Ohmite 15FR025 Equivalent & Substitute Parts

Part Overview

The Ohmite 15FR025 is a 25 mOhms ±1% 5W axial through-hole resistor designed for current sense applications. The metal element construction provides non-inductive performance suitable for precision measurement circuits. This part is currently active in production and widely used in power management and monitoring applications where accurate low-resistance measurement is critical.

Substitute parts are identified when electrical specifications, mechanical compatibility, and functional performance remain equivalent across the allowed parameter range for this resistor category.

Substiute Parts

15FR025

OhmiteIn Stock: 112115FR025 Datasheet

Current PartRFQ

15FR025E

OhmiteIn Stock: 88715FR025E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 15FR025 is determined by strict equivalence across the following critical parameters:

• Resistance value: 25 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Metal Element (exact match required)
• Package type: Axial (exact match required)
• Operating temperature range: -55°C ~ 275°C (exact match required)
• Functional features: Current Sense, Non-Inductive (exact match required)
• Physical dimensions: 0.331" Dia x 0.937" L (exact match required)

The 15FR025E qualifies as a direct substitute because it maintains identical electrical specifications, mechanical form factor, and functional performance across all critical parameters. Variations in temperature coefficient and compliance certifications do not affect substitution eligibility within the allowed parameter scope for this resistor category.

Parameter Comparison

Engineering Selection Recommendations

Both the 15FR025 and 15FR025E are active production parts from Ohmite with identical electrical and mechanical specifications. Selection between these parts should be based on regulatory and compliance requirements specific to the application:

The 15FR025E is RoHS Compliant and carries Moisture Sensitivity Level 1 (Unlimited), making it suitable for applications subject to RoHS directives and environments with variable humidity exposure.

The 15FR025 is RoHS non-compliant and should be selected only when legacy system compatibility or specific application constraints require the original specification.

Both parts operate across the full -55°C ~ 275°C temperature range and maintain the required current sense and non-inductive performance characteristics. The difference in temperature coefficient (±50ppm/°C versus ±140ppm/°C) reflects manufacturing process variations but does not affect substitution eligibility within the ±1% tolerance specification.

Frequently Asked Questions (FAQ)

Q: Can the 15FR025E replace the 15FR025 in existing designs?

A: Yes. The 15FR025E is electrically and mechanically equivalent. Both parts have identical resistance (25 mOhms), tolerance (±1%), power rating (5W), package type (Axial), and physical dimensions (0.331" Dia x 0.937" L). Direct substitution on the PCB is possible without layout modifications.

Q: What is the difference between these two part numbers?

A: The primary differences are RoHS compliance status and temperature coefficient specification. The 15FR025E is RoHS Compliant with a temperature coefficient of ±140ppm/°C, while the 15FR025 is RoHS non-compliant with a temperature coefficient of ±50ppm/°C. Both maintain the ±1% tolerance specification across their operating range.

Q: Are there packaging differences between 15FR025 and 15FR025E?

A: The physical package and form factor are identical (Axial, 0.331" Dia x 0.937" L). The 15FR025E is supplied in Bulk packaging, while the 15FR025 uses standard packaging. This does not affect component performance or board-level compatibility.

Q: Which part should I specify for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS compliance, specify the 15FR025E. For legacy systems or applications without RoHS requirements, either part is acceptable based on availability and supply chain considerations.

Q: Can these parts be used interchangeably in current sense circuits?

A: Yes. Both parts are designed for current sense applications with non-inductive metal element construction. The identical resistance, tolerance, and power rating ensure equivalent measurement accuracy and thermal performance in circuit applications.