Ohmite 45F10R Equivalent & Substitute Parts

Part Overview

The Ohmite 45F10R is a 10 Ohm ±1% 5W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is currently active in production with 1023 units in stock. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits alternative sourcing from qualified manufacturers while maintaining electrical and mechanical compatibility.

Substiute Parts

45F10R

OhmiteIn Stock: 104345F10R Datasheet

Current PartRFQ

ALSR0510R00FE12

Vishay DaleIn Stock: 1609ALSR0510R00FE12 Datasheet

DirectRFQ

RS00510R00FS73

Vishay DaleIn Stock: 1471RS00510R00FS73 Datasheet

MFR RecommendedRFQ

85F10R

OhmiteIn Stock: 71385F10R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 45F10R are qualified based on the following electrical and mechanical parameters:

• Resistance value: 10 Ohms
• Tolerance: ±1%
• Power rating: 5W
• Composition: Wirewound
• Package: Axial with 2 terminations
• Temperature coefficient: ±20ppm/°C or tighter (lower absolute value acceptable)
• Operating temperature range: Must support standard industrial applications
• Physical dimensions: Compatible with axial through-hole PCB layouts

Three substitute parts meet these criteria and are grouped as follows:

Direct Manufacturer Substitute (ALSR0510R00FE12): Vishay Dale ALSR series. Identical electrical specifications with moisture-resistant construction. Slightly smaller physical dimensions (0.312" Dia x 0.875" L) compatible with standard axial footprints. Temperature coefficient ±30ppm/°C (acceptable variance). RoHS3 compliant.

Manufacturer Recommended Substitute (RS00510R00FS73): Vishay Dale RS series. Identical electrical specifications with moisture-resistant construction. Matching physical dimensions and temperature coefficient (±20ppm/°C). Cut tape packaging. REACH affected status noted.

Parametric Equivalent (85F10R): Ohmite Acrasil® 80 series. Same manufacturer as main part. Identical electrical and physical specifications. Alternate series designation within Ohmite product line.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection (85F10R): Ohmite Acrasil® 80 series provides identical specifications and physical dimensions to the 45F10R. Same manufacturer sourcing reduces supply chain complexity. Recommended when Ohmicone® 40 series availability is constrained.

Secondary Selection (RS00510R00FS73): Vishay Dale RS series matches all critical electrical parameters and temperature coefficient. Physical dimensions are slightly reduced but remain compatible with standard axial through-hole layouts. Recommended for applications where moisture resistance is beneficial and RoHS compliance is not required.

Tertiary Selection (ALSR0510R00FE12): Vishay Dale ALSR series provides moisture-resistant construction with RoHS3 compliance. Temperature coefficient tolerance is ±30ppm/°C (wider than main part). Physical dimensions are reduced. Recommended for applications requiring RoHS compliance or enhanced moisture protection where the temperature coefficient variance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can ALSR0510R00FE12 be used as a direct replacement for 45F10R?

A: Yes. The ALSR0510R00FE12 meets all electrical specifications (10 Ohms ±1%, 5W, wirewound, axial). Physical dimensions are slightly smaller (0.312" Dia x 0.875" L vs. 0.343" Dia x 0.937" L), which is compatible with standard axial through-hole PCB footprints. Temperature coefficient is ±30ppm/°C versus ±20ppm/°C for the main part; this variance is within acceptable tolerances for most applications.

Q: What is the difference between RS00510R00FS73 and ALSR0510R00FE12?

A: Both are Vishay Dale wirewound axial resistors with identical electrical specifications. RS00510R00FS73 has a temperature coefficient of ±20ppm/°C (matching the main part), while ALSR0510R00FE12 is ±30ppm/°C. RS00510R00FS73 is supplied in cut tape packaging; ALSR0510R00FE12 is supplied in bulk. ALSR0510R00FE12 carries RoHS3 compliance; RS00510R00FS73 does not.

Q: Are the physical dimension differences between 45F10R and the Vishay Dale substitutes significant?

A: The Vishay Dale parts (ALSR0510R00FE12 and RS00510R00FS73) are approximately 8% smaller in diameter and length. These dimensions remain within standard axial through-hole component tolerances and are compatible with existing PCB layouts designed for axial resistors. Verify PCB footprint clearances if space constraints are critical.

Q: Which substitute should be selected for RoHS-compliant applications?

A: ALSR0510R00FE12 is RoHS3 compliant. The main part (45F10R), RS00510R00FS73, and 85F10R are RoHS non-compliant. If RoHS compliance is required, ALSR0510R00FE12 is the only qualified substitute.

Q: Is 85F10R considered a substitute or an equivalent?

A: 85F10R is a parametric equivalent from the same manufacturer (Ohmite). It provides identical electrical and physical specifications to the 45F10R but belongs to a different product series (Acrasil® 80 vs. Ohmicone® 40). It functions as a direct replacement with no performance variance.

Q: Can these substitutes be used interchangeably in the same design?

A: Yes, within the constraints of the specified parameters. All four parts are 10 Ohm ±1% 5W wirewound axial resistors with 2 terminations. Verify compliance requirements (RoHS status), temperature coefficient tolerance (±20ppm/°C vs. ±30ppm/°C), and physical dimensions against PCB layout constraints before final selection.