43F150 Equivalent & Substitute Parts

Part Overview

The Ohmite 43F150 is a 150 Ohm ±1% 3W axial wirewound through-hole resistor from the Ohmicone® 40 series. This component is designed for applications requiring precision resistance with moderate power dissipation in a compact axial package. The part is currently active in production. Equivalent and substitute parts may be required due to inventory availability, supply chain considerations, or specific compliance requirements for end applications.

Substiute Parts

43F150

OhmiteIn Stock: 85443F150 Datasheet

Current PartRFQ

43F150E

OhmiteIn Stock: 85443F150E Datasheet

DirectRFQ

ALSR03150R0FE12

Vishay DaleIn Stock: 1078ALSR03150R0FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43F150 is determined by matching the following critical parameters:

• Resistance value: 150 Ohms
• Tolerance: ±1%
• Power rating: 3W
• Composition: Wirewound
• Package: Axial through-hole
• Terminations: 2-pin configuration

The 43F150E (Ohmite) and ALSR03150R0FE12 (Vishay Dale) meet all core electrical and mechanical requirements for direct substitution. Both parts maintain identical resistance, tolerance, power rating, and axial package configuration. Physical dimensions vary slightly between manufacturers but remain compatible with standard axial component footprints.

Parameter Comparison

Engineering Selection Recommendations

43F150E (Ohmite): This direct variant from Ohmite maintains identical electrical specifications and physical dimensions to the 43F150. The 43F150E achieves RoHS compliance and specifies an operating temperature range of -55°C to 275°C, providing broader environmental coverage than the original part. Selection is appropriate for applications requiring RoHS certification or extended temperature operation.

ALSR03150R0FE12 (Vishay Dale): This Vishay Dale alternative meets all core electrical requirements with a slightly smaller physical footprint (0.180" diameter vs. 0.220"). The ALSR series includes moisture-resistant construction and achieves ROHS3 compliance. The temperature coefficient is ±30ppm/°C compared to ±20ppm/°C for Ohmite variants. Operating temperature range extends to -65°C. Selection is appropriate for applications requiring moisture resistance, enhanced low-temperature performance, or ROHS3 certification.

Frequently Asked Questions (FAQ)

Q: Can the 43F150E directly replace the 43F150? A: Yes. The 43F150E is a direct Ohmite variant with identical electrical specifications (150 Ohms ±1%, 3W) and physical dimensions (0.220" Dia x 0.594" L). The primary difference is RoHS compliance status.

Q: What is the key difference between the Ohmite and Vishay Dale options? A: Both meet core electrical requirements. The Vishay Dale ALSR03150R0FE12 features moisture-resistant construction, a slightly smaller diameter (0.180" vs. 0.220"), and a higher temperature coefficient (±30ppm/°C vs. ±20ppm/°C). Operating temperature ranges differ: Ohmite 43F150E operates -55°C to 275°C; Vishay Dale operates -65°C to 250°C.

Q: Are physical dimension differences significant for PCB layout? A: The Vishay Dale part is smaller in diameter (0.180" vs. 0.220") and length (0.500" vs. 0.594"). Both remain compatible with standard axial component footprints, but verify PCB hole spacing and component clearance for your specific layout.

Q: Which substitute should I select for RoHS compliance? A: Both 43F150E (RoHS Compliant) and ALSR03150R0FE12 (ROHS3 Compliant) meet RoHS requirements. The ALSR03150R0FE12 meets the more recent ROHS3 standard.

Q: Does the temperature coefficient difference affect substitution? A: The Vishay Dale part has a ±30ppm/°C coefficient versus ±20ppm/°C for Ohmite variants. For precision applications with tight tolerance requirements across temperature ranges, verify that the higher coefficient meets your circuit specifications.

Q: Can I use the smaller Vishay Dale part in existing designs? A: The smaller physical dimensions of the ALSR03150R0FE12 may require PCB layout verification. Confirm that component lead spacing and clearances are compatible with your existing footprint before substitution.