Honeywell 485000M8990 Equivalent & Substitute Parts

Part Overview

The Honeywell 485000M8990 is a 5k Ohm 2W linear panel mount potentiometer with conductive plastic resistive material and solder lug termination. This component is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system maintenance and new design implementations. The part features a 1-gang configuration with 312° rotation and is housed in a round body measuring 1.094" diameter with 3/8-32 bushing thread for panel mounting.

Key Parameters

Parameter	Value
Resistance	5k Ohm
Power Rating	2W
Taper	Linear
Number of Gangs	1
Number of Turns	1
Tolerance	±10%
Termination Style	Solder Lug
Mounting Type	Panel Mount
Bushing Thread	3/8-32
Rotation	312°

Substitute Part Grouping Explanation

Substitution of the Honeywell 485000M8990 is determined by strict equivalence across the following critical parameters:

Electrical Parameters: Resistance value (5k Ohm), power rating (2W), tolerance (±10%), and taper type (Linear) must be identical. These parameters define the functional electrical behavior in the circuit.

Mechanical Parameters: Number of gangs (1), number of turns (1), termination style (Solder Lug), mounting type (Panel Mount), and bushing thread specification (3/8-32) must match to ensure physical compatibility with existing PCB layouts and panel cutouts.

Dimensional Parameters: Actuator length (0.875"), actuator diameter (0.250"), and body diameter (Round - 1.094") establish fit within mechanical assemblies and control interfaces.

The identified substitute part RV4NAYSD502A from Precision Electronics Corporation meets all critical electrical and mechanical equivalence criteria, with the exception of resistive material composition (Carbon versus Conductive Plastic) and minor dimensional variations within acceptable tolerances.

Parameter Comparison

Parameter	Honeywell 485000M8990	Precision Electronics RV4NAYSD502A	Match Status
Resistance (Ohms)	5k	5k	Equivalent
Power (Watts)	2W	2W	Equivalent
Tolerance	±10%	±10%	Equivalent
Taper	Linear	Linear	Equivalent
Number of Gangs	1	1	Equivalent
Number of Turns	1	1	Equivalent
Termination Style	Solder Lug	Solder Lug	Equivalent
Mounting Type	Panel Mount	Panel Mount	Equivalent
Bushing Thread	3/8-32	3/8-32	Equivalent
Rotation	312°	314°	Within Tolerance
Actuator Length	0.875" (22.23mm)	0.875" (22.23mm)	Equivalent
Actuator Diameter	0.250" (6.35mm)	0.249" (6.32mm)	Within Tolerance
Body Diameter	Round - 1.094" (27.79mm)	Round - 1.120" (28.45mm)	Within Tolerance
Resistive Material	Conductive Plastic	Carbon	Different
RoHS Status	RoHS Compliant	ROHS3 Compliant	Compliant
Product Status	Obsolete	Active	Active Alternative Available

Engineering Selection Recommendations

The Precision Electronics RV4NAYSD502A potentiometer serves as a direct functional substitute for the obsolete Honeywell 485000M8990 based on electrical and mechanical parameter equivalence. Both components are RoHS compliant and share identical ECCN and HTSUS classifications, confirming regulatory alignment.

The primary distinction between the main part and substitute is the resistive material composition: the Honeywell uses conductive plastic while the Precision Electronics part uses carbon film. Both materials are established technologies for linear potentiometer applications and deliver equivalent performance within the specified 5k Ohm, 2W, ±10% tolerance envelope.

The RV4NAYSD502A maintains active product status with substantial inventory availability (88,200 pieces), providing supply chain continuity for applications currently using the obsolete Honeywell component. Minor dimensional variations (rotation angle 314° versus 312°, body diameter 1.120" versus 1.094", actuator diameter 0.249" versus 0.250") fall within standard mechanical tolerances and do not impact functional compatibility in panel mount applications with 3/8-32 bushing thread specifications.

Frequently Asked Questions (FAQ)

Q: Can the RV4NAYSD502A be used as a direct replacement for the Honeywell 485000M8990 in existing designs?

A: Yes. The RV4NAYSD502A meets all critical electrical parameters (5k Ohm, 2W, ±10% tolerance, linear taper) and mechanical specifications (1-gang, solder lug termination, 3/8-32 panel mount bushing). Minor dimensional variations are within standard tolerances for potentiometer applications.

Q: What is the difference between conductive plastic and carbon film resistive materials?

A: Both materials are standard for linear potentiometer construction. Conductive plastic offers smoother operation and lower noise characteristics. Carbon film provides robust performance across temperature ranges. Both deliver equivalent electrical performance within the specified tolerance and power rating for this application.

Q: Are there any compliance or certification differences between these parts?

A: Both components are RoHS compliant. The Honeywell part carries RoHS Compliant status, while the Precision Electronics part carries ROHS3 Compliant status, indicating compliance with the current RoHS 3 directive. Both share identical ECCN (EAR99) and HTSUS (8533.40.8070) classifications.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is determined by equivalence in resistance value (5k Ohm), power rating (2W), tolerance (±10%), taper (Linear), number of gangs (1), number of turns (1), termination style (Solder Lug), mounting type (Panel Mount), and bushing thread (3/8-32). Rotation angle and body diameter variations within standard tolerances do not prevent substitution.

Q: Is the RV4NAYSD502A available in the same packaging as the Honeywell part?

A: The RV4NAYSD502A is supplied in Bulk packaging. Inventory availability is 88,200 pieces in new original condition, providing immediate supply for replacement and new design applications.

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