Equivalent & Substitute Parts for Ohmite 13FR040

Part Overview

The Ohmite 13FR040 is a 40 milliohm, ±1% tolerance, 3-watt axial through-hole resistor designed for current sense applications. The component features a non-inductive metal element construction and operates across a temperature range of -55°C to 275°C. This part is currently active in production. Substitute parts are identified to provide alternative sourcing options while maintaining electrical and mechanical compatibility within the specified parameter tolerances.

Substiute Parts

13FR040

OhmiteIn Stock: 91213FR040 Datasheet

Current PartRFQ

13FR040E

OhmiteIn Stock: 392513FR040E Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 13FR040 is determined by strict equivalence across the following critical parameters:

• Resistance value: 40 mOhms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Metal Element
• Features: Current Sense, Non-Inductive
• Temperature coefficient: ±50ppm/°C
• Operating temperature range: -55°C to 275°C
• Package: Axial
• Physical dimensions: 0.205" Dia × 0.571" L (5.20mm × 14.50mm)
• Number of terminations: 2

The substitute part 13FR040E meets all electrical and mechanical parameters specified for the main part. Differences in packaging configuration (Bulk versus standard packaging) and RoHS compliance status do not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

Both the 13FR040 and 13FR040E are active production components from Ohmite with identical electrical and mechanical specifications. The primary distinction is RoHS compliance status: the 13FR040E meets ROHS3 compliance requirements, while the 13FR040 does not. Selection between these parts should be based on regulatory and procurement requirements specific to the application and end-use market. Both parts are functionally equivalent for current sense applications requiring 40 milliohm resistance at 3-watt power dissipation.

Frequently Asked Questions (FAQ)

Q: Can 13FR040E be used as a direct replacement for 13FR040?

A: Yes. The 13FR040E is electrically and mechanically equivalent to the 13FR040. All critical parameters—resistance, tolerance, power rating, temperature coefficient, operating temperature range, and physical dimensions—are identical. The parts are interchangeable from a functional standpoint.

Q: What is the difference between 13FR040 and 13FR040E?

A: The primary differences are packaging configuration and RoHS compliance. The 13FR040E is supplied in Bulk packaging and meets ROHS3 compliance standards, while the 13FR040 does not carry RoHS3 certification. Electrical performance and mechanical form factor are identical.

Q: Are there any compatibility concerns when substituting these parts?

A: No compatibility concerns exist. Both parts feature identical axial package geometry (0.205" Dia × 0.571" L), two terminations, and identical lead spacing. They are pin-compatible and mechanically interchangeable in any circuit designed for the 13FR040.

Q: Which part should I select for new designs?

A: Selection depends on regulatory requirements. For applications requiring RoHS3 compliance, specify 13FR040E. For applications without RoHS compliance mandates, either part is acceptable based on availability and procurement considerations.

Q: Do these parts have identical temperature performance?

A: Yes. Both parts operate across -55°C to 275°C with an identical temperature coefficient of ±50ppm/°C, ensuring equivalent thermal stability and performance across the full operating range.