45FR30E Equivalent & Substitute Parts

Part Overview

The 45FR30E is a 5W, 300 mOhms ±1% through-hole axial wirewound resistor manufactured by Ohmite, part of 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 1131 units in current inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and design alternatives where electrical and mechanical parameters align within acceptable tolerances.

Substiute Parts

45FR30E

OhmiteIn Stock: 122745FR30E Datasheet

Current PartRFQ

ALSR05R3000FE12

Vishay DaleIn Stock: 973ALSR05R3000FE12 Datasheet

SimilarRFQ

RS005R3000FE73

Vishay DaleIn Stock: 1797RS005R3000FE73 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 45FR30E are qualified based on the following critical parameters:

• Resistance value: 300 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package: Axial through-hole (exact match required)
• Number of terminations: 2 (exact match required)

The identified substitutes—ALSR05R3000FE12 and RS005R3000FE73, both manufactured by Vishay Dale—meet all critical electrical and mechanical parameters. Both parts are Active status components with RoHS3 compliance. Dimensional variations exist within acceptable mechanical tolerances for axial package installation. Operating temperature ranges differ slightly but do not restrict substitution in standard applications.

Parameter Comparison

Engineering Selection Recommendations

Both Vishay Dale substitutes are qualified alternatives to the 45FR30E based on electrical parameter equivalence and compliance certifications.

ALSR05R3000FE12 is supplied in Bulk packaging and carries ROHS3 compliance with Vendor Undefined REACH status. This part is suitable for applications where moisture-resistant construction is beneficial.

RS005R3000FE73 is supplied in Cut Tape (CT) packaging and carries ROHS3 compliance with REACH Unaffected status. This part is suitable for automated assembly processes and applications with defined REACH requirements.

The 45FR30E remains the primary reference part with the highest operating temperature ceiling (-55°C ~ 275°C). Substitute parts operate to -65°C minimum and 250°C maximum, which accommodates most standard industrial and commercial applications. Dimensional differences are minor and do not affect standard PCB footprint compatibility for axial through-hole mounting.

Frequently Asked Questions (FAQ)

Q: Can ALSR05R3000FE12 and RS005R3000FE73 be used interchangeably with 45FR30E?

A: Yes. Both parts meet the critical electrical specifications: 300 mOhms resistance, ±1% tolerance, 5W power rating, wirewound composition, and axial package configuration. Mechanical dimensions are slightly smaller but compatible with standard axial footprints.

Q: What is the difference between ALSR05R3000FE12 and RS005R3000FE73?

A: Both parts are electrically identical. The primary differences are packaging format (Bulk vs. Cut Tape) and REACH compliance status. ALSR05R3000FE12 has Vendor Undefined REACH status, while RS005R3000FE73 is REACH Unaffected. Select based on procurement requirements and assembly process compatibility.

Q: Are there temperature limitations when substituting?

A: The 45FR30E operates to 275°C maximum; both substitutes operate to 250°C maximum. For applications requiring operation above 250°C, the 45FR30E is required. For standard applications within -55°C to 250°C, substitutes are fully qualified.

Q: Do dimensional differences affect PCB layout?

A: The 45FR30E measures 0.343" diameter × 0.937" length; substitutes measure 0.312" diameter × 0.875" length. Both fit standard axial through-hole footprints. Verify PCB hole spacing and clearance for your specific design, though standard axial spacing accommodates both sizes.

Q: What are the compliance differences?

A: The 45FR30E is RoHS Compliant. Both substitutes are ROHS3 Compliant, which represents a more recent regulatory standard. All three parts carry MSL 1 (Unlimited) moisture sensitivity rating and are suitable for standard storage and handling conditions.