45FR33 Equivalent & Substitute Parts

Part Overview

The 45FR33 is a 330 mOhms ±1% 5W axial wirewound through-hole resistor manufactured by Ohmite in the Ohmicone® 40 series. This component is actively produced and maintains 765 pieces in current inventory stock. The part is specified for applications requiring precision low-resistance dissipation in through-hole configurations. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

45FR33

OhmiteIn Stock: 84545FR33 Datasheet

Current PartRFQ

45FR33E

OhmiteIn Stock: 99545FR33E Datasheet

DirectRFQ

ALSR05R3300FE12

Vishay DaleIn Stock: 1196ALSR05R3300FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 45FR33 are qualified based on matching the following critical parameters: resistance value (330 mOhms), tolerance (±1%), power rating (5W), composition (wirewound), and package type (axial through-hole). All identified substitutes maintain these core electrical and mechanical specifications, ensuring functional equivalence in circuit applications.

The following parts meet these substitution criteria:

• 45FR33E (Ohmite, Ohmicone® 40 series)
• ALSR05R3300FE12 (Vishay Dale, ALSR series)

Parameter Comparison

Engineering Selection Recommendations

The 45FR33E represents a direct equivalent within the Ohmite product line, maintaining identical electrical specifications and physical dimensions while offering improved RoHS compliance status and defined operating temperature range (-55°C ~ 275°C). This part is suitable for applications where Ohmite series continuity is required.

The ALSR05R3300FE12 from Vishay Dale provides functional equivalence with identical electrical parameters and ROHS3 compliance. Physical dimensions are slightly reduced (0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L), which may be advantageous in space-constrained layouts. Operating temperature range extends to -65°C minimum, supporting broader environmental specifications. The moisture-resistant feature provides additional environmental protection.

Selection between substitutes should be based on compliance requirements, thermal operating range specifications, physical space constraints, and supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can the 45FR33E be used as a direct replacement for the 45FR33?

A: Yes. The 45FR33E maintains identical resistance (330 mOhms), tolerance (±1%), power rating (5W), composition (wirewound), and physical dimensions (0.343" Dia x 0.937" L). Both are Ohmite Ohmicone® 40 series components with active product status.

Q: What are the physical dimension differences between substitutes?

A: The 45FR33 and 45FR33E share identical dimensions (0.343" Dia x 0.937" L / 8.70mm x 23.80mm). The ALSR05R3300FE12 has slightly smaller dimensions (0.312" Dia x 0.875" L / 7.92mm x 22.23mm), which may affect board layout and mounting considerations.

Q: Are all substitutes RoHS compliant?

A: The 45FR33 is RoHS non-compliant. The 45FR33E is RoHS Compliant. The ALSR05R3300FE12 is ROHS3 Compliant. Selection depends on regulatory and procurement requirements.

Q: What is the operating temperature range for each part?

A: The 45FR33 does not specify an operating temperature range. The 45FR33E operates from -55°C to 275°C. The ALSR05R3300FE12 operates from -65°C to 250°C. Application thermal requirements should guide selection.

Q: Do all parts have the same temperature coefficient?

A: The 45FR33 and 45FR33E both specify ±90ppm/°C. The ALSR05R3300FE12 does not provide a temperature coefficient specification.

Q: Are moisture-resistant features available?

A: The ALSR05R3300FE12 includes moisture-resistant construction. The 45FR33 and 45FR33E do not specify this feature. All three parts have MSL rating of 1 (Unlimited) or Not Applicable.