45FR15 Equivalent & Substitute Parts

Part Overview

The 45FR15 is a 150 mOhms ±1% 5W axial wirewound through-hole resistor manufactured by Ohmite, part of the Ohmicone® 40 series. This component is currently active in production with 1171 pieces in stock. The part is designed for applications requiring precision low-resistance dissipation in compact axial form factors. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

45FR15

OhmiteIn Stock: 120845FR15 Datasheet

Current PartRFQ

45FR15E

OhmiteIn Stock: 93445FR15E Datasheet

DirectRFQ

ALSR05R1500FE12

Vishay DaleIn Stock: 1154ALSR05R1500FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 45FR15 is determined by strict equivalence across electrical and mechanical parameters. The following criteria establish valid substitutes:

• Resistance value: 150 mOhms (exact match required)
• Tolerance: ±1% (exact match required)
• Power rating: 5W (exact match required)
• Composition: Wirewound (exact match required)
• Package type: Axial (exact match required)
• Termination count: 2 (exact match required)

Two substitute parts meet these criteria: 45FR15E (Ohmite) and ALSR05R1500FE12 (Vishay Dale). Both maintain identical electrical specifications and axial package configuration, with minor dimensional variations within acceptable mechanical tolerances for standard through-hole PCB mounting.

Parameter Comparison

Engineering Selection Recommendations

Selection between the 45FR15 and its substitutes depends on regulatory and compliance requirements:

The 45FR15E (Ohmite) is a direct equivalent with identical dimensions and electrical specifications. This part achieves RoHS compliance and provides an expanded operating temperature range of -55°C to 275°C, compared to the main part's unspecified range. The 45FR15E is suitable for applications requiring RoHS-compliant components without dimensional constraints.

The ALSR05R1500FE12 (Vishay Dale) maintains all critical electrical parameters and achieves ROHS3 compliance. This part features moisture-resistant construction and operates across -65°C to 250°C. Dimensional differences are minor: 0.312" diameter versus 0.343", and 0.875" length versus 0.937". These variations remain within standard through-hole PCB mounting tolerances for axial components. The ALSR05R1500FE12 is suitable for applications requiring moisture resistance and ROHS3 certification.

Frequently Asked Questions (FAQ)

Q: Can the 45FR15E replace the 45FR15 in existing designs?

A: Yes. The 45FR15E maintains identical electrical specifications (150 mOhms ±1%, 5W) and physical dimensions (0.343" Dia x 0.937" L). Both are axial wirewound resistors with two terminations. The primary difference is RoHS compliance status; the 45FR15E is RoHS compliant while the 45FR15 is not.

Q: Are there dimensional compatibility concerns with the ALSR05R1500FE12?

A: The ALSR05R1500FE12 has slightly smaller dimensions (0.312" Dia x 0.875" L versus 0.343" Dia x 0.937" L). These differences are within standard axial component tolerances and do not affect through-hole PCB mounting compatibility. Verify PCB layout clearances if space constraints are critical.

Q: What is the difference in operating temperature ranges?

A: The 45FR15 operating temperature is not specified in available documentation. The 45FR15E operates from -55°C to 275°C, while the ALSR05R1500FE12 operates from -65°C to 250°C. Select based on application temperature requirements.

Q: Which substitute offers the best compliance profile?

A: The ALSR05R1500FE12 provides ROHS3 compliance and moisture-resistant construction. The 45FR15E provides RoHS compliance with a wider operating temperature range. Selection depends on specific regulatory and environmental requirements.

Q: Are all three parts electrically interchangeable?

A: Yes. All three parts share identical resistance (150 mOhms), tolerance (±1%), power rating (5W), composition (wirewound), and package type (axial). Electrical performance is equivalent across all three options.