Equivalent & Substitute Parts for 40F50RE

Part Overview

The Ohmite 40F50RE is a 50 Ohm, 1% tolerance, 10W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with high power dissipation capability in a compact axial package. The part is currently active in production with 914 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to availability, supply chain considerations, or design flexibility.

Substiute Parts

40F50RE

OhmiteIn Stock: 93640F50RE Datasheet

Current PartRFQ

RS01050R00FE73

Vishay DaleIn Stock: 4034RS01050R00FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 40F50RE is determined by strict equivalence across the following critical parameters:

• Resistance value: 50 Ohms (exact match required)
• Tolerance: ±1% (precision specification)
• Power rating: 10W (thermal and current handling capability)
• Composition: Wirewound (electrical performance characteristics)
• Package: Axial (mechanical and board layout compatibility)
• Temperature coefficient: ±20ppm/°C (stability specification)
• Regulatory compliance: ROHS3 Compliant, REACH Unaffected, EAR99 classification

The Vishay Dale RS01050R00FE73 meets all these criteria and is classified as a manufacturer-recommended substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F50RE and RS01050R00FE73 are active production components with full regulatory compliance. Selection between these parts should be based on:

• Availability and lead time requirements
• Packaging format preference (Bulk versus Cut Tape)
• Physical dimensions: The RS01050R00FE73 is slightly smaller in both diameter and length, which may be advantageous in space-constrained layouts
• Inventory status: The RS01050R00FE73 has higher stock availability (3975 units versus 914 units)
• Additional feature consideration: The RS01050R00FE73 includes moisture-resistant construction, providing enhanced environmental protection

Both parts satisfy identical electrical specifications and regulatory requirements for direct substitution in 50 Ohm, 10W axial wirewound resistor applications.

Frequently Asked Questions (FAQ)

Q: Can the RS01050R00FE73 be used as a direct replacement for the 40F50RE?

A: Yes. Both parts share identical electrical specifications: 50 Ohms, ±1% tolerance, 10W power rating, ±20ppm/°C temperature coefficient, and wirewound composition. Both are ROHS3 compliant and REACH unaffected. The RS01050R00FE73 is slightly smaller in physical dimensions but maintains full axial package compatibility.

Q: What are the physical dimension differences?

A: The 40F50RE measures 0.406" diameter × 1.902" length (10.30mm × 48.30mm). The RS01050R00FE73 measures 0.375" diameter × 1.780" length (9.53mm × 45.21mm). Both are axial through-hole components suitable for standard PCB mounting.

Q: Are there any performance differences between these parts?

A: No. Both parts meet identical electrical specifications for resistance value, tolerance, power dissipation, and temperature stability. The RS01050R00FE73 includes moisture-resistant construction as an additional feature.

Q: What packaging formats are available?

A: The 40F50RE is supplied in Bulk packaging. The RS01050R00FE73 is supplied in Cut Tape (CT) format. Selection depends on assembly process requirements and order quantity.

Q: Are both parts compliant with current regulations?

A: Yes. Both the 40F50RE and RS01050R00FE73 are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.