Ohmite 45F82R Equivalent & Substitute Parts

Part Overview

The Ohmite 45F82R is an 82 Ohm ±1% 5W through-hole resistor with axial wirewound construction, part of the Ohmicone® 40 series. This component is currently active in production with 905 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and design continuity when the primary part becomes unavailable or when alternative packaging or compliance requirements necessitate component substitution.

Substiute Parts

45F82R

OhmiteIn Stock: 93945F82R Datasheet

Current PartRFQ

45F82RE

OhmiteIn Stock: 118545F82RE Datasheet

DirectRFQ

ALSR0582R00FE12

Vishay DaleIn Stock: 1074ALSR0582R00FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45F82R is determined by the following critical parameters: resistance value (82 Ohms), tolerance (±1%), power rating (5W), composition (wirewound), and package configuration (axial with 2 terminations). All identified substitutes maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit applications.

The substitute parts are grouped as follows:

Direct Equivalent (Same Manufacturer): 45F82RE is an Ohmite part with identical electrical specifications and axial package configuration. The primary difference is packaging format (bulk versus standard).

Cross-Manufacturer Equivalent: ALSR0582R00FE12 is a Vishay Dale part meeting all critical substitution parameters. This part introduces additional features (moisture resistance) and an extended operating temperature range, with a slightly different physical dimension and temperature coefficient specification.

Parameter Comparison

Engineering Selection Recommendations

45F82RE (Ohmite): This part is the direct equivalent from the same manufacturer. Selection is appropriate when ROHS3 compliance is required or when bulk packaging is preferred. Identical electrical and physical specifications ensure direct substitution without circuit redesign.

ALSR0582R00FE12 (Vishay Dale): This part is suitable for applications requiring ROHS3 compliance, moisture resistance, or extended operating temperature range (-65°C to 250°C). The slightly smaller physical dimensions and marginally higher temperature coefficient (±30ppm/°C versus ±20ppm/°C) must be evaluated for space-constrained layouts and precision temperature-dependent circuits. This part is appropriate for harsh environment or high-reliability applications.

Selection between 45F82RE and ALSR0582R00FE12 depends on regulatory compliance requirements, environmental operating conditions, and physical space constraints. Both parts maintain the core electrical specifications required for functional equivalence.

Frequently Asked Questions (FAQ)

Q: Can 45F82RE be used as a direct replacement for 45F82R? A: Yes. Both parts are manufactured by Ohmite with identical resistance (82 Ohms), tolerance (±1%), power rating (5W), composition (wirewound), and axial package configuration. The difference is packaging format and RoHS compliance status.

Q: What are the key differences between the Ohmite and Vishay Dale parts? A: The ALSR0582R00FE12 (Vishay Dale) offers ROHS3 compliance, moisture resistance, and an extended operating temperature range (-65°C to 250°C). Physical dimensions are slightly smaller (0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L), and the temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for Ohmite parts.

Q: Are the physical dimensions interchangeable between all three parts? A: The Ohmite parts (45F82R and 45F82RE) share identical dimensions. The Vishay Dale ALSR0582R00FE12 is slightly smaller in both diameter and length. Verify PCB layout and mechanical clearances before substitution in space-constrained applications.

Q: Which part should be selected for RoHS-compliant designs? A: Both 45F82RE and ALSR0582R00FE12 are ROHS3 compliant. The original 45F82R is RoHS non-compliant. Select either compliant part based on environmental requirements and availability.

Q: Is the temperature coefficient difference significant? A: The ALSR0582R00FE12 has a temperature coefficient of ±30ppm/°C compared to ±20ppm/°C for Ohmite parts. This difference is relevant only in precision circuits where temperature-dependent resistance drift must be minimized. For general applications, both specifications are acceptable.