Ohmite 45J390 390 Ohm 5W Axial Wirewound Resistor - Equivalent & Substitute Parts

Part Overview

The Ohmite 45J390 is a 390 Ohm, 5% tolerance, 5W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision power dissipation in compact axial form factor. The part is currently active in production with 696 units in stock. Equivalent and substitute parts are identified when identical electrical specifications and mechanical compatibility are maintained across the same resistance value, tolerance, power rating, and package type.

Substiute Parts

45J390

OhmiteIn Stock: 79345J390 Datasheet

Current PartRFQ

45J390E

OhmiteIn Stock: 101745J390E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Ohmite 45J390 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part must maintain:

• Identical resistance value: 390 Ohms
• Identical tolerance: ±5%
• Identical power rating: 5W
• Identical composition: Wirewound
• Identical package configuration: Axial with 2 terminations
• Identical temperature coefficient: ±20ppm/°C
• Compatible physical dimensions: 0.343" Dia x 0.937" L (8.70mm x 23.80mm)

The identified substitute part 45J390E meets all these criteria and is therefore a direct parametric equivalent suitable for component replacement in applications where the 45J390 is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the 45J390 and 45J390E are active production components from Ohmite's Ohmicone® 40 series with identical electrical and mechanical specifications. Selection between these parts should be based on packaging requirements and regulatory compliance status:

The 45J390 is supplied in standard packaging and is RoHS non-compliant. The 45J390E is supplied in bulk packaging and is ROHS3 compliant. For applications subject to RoHS directives or requiring bulk packaging configurations, the 45J390E is the appropriate selection. For applications without RoHS requirements and standard packaging needs, either part is suitable based on availability and procurement specifications.

Frequently Asked Questions (FAQ)

Q: Can the 45J390E replace the 45J390 in my circuit?

A: Yes. Both parts are parametric equivalents with identical resistance (390 Ohms), tolerance (±5%), power rating (5W), composition (wirewound), package type (axial), temperature coefficient (±20ppm/°C), and physical dimensions (0.343" Dia x 0.937" L). They are electrically and mechanically interchangeable.

Q: What is the difference between the 45J390 and 45J390E?

A: The primary differences are packaging format and RoHS compliance status. The 45J390 uses standard packaging and is RoHS non-compliant. The 45J390E uses bulk packaging and is ROHS3 compliant. All electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns when substituting the 45J390E for the 45J390?

A: No compatibility concerns exist for electrical or mechanical performance. The axial package configuration, lead spacing, and physical dimensions are identical. Substitution is valid for all applications where the 45J390 is specified, provided packaging and compliance requirements are satisfied.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements and packaging specifications. For applications requiring RoHS compliance, select the 45J390E. For applications without RoHS requirements, either part is suitable based on packaging preference and availability.

Q: Are both parts currently available?

A: Yes. The 45J390 has 696 units in stock, and the 45J390E has 928 units in stock, both listed as new original inventory.