20J39R Equivalent & Substitute Parts

Part Overview

The 20J39R is a 39 Ohm, 5% tolerance, 10W through-hole axial wirewound resistor manufactured by Ohmite. This component features flame retardant coating and safety construction, designed for applications requiring reliable power dissipation in axial package format. The part is currently active in production with 987 pieces available in new original stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

20J39R

OhmiteIn Stock: 107820J39R Datasheet

Current PartRFQ

20J39RE

OhmiteIn Stock: 210620J39RE Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 20J39RE qualifies as a direct substitute for the 20J39R based on identical electrical and mechanical parameters. Substitution is valid when the following criteria are met:

• Resistance value: 39 Ohms (exact match)
• Tolerance: ±5% (exact match)
• Power rating: 10W (exact match)
• Composition: Wirewound (exact match)
• Package: Axial (exact match)
• Physical dimensions: 0.394" Dia x 1.858" L (exact match)
• Temperature coefficient: ±30ppm/°C (exact match)
• Number of terminations: 2 (exact match)
• Features: Flame Retardant Coating, Safety (exact match)

The primary difference between these parts is packaging configuration and RoHS compliance status, which do not affect electrical or mechanical interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Both the 20J39R and 20J39RE are active production parts from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on compliance requirements and packaging needs:

The 20J39R is suitable for applications where RoHS non-compliant components are acceptable and standard packaging is preferred.

The 20J39RE is the appropriate choice for applications requiring ROHS3 compliance. This part offers higher inventory availability at 2021 pieces and bulk packaging configuration.

Both parts maintain REACH Unaffected status and identical ECCN and HTSUS classifications, ensuring consistent regulatory treatment in supply chain operations.

Frequently Asked Questions (FAQ)

Q: Can 20J39RE be used as a direct replacement for 20J39R?

A: Yes. The 20J39RE is electrically and mechanically identical to the 20J39R. All critical parameters including resistance value, tolerance, power rating, composition, package type, and physical dimensions are identical. The parts are interchangeable in circuit applications.

Q: What is the difference between these two parts?

A: The primary differences are RoHS compliance status and packaging configuration. The 20J39R is RoHS non-compliant with standard packaging, while the 20J39RE is ROHS3 compliant with bulk packaging. Electrical and mechanical performance are identical.

Q: Does packaging affect circuit performance?

A: No. Packaging configuration (standard versus bulk) does not affect electrical performance or mechanical fit. Both parts use identical axial package construction with the same physical dimensions.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring ROHS3 compliance, specify 20J39RE. For applications where RoHS compliance is not required, either part is acceptable. Consider inventory availability and lead time in your sourcing decision.

Q: Are there any thermal or frequency limitations I should consider?

A: Both parts share identical temperature coefficient specifications (±30ppm/°C) and power rating (10W). No additional thermal or frequency limitations apply beyond the stated 10W power rating.