45FR33E Equivalent & Substitute Parts

Part Overview

The Ohmite 45FR33E is a 330 mOhms ±1% 5W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring low-resistance, high-power dissipation in a compact axial package. The part maintains Active product status with full ROHS3 compliance and EAR99 export classification. Equivalent and substitute parts are identified based on matching electrical specifications and mechanical compatibility to ensure direct functional replacement in circuit designs.

Substiute Parts

45FR33E

OhmiteIn Stock: 86845FR33E Datasheet

Current PartRFQ

ALSR05R3300FE12

Vishay DaleIn Stock: 1196ALSR05R3300FE12 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45FR33E is determined by the following critical parameters:

• Resistance Value: Must be 330 mOhms (0.33 Ω)
• Tolerance: Must be ±1% or tighter
• Power Rating: Must be 5W or greater
• Composition: Must be wirewound
• Package Type: Must be axial with 2 terminations
• Compliance: Must maintain ROHS3 compliance and EAR99 classification

The Vishay Dale ALSR05R3300FE12 meets all substitution criteria. This part shares identical electrical specifications and package configuration, with the addition of moisture-resistant construction and an extended operating temperature range of -65°C to 250°C.

Parameter Comparison

Engineering Selection Recommendations

Both the 45FR33E and ALSR05R3300FE12 are Active products with full ROHS3 compliance and identical EAR99 export classification, making them functionally equivalent for component selection purposes. The ALSR05R3300FE12 provides additional moisture-resistant construction and an extended operating temperature range (-65°C to 250°C), which may offer enhanced reliability in demanding environmental conditions. Physical dimensions differ slightly, with the Vishay Dale part being marginally smaller in both diameter and length, which may provide layout advantages in space-constrained applications. Both parts are suitable for direct substitution in circuits designed for the 45FR33E specification.

Frequently Asked Questions (FAQ)

Q: Can the ALSR05R3300FE12 be used as a direct replacement for the 45FR33E?

A: Yes. Both parts share identical resistance value (330 mOhms), tolerance (±1%), power rating (5W), composition (wirewound), and axial package configuration with 2 terminations. Both maintain ROHS3 compliance and EAR99 classification.

Q: What are the physical dimension differences between these parts?

A: The 45FR33E measures 0.343" diameter × 0.937" length (8.70mm × 23.80mm). The ALSR05R3300FE12 measures 0.312" diameter × 0.875" length (7.92mm × 22.23mm). The Vishay Dale part is slightly smaller in both dimensions.

Q: Does the moisture-resistant feature of the ALSR05R3300FE12 affect compatibility?

A: No. Moisture-resistant construction is an additional feature that does not impact electrical or mechanical compatibility. It provides enhanced performance in humid or corrosive environments without affecting standard circuit operation.

Q: Are there operating temperature differences between these parts?

A: The 45FR33E does not specify an operating temperature range in the provided data. The ALSR05R3300FE12 operates from -65°C to 250°C, providing a defined thermal operating window for applications requiring temperature specification.

Q: Can these parts be used interchangeably in PCB layouts?

A: Physical dimensions differ slightly. Verify PCB footprint clearances and lead spacing accommodate the specific part selected. The smaller dimensions of the ALSR05R3300FE12 may provide layout flexibility in space-constrained designs.