Ohmite 42J3R0 Equivalent & Substitute Parts

Part Overview

The Ohmite 42J3R0 is a 3 Ohm, 2W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with moderate power dissipation in compact axial packaging. The part is currently active in production with 1096 units in stock. Substitute parts are identified when packaging configurations, compliance certifications, or inventory availability require alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

42J3R0

OhmiteIn Stock: 113642J3R0 Datasheet

Current PartRFQ

42J3R0E

OhmiteIn Stock: 121042J3R0E Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Ohmite 42J3R0E qualifies as a parametric equivalent based on the following criteria:

Electrical Parameters (Identical):

• Resistance value: 3 Ohms
• Tolerance: ±5%
• Power rating: 2W
• Temperature coefficient: ±50ppm/°C
• Composition: Wirewound

Mechanical Parameters (Identical):

• Package type: Axial
• Physical dimensions: 0.220" Dia x 0.406" L (5.60mm x 10.30mm)
• Number of terminations: 2

Differentiation Factors:

• Packaging configuration: 42J3R0 supplied in standard packaging; 42J3R0E supplied in bulk
• RoHS compliance: 42J3R0 is non-compliant; 42J3R0E is compliant
• Operating temperature range: 42J3R0E specifies -55°C ~ 275°C
• Moisture sensitivity: 42J3R0E rated MSL 1 (Unlimited)

Parameter Comparison

Engineering Selection Recommendations

Use 42J3R0 when:

• Standard packaging configuration is required
• RoHS non-compliant designs are acceptable
• Existing supply chain specifications reference the standard packaging variant

Use 42J3R0E when:

• RoHS compliance is mandated by design or regulatory requirements
• Bulk packaging is compatible with assembly processes
• Operating temperature range of -55°C ~ 275°C is specified
• Moisture sensitivity level MSL 1 (Unlimited) is required

Both parts are active products from Ohmite with identical electrical and mechanical performance. Selection between them is determined by compliance requirements and packaging configuration needs rather than functional capability.

Frequently Asked Questions (FAQ)

Q: Are 42J3R0 and 42J3R0E electrically interchangeable?

A: Yes. Both parts have identical resistance (3 Ohms), tolerance (±5%), power rating (2W), temperature coefficient (±50ppm/°C), and wirewound composition. They perform identically in circuit applications.

Q: What is the primary difference between these parts?

A: The main differences are RoHS compliance status (42J3R0E is compliant; 42J3R0 is not), packaging configuration (bulk vs. standard), and specified operating temperature range (42J3R0E specifies -55°C ~ 275°C).

Q: Can I substitute 42J3R0E for 42J3R0 in existing designs?

A: Yes, provided that bulk packaging is compatible with your assembly process. The electrical and mechanical specifications are identical, and the axial package dimensions match exactly.

Q: Does the bulk packaging of 42J3R0E affect circuit performance?

A: No. Packaging configuration does not affect electrical performance. The component itself is identical; only the supply format differs.

Q: Which part should I specify for new designs?

A: If RoHS compliance is required, specify 42J3R0E. If RoHS compliance is not a constraint and standard packaging is preferred, either part is suitable. Verify packaging compatibility with your assembly process.

Q: Are both parts currently available?

A: Yes. 42J3R0 has 1096 units in stock, and 42J3R0E has 1167 units in stock.