Equivalent & Substitute Parts for R3J390

Part Overview

The R3J390 is a 390 Ohm, 3W wirewound through-hole resistor manufactured by Ohmite in the PC-58 series. This radial component features flame retardant coating and safety construction, designed for applications requiring reliable power dissipation in through-hole configurations. The part is currently active in production with 758 units in stock. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility.

Substiute Parts

R3J390

OhmiteIn Stock: 770R3J390 Datasheet

Current PartRFQ

R3J390E

OhmiteIn Stock: 690R3J390E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The R3J390E is classified as a parametric equivalent to the R3J390. Substitution is valid based on the following criteria:

• Identical resistance value: 390 Ohms
• Identical tolerance: ±5%
• Identical power rating: 3W
• Identical composition: Wirewound
• Identical package type: Radial
• Identical temperature coefficient: ±260ppm/°C
• Identical physical dimensions: 0.438" L x 0.313" W (11.13mm x 7.95mm)
• Identical seated height: 0.469" (11.91mm)
• Identical number of terminations: 2
• Identical features: Flame Retardant Coating, Safety
• Same manufacturer: Ohmite
• Same series: PC-58

The R3J390E differs only in packaging format (Bulk versus standard) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the R3J390 and R3J390E are active production parts from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory requirements:

• Use R3J390 for applications where RoHS non-compliance is acceptable or required by design specifications.
• Use R3J390E for applications requiring ROHS3 compliance or where regulatory standards mandate lead-free construction.

Both parts are suitable for direct substitution in through-hole PCB applications requiring 390 Ohm, 3W wirewound resistors with radial configuration.

Frequently Asked Questions (FAQ)

Q: Can R3J390E be used as a direct replacement for R3J390?

A: Yes. The R3J390E is electrically and mechanically identical to the R3J390. Both components have the same resistance value, tolerance, power rating, temperature coefficient, physical dimensions, and radial package configuration. The primary difference is RoHS compliance status.

Q: What is the difference between R3J390 and R3J390E?

A: The R3J390E is ROHS3 compliant, while the R3J390 is RoHS non-compliant. All other electrical and mechanical parameters are identical.

Q: Are the physical dimensions identical between R3J390 and R3J390E?

A: Yes. Both parts have identical dimensions of 0.438" L x 0.313" W (11.13mm x 7.95mm) with a maximum seated height of 0.469" (11.91mm). They are fully compatible for PCB layout and mounting.

Q: What packaging formats are available?

A: R3J390 is available in standard packaging, while R3J390E is available in Bulk packaging. Both formats contain the same component specifications.

Q: Which part should be selected for new designs?

A: Selection depends on regulatory and compliance requirements. For applications requiring ROHS3 compliance, specify R3J390E. For applications without RoHS requirements, either part is suitable based on availability and sourcing preferences.