RJ-4EW502 Trimmer Potentiometer Equivalent & Substitute Parts

Part Overview

The RJ-4EW502 is a 5 kOhm, 0.5W through-hole trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based component features top adjustment with PC pin termination and is designed for applications requiring precision variable resistance in compact form factors. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility within the through-hole trimmer potentiometer category.

Substiute Parts

RJ-4EW502

Nidec Components CorporationIn Stock: 811RJ-4EW502 Datasheet

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25PR5KLF

TT Electronics/BIIn Stock: 941625PR5KLF Datasheet

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3329H-1-502LF

Bourns Inc.In Stock: 43423329H-1-502LF Datasheet

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72PMR5KLF

TT Electronics/BIIn Stock: 487072PMR5KLF Datasheet

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72PR5KLF

TT Electronics/BIIn Stock: 190172PR5KLF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RJ-4EW502 is determined by strict equivalence across the following critical parameters:

• Resistance Value: 5 kOhms (exact match required)
• Power Rating: 0.5W / 1/2W (exact match required)
• Tolerance: ±10% (exact match required)
• Temperature Coefficient: ±100ppm/°C (exact match required)
• Number of Turns: 1 (exact match required)
• Adjustment Type: Top Adjustment (exact match required)
• Resistive Material: Cermet (exact match required)
• Mounting Type: Through Hole (exact match required)
• Termination Style: PC Pins (exact match required)

All four substitute parts listed below meet these electrical and mechanical criteria. Physical dimensions vary within acceptable through-hole PCB mounting tolerances. Packaging format and inventory availability differ but do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

All four substitute parts are functionally equivalent to the RJ-4EW502 based on electrical parameters and mechanical compatibility. Selection among these alternatives should be based on the following factors:

Compliance & Certification: The RJ-4EW502, 3329H-1-502LF, 72PR5KLF, and 72PMR5KLF all carry ROHS3 compliance. The 25PR5KLF carries RoHS compliance. The 3329H-1-502LF is REACH Affected; all other parts are REACH Unaffected.

Physical Dimensions: The RJ-4EW502 features the smallest footprint at 0.193" diameter (4.90mm). The 3329H-1-502LF is 0.250" diameter (6.35mm). The 25PR5KLF is 0.270" x 0.270" square (6.86mm x 6.86mm). Both 72PR5KLF and 72PMR5KLF are 0.375" x 0.375" square (9.53mm x 9.53mm). PCB layout constraints and available mounting space determine dimensional suitability.

Packaging & Availability: The RJ-4EW502 is supplied in Bulk packaging with 783 units in stock. The 3329H-1-502LF and 25PR5KLF are supplied in Tube packaging with 4300 and 9327 units respectively. The 72PR5KLF and 72PMR5KLF are supplied in Bulk packaging with 1817 and 4800 units respectively.

Manufacturer Sourcing: Nidec Components Corporation (RJ-4EW502), Bourns Inc. (3329H-1-502LF), and TT Electronics/BI (25PR5KLF, 72PR5KLF, 72PMR5KLF) represent established suppliers within the trimmer potentiometer market.

Frequently Asked Questions (FAQ)

Q: Can the 3329H-1-502LF replace the RJ-4EW502 in my circuit? A: Yes. Both parts share identical electrical specifications (5 kOhms, 0.5W, ±10% tolerance, ±100ppm/°C temperature coefficient, 1 turn, top adjustment, cermet material, through-hole mounting, PC pins). The primary difference is physical size: the 3329H-1-502LF is 0.250" diameter versus the RJ-4EW502 at 0.193" diameter. Verify PCB layout accommodates the larger footprint.

Q: What is the difference between the 72PR5KLF and 72PMR5KLF? A: Both parts are electrically identical 5 kOhm, 0.5W trimmer potentiometers from TT Electronics/BI with matching specifications. The primary distinction is the base product number (72PR versus 72PMR), which may indicate internal design variations. Both are functionally equivalent to the RJ-4EW502 and suitable for direct substitution where space permits the 0.375" x 0.375" square footprint.

Q: Are all substitute parts RoHS compliant? A: Yes. The RJ-4EW502, 3329H-1-502LF, 72PR5KLF, and 72PMR5KLF are ROHS3 compliant. The 25PR5KLF is RoHS compliant. All parts meet environmental compliance requirements for electronics manufacturing.

Q: Does the 25PR5KLF come in different packaging than the RJ-4EW502? A: Yes. The RJ-4EW502 is supplied in Bulk packaging, while the 25PR5KLF is supplied in Tube packaging. Both formats contain new original stock. Packaging selection may affect procurement lead times and minimum order quantities.

Q: Can I use the larger 72PR5KLF or 72PMR5KLF if space is available? A: Yes. Both 72-series parts are electrically and mechanically equivalent to the RJ-4EW502. The 0.375" x 0.375" square footprint is larger than the RJ-4EW502's 0.193" round footprint. If PCB layout permits the increased dimensions, these parts are direct functional substitutes.

Q: What is the REACH status difference between these parts? A: The 3329H-1-502LF is REACH Affected. The RJ-4EW502, 25PR5KLF, 72PR5KLF, and 72PMR5KLF are REACH Unaffected. For applications subject to REACH regulations, the REACH Unaffected parts may be preferred, though all parts meet current compliance standards.