Ohmite 42JR50 Equivalent & Substitute Parts

Part Overview

The Ohmite 42JR50 is a 500 mOhms ±5% 2W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is classified as Active product status and is currently in stock with 839 pieces available. The 42JR50 is a non-RoHS compliant variant designed for applications requiring precision current-sensing and power dissipation in through-hole configurations. Substitute parts are identified to address packaging preferences, compliance requirements, and inventory availability while maintaining identical electrical and mechanical specifications.

Substiute Parts

42JR50

OhmiteIn Stock: 93042JR50 Datasheet

Current PartRFQ

42JR50E

OhmiteIn Stock: 92042JR50E Datasheet

Parametric EquivalentRFQ

42JR50E

OhmiteIn Stock: 92042JR50E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 42JR50E is identified as a parametric equivalent to the 42JR50. Substitution is valid based on the following criteria:

• Identical resistance value: 500 mOhms
• Identical tolerance: ±5%
• Identical power rating: 2W
• Identical composition: Wirewound
• Identical package type: Axial
• Identical temperature coefficient: ±90ppm/°C
• Identical physical dimensions: 0.220" Dia x 0.406" L (5.60mm x 10.30mm)
• Identical number of terminations: 2
• Identical ECCN classification: EAR99

The primary difference between the main part and substitute is packaging format (Bulk for 42JR50E versus standard for 42JR50) and RoHS compliance status.

Parameter Comparison

Engineering Selection Recommendations

Both the 42JR50 and 42JR50E are Active status components suitable for direct substitution in applications requiring 500 mOhms ±5% 2W axial wirewound resistors. Selection between these parts should be based on compliance requirements:

• The 42JR50E is RoHS Compliant with MSL rating of 1 (Unlimited), making it suitable for applications subject to RoHS directives and environments with no moisture sensitivity constraints.
• The 42JR50 is RoHS non-compliant and should be selected only when RoHS compliance is not a requirement.

Both parts share identical electrical characteristics, physical dimensions, and mechanical specifications, ensuring functional interchangeability in circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the 42JR50E replace the 42JR50 in all applications?

A: Yes, the 42JR50E is electrically and mechanically equivalent to the 42JR50. The primary consideration is RoHS compliance status. If your application or supply chain requires RoHS-compliant components, the 42JR50E is the appropriate selection.

Q: What is the difference between the 42JR50 and 42JR50E?

A: The parts are identical in electrical performance and physical dimensions. The 42JR50E is RoHS Compliant with an MSL rating of 1 (Unlimited), while the 42JR50 is RoHS non-compliant. Packaging format also differs (Bulk for 42JR50E).

Q: Are the physical dimensions identical between these parts?

A: Yes. Both the 42JR50 and 42JR50E have identical dimensions of 0.220" Dia x 0.406" L (5.60mm x 10.30mm) and are packaged as axial through-hole components with 2 terminations.

Q: What does the temperature coefficient ±90ppm/°C mean for these resistors?

A: The temperature coefficient specifies the resistance change per degree Celsius. A ±90ppm/°C rating indicates that the resistance value will vary by approximately 90 parts per million for each degree Celsius change in operating temperature.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Both parts are axial through-hole resistors with identical lead spacing and dimensions, allowing direct substitution on PCBs designed for either part number.