OF201JE Equivalent & Substitute Parts

Part Overview

The OF201JE is a 200 Ohms ±5% 0.5W through-hole axial resistor manufactured by Ohmite as part of the Little Demon® OF series. This carbon composition resistor features pulse withstanding capability and is designed for axial lead applications. The product is currently obsolete, making equivalent or substitute parts necessary for legacy system maintenance, repair, and component sourcing.

Substiute Parts

OF201JE

OhmiteIn Stock: 872OF201JE Datasheet

Current PartRFQ

OF181KE

OhmiteIn Stock: 1853OF181KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OF201JE is based on the following critical parameters:

• Package Type: Axial through-hole configuration with identical physical dimensions (0.150" Dia x 0.406" L)
• Power Rating: 0.5W (1/2W) minimum
• Composition: Carbon composition construction
• Series Compatibility: Little Demon® OF series maintains consistent electrical and mechanical characteristics
• Compliance: ROHS3 compliance and MSL Level 1 rating
• Pulse Withstanding Capability: Required for applications demanding transient protection

The OF181KE qualifies as a substitute based on matching package geometry, power rating, composition type, series designation, and compliance certifications. Resistance value and tolerance differences are application-dependent and must be evaluated within circuit context.

Parameter Comparison

Engineering Selection Recommendations

Both the OF201JE and OF181KE are obsolete products within the Little Demon® OF series. Selection between these parts depends on circuit tolerance requirements:

• OF201JE: Use when 200 Ohms ±5% tolerance is specified and circuit design accommodates this exact value.
• OF181KE: Use as a substitute when circuit design permits 180 Ohms ±10% tolerance. The 10-ohm difference represents a 5% variance from the original 200-ohm specification.

Both parts maintain identical mechanical compatibility, power handling capability, pulse withstanding performance, and compliance certifications. The primary distinction is resistance value and tolerance specification.

Frequently Asked Questions (FAQ)

Q: Can OF181KE directly replace OF201JE in all applications?

A: Physical and mechanical compatibility is confirmed. Electrical compatibility depends on circuit tolerance for the 20-ohm resistance difference (200Ω to 180Ω). Circuit analysis is required to determine if this variance is acceptable.

Q: Are the physical dimensions identical?

A: Yes. Both parts share identical axial package dimensions of 0.150" Dia x 0.406" L (3.80mm x 10.30mm), ensuring PCB footprint compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both OF201JE and OF181KE are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: What is the tolerance difference impact?

A: OF201JE specifies ±5% tolerance (190–210 Ohms operating range), while OF181KE specifies ±10% tolerance (162–198 Ohms operating range). The tolerance bands overlap partially but differ in specification stringency.

Q: Are both parts carbon composition resistors?

A: Yes. Both utilize carbon composition construction with pulse withstanding capability, maintaining consistent electrical behavior for transient protection applications.

Q: Why are both products obsolete?

A: Both OF201JE and OF181KE are listed as obsolete within the Little Demon® OF series, indicating discontinued manufacturing status.