43F8K0 Equivalent & Substitute Parts Reference

Part Overview

The 43F8K0 is an 8 kOhms ±1% 3W axial wirewound resistor manufactured by Ohmite, part of the Ohmicone® 40 series. This component is designed for through-hole applications requiring precision resistance with moderate power dissipation. The part is currently active in production with 1076 units in stock. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are required due to component availability, supply chain considerations, or specific application requirements.

Substiute Parts

43F8K0

OhmiteIn Stock: 111643F8K0 Datasheet

Current PartRFQ

ALSR038K000FE12

Vishay DaleIn Stock: 1372ALSR038K000FE12 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 43F8K0 is determined by the following critical parameters:

• Resistance Value: Must be 8 kOhms
• Tolerance: Must be ±1% or better
• Power Rating: Must be 3W or greater
• Composition: Must be wirewound
• Package Type: Must be axial with 2 terminations
• Electrical Performance: Temperature coefficient and operating temperature range must support the intended application environment

The identified substitute part ALSR038K000FE12 meets all mandatory electrical and mechanical criteria. Physical dimensions differ slightly (0.180" Dia x 0.500" L versus 0.220" Dia x 0.594" L), which is acceptable for axial through-hole applications where lead spacing and board layout accommodate standard component tolerances.

Parameter Comparison

Engineering Selection Recommendations

Both the 43F8K0 and ALSR038K000FE12 are active production components with equivalent electrical performance for 8 kOhms ±1% 3W axial wirewound applications. Selection between these parts should be based on the following factors:

43F8K0 (Ohmite): Select when the original specification requires the Ohmicone® 40 series designation, when RoHS non-compliant status is acceptable, or when the tighter temperature coefficient of ±20ppm/°C is required for precision applications.

ALSR038K000FE12 (Vishay Dale): Select when RoHS3 compliance is mandatory, when moisture-resistant construction is beneficial, or when the slightly smaller physical dimensions provide board layout advantages. The ±30ppm/°C temperature coefficient remains suitable for most industrial and commercial applications.

Both parts share identical electrical specifications (8 kOhms, ±1%, 3W) and axial package configuration, making them functionally interchangeable in circuit design.

Frequently Asked Questions (FAQ)

Q: Can ALSR038K000FE12 be used as a direct replacement for 43F8K0?

A: Yes, for applications where the electrical specifications (8 kOhms, ±1%, 3W, wirewound, axial) are the primary selection criteria. The substitute meets all mandatory parameters. Physical dimensions are slightly smaller, which is acceptable in standard through-hole PCB layouts.

Q: What is the difference in temperature coefficient between these parts?

A: The 43F8K0 has a temperature coefficient of ±20ppm/°C, while the ALSR038K000FE12 has ±30ppm/°C. For most applications, both values are acceptable. Applications requiring the tightest temperature stability should specify the 43F8K0.

Q: Does the RoHS compliance difference affect substitution?

A: RoHS compliance is a regulatory and supply chain consideration, not an electrical one. If your application or customer requires RoHS3 compliance, the ALSR038K000FE12 is the appropriate choice. If RoHS compliance is not required, both parts are functionally equivalent.

Q: Are the physical dimensions compatible with my PCB layout?

A: The ALSR038K000FE12 is slightly smaller (0.180" Dia x 0.500" L) compared to the 43F8K0 (0.220" Dia x 0.594" L). For standard through-hole designs with typical lead spacing, this difference is accommodated. Verify your specific PCB hole spacing and component clearance requirements.

Q: What is the moisture-resistant feature on the ALSR038K000FE12?

A: The ALSR038K000FE12 includes moisture-resistant construction, which provides enhanced protection in humid or corrosive environments. This is an additional feature not specified for the 43F8K0, making it suitable for applications with elevated moisture exposure.