OF821JE Equivalent & Substitute Parts Reference

Part Overview

The OF821JE is a 820 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 configuration. The product is currently obsolete, making identification of suitable substitute components essential for legacy system maintenance, repair, and redesign applications.

Substiute Parts

OF821JE

OhmiteIn Stock: 1206OF821JE Datasheet

Current PartRFQ

OF821KE

OhmiteIn Stock: 1468OF821KE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the OF821JE is determined by the following critical parameters:

Resistance value must remain 820 Ohms. Tolerance may be relaxed from ±5% to ±10% where circuit design permits, as this represents a wider acceptable range within the same nominal value. Power rating must equal or exceed 0.5W. Package configuration must remain axial to ensure mechanical and electrical compatibility with existing PCB layouts and through-hole mounting requirements. Physical dimensions must be compatible with board spacing and component placement constraints. Composition type (carbon composition) and termination count (2) must be maintained. RoHS3 compliance and MSL rating ensure regulatory and environmental compatibility.

Parameter Comparison

Engineering Selection Recommendations

The OF821KE serves as the direct manufacturer-recommended substitute for the OF821JE. Both components are obsolete products from the same Ohmite Little Demon® OF series, maintaining identical physical dimensions, power ratings, composition type, and pulse withstanding characteristics. The primary difference is tolerance specification: OF821KE operates at ±10% tolerance compared to OF821JE's ±5% tolerance.

Selection of OF821KE is appropriate where circuit tolerance budgets accommodate the wider ±10% specification. Both parts maintain ROHS3 compliance and MSL rating 1, ensuring regulatory and environmental compatibility. Identical axial package configuration and termination count guarantee mechanical and electrical compatibility with existing through-hole PCB designs.

Frequently Asked Questions (FAQ)

Q: Can OF821KE replace OF821JE in all applications? A: OF821KE is suitable where the circuit design tolerance budget permits ±10% resistance variation. Applications requiring ±5% tolerance specification must evaluate whether the relaxed tolerance affects circuit performance.

Q: Are the physical dimensions identical between these parts? A: Yes. Both OF821JE and OF821KE share identical dimensions of 0.150" diameter by 0.406" length (3.80mm x 10.30mm), ensuring compatibility with existing PCB layouts and component placement.

Q: Do both parts meet current regulatory requirements? A: Both OF821JE and OF821KE are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity level), meeting current environmental and regulatory standards.

Q: What is the significance of the carbon composition construction? A: Carbon composition construction provides pulse withstanding capability, a feature maintained in both the main part and substitute. This characteristic is critical for applications subject to transient voltage events.

Q: Are there packaging differences between these parts? A: Both parts are supplied in axial package configuration. OF821JE is listed as standard packaging, while OF821KE is available in bulk packaging. The component form factor remains identical.