42JR30 Equivalent & Substitute Parts

Part Overview

The 42JR30 is a 300 mOhms ±5% 2W axial wirewound through-hole resistor manufactured by Ohmite as part of the Ohmicone® 40 series. This component is currently in active production status. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, packaging preferences, or compliance requirements.

Substiute Parts

42JR30

OhmiteIn Stock: 93642JR30 Datasheet

Current PartRFQ

42JR30E

OhmiteIn Stock: 140742JR30E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 42JR30E qualifies as a parametric equivalent based on identical electrical specifications: 300 mOhms resistance, ±5% tolerance, 2W power rating, wirewound composition, and ±90ppm/°C temperature coefficient. Both parts share the same axial package configuration and physical dimensions (0.220" Dia x 0.406" L). The primary distinction is packaging format and RoHS compliance status. Substitution is valid when these core electrical and mechanical parameters are the controlling factors in component selection.

Parameter Comparison

Engineering Selection Recommendations

Both 42JR30 and 42JR30E are active production components from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on compliance requirements and packaging needs. The 42JR30E offers ROHS3 compliance, making it suitable for applications subject to RoHS directives. The 42JR30 is available in standard packaging, while the 42JR30E is supplied in bulk format. Both parts maintain equivalent performance characteristics for axial wirewound resistor applications requiring 300 mOhms at 2W with ±5% tolerance.

Frequently Asked Questions (FAQ)

Q: Can 42JR30E replace 42JR30 in all applications? A: Yes, when electrical and mechanical specifications are the controlling design factors. The 42JR30E provides identical resistance, tolerance, power rating, temperature coefficient, and physical dimensions. Compliance requirements may influence selection between the two variants.

Q: What is the difference between 42JR30 and 42JR30E? A: The primary differences are packaging format (standard versus bulk) and RoHS compliance status. The 42JR30E is ROHS3 compliant, while the 42JR30 is RoHS non-compliant. All electrical and mechanical parameters are identical.

Q: Are the physical dimensions identical between these parts? A: Yes. Both 42JR30 and 42JR30E share the same axial package dimensions of 0.220" Dia x 0.406" L (5.60mm x 10.30mm), ensuring compatibility in PCB layouts and mechanical assemblies.

Q: Which part should be selected for RoHS-compliant applications? A: The 42JR30E is ROHS3 compliant and is the appropriate selection for applications requiring RoHS compliance. The 42JR30 is RoHS non-compliant.

Q: Do both parts have the same temperature coefficient? A: Yes. Both 42JR30 and 42JR30E have a temperature coefficient of ±90ppm/°C, providing identical thermal stability characteristics.