Ohmite 45F150 150 Ohm 5W Axial Wirewound Resistor Equivalent & Substitute Parts

Part Overview

The Ohmite 45F150 is a 150 Ohm ±1% 5W through-hole axial wirewound resistor from the Ohmicone® 40 series. This component is currently active in production with 1146 units in stock. Equivalent and substitute parts are necessary when the primary part becomes unavailable, when specific compliance requirements must be met, or when packaging preferences differ for manufacturing operations.

Substiute Parts

45F150

OhmiteIn Stock: 120945F150 Datasheet

Current PartRFQ

45F150E

OhmiteIn Stock: 94345F150E Datasheet

DirectRFQ

ALSR05150R0FE12

Vishay DaleIn Stock: 2786ALSR05150R0FE12 Datasheet

DirectRFQ

RS005150R0FS73

Vishay DaleIn Stock: 2032RS005150R0FS73 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Ohmite 45F150 is determined by the following critical parameters:

• Resistance Value: Must be 150 Ohms
• Tolerance: Must be ±1%
• Power Rating: Must be 5W
• Composition: Must be Wirewound
• Package: Must be Axial with 2 terminations
• Temperature Coefficient: ±20ppm/°C or ±30ppm/°C acceptable within wirewound specifications

All substitute parts listed meet these core electrical and mechanical requirements. Variations in physical dimensions, operating temperature ranges, RoHS compliance status, and packaging format (bulk vs. cut tape) do not affect functional substitutability for this resistor category.

Parameter Comparison

Engineering Selection Recommendations

Ohmite 45F150E: This direct Ohmite manufacturer equivalent maintains identical electrical specifications and physical dimensions to the primary part. It is RoHS Compliant and rated for -55°C to 275°C operation, providing the widest temperature range among all options. Select this part when RoHS compliance is required and maximum thermal operating range is beneficial.

Vishay Dale ALSR05150R0FE12: This substitute from the ALSR series meets all core electrical requirements with a slightly higher temperature coefficient (±30ppm/°C). It features moisture-resistant construction and ROHS3 compliance. Physical dimensions are slightly smaller (0.312" Dia x 0.875" L). Select this part when moisture resistance is a design consideration and compact dimensions are acceptable.

Vishay Dale RS005150R0FS73: This substitute from the RS series matches the primary part's temperature coefficient (±20ppm/°C) and operating range (-65°C to 250°C). It includes moisture-resistant features and is supplied in cut tape packaging. Physical dimensions are identical to the ALSR variant. This part is RoHS non-compliant. Select this part when moisture resistance and precise temperature coefficient matching are required and RoHS compliance is not mandated.

Frequently Asked Questions (FAQ)

Q: Can the Ohmite 45F150E be used as a direct replacement for the Ohmite 45F150?

A: Yes. The 45F150E is a direct Ohmite manufacturer equivalent with identical resistance, tolerance, power rating, temperature coefficient, and physical dimensions. The primary difference is RoHS compliance status (45F150E is compliant). Both are suitable for the same circuit applications.

Q: What is the difference between the Vishay Dale ALSR and RS series substitutes?

A: Both Vishay Dale parts meet the core electrical specifications (150 Ohms ±1% 5W wirewound). The ALSR05150R0FE12 has a temperature coefficient of ±30ppm/°C, while the RS005150R0FS73 matches the primary part at ±20ppm/°C. The RS series part is supplied in cut tape packaging; the ALSR is supplied in bulk. Both feature moisture-resistant construction.

Q: Are there physical dimension differences between substitutes?

A: Yes. The Ohmite 45F150 and 45F150E are 0.343" Dia x 0.937" L. The Vishay Dale parts (ALSR05150R0FE12 and RS005150R0FS73) are 0.312" Dia x 0.875" L. These dimensional differences are within standard axial wirewound resistor tolerances and do not affect electrical performance or PCB layout compatibility for standard through-hole applications.

Q: Which substitute should be selected for RoHS-compliant applications?

A: The Ohmite 45F150E and Vishay Dale ALSR05150R0FE12 are both RoHS compliant. The 45F150E is RoHS Compliant; the ALSR05150R0FE12 is ROHS3 Compliant. The RS005150R0FS73 is RoHS non-compliant.

Q: What is the significance of moisture-resistant construction in the Vishay Dale substitutes?

A: The ALSR05150R0FE12 and RS005150R0FS73 include moisture-resistant features in their wirewound construction. This provides enhanced performance in high-humidity environments or applications with condensation exposure. The primary Ohmite parts do not specify moisture-resistant features.

Q: Can substitutes be mixed within a single assembly?

A: All listed parts are electrically equivalent for the specified 150 Ohm ±1% 5W application. However, mixing different manufacturers or series within a single PCB assembly may introduce minor variations in temperature coefficient (±20ppm/°C vs. ±30ppm/°C) and physical dimensions. For consistency, use a single part number across an assembly unless design requirements explicitly allow variation.