42J75R Equivalent & Substitute Parts Reference

Part Overview

The Ohmite 42J75R is a 75 Ohm, 2W axial wirewound through-hole resistor with ±5% tolerance, part of the Ohmicone® 40 series. This component is classified as Active and currently in production. Equivalent and substitute parts are identified when identical electrical specifications and mechanical compatibility are maintained across alternative packaging configurations or compliance certifications, enabling procurement flexibility and supply chain continuity.

Substiute Parts

42J75R

OhmiteIn Stock: 86042J75R Datasheet

Current PartRFQ

42J75RE

OhmiteIn Stock: 140042J75RE Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The 42J75RE qualifies as a parametric equivalent to the 42J75R based on strict electrical and mechanical alignment. Substitution is valid when the following criteria are met:

• Resistance value: 75 Ohms (identical)
• Tolerance: ±5% (identical)
• Power rating: 2W (identical)
• Composition: Wirewound (identical)
• Package configuration: Axial (identical)
• Temperature coefficient: ±20ppm/°C (identical)
• Physical dimensions: 0.220" Dia x 0.406" L (identical)
• Number of terminations: 2 (identical)

The primary distinction between these parts is packaging format (tape/reel versus bulk) and RoHS compliance status, neither of which affects electrical performance or mechanical fit in the application circuit.

Parameter Comparison

Engineering Selection Recommendations

Both the 42J75R and 42J75RE are Active products from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on the following criteria:

42J75R is appropriate for applications where standard packaging is preferred or when RoHS non-compliant components are acceptable per design requirements.

42J75RE is appropriate for applications requiring RoHS compliance certification, bulk packaging formats for high-volume assembly, or when the extended operating temperature range specification (-55°C ~ 275°C) is documented in the design.

Both parts are suitable for direct substitution in axial through-hole resistor applications requiring 75 Ohm, 2W, ±5% tolerance specifications.

Frequently Asked Questions (FAQ)

Q: Can 42J75RE replace 42J75R in production assemblies? A: Yes. Both parts are electrically and mechanically identical. The 42J75RE differs only in packaging format (bulk) and RoHS compliance status. Substitution is valid provided design documentation does not explicitly restrict RoHS compliance requirements.

Q: What is the difference between the packaging formats? A: The 42J75R uses standard packaging, while the 42J75RE is supplied in bulk format. Both maintain identical component specifications and physical dimensions for circuit board mounting.

Q: Does RoHS compliance affect component performance? A: No. RoHS compliance is a material composition and manufacturing process certification. It does not alter electrical performance, tolerance, power rating, or temperature coefficient of the resistor.

Q: Are the physical dimensions identical? A: Yes. Both parts measure 0.220" Dia x 0.406" L (5.60mm x 10.30mm) and are compatible with identical PCB footprints and through-hole spacing.

Q: Which part should be selected for new designs? A: Selection depends on compliance requirements. If RoHS compliance is required, specify 42J75RE. If RoHS status is not a design constraint, either part is acceptable based on packaging and procurement preferences.