Littelfuse P1004-31 Equivalent & Substitute Parts

Part Overview

The Littelfuse P1004-31 is a 3M Ohm, 1/4W wirewound linear potentiometer designed for panel mount applications with a 300° rotation and solder lug termination. This component is classified as obsolete, making substitute parts necessary for ongoing production and maintenance applications. The P1004 series provides alternative resistance values within the same mechanical and electrical framework to support circuit designs requiring different impedance levels.

Substiute Parts

P1004-31

Littelfuse Inc.In Stock: 770P1004-31 Datasheet

Current PartRFQ

P1004-10

Littelfuse Inc.In Stock: 943P1004-10 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the P1004 series is determined by the following critical parameters that must remain constant:

• Mechanical Compatibility: Mounting type (panel mount), actuator type (slotted), rotation angle (300°), termination style (solder lug), and number of gangs (1) must be identical
• Electrical Specifications: Power rating (0.25W), tolerance (±10%), taper (linear), number of turns (1), and resistive material (wirewound) must match
• Compliance & Certification: RoHS3 compliance and ECCN/HTSUS classifications must be maintained

The P1004-10 substitute part maintains all mechanical and electrical parameters while offering a different resistance value (1M Ohm). This allows circuit designers to select the appropriate impedance level for their application while preserving all other functional characteristics.

Parameter Comparison

Engineering Selection Recommendations

The P1004-10 is the designated substitute for the obsolete P1004-31. Selection between these parts is determined by circuit impedance requirements:

• P1004-31 (3M Ohm): Use when the circuit design specifies 3M Ohm impedance. This part is obsolete; stock availability is limited to existing inventory.
• P1004-10 (1M Ohm): Use when the circuit design specifies 1M Ohm impedance. This part is active and maintains full manufacturing support and compliance certifications.

Both parts maintain identical mechanical interfaces, electrical performance characteristics, and regulatory compliance. The active status of the P1004-10 ensures continued availability and manufacturing support for new designs and production runs.

Frequently Asked Questions (FAQ)

Q: Can the P1004-10 be used as a direct replacement for the P1004-31?

A: The P1004-10 is mechanically and electrically compatible with the P1004-31 in all parameters except resistance value. Direct substitution is possible only if the circuit design can accommodate the 1M Ohm resistance instead of 3M Ohm. Verify circuit impedance requirements before substitution.

Q: What is the difference between these potentiometers?

A: The primary difference is the resistance value: P1004-31 provides 3M Ohm, while P1004-10 provides 1M Ohm. All other specifications—power rating, taper, rotation, termination, and mounting—are identical.

Q: Why is the P1004-31 obsolete?

A: The P1004-31 has been discontinued by Littelfuse Inc. The P1004 series continues with alternative resistance values, including the P1004-10, to support ongoing applications.

Q: Are both parts RoHS3 compliant?

A: Yes, both the P1004-31 and P1004-10 are ROHS3 compliant and meet the same regulatory requirements.

Q: What packaging options are available?

A: The P1004-31 is available in standard packaging, while the P1004-10 is supplied in bulk packaging. Confirm packaging requirements with your procurement specifications.