Equivalent & Substitute Parts for 40F100E

Part Overview

The Ohmite 40F100E is a 100 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 format. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation, making it suitable for current production and procurement cycles. Equivalent and substitute parts are identified to provide procurement flexibility, supply chain alternatives, and design continuity when the primary part becomes unavailable or when specific application requirements necessitate alternative sourcing.

Substiute Parts

40F100E

OhmiteIn Stock: 119640F100E Datasheet

Current PartRFQ

RS010100R0FE73

Vishay DaleIn Stock: 2449RS010100R0FE73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 40F100E are qualified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

• Resistance value: 100 Ohms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 10W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Temperature coefficient: ±20ppm/°C (exact match required)
• Compliance: RoHS3 compliant, REACH unaffected (required for regulatory alignment)

The Vishay Dale RS010100R0FE73 meets all electrical specifications and regulatory requirements. Physical dimensions vary slightly (0.375" Dia x 1.780" L versus 0.406" Dia x 1.902" L), which is acceptable within standard axial resistor tolerance ranges for PCB layout and thermal management applications. The RS series includes moisture-resistant construction, providing enhanced environmental protection compared to the base Ohmicone® 40 specification.

Parameter Comparison

Engineering Selection Recommendations

Both the 40F100E and RS010100R0FE73 are Active status components with full RoHS3 compliance and REACH unaffected designation, ensuring regulatory alignment for current and future production requirements. Selection between these parts should be based on:

• Supply availability and lead time requirements
• PCB layout constraints, as the RS010100R0FE73 has slightly smaller physical dimensions
• Environmental operating conditions, where the RS series moisture-resistant construction provides enhanced protection in humid or corrosive environments
• Packaging format preference (Bulk for 40F100E versus Cut Tape for RS010100R0FE73)

Both components deliver identical electrical performance for 100 Ohm, ±1%, 10W axial wirewound applications.

Frequently Asked Questions (FAQ)

Q: Can the RS010100R0FE73 be used as a direct replacement for the 40F100E?

A: Yes. Both components share identical electrical specifications (100 Ohms, ±1% tolerance, 10W power rating, ±20ppm/°C temperature coefficient) and axial package format. Physical dimensions differ slightly, but both conform to standard axial resistor envelope tolerances suitable for PCB mounting.

Q: What is the significance of the moisture-resistant feature on the RS010100R0FE73?

A: The moisture-resistant construction on the Vishay Dale RS series provides enhanced environmental protection in applications exposed to humidity, condensation, or corrosive atmospheres. This feature does not affect electrical performance but extends component reliability in challenging environmental conditions.

Q: Are there any compliance differences between these parts?

A: No. Both the 40F100E and RS010100R0FE73 are RoHS3 compliant and REACH unaffected, meeting identical regulatory requirements for commercial and industrial applications.

Q: How do the physical dimensions affect PCB design?

A: The RS010100R0FE73 is approximately 0.031" shorter in diameter and 0.122" shorter in length compared to the 40F100E. These differences are within standard axial resistor tolerance ranges and do not typically require PCB layout modifications. Verify clearance in space-constrained applications.

Q: What packaging formats are available?

A: The 40F100E is supplied in Bulk packaging, while the RS010100R0FE73 is available in Cut Tape (CT) format. Select based on procurement volume and assembly process requirements.