Ohmite 43J75RE Equivalent & Substitute Parts

Part Overview

The Ohmite 43J75RE is a 75 Ohms ±5% 3W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is designed for applications requiring precision power dissipation in compact form factors. The part maintains active product status with 1034 units in current inventory. Substitute parts are identified when equivalent electrical performance can be achieved with improved tolerance specifications or alternative packaging configurations while maintaining core functional parameters.

Substiute Parts

43J75RE

OhmiteIn Stock: 105843J75RE Datasheet

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43F75RE

OhmiteIn Stock: 79643F75RE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43J75RE is determined by the following core parameters:

• Resistance Value: Must be 75 Ohms
• Power Rating: Must be 3W minimum
• Composition: Wirewound construction required
• Package Type: Axial through-hole configuration
• Temperature Coefficient: ±20ppm/°C
• Operating Temperature Range: -55°C to 275°C minimum
• RoHS Compliance: Required
• Physical Footprint: 0.220" Dia x 0.594" L (5.60mm x 15.10mm)

The Ohmite 43F75RE qualifies as a direct substitute based on matching all core electrical and mechanical parameters. The primary distinction is tolerance specification: the 43F75RE provides ±1% tolerance compared to the ±5% tolerance of the 43J75RE, representing an upgrade in precision capability while maintaining identical power dissipation, temperature performance, and physical form factor.

Parameter Comparison

Engineering Selection Recommendations

Both the 43J75RE and 43F75RE maintain active product status with full RoHS compliance and MSL 1 moisture sensitivity rating. Selection between these parts should be based on circuit tolerance requirements. The 43J75RE is suitable for applications where ±5% resistance tolerance meets design specifications. The 43F75RE provides improved tolerance performance at ±1% for circuits requiring tighter resistance accuracy, with identical thermal and power characteristics. Both parts are manufactured by Ohmite and share identical physical dimensions, thermal coefficients, and operating temperature ranges, ensuring direct mechanical and thermal compatibility in axial through-hole applications.

Frequently Asked Questions (FAQ)

Q: Can the 43F75RE directly replace the 43J75RE in existing designs?

A: Yes. Both parts share identical resistance value (75 Ohms), power rating (3W), physical dimensions (0.220" Dia x 0.594" L), temperature coefficient (±20ppm/°C), and operating temperature range (-55°C to 275°C). The 43F75RE provides superior tolerance (±1% versus ±5%), making it a direct upgrade for axial through-hole applications.

Q: What is the primary difference between these two parts?

A: The tolerance specification differs. The 43J75RE provides ±5% tolerance, while the 43F75RE provides ±1% tolerance. All other electrical and mechanical parameters are identical.

Q: Are both parts RoHS compliant?

A: Yes. Both the 43J75RE and 43F75RE are RoHS compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Will the 43F75RE fit the same PCB footprint as the 43J75RE?

A: Yes. Both parts have identical physical dimensions of 0.220" Dia x 0.594" L (5.60mm x 15.10mm) and use axial through-hole packaging, ensuring identical PCB footprint compatibility.

Q: What is the operating temperature range for both parts?

A: Both the 43J75RE and 43F75RE operate across the temperature range of -55°C to 275°C with a temperature coefficient of ±20ppm/°C.