Equivalent & Substitute Parts for CTS Electrocomponents 450D253F8

Part Overview

The CTS Electrocomponents 450D253F8 is a 25k Ohm, 1/3W carbon linear panel mount potentiometer from the Stock Pot™ 450 series. This component features a single gang configuration with a 300° rotation, solder lug termination, and a flatted actuator design. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing applications and new designs requiring this resistance value and power rating specification.

Substiute Parts

450D253F8

CTS ElectrocomponentsIn Stock: 847450D253F8 Datasheet

Current PartRFQ

026TB32R253B1A1

CTS ElectrocomponentsIn Stock: 1583026TB32R253B1A1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 450D253F8 is based on maintaining electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Parameters:

• Resistance value: 25k Ohm (exact match required)
• Taper characteristic: Linear (functional requirement for application behavior)
• Tolerance: ±20% (acceptable variance specification)

Mechanical Compatibility Parameters:

• Mounting type: Panel Mount (installation method)
• Termination style: Solder Lug (circuit connection method)
• Bushing thread: 3/8-32 (panel mounting interface)
• Actuator diameter: 0.250" (6.35mm) (shaft compatibility)
• Actuator length: 1.000" (25.40mm) (shaft extension)
• Number of gangs: 1 (single control element)
• Number of turns: 1 (rotation characteristic)
• Rotation: 300° (mechanical travel range)

Functional Parameters:

• Built-in switch: None (no switching function required)
• Adjustment type: User Defined (manual adjustment application)

The substitute part 026TB32R253B1A1 maintains all critical electrical and mechanical parameters while offering enhanced power rating and improved product status.

Parameter Comparison

Engineering Selection Recommendations

The 026TB32R253B1A1 serves as a direct functional substitute for the obsolete 450D253F8 based on the following engineering criteria:

Electrical Equivalence: Both parts maintain identical resistance value (25k Ohm), tolerance (±20%), and linear taper characteristic. The substitute provides superior power handling capability (5W versus 1/3W), which is compatible with applications designed for the lower power rating.

Mechanical Compatibility: Identical mounting interface (3/8-32 bushing thread), termination method (solder lug), actuator dimensions (0.250" diameter, 1.000" length), and rotation specification (300°) ensure direct mechanical substitution without modification to existing panel cutouts or circuit board layouts.

Product Status and Compliance: The 450D253F8 is classified as obsolete, making the 026TB32R253B1A1 the appropriate active alternative. The substitute part achieves ROHS3 compliance, addressing regulatory requirements for new designs and manufacturing operations subject to RoHS directives.

Material Consideration: The substitute employs wirewound resistive material compared to the carbon construction of the original part. This change provides improved stability and power handling without affecting the specified electrical parameters or functional performance in linear potentiometer applications.

Frequently Asked Questions (FAQ)

Q: Can the 026TB32R253B1A1 directly replace the 450D253F8 in existing applications?

A: Yes. Both parts share identical electrical specifications (25k Ohm, ±20% tolerance, linear taper), mechanical mounting parameters (3/8-32 bushing thread, solder lug termination), and actuator dimensions (0.250" diameter, 1.000" length). The substitute accommodates the original part's power requirements while providing additional power handling capacity.

Q: What is the significance of the power rating difference between the two parts?

A: The 450D253F8 is rated at 0.333W (1/3W), while the 026TB32R253B1A1 is rated at 5W. Applications designed for the lower power rating operate safely with the higher-rated substitute. The increased power rating does not affect electrical performance or mechanical operation in circuits designed for the original part.

Q: Are there packaging differences between these parts?

A: The 450D253F8 is supplied with packaging designation "-" while the 026TB32R253B1A1 is supplied in Bulk packaging. Both parts are available in active inventory. Packaging differences do not affect component functionality or electrical characteristics.

Q: What is the difference between carbon and wirewound resistive materials in this application?

A: The 450D253F8 uses carbon resistive material, while the 026TB32R253B1A1 uses wirewound construction. Both materials achieve the specified 25k Ohm resistance value and ±20% tolerance. Wirewound construction provides improved thermal stability and power handling, making it suitable for applications requiring enhanced performance margins.

Q: Does the actuator type difference (flatted versus round) affect substitution?

A: The actuator type differs between parts (flatted on the original, round on the substitute), but both maintain identical diameter (0.250") and length (1.000") specifications. Actuator type selection depends on the specific knob or control mechanism used in the application. Panel mounting and electrical function remain unaffected by this difference.

Q: What compliance advantages does the substitute part offer?

A: The 026TB32R253B1A1 achieves ROHS3 compliance, addressing regulatory requirements for products manufactured or sold in regions with RoHS directives. The original 450D253F8 is classified as RoHS non-compliant. For new designs or manufacturing operations subject to RoHS requirements, the substitute part is the appropriate selection.

Q: Are both parts suitable for the same circuit applications?

A: Yes. Both parts function as 25k Ohm linear potentiometers with identical electrical characteristics and mechanical interfaces. The substitute part's enhanced power rating and improved compliance status make it suitable for applications originally designed for the 450D253F8.