RJ-4EW102 Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The RJ-4EW102 is a 1 kOhms, 0.5W through-hole trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based component features PC pin termination, top adjustment, and a single turn configuration. The part is currently active in production with 893 units in stock. Equivalent and substitute parts are identified based on matching electrical specifications, mechanical compatibility, and functional performance within the RJ-4 series and cross-manufacturer alternatives.

Substiute Parts

RJ-4EW102

Nidec Components CorporationIn Stock: 907RJ-4EW102 Datasheet

Current PartRFQ

25PR1KLF

TT Electronics/BIIn Stock: 1231025PR1KLF Datasheet

SimilarRFQ

3329H-1-102LF

Bourns Inc.In Stock: 33873329H-1-102LF Datasheet

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72PMR1KLF

TT Electronics/BIIn Stock: 204472PMR1KLF Datasheet

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72PR1KLF

TT Electronics/BIIn Stock: 200572PR1KLF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RJ-4EW102 is determined by strict equivalence across the following critical parameters:

• Resistance value: 1 kOhms
• Power rating: 0.5W (1/2W)
• Tolerance: ±10%
• Temperature coefficient: ±100ppm/°C
• Number of turns: 1
• Adjustment type: Top Adjustment
• Resistive material: Cermet
• Mounting type: Through Hole
• Termination style: PC Pins

All substitute parts listed meet these electrical and mechanical requirements. Physical dimensions vary by manufacturer design, but all parts maintain functional compatibility within standard PCB layout tolerances for through-hole trimmer potentiometers.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with confirmed inventory availability. Selection between the RJ-4EW102 and its equivalents depends on PCB layout constraints and mechanical fit requirements:

The RJ-4EW102 (Nidec) and 3329H-1-102LF (Bourns) feature round form factors with diameters of 4.90mm and 6.35mm respectively, suitable for compact layouts. The 25PR1KLF (TT Electronics/BI) provides a square 6.86mm footprint with higher inventory availability (12299 units). The 72PMR1KLF and 72PR1KLF (both TT Electronics/BI) offer larger square 9.53mm footprints for applications requiring increased mechanical stability.

All parts maintain ROHS3 compliance or equivalent RoHS certification. The 3329H-1-102LF carries REACH Affected status, while remaining parts are REACH Unaffected. Component selection should account for regulatory requirements specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can the 25PR1KLF substitute for the RJ-4EW102 in all applications?

A: Yes, electrically and functionally. The 25PR1KLF matches all critical electrical parameters: 1 kOhms resistance, 0.5W power rating, ±10% tolerance, and ±100ppm/°C temperature coefficient. The primary difference is physical form factor—square 6.86mm versus round 4.90mm. PCB layout must accommodate the larger footprint.

Q: What is the difference between the 72PR1KLF and 72PMR1KLF?

A: Both parts are manufactured by TT Electronics/BI with identical electrical specifications and packaging dimensions (square 9.53mm). The designation difference reflects internal product line categorization. Both are functionally equivalent to the RJ-4EW102.

Q: Does the Bourns 3329H-1-102LF REACH Affected status affect substitution eligibility?

A: REACH Affected status indicates the component contains substances of concern under REACH regulations. This does not affect electrical or mechanical compatibility. Selection depends on end-use application regulatory requirements and supply chain compliance policies.

Q: Are there dimensional constraints for PCB layout when substituting parts?

A: Yes. The RJ-4EW102 (4.90mm round) is the smallest footprint. The 25PR1KLF (6.86mm square) requires additional board space. The 72PR1KLF and 72PMR1KLF (9.53mm square) are the largest. Verify PCB layout clearances before substitution.

Q: Which substitute part has the highest inventory availability?

A: The 25PR1KLF (TT Electronics/BI) with 12299 units in stock, followed by the 3329H-1-102LF (Bourns) with 3300 units. The RJ-4EW102 has 893 units available.