Ohmite 42J20R Equivalent & Substitute Parts

Part Overview

The Ohmite 42J20R is a 20 Ohm, 2W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistive elements with wirewound construction and tight tolerance specifications. The part maintains Active product status with 1074 units in current inventory. Substitute parts are identified when packaging configurations, compliance certifications, or inventory availability require alternative sourcing while maintaining identical electrical and mechanical performance.

Substiute Parts

42J20R

OhmiteIn Stock: 110842J20R Datasheet

Current PartRFQ

42J20RE

OhmiteIn Stock: 123242J20RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 42J20RE qualifies as a parametric equivalent to the 42J20R based on matching electrical specifications: identical resistance value (20 Ohms), tolerance (±5%), power rating (2W), wirewound composition, temperature coefficient (±20ppm/°C), and axial package configuration. Physical dimensions remain constant at 0.220" Dia x 0.406" L. The primary distinction between these parts is packaging format (Bulk for 42J20RE versus standard for 42J20R) and compliance certifications. Both parts are Active status components suitable for direct substitution in circuit applications where the specified electrical and mechanical parameters are required.

Parameter Comparison

Engineering Selection Recommendations

Selection between the 42J20R and 42J20RE should be based on compliance and environmental requirements. The 42J20RE offers RoHS compliance and defined operating temperature range (-55°C ~ 275°C), making it suitable for applications subject to RoHS directives or requiring documented thermal performance specifications. The 42J20R remains appropriate for applications without RoHS compliance mandates. Both parts deliver identical electrical performance and physical form factor, ensuring direct functional interchangeability in circuit designs. Packaging format (Bulk for 42J20RE) may influence procurement decisions based on order quantity and inventory management requirements.

Frequently Asked Questions (FAQ)

Q: Can the 42J20RE directly replace the 42J20R in existing designs? A: Yes. Both parts share identical electrical specifications (20 Ohms, ±5%, 2W), wirewound composition, temperature coefficient (±20ppm/°C), and axial package dimensions (0.220" Dia x 0.406" L). Direct substitution is electrically and mechanically valid.

Q: What is the primary difference between these two part numbers? A: The 42J20RE features RoHS compliance and specified operating temperature range (-55°C ~ 275°C), while the 42J20R is RoHS non-compliant. Packaging format also differs (Bulk versus standard). Electrical performance is identical.

Q: Does packaging format affect circuit performance? A: No. Packaging format (Bulk for 42J20RE) relates to supplier delivery and inventory management only. Electrical and mechanical characteristics remain unchanged.

Q: Which part should be selected for RoHS-regulated applications? A: The 42J20RE is RoHS Compliant and suitable for applications requiring RoHS certification. The 42J20R is RoHS non-compliant and should not be used in RoHS-mandated environments.

Q: Are the physical dimensions identical between both parts? A: Yes. Both the 42J20R and 42J20RE maintain identical axial dimensions of 0.220" Dia x 0.406" L (5.60mm x 10.30mm), ensuring identical PCB footprint and mounting compatibility.