OF221JE Equivalent & Substitute Parts

Part Overview

The OF221JE is a 220 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 housed in an axial package with 0.150" diameter and 0.406" length (3.80mm x 10.30mm). The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where this component is specified.

Substiute Parts

OF221JE

OhmiteIn Stock: 863OF221JE Datasheet

Current PartRFQ

OF221KE

OhmiteIn Stock: 1469OF221KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OF221JE is determined by the following critical parameters that must remain constant or within acceptable variation:

• Resistance value: 220 Ohms (exact match required)
• Power rating: 0.5W / 1/2W (exact match required)
• Package type: Axial (exact match required)
• Physical dimensions: 0.150" Dia x 0.406" L (exact match required)
• Composition: Carbon Composition (exact match required)
• Number of terminations: 2 (exact match required)

The tolerance specification may vary within acceptable limits for the application. The OF221KE substitute maintains all critical parameters while offering a ±10% tolerance specification compared to the original ±5% tolerance.

Parameter Comparison

Engineering Selection Recommendations

The OF221KE is the manufacturer-recommended substitute for the OF221JE. Both components are obsolete products from the same Ohmite Little Demon® OF series and maintain identical physical dimensions, power ratings, and composition specifications. Both parts are ROHS3 compliant with MSL rating of 1 (Unlimited), ensuring compatibility in applications requiring regulatory compliance.

The primary difference between these parts is the tolerance specification: the OF221JE provides ±5% tolerance while the OF221KE provides ±10% tolerance. Selection between these parts should be based on the tolerance requirements of the specific application circuit. Applications requiring tighter tolerance control should specify the OF221JE where available; applications with broader tolerance acceptance may utilize the OF221KE.

Frequently Asked Questions (FAQ)

Q: Can OF221KE be used as a direct replacement for OF221JE?

A: Yes, the OF221KE is the manufacturer-recommended substitute. Both parts share identical resistance values, power ratings, physical dimensions, package types, and composition. The tolerance specification differs (±10% versus ±5%), which should be evaluated against application requirements.

Q: What is the primary difference between OF221JE and OF221KE?

A: The tolerance specification is the primary difference. OF221JE provides ±5% tolerance while OF221KE provides ±10% tolerance. All other electrical and mechanical parameters are identical.

Q: Are both parts physically interchangeable?

A: Yes. Both OF221JE and OF221KE are axial package resistors with identical dimensions of 0.150" diameter by 0.406" length (3.80mm x 10.30mm), making them mechanically interchangeable in through-hole applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both OF221JE and OF221KE are ROHS3 compliant with MSL rating of 1 (Unlimited), meeting the same regulatory and environmental requirements.

Q: Why are both parts listed as obsolete?

A: Both the OF221JE and OF221KE are obsolete products from the Little Demon® OF series. Obsolete status indicates these components are no longer in active production. Inventory availability should be confirmed with authorized distributors before design implementation.