Ohmite 43J390 Equivalent & Substitute Parts

Part Overview

The Ohmite 43J390 is a 390 Ohms ±5% 3W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is designed for applications requiring precision power dissipation in compact form factors. The part maintains active product status with 1081 units in current inventory. Substitute parts are identified to address packaging preferences, compliance requirements, and supply chain flexibility while maintaining identical electrical and mechanical specifications.

Substiute Parts

43J390

OhmiteIn Stock: 119143J390 Datasheet

Current PartRFQ

43J390E

OhmiteIn Stock: 103343J390E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43J390 is determined by strict equivalence across electrical and mechanical parameters. The primary substitute, 43J390E, maintains identical resistance value (390 Ohms), tolerance (±5%), power rating (3W), wirewound composition, axial package configuration, temperature coefficient (±20ppm/°C), and physical dimensions (0.220" Dia x 0.594" L). The key differentiator is packaging format: the 43J390E is supplied in bulk packaging versus the standard packaging of the main part. Both parts are manufactured by Ohmite and classified under the same Ohmicone® 40 series. Substitution is valid where packaging format does not impose circuit board assembly constraints.

Parameter Comparison

Engineering Selection Recommendations

Selection between the 43J390 and 43J390E is determined by regulatory and supply requirements rather than electrical performance. Both parts deliver identical functional characteristics across all critical parameters: 390 Ohm resistance, ±5% tolerance, 3W power dissipation, wirewound construction, and axial package geometry.

The 43J390E offers ROHS3 compliance, making it the appropriate choice for applications subject to RoHS directives or customer specifications requiring RoHS certification. The 43J390 remains suitable for applications without RoHS compliance mandates.

Packaging format differs between parts: standard packaging for 43J390 versus bulk packaging for 43J390E. Selection should account for assembly line handling requirements and component tape/reel versus bulk bin compatibility with pick-and-place equipment.

Both parts maintain active product status with adequate inventory levels (1081 and 992 units respectively), supporting production continuity.

Frequently Asked Questions (FAQ)

Q: Can 43J390E replace 43J390 in existing designs? A: Yes. The 43J390E is electrically and mechanically equivalent. Substitution is valid provided the bulk packaging format is compatible with assembly processes. No circuit design changes are required.

Q: What is the difference between 43J390 and 43J390E? A: The parts are identical in electrical specifications (390 Ohms, ±5%, 3W, wirewound, axial) and physical dimensions. The 43J390E differs in packaging format (bulk) and RoHS compliance status (ROHS3 compliant versus non-compliant).

Q: Which part should I specify for RoHS-compliant applications? A: Specify 43J390E for designs requiring RoHS3 compliance certification.

Q: Are there any thermal or frequency limitations that affect substitution? A: No. Both parts share identical temperature coefficient (±20ppm/°C) and power rating (3W). Thermal and frequency performance are equivalent.

Q: Does packaging format affect electrical performance? A: No. Packaging format (standard versus bulk) affects only component handling and assembly logistics, not electrical or mechanical function.

Q: What inventory levels are available? A: 43J390 has 1081 units in stock; 43J390E has 992 units in stock. Both support production requirements.