Equivalent & Substitute Parts for Ohmite 14FPR050E

Part Overview

The Ohmite 14FPR050E is a 50 mOhms ±1% 4.5W axial through-hole resistor designed for current sense applications with non-inductive metal element construction. This part is classified as obsolete, necessitating identification of active equivalent components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Substiute Parts

14FPR050E

OhmiteIn Stock: 85714FPR050E Datasheet

Current PartRFQ

17FPR050E

OhmiteIn Stock: 118317FPR050E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 14FPR050E is based on the following critical parameters that must remain constant:

• Resistance Value: 50 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Composition: Metal Element (required for current sense application stability)
• Features: Current Sense, Non-Inductive (functional requirement)
• Temperature Coefficient: ±50ppm/°C (exact match required)
• Operating Temperature Range: -55°C to 200°C (exact match required)
• Package Type: Axial (mechanical compatibility)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

The Ohmite 17FPR050E meets all these criteria while offering increased power rating (7W versus 4.5W), making it a direct electrical and mechanical substitute with enhanced thermal capability.

Parameter Comparison

Engineering Selection Recommendations

The Ohmite 17FPR050E is the direct substitute for the obsolete 14FPR050E. Both components are manufactured by Ohmite and maintain identical electrical specifications including resistance value, tolerance, temperature coefficient, and operating temperature range. Both are ROHS3 compliant.

The 17FPR050E offers a higher power rating (7W versus 4.5W) while maintaining all other electrical parameters. This increased power capability provides enhanced thermal margin in current sense applications without altering circuit behavior. The physical size increase (0.375" diameter × 1.500" length versus 0.335" diameter × 1.059" length) must be verified for PCB layout compatibility in existing designs.

The 17FPR050E is currently in active production status, ensuring long-term availability and supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 17FPR050E be used as a direct replacement for the 14FPR050E?

A: Yes. The 17FPR050E maintains identical electrical specifications (50 mOhms ±1%, ±50ppm/°C temperature coefficient, -55°C to 200°C operating range) and is manufactured by the same supplier using the same metal element composition. Physical dimensions are larger, requiring verification of PCB layout clearance.

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

A: The 17FPR050E has a higher power rating (7W) compared to the 14FPR050E (4.5W). All other electrical parameters are identical. The increased power rating results in larger physical dimensions.

Q: Are there any compatibility concerns with the larger package size?

A: The 17FPR050E is 0.040" larger in diameter and 0.441" longer than the 14FPR050E. PCB layout and mechanical clearance must be verified before implementation in existing designs.

Q: Is the 17FPR050E RoHS compliant?

A: Yes. The 17FPR050E is ROHS3 compliant, matching the compliance status of the 14FPR050E.

Q: Why is the 14FPR050E obsolete?

A: The 14FPR050E is classified as obsolete by the manufacturer. The 17FPR050E is the active equivalent offering superior power handling capability while maintaining all critical electrical specifications.