Ohmite 91J390 Equivalent & Substitute Parts

Part Overview

The Ohmite 91J390 is a 390 Ohm ±5% 1.5W through-hole axial wirewound resistor with flame retardant coating and safety features. This component is classified as Active product status. Substitute parts are identified when the primary part experiences supply constraints, inventory limitations, or when design requirements permit equivalent electrical and mechanical specifications.

Substiute Parts

91J390

OhmiteIn Stock: 74591J390 Datasheet

Current PartRFQ

91J390E

OhmiteIn Stock: 97191J390E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 91J390E qualifies as a parametric equivalent based on the following criteria:

• Identical resistance value: 390 Ohms
• Matching tolerance: ±5%
• Equivalent power rating: 1.5W
• Same composition: Wirewound
• Identical package configuration: Axial
• Matching physical dimensions: 0.142" Dia x 0.453" L (3.60mm x 11.50mm)
• Equivalent temperature coefficient: ±30ppm/°C
• Identical features: Flame Retardant Coating, Safety
• Same number of terminations: 2

Parameter Comparison

Engineering Selection Recommendations

Both the 91J390 and 91J390E are Active status components suitable for direct substitution based on electrical and mechanical equivalence. The primary distinction is regulatory compliance: the 91J390E is ROHS3 compliant, while the 91J390 is RoHS non-compliant. Selection between these parts should be based on application requirements regarding environmental and regulatory standards. The 91J390E provides superior inventory availability (950 Pcs vs. 657 Pcs) and enhanced compliance posture for applications subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can the 91J390E be used as a direct replacement for the 91J390?

A: Yes. Both parts share identical electrical specifications (390 Ohms ±5%, 1.5W), composition (wirewound), package configuration (axial), and physical dimensions (0.142" Dia x 0.453" L). They are functionally interchangeable in circuit applications.

Q: What is the difference between these two parts?

A: The primary differences are RoHS compliance status and moisture sensitivity rating. The 91J390E is ROHS3 compliant with MSL 1 (Unlimited), while the 91J390 is RoHS non-compliant with MSL not applicable. Both maintain identical electrical and mechanical characteristics.

Q: Are the physical dimensions identical?

A: Yes. Both parts measure 0.142" diameter by 0.453" length (3.60mm x 11.50mm), ensuring identical PCB footprint and mounting compatibility.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, the 91J390E is the appropriate choice. Both parts are Active status and suitable for production use.

Q: Is the temperature coefficient the same?

A: Yes. Both parts have a temperature coefficient of ±30ppm/°C, ensuring equivalent thermal performance across operating conditions.