frequently Asked Questions (FAQ)

Q: Can the Bourns 3540S-1-101L be used as a direct replacement for the Honeywell 73JA100 in existing designs?

A: Yes. The Bourns 3540S-1-101L meets all critical electrical and mechanical specifications. The component can be substituted without circuit redesign or mechanical modification. The slightly wider temperature coefficient (±50ppm/°C versus ±20ppm/°C) should be evaluated only if the application operates in extreme temperature environments where the original ±20ppm/°C specification was critical to system performance.

Q: Are there any dimensional differences that would affect panel mounting?

A: No. The body diameter (0.875 inches), bushing thread (3/8-32), and mounting type (panel mount) are identical. Actuator dimensions differ by less than 0.001 inches, which is within standard manufacturing tolerances and does not affect mechanical fit or operation.

Q: What is the significance of the temperature coefficient difference?

A: The Honeywell 73JA100 has a temperature coefficient of ±20ppm/°C, while the Bourns 3540S-1-101L has ±50ppm/°C. This means the Bourns substitute's resistance value will drift slightly more with temperature changes. For applications operating within standard industrial temperature ranges (-40°C to +85°C), this difference is typically negligible. Applications requiring precision at temperature extremes should evaluate this parameter against specific system requirements.

Q: Is the Bourns component RoHS compliant?

A: Yes. The Bourns 3540S-1-101L is ROHS3 compliant, meeting current RoHS standards. The original Honeywell component was RoHS compliant, and the substitute maintains or exceeds this compliance level.

Q: What is the difference between the packaging specifications?

A: The Honeywell 73JA100 is listed with "-" packaging notation, while the Bourns 3540S-1-101L is supplied in Bulk packaging. Both are individual potentiometer units suitable for direct component installation. Bulk packaging indicates standard commercial packaging without special protective measures, appropriate for normal handling and storage conditions.

Q: Are there inventory considerations for component selection?

A: The Honeywell 73JA100 has 822 pieces in stock as new original inventory. The Bourns 3540S-1-101L has 945 pieces in stock. Both components are currently available. However, the Honeywell component is obsolete, making future availability uncertain. The Bourns substitute is active product status, ensuring long-term supply chain reliability.

Q: Can the Bourns 3540S-1-101L be used in new designs?

A: Yes. The Bourns 3540S-1-101L is the recommended component for new designs requiring a 100 Ohm, 2-watt, 10-turn wirewound linear potentiometer with panel mount configuration. Active product status ensures design continuity and supply chain support throughout the product lifecycle.