RJ-4EW200 Equivalent & Substitute Parts

Part Overview

The RJ-4EW200 is a 20 Ohm, 0.5W through-hole trimmer potentiometer manufactured by Nidec Components Corporation. This cermet-based component features PC pin termination and top adjustment capability, designed for applications requiring precision resistance tuning in compact form factors. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter tolerances for this product category.

Substiute Parts

RJ-4EW200

Nidec Components CorporationIn Stock: 846RJ-4EW200 Datasheet

Current PartRFQ

25PR200LF

TT Electronics/BIIn Stock: 512025PR200LF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute part identification for the RJ-4EW200 is based on the following allowed parameters:

• Electrical Function: Power rating (0.5W), adjustment type (top adjustment), and resistive material (cermet) must be maintained
• Mechanical Compatibility: Through-hole mounting with PC pin termination is required
• Regulatory Compliance: RoHS compliance status and REACH unaffected designation must be preserved
• Performance Characteristics: Temperature coefficient and tolerance specifications define acceptable performance boundaries

The substitute part 25PR200LF is identified based on matching core electrical and mechanical parameters. However, critical differences exist in resistance value (200 Ohms vs. 20 Ohms) and physical dimensions, which must be evaluated for specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

RJ-4EW200 (Primary Selection)

Use the RJ-4EW200 when the circuit design specifically requires 20 Ohm resistance value. This part maintains Active product status with RoHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term availability and environmental regulatory alignment.

25PR200LF (Substitute Consideration)

The 25PR200LF can be considered only when circuit design permits 200 Ohm resistance substitution. This part offers improved temperature coefficient stability (±100ppm/°C vs. ±250ppm/°C) and maintains RoHS compliance. Physical dimension differences (square 6.86mm vs. round 4.90mm) require PCB layout verification. Both parts share identical power rating, tolerance, adjustment type, and resistive material composition.

Frequently Asked Questions (FAQ)

Q: Can 25PR200LF directly replace RJ-4EW200 in my circuit?

A: Direct replacement is not possible due to resistance value difference (200 Ohms vs. 20 Ohms). Substitution is only valid if circuit design permits 10x higher resistance value. Physical dimensions also differ, requiring PCB layout verification.

Q: What are the key matching parameters between these parts?

A: Both parts share 0.5W power rating, ±10% tolerance, 1-turn adjustment, top adjustment type, cermet resistive material, through-hole mounting, and PC pin termination. Temperature coefficient and physical dimensions differ.

Q: Are both parts RoHS compliant?

A: Yes. RJ-4EW200 is RoHS3 compliant; 25PR200LF is RoHS compliant. Both meet environmental regulatory requirements, with RoHS3 representing the more recent standard revision.

Q: How do the physical dimensions affect board design?

A: RJ-4EW200 uses a round form factor (4.90mm diameter), while 25PR200LF uses a square form factor (6.86mm x 6.86mm). Board layout, component spacing, and mechanical clearance requirements must be re-evaluated for any substitution.

Q: What is the temperature stability difference?

A: RJ-4EW200 has ±250ppm/°C temperature coefficient; 25PR200LF has ±100ppm/°C. The substitute part provides superior temperature stability, beneficial for applications with wide operating temperature ranges.